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124 results on '"HAN, LX"'

1. Beam-energy dependence of charge balance functions from Au + Au collisions at energies available at the BNL Relativistic Heavy Ion Collider

Author: Adamczyk, L, Adkins, JK, Agakishiev, G, Aggarwal, MM, Ahammed, Z, Alekseev, I, Alford, J, Aparin, A, Arkhipkin, D, Aschenauer, EC, Averichev, GS, Banerjee, A, Bellwied, R, Bhasin, A, Bhati, AK, Bhattarai, P, Bielcik, J, Bielcikova, J, Bland, LC, Bordyuzhin, IG, Bouchet, J, Brandin, AV, Bunzarov, I, Burton, TP, Butterworth, J, Caines, H, Calderón De La Barca Sánchez, M, Campbell, JM, Cebra, D, Cervantes, MC, Chakaberia, I, Chaloupka, P, Chang, Z, Chattopadhyay, S, Chen, JH, Chen, HF, Cheng, J, Cherney, M, Christie, W, Codrington, MJM, Contin, G, Crawford, HJ, Cui, X, Das, S, De Silva, LC, Debbe, RR, Dedovich, TG, Deng, J, Derevschikov, AA, Derradi De Souza, R, Di Ruzza, B, Didenko, L, Dilks, C, Dong, X, Drachenberg, JL, Draper, JE, Du, CM, Dunkelberger, LE, Dunlop, JC, Efimov, LG, Engelage, J, Eppley, G, Esha, R, Evdokimov, O, Eyser, O, Fatemi, R, Fazio, S, Federic, P, Fedorisin, J, Feng, Filip, P, Fisyak, Y, Flores, CE, Gagliardi, CA, Garand, D, Geurts, F, Gibson, A, Girard, M, Greiner, L, Grosnick, D, Gunarathne, DS, Guo, Y, Gupta, A, Gupta, S, Guryn, W, Hamad, A, Hamed, A, Han, LX, Haque, R, Harris, JW, Heppelmann, S, Hirsch, A, Hoffmann, GW, Hofman, DJ, Horvat, S, Huang, B, Huang, X, Huang, HZ, Huck, P, and Humanic, TJ
Abstract: Balance functions have been measured in terms of relative pseudorapidity (Δη) for charged particle pairs at the BNL Relativistic Heavy Ion Collider from Au + Au collisions at sNN=7.7GeV to 200 GeV using the STAR detector. These results are compared with balance functions measured at the CERN Large Hadron Collider from Pb + Pb collisions at sNN=2.76TeV by the ALICE Collaboration. The width of the balance function decreases as the collisions become more central and as the beam energy is increased. In contrast, the widths of the balance functions calculated using shuffled events show little dependence on centrality or beam energy and are larger than the observed widths. Balance function widths calculated using events generated by UrQMD are wider than the measured widths in central collisions and show little centrality dependence. The measured widths of the balance functions in central collisions are consistent with the delayed hadronization of a deconfined quark gluon plasma (QGP). The narrowing of the balance function in central collisions at sNN=7.7 GeV implies that a QGP is still being created at this relatively low energy.
Published: 2016

2. STAR Collaboration

Author: Abdelwahab, NM, Adamczyk, L, Adkins, JK, Agakishiev, G, Aggarwal, MM, Ahammed, Z, Alekseev, I, Alford, J, Aparin, A, Arkhipkin, D, Aschenauer, EC, Averichev, GS, Banerjee, A, Beavis, DR, Bellwied, R, Bhasin, A, Bhati, AK, Bhattarai, P, Bielcik, J, Bielcikova, J, Bland, LC, Bordyuzhin, IG, Borowski, W, Bouchet, J, Brandin, AV, Bültmann, S, Bunzarov, I, Burton, TP, Butterworth, J, Caines, H, Calderón de la Barca Sánchez, M, Campbell, JM, Cebra, D, Cendejas, R, Cervantes, MC, Chaloupka, P, Chang, Z, Chattopadhyay, S, Chen, HF, Chen, JH, Chen, L, Cheng, J, Cherney, M, Christie, W, Chwastowski, J, Codrington, MJM, Contin, G, Cramer, JG, Crawford, HJ, Cui, X, Das, S, Davila Leyva, A, De Silva, LC, Debbe, RR, Dedovich, TG, Deng, J, Derevschikov, AA, Derradi de Souza, R, di Ruzza, B, Didenko, L, Dilks, C, Ding, F, Djawotho, P, Dong, X, Drachenberg, JL, Draper, JE, Du, CM, Dunkelberger, LE, Dunlop, JC, Efimov, LG, Engelage, J, Engle, KS, Eppley, G, Esha, R, Eun, L, Evdokimov, O, Eyser, O, Fatemi, R, Fazio, S, Federic, P, Fedorisin, J, Filip, P, Fisyak, Y, Flores, CE, Gagliardi, CA, Gangadharan, DR, Garand, D, Geurts, F, Gibson, A, Girard, M, Greiner, L, Grosnick, D, Gunarathne, DS, Guo, Y, Gupta, A, Gupta, S, Guryn, W, Hamad, A, Hamed, A, and Han, LX
Subjects: Nuclear & Particles Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Published: 2014

3. An Experimental Exploration of the QCD Phase Diagram: The Search for the Critical Point and the Onset of De-confinement

Author: STAR Collaboration, Aggarwal, M. M., Ahammed, Z., Alakhverdyants, A. V., Alekseev, I., Anderson, B. D., Arkhipkin, D., Averichev, G. S., Balewski, J., Barnby, L. S., Baumgart, S., Beavis, D. R., Bellwied, R., Betancourt, M. J., Betts, R. R., Bhasin, A., Bhati, A. K., Bichsel, H., Bielcik, J., Bielcikova, J., Biritz, B., Bland, L. C., Bonner, B. E., Bouchet, J., Braidot, E., Brandin, A. V., Bridgeman, A., Bruna, E., Bueltmann, S., Bunzarov, I., Burton, T. P., Cai, X. Z., Caines, H., CalderóndelaBarcaSánchez, M., Catu, O., Cebra, D., Cendejas, R., Cervantes, M. C., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., Chen, H. F., Chen, J. H., Chen, J. Y., Cheng, J., Cherney, M., Chikanian, A., Choi, K. E., Christie, W., Chung, P., Clarke, R. F., Codrington, M. J. M., Corliss, R., Cramer, J. G., Crawford, H. J., Das, D., Dash, S., DavilaLeyva, A., DeSilva, L. C., Debbe, R. R., Dedovich, T. G., Derevschikov, A. A., DerradideSouza, R., Didenko, L., Djawotho, P., Dogra, S. M., Dong, X., Drachenberg, J. L., Draper, J. E., Dunlop, J. C., DuttaMazumdar, M. R., Efimov, L. G., Elhalhuli, E., Elnimr, M., Engelage, J., Eppley, G., Erazmus, B., Estienne, M., Eun, L., Evdokimov, O., Fachini, P., Fatemi, R., Fedorisin, J., Fersch, R. G., Filip, P., Finch, E., Fine, V., Fisyak, Y., Gagliardi, C. A., Gangadharan, D. R., Ganti, M. S., Garcia, E. J., Solis, Geromitsos, A., Geurts, F., Ghazikhanian, V., Ghosh, P., Gorbunov, Y. N., Gordon, A., Grebenyuk, O., Grosnick, D., Guertin, S. M., Gupta, A., Gupta, N., Guryn, W., Haag, B., Hamed, A., Han, LX., Harris, J. W., HaysWehle, J. P., Heinz, M., Heppelmann, S., Hirsch, A., Hjort, E., Hoffman, A. M., Hoffmann, G. W., Hofman, D. J., Huang, B., Huang, H. Z., Humanic, T. J., Huo, L., Igo, G., Jacobs, P., Jacobs, W. W., Jena, C., Jin, F., Jones, C. L., Jones, P. G., Joseph, J., Judd, E. G., Kabana, S., Kajimoto, K., Kang, K., Kapitan, J., Kauder, K., Keane, D., Kechechyan, A., Kettler, D., Kikola, D. P., Kiryluk, J., Kisiel, A., Klein, S. R., Knospe, A. G., Kocoloski, A., Koetke, D. D., Kollegger, T., Konzer, J., Koralt, I., Koroleva, L., Korsch, W., Kotchenda, L., Kouchpil, V., Kravtsov, P., Krueger, K., Krus, M., Kumar, L., Kurnadi, P., Lamont, M. A. C., Landgraf, J. M., LaPointe, S., Lauret, J., Lebedev, A., Lednicky, R., Lee, H., Lee, J. H., Leight, W., LeVine, M. J., Li, C., Li, L., Li, N., Li, W., Li, X., Li, Y., Li, Z. M., Lin, G., Lindenbaum, S. J., Lisa, M. A., Liu, F., Liu, H., Liu, J., Ljubicic, T., Llope, W. J., Longacre, R. S., Love, W. A., Lu, Y., Luo, X., Ma, G. L., Ma, Y. G., Mahapatra, D. P., Majka, R., Mall, O. I., Mangotra, L. K., Manweiler, R., Margetis, S., Markert, C., Masui, H., Matis, H. S., Matulenko, Yu. A., McDonald, D., McShane, T. S., Meschanin, A., Milner, R., Minaev, N. G., Mioduszewski, S., Mischke, A., Mitrovski, M. K., Mohanty, B., Mondal, M. M., Morozov, B., Morozov, D. A., Munhoz, M. G., Nandi, B. K., Nattrass, C., Nayak, T. K., Nelson, J. M., Netrakanti, P. K., Ng, M. J., Nogach, L. V., Nurushev, S. B., Odyniec, G., Ogawa, A., Okorokov, V., Oldag, E. W., Olson, D., Pachr, M., Page, B. S., Pal, S. K., Pandit, Y., Panebratsev, Y., Pawlak, T., Peitzmann, T., Perevoztchikov, V., Perkins, C., Peryt, W., Phatak, S. C., Pile, P., Planinic, M., Ploskon, M. A., Pluta, J., Plyku, D., Poljak, N., Poskanzer, A. M., Potukuchi, B. V. K. S., Powell, C. B., Prindle, D., Pruneau, C., Pruthi, N. K., Pujahari, P. R., Putschke, J., Raniwala, R., Raniwala, S., Ray, R. L., Redwine, R., Reed, R., Ritter, H. G., Roberts, J. B., Rogachevskiy, O. V., Romero, J. L., Rose, A., Roy, C., Ruan, L., Sahoo, R., Sakai, S., Sakrejda, I., Sakuma, T., Salur, S., Sandweiss, J., Sangaline, E., Schambach, J., Scharenberg, R. P., Schmitz, N., Schuster, T. R., Seele, J., Seger, J., Selyuzhenkov, I., Seyboth, P., Shahaliev, E., Shao, M., Sharma, M., Shi, S. S., Sichtermann, E. P., Simon, F., Singaraju, R. N., Skoby, M. J., Smirnov, N., Sorensen, P., Sowinski, J., Spinka, H. M., Srivastava, B., Stanislaus, T. D. S., Staszak, D., Stevens, J. R., Stock, R., Strikhanov, M., Stringfellow, B., Suaide, A. A. P., Suarez, M. C., Subba, N. L., Sumbera, M., Sun, X. M., Sun, Y., Sun, Z., Surrow, B., Svirida, D. N., Symons, T. J. M., SzantodeToledo, A., Takahashi, J., Tang, A. H., Tang, Z., Tarini, L. H., Tarnowsky, T., Thein, D., Thomas, J. H., Tian, J., Timmins, A. R., Timoshenko, S., Tlusty, D., Tokarev, M., Tram, V. N., Trentalange, S., Tribble, R. E., Tsai, O. D., Ulery, J., Ullrich, T., Underwood, D. G., VanBuren, G., vanLeeuwen, M., vanNieuwenhuizen, G., Vanfossen, Jr., J. A., Varma, R., Vasconcelos, G. M. S., Vasiliev, A. N., Videbaek, F., Viyogi, Y. P., Vokal, S., Voloshin, S. A., Wada, M., Walker, M., Wang, F., Wang, G., Wang, H., Wang, J. S., Wang, Q., Wang, X. L., Wang, Y., Webb, G., Webb, J. C., Westfall, G. D., WhittenJr., C., Wieman, H., Wissink, S. W., Witt, R., Wu, Y. F., Xie, W., Xu, N., Xu, Q. H., Xu, W., Xu, Y., Xu, Z., Xue, L., Yang, Y., Yepes, P., Yip, K., Yoo, IK., Yue, Q., Zawisza, M., Zbroszczyk, H., Zhan, W., Zhang, J. B., Zhang, S., Zhang, W. M., Zhang, X. P., Zhang, Y., Zhang, Z. P., Zhao, J., Zhong, C., Zhou, J., Zhou, W., Zhu, X., Zhu, Y. H., Zoulkarneev, R., and Zoulkarneeva, Y.
Subjects: Nuclear Experiment
Abstract: The QCD phase diagram lies at the heart of what the RHIC Physics Program is all about. While RHIC has been operating very successfully at or close to its maximum energy for almost a decade, it has become clear that this collider can also be operated at lower energies down to 5 GeV without extensive upgrades. An exploration of the full region of beam energies available at the RHIC facility is imperative. The STAR detector, due to its large uniform acceptance and excellent particle identification capabilities, is uniquely positioned to carry out this program in depth and detail. The first exploratory beam energy scan (BES) run at RHIC took place in 2010 (Run 10), since several STAR upgrades, most importantly a full barrel Time of Flight detector, are now completed which add new capabilities important for the interesting physics at BES energies. In this document we discuss current proposed measurements, with estimations of the accuracy of the measurements given an assumed event count at each beam energy., Comment: 59 pages, 78 figures
Published: 2010

4. Beam-energy-dependent two-pion interferometry and the freeze-out eccentricity of pions measured in heavy ion collisions at the STAR detector

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BANERJEE, A, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CONTIN, G, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, EYSER, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GREINER, L, GROSNICK, D, GUNARATHNE, DS, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUANG, X, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOSARZEWSKI, LK, KOTCHENDA, L, KRAISHAN, AF, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LOMNITZ, M, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NIGMATKULOV, G, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLVITT, DL, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PONIATOWSKA, K, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, RUSNAKOVA, O, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, SZELEZNIAK, MA, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANDENBROUCKE, M, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, J, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, YU, N, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, JL, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, ZYZAK, M, Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), STAR, Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Adamczyk, L., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alekseev, I., Alford, J., Anson, C. D., Aparin, A., Arkhipkin, D., Aschenauer, E. C., Averichev, G. S., Banerjee, A., Beavis, D. R., Bellwied, R., Bhasin, A., Bhati, A. K., Bhattarai, P., Bichsel, H., Bielcik, J., Bielcikova, J., Bland, L. C., Bordyuzhin, I. G., Borowski, W., Bouchet, J., Brandin, A. V., Brovko, S. G., Bultmann, S., Bunzarov, I., Burton, T. P., Butterworth, J., Caines, H., Calderon De La Barca Sanchez, M., Cebra, D., Cendejas, R., Cervantes, M. C., Chaloupka, P., Chang, Z., Chattopadhyay, S., Chen, H. F., Chen, J. H., Chen, L., Cheng, J., Cherney, M., Chikanian, A., Christie, W., Chwastowski, J., Codrington, M. J. M., Contin, G., Cramer, J. G., Crawford, H. J., Cui, X., Das, S., Davila Leyva, A., De Silva, L. C., Debbe, R. R., Dedovich, T. G., Deng, J., Derevschikov, A. A., Derradi De Souza, R., Dhamija, S., Di Ruzza, B., Didenko, L., Dilks, C., Ding, F., Djawotho, P., Dong, X., Drachenberg, J. L., Draper, J. E., Du, C. M., Dunkelberger, L. E., Dunlop, J. C., Efimov, L. G., Engelage, J., Engle, K. S., Eppley, G., Eun, L., Evdokimov, O., Eyser, O., Fatemi, R., Fazio, S., Fedorisin, J., Filip, P., Finch, E., Fisyak, Y., Flores, C. E., Gagliardi, C. A., Gangadharan, D. R., Garand, D., Geurts, F., Gibson, A., Girard, M., Gliske, S., Greiner, L., Grosnick, D., Gunarathne, D. S., Guo, Y., Gupta, A., Gupta, S., Guryn, W., Haag, B., Hamed, A., Han, L. -X., Haque, R., Harris, J. W., Heppelmann, S., Hirsch, A., Hoffmann, G. W., Hofman, D. J., Horvat, S., Huang, B., Huang, H. Z., Huang, X., Huck, P., Humanic, T. J., Igo, G., Jacobs, W. W., Jang, H., Judd, E. G., Kabana, S., Kalinkin, D., Kang, K., Kauder, K., Ke, H. W., Keane, D., Kechechyan, A., Kesich, A., Khan, Z. H., Kikola, D. P., Kisel, I., Kisiel, A., Koetke, D. D., Kollegger, T., Konzer, J., Koralt, I., Kosarzewski, L. K., Kotchenda, L., Kraishan, A. F., Kravtsov, P., Krueger, K., Kulakov, I., Kumar, L., Kycia, R. A., Lamont, M. A. C., Landgraf, J. M., Landry, K. D., Lauret, J., Lebedev, A., Lednicky, R., Lee, J. H., Levine, M. J., Li, C., Li, W., Li, X., Li, Y., Li, Z. M., Lisa, M. A., Liu, F., Ljubicic, T., Llope, W. J., Lomnitz, M., Longacre, R. S., Luo, X., Ma, G. L., Ma, Y. G., Madagodagettige Don, D. M. M. D., Mahapatra, D. P., Majka, R., Margetis, S., Markert, C., Masui, H., Matis, H. S., Mcdonald, D., Mcshane, T. S., Minaev, N. G., Mioduszewski, S., Mohanty, B., Mondal, M. M., Morozov, D. A., Mustafa, M. K., Nandi, B. K., Nasim, M., Nayak, T. K., Nelson, J. M., Nigmatkulov, G., Nogach, L. V., Noh, S. Y., Novak, J., Nurushev, S. B., Odyniec, G., Ogawa, A., Oh, K., Ohlson, A., Okorokov, V., Oldag, E. W., Olvitt, D. L., Pachr, M., Page, B. S., Pal, S. K., Pan, Y. X., Pandit, Y., Panebratsev, Y., Pawlak, T., Pawlik, B., Pei, H., Perkins, C., Peryt, W., Pile, P., Planinic, M., Pluta, J., Poljak, N., Poniatowska, K., Porter, J., Poskanzer, A. M., Pruthi, N. K., Przybycien, M., Pujahari, P. R., Putschke, J., Qiu, H., Quintero, A., Ramachandran, S., Raniwala, R., Raniwala, S., Ray, R. L., Riley, C. K., Ritter, H. G., Roberts, J. B., Rogachevskiy, O. V., Romero, J. L., Ross, J. F., Roy, A., Ruan, L., Rusnak, J., Rusnakova, O., Sahoo, N. R., Sahu, P. K., Sakrejda, I., Salur, S., Sandweiss, J., Sangaline, E., Sarkar, A., Schambach, J., Scharenberg, R. P., Schmah, A. M., Schmidke, W. B., Schmitz, N., Seger, J., Seyboth, P., Shah, N., Shahaliev, E., Shanmuganathan, P. V., Shao, M., Sharma, B., Shen, W. Q., Shi, S. S., Shou, Q. Y., Sichtermann, E. P., Singaraju, R. N., Skoby, M. J., Smirnov, D., Smirnov, N., Solanki, D., Sorensen, P., Spinka, H. M., Srivastava, B., Stanislaus, T. D. S., Stevens, J. R., Stock, R., Strikhanov, M., Stringfellow, B., Sumbera, M., Sun, X., Sun, X. M., Sun, Y., Sun, Z., Surrow, B., Svirida, D. N., Symons, T. J. M., Szelezniak, M. A., Takahashi, J., Tang, A. H., Tang, Z., Tarnowsky, T., Thomas, J. H., Timmins, A. R., Tlusty, D., Tokarev, M., Trentalange, S., Tribble, R. E., Tribedy, P., Trzeciak, B. A., Tsai, O. D., Turnau, J., Ullrich, T., Underwood, D. G., Van Buren, G., Van Nieuwenhuizen, G., Vandenbroucke, M., Vanfossen, J. A., Varma, R., Vasconcelos, G. M. S., Vasiliev, A. N., Vertesi, R., Videbaek, F., Viyogi, Y. P., Vokal, S., Vossen, A., Wada, M., Wang, F., Wang, G., Wang, H., Wang, J. S., Wang, X. L., Wang, Y., Webb, G., Webb, J. C., Westfall, G. D., Wieman, H., Wissink, S. W., Witt, R., Wu, Y. F., Xiao, Z., Xie, W., Xin, K., Xu, H., Xu, J., Xu, N., Xu, Q. H., Xu, Y., Xu, Z., Yan, W., Yang, C., Yang, Y., Ye, Z., Yepes, P., Yi, L., Yip, K., Yoo, I. K., Yu, N., Zawisza, Y., Zbroszczyk, H., Zha, W., Zhang, J. B., Zhang, J. L., Zhang, S., Zhang, X. P., Zhang, Y., Zhang, Z. P., Zhao, F., Zhao, J., Zhong, C., Zhu, X., Zhu, Y. H., Zoulkarneeva, Y., and Zyzak, M.
Subjects: Nuclear and High Energy Physics, STAR, pions, Hadron, Nuclear Theory, Critical-Point, Relativistic Nuclear Collisions, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, 7. Clean energy, 01 natural sciences, Nuclear physics, Pion, heavy-ions, Pb+Pb Collisions, 0103 physical sciences, Bose-Einstein Correlations, 010306 general physics, Nuclear Experiment, Transverse-Momentum, Physics, 010308 nuclear & particles physics, Observable, Sps Energies, Qcd, NATURAL SCIENCES. Physics, PRIRODNE ZNANOSTI. Fizika, Coulomb Corrections, Quark–gluon plasma, Quark-Gluon Plasma, Transverse mass, Phase-Transition, Relativistic Heavy Ion Collider, STAR detector
Abstract: 27 pages; 28 figures ; see paper for full list of authors; International audience; We present results of analyses of two-pion interferometry in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5, 19.6, 27, 39, 62.4 and 200 GeV measured in the STAR detector as part of the RHIC Beam Energy Scan program. The extracted correlation lengths (HBT radii) are studied as a function of beam energy, azimuthal angle relative to the reaction plane, centrality, and transverse mass ($m_{T}$) of the particles. The azimuthal analysis allows extraction of the eccentricity of the entire fireball at kinetic freeze-out. The energy dependence of this observable is expected to be sensitive to changes in the equation of state. A new global fit method is studied as an alternate method to directly measure the parameters in the azimuthal analysis. The eccentricity shows a monotonic decrease with beam energy that is qualitatively consistent with the trend from all model predictions and quantitatively consistent with a hadronic transport model.
Published: 2015

5. Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in root s(NN)=200 GeV Au+Au collisions

Author: ABDELWAHAB, NM, ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BANERJEE, A, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CAMPBELL, JM, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CODRINGTON, MJM, CONTIN, G, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, EYSER, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GREINER, L, GROSNICK, D, GUNARATHNE, DS, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUANG, X, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOSARZEWSKI, LK, KOTCHENDA, L, KRAISHAN, AF, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LOMNITZ, M, LONGACRE, RS, LUO, X, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NIGMATKULOV, G, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLVITT, DL, PAGE, BS, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PONIATOWSKA, K, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUTSCHKE, J, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, RUSNAKOVA, O, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SIMKO, M, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, SZELEZNIAK, MA, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANDENBROUCKE, M, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, J, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, YU, N, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, JL, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Nonflow, Flow, Heavy-Ion, Relativistic Nuclear Collisions, Collective Flow
Abstract: A data-driven method was applied to Au+Au collisions at root S-NN = 200 GeV made with the STAR detector at RHIC to isolate pseudorapidity distance Delta eta-dependent and Delta eta-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a Delta eta-independent component of the correlation, which is dominated by anisotropic flow and flow fluctuations. It was also found to be independent of. within the measured range of pseudorapidity vertical bar eta vertical bar < 1. In 20-30% central Au+Au collisions, the relative flow fluctuation was found to be 34% +/- 2%(stat.) +/- 3%(sys.) for particles with transverse momentum p(T) less than 2 GeV/c. The Delta eta-dependent part, attributed to nonflow correlations, is found to be 5% +/- 2%(sys.) relative to the flow of the measured second harmonic cumulant at vertical bar Delta eta vertical bar > 0.7. (C) 2015 The Authors. Published by Elsevier B.V.
Published: 2015

6. Precision Measurement of the Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at root s=200 GeV

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BANERJEE, A, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CAMPBELL, JM, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CONTIN, G, CRAMER, JG, CRAWFORD, HJ, CUDD, AB, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, EYSER, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GREINER, L, GROSNICK, D, GUNARATHNE, DS, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUANG, X, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOSARZEWSKI, LK, KOTCHENDA, L, KRAISHAN, AF, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LOMNITZ, M, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NIGMATKULOV, G, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLVITT, DL, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PONIATOWSKA, K, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, RUSNAKOVA, O, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, SZELEZNIAK, MA, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANDENBROUCKE, M, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, J, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, YU, N, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, JL, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Parton Distributions, Uncertainties
Abstract: We report a new measurement of the midrapidity inclusive jet longitudinal double-spin asymmetry, A(LL), in polarized pp collisions at center-of-mass energy root s = 200 GeV. The STAR data place stringent constraints on polarized parton distribution functions extracted at next-to-leading order from global analyses of inclusive deep-inelastic scattering (DIS), semi-inclusive DIS, and RHIC pp data. The measured asymmetries provide evidence at the 3 sigma level for positive gluon polarization in the Bjorken-x region x > 0.05.
Published: 2015
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7. Charged-to-neutral correlation at forward rapidity in Au plus Au collisions at root s(NN)=200 GeV

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BANERJEE, A, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CAMPBELL, JM, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CONTIN, G, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, EYSER, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GREINER, L, GROSNICK, D, GUNARATHNE, DS, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUANG, X, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOSARZEWSKI, LK, KOTCHENDA, L, KRAISHAN, AF, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LOMNITZ, M, LONGACRE, RS, LUO, X, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NIGMATKULOV, G, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLVITT, DL, PAGE, BS, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PONIATOWSKA, K, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUTSCHKE, J, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, RUSNAKOVA, O, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SIMKO, M, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, SZELEZNIAK, MA, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANDENBROUCKE, M, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, J, XU, N, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, YU, N, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, JL, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Disoriented Chiral Condensate, Star Experiment, Time Projection Chamber, Perspective, Quark-Gluon Plasma, Search, Heavy-Ion Collisions, Fluctuations, Detector, Collaboration
Abstract: Event-by-event fluctuations of the multiplicities of inclusive charged particles and photons at forward rapidity in Au + Au collisions at root s(NN) = 200 GeV have been studied. The dominant contribution to such fluctuations is expected to come from correlated production of charged and neutral pions. We search for evidence of dynamical fluctuations of different physical origins. Observables constructed out of moments of multiplicities are used as measures of fluctuations. Mixed events and model calculations are used as base lines. Results are compared to the dynamical net-charge fluctuations measured in the same acceptance. A nonzero statistically significant signal of dynamical fluctuations is observed in excess to the model prediction when charged particles and photons are measured in the same acceptance. We find that, unlike dynamical net-charge fluctuation, charge-neutral fluctuation is not dominated by correlation owing to particle decay. Results are compared to the expectations based on the generic production mechanism of pions owing to isospin symmetry, for which no significant (
Published: 2015

8. Lambda Lambda Correlation Function in Au plus Au Collisions at root s(NN)=200 GeV

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BANERJEE, A, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCDLB, CAMPBELL, JM, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CONTIN, G, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, EYSER, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GREINER, L, GROSNICK, D, GUNARATHNE, DS, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUANG, X, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOSARZEWSKI, LK, KOTCHENDA, L, KRAISHAN, AF, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LOMNITZ, M, LONGACRE, RS, LUO, X, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NIGMATKULOV, G, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLVITT, DL, PAGE, BS, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PONIATOWSKA, K, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUTSCHKE, J, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, RUSNAKOVA, O, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SIMKO, M, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, SZELEZNIAK, MA, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANDENBROUCKE, M, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, J, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, YU, N, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, JL, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Particles, Dihyperon, Dibaryon, Hypernuclei, Search, Heavy-Ion Collisions, Femtoscopy, Stars
Abstract: We present Lambda Lambda correlation measurements in heavy-ion collisions for Au + Au collisions at root s(NN) = 200 GeV using the STAR experiment at the Relativistic Heavy-Ion Collider. The Lednicky-Lyuboshitz analytical model has been used to fit the data to obtain a source size, a scattering length and an effective range. Implications of the measurement of the Lambda Lambda correlation function and interaction parameters for dihyperon searches are discussed.
Published: 2015

9. Jet-Hadron Correlations in root s(NN)=200 GeV p plus p and Central Au plus Au Collisions

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BANERJEE, A, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CONTIN, G, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, EYSER, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GREINER, L, GROSNICK, D, GUNARATHNE, DS, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUANG, X, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOTCHENDA, L, KRAISHAN, AF, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LOMNITZ, M, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NIGMATKULOV, G, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLVITT, DL, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, RUSNAKOVA, O, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, SZELEZNIAK, MA, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANDENBROUCKE, M, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, J, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, YU, N, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, JL, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Star, Nucleus-Nucleus Collisions, Particle Suppression, Time Projection Chamber, Perspective, Quark-Gluon Plasma, Tev, Dependence, Collaboration, Transverse-Momentum
Abstract: Azimuthal angular correlations of charged hadrons with respect to the axis of a reconstructed (trigger) jet in Au + Au and p + p collisions at root s(NN) = 200 GeV in STAR are presented. The trigger jet population in Au + Au collisions is biased toward jets that have not interacted with the medium, allowing easier matching of jet energies between Au + Au and p + p collisions while enhancing medium effects on the recoil jet. The associated hadron yield of the recoil jet is significantly suppressed at high transverse momentum (p(T)(assoc)) and enhanced at low p(T)(assoc) in 0%-20% central Au + Au collisions compared to p + p collisions, which is indicative of medium-induced parton energy loss in ultrarelativistic heavy-ion collisions.
Published: 2014
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10. Energy dependence of moments of net-proton multiplicity distributions at RHIC

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BAMOVSKA, Z, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HE, CHEN, JH, CHEN, L, CHENG, J, CHEMEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, E, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFMUNOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, E, GIBSON, A, GIRARD, M, GLISKE, S, GROSNICK, D, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUNHOZ, MG, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PETERSON, A, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIMOV, D, SMIMOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TUMAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, E, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YE, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKAMEEVA, Y, and ZYZAK, M
Subjects: Particle physics, COLISÕES DE ÍONS PESADOS RELATIVÍSTICOS, Nuclear Theory, Hadron, FOS: Physical sciences, General Physics and Astronomy, Critical-Point, High Energy Physics - Experiment, Nuclear Theory (nucl-th), Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Lattice, Qcd Phase-Diagram, multiplicity, Fluctuations, Quantum Chromodynamics, Collisions, Nuclear Experiment (nucl-ex), Multiplicity (chemistry), Nuclear Experiment, Quantum chromodynamics, Physics, RHIC, High Energy Physics - Lattice (hep-lat), Sigma, Collaboration, NATURAL SCIENCES. Physics, PRIRODNE ZNANOSTI. Fizika, High Energy Physics - Phenomenology, Antiproton, Quark–gluon plasma, Transition, Perspective, Quark-Gluon Plasma, High Energy Physics::Experiment, Baryon number, energy, Relativistic Heavy Ion Collider, Model
Abstract: We report the beam energy (\sqrt s_{NN} = 7.7 - 200 GeV) and collision centrality dependence of the mean (M), standard deviation (\sigma), skewness (S), and kurtosis (\kappa) of the net-proton multiplicity distributions in Au+Au collisions. The measurements are carried out by the STAR experiment at midrapidity (|y| < 0.5) and within the transverse momentum range 0.4 < pT < 0.8 GeV/c in the first phase of the Beam Energy Scan program at the Relativistic Heavy Ion Collider. These measurements are important for understanding the Quantum Chromodynamic (QCD) phase diagram. The products of the moments, S\sigma and \kappa\sigma^{2}, are sensitive to the correlation length of the hot and dense medium created in the collisions and are related to the ratios of baryon number susceptibilities of corresponding orders. The products of moments are found to have values significantly below the Skellam expectation and close to expectations based on independent proton and anti-proton production. The measurements are compared to a transport model calculation to understand the effect of acceptance and baryon number conservation, and also to a hadron resonance gas model., Comment: 7 pages and 4 figures
Published: 2014

11. Event-plane-dependent dihadron correlations with harmonic v(n) subtraction in Au plus Au collisions at v root sNN=200 GeV

Author: AGAKISHIEV, H, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ANSON, CD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BEAVIS, DR, BEHERA, NK, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BIRITZ, B, BLAND, LC, BOROWSKI, W, BOUCHET, J, BRAIDOT, E, BRANDIN, AV, BRIDGEMAN, A, BROVKO, SG, BRUNA, E, BUELTMANN, S, BUNZAROV, I, BURTON, TP, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, P, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, DASH, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, ESTIENNE, M, EUN, L, EVDOKIMOV, O, FATEMI, R, FEDORISIN, J, FENG, A, FERSCH, RG, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GEROMITSOS, A, GEURTS, F, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, O, GROSNICK, D, GUERTIN, SM, GUPTA, A, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEINZ, M, HEPPELMANN, S, HIRSCH, A, HJORT, E, HOFFMANN, GW, HOFMAN, DJ, HUANG, B, HUANG, HZ, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, P, JACOBS, WW, JENA, C, JIN, F, JOSEPH, J, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, H, KEANE, D, KECHECHYAN, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KIZKA, V, KNOSPE, AG, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, N, LI, W, LI, X, LI, Y, LI, ZM, LISA, MA, LIU, F, LIU, H, LIU, J, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUKASHOV, EV, LUO, X, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MATULENKO, YA, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITROVSKI, MK, MOHANTY, B, MONDAL, MM, MOROZOV, B, MOROZOV, DA, MUNHOZ, MG, NAGLIS, M, NANDI, BK, NAYAK, TK, NETRAKANTI, PK, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEI, H, PEITZMANN, T, PERKINS, C, PERYT, W, PHATAK, SC, PILE, P, PLANINIC, M, PLOSKON, MA, PLUTA, J, PLYKU, D, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, POWELL, CB, PRINDLE, D, PRUTHI, NK, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, REDWINE, R, REED, R, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, RUAN, L, RUSNAK, J, SAHOO, NR, SAKAI, S, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STASZAK, D, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRAM, VN, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TSAI, OD, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, JB, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, J, ZHONG, C, ZHOU, W, ZHU, X, ZHU, YH, ZOULKARNEEV, R, and ZOULKARNEEVA, Y
Subjects: Perspective, Quark-Gluon Plasma, Relativistic Nuclear Collisions, Collaboration, Anisotropic Flow
Abstract: STAR measurements of dihadron azimuthal correlations (Lambda phi) are reported in midcentral (20-60%) Au + Au collisions at v root sNN = 200 GeV as a function of the trigger particle's azimuthal angle relative to the event plane, phi(s) = | phi(1) -psi(EP)|. The elliptic (v(2)), triangular (v(3)), and quadratic (v(4)) flow harmonic backgrounds are subtracted using the zero yield at mini + Au collisions. It is found that a finite near-side (| Delta phi | < pi/2) long-range pseudorapidity correlation (ridge) is present in the in-plane direction (phi(s) similar to 0). The away-side (| Delta phi | > pi/2) correlation shows a modification from d+ Au data, varying with fs. The modification may be a consequence of path-length-dependent jet quenching and may lead to a better understanding of high-density QCD.
Published: 2014

12. J/psi production at low p(T) in Au plus Au and Cu plus Cu collisions at root s(NN)=200 GeV with the STAR detector

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BANERJEE, A, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CAMPBELL, JM, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CONTIN, G, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, EYSER, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GREINER, L, GROSNICK, D, GUNARATHNE, DS, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUANG, X, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOSARZEWSKI, LK, KOTCHENDA, L, KRAISHAN, AF, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LOMNITZ, M, LONGACRE, RS, LUO, X, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NIGMATKULOV, G, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLVITT, DL, PAGE, BS, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PONIATOWSKA, K, PORTER, J, POSKANZER, AM, POWELL, CB, PRUTHI, NK, PRZYBYCIEN, M, PUTSCHKE, J, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, RUSNAKOVA, O, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SIMKO, M, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, SZELEZNIAK, MA, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANDENBROUCKE, M, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, J, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, YU, N, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, JL, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: System, Matter, Momentum Dependence, Quark-Gluon Plasma, Heavy-Ion Collisions, Particle Identification, Charmonium Production, Psi-Suppression, Energy Nuclear Collisions
Abstract: The J/psi p(T) spectrum and nuclear modification factor (R-AA) are reported for p(T) < 5 GeV/c and vertical bar y vertical bar < 1 from 0% to 60% central Au + Au and Cu + Cu collisions at root s(NN) = 200 GeV at STAR. A significant suppression of p(T) - integrated J/psi production is observed in central Au + Au events. The Cu + Cu data are consistent with no suppression, although the precision is limited by the available statistics. R-AA in Au + Au collisions exhibits a strong suppression at low transverse momentum and gradually increases with p(T). The data are compared to high-p(T) STAR results and previously published BNL Relativistic Heavy Ion Collider results. Comparing with model calculations, it is found that the invariant yields at low p(T) are significantly above hydrodynamic flow predictions but are consistent with models that include color screening and regeneration.
Published: 2014

13. Suppression of Upsilon production in d plus Au and Au plus Au collisions at root S-NN=200 GeV

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GROSNICK, D, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HILL, K, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUNHOZ, MG, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PETERSON, A, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WIMSATT, G, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, JL, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Nucleus Collisions, Relativistic Heavy-Ion Collisions, Star, Heavy-Ion Collisions, Lhc, Upsilon Suppression, Quarkonium In-Medium, J/Psi, Absorption
Abstract: We report measurements of Upsilon meson production in p + p, d + Au, and Au + Au collisions using the STAR detector at RHIC. We compare the Upsilon yield to the measured cross section in p + p collisions in order to quantify any modifications of the yield in cold nuclear matter using d + Au data and in hot nuclear matter using Au + Au data separated into three centrality classes. Our p + p measurement is based on three times the statistics of our previous result. We obtain a nuclear modification factor for Upsilon (1S + 2S + 3S) in the rapidity range vertical bar y vertical bar < 1 in d + Au collisions of R-dAu = 0.79 +/- 0.24(stat.) +/- 0.03(syst.) +/- 0.10(p + p syst.). A comparison with models including shadowing and initial state parton energy loss indicates the presence of additional cold-nuclear matter suppression. Similarly, in the top 10% most-central Au + Au collisions, we measure a nuclear modification factor of R-AA = 0.49 +/- 0.1(stat.) +/- 0.02(syst.) +/- 0.06(p + p syst.), which is a larger suppression factor than that seen in cold nuclear matter. Our results are consistent with complete suppression of excited-state Upsilon mesons in Au + Au collisions. The additional suppression in Au + Au is consistent with the level expected in model calculations that include the presence of a hot, deconfined Quark-Gluon Plasma. However, understanding the suppression seen in d + Au is still needed before any definitive statements about the nature of the suppression in Au + Au can be made. (C) 2014 The Authors. Published by Elsevier B.V.
Published: 2014
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14. Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at root s=200 GeV

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARBER, B, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BRIDGEMAN, A, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GROSNICK, D, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HAYS-WEHLE, JP, HE, W, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JENA, C, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MANWEILER, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOH, SY, NORD, PM, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PETERSON, A, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POCHRON, W, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHAUB, J, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Pi-0 Production, Star, Parton Distributions, Fragmentation, Plus P Collisions, Antiprotons, Qcd, Transverse-Momentum
Abstract: The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 < eta < 2.0 in polarized proton-proton collisions at root s = 200 GeV are presented. Neutral pions were detected using the end cap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 < p(T) < 16 GeV/c and is found to agree with a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry A(LL) is measured in the same pseudorapidity range and spans a range of Bjorken-x down to x approximate to 0.01. The measured A(LL) is consistent with model predictions for varying degrees of gluon polarization. The parity-violating asymmetry A(L) is also measured and found to be consistent with zero. The transverse single-spin asymmetry A(N) is measured over a previously unexplored kinematic range in Feynman-x and p(T). Such measurements may aid our understanding of the onset and kinematic dependence of the large asymmetries observed at more forward pseudorapidity (eta approximate to 3) and their underlying mechanisms. The A(N) results presented are consistent with a twist-3 model prediction of a small asymmetry over the present kinematic range.
Published: 2014
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15. Dielectron Mass Spectra from Au plus Au Collisions at root s(NN)=200 Ge V

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GROSNICK, D, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUANG, X, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUNHOZ, MG, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, JL, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Matter, Restoration, Perspective, Quark-Gluon Plasma, Heavy-Ion Collisions, Collaboration, Dileptons
Abstract: We report the STAR measurements of dielectron (e(+)e(-)) production at midrapidity (vertical bar y(ee)vertical bar < 1) in Au + Au collisions at root s(NN) = 200 GeV. The measurements are evaluated in different invariant mass regions with a focus on 0.30-0.76 (rho-like), 0.76-0.80 (omega-like), and 0.98-1.05 (phi-like) GeV/c(2). The spectrum in the omega-like and phi-like regions can be well described by the hadronic cocktail simulation. In the rho-like region, however, the vacuum rho spectral function cannot describe the shape of the dielectron excess. In this range, an enhancement of 1.77 +/- 0.11(stat) +/- 0.24(syst) +/- 0.33(cocktail) is determined with respect to the hadronic cocktail simulation that excludes the rho meson. The excess yield in the rho-like region increases with the number of collision participants faster than the omega and phi yields. Theoretical models with broadened rho contributions through interactions with constituents in the hot QCD medium provide a consistent description of the dilepton mass spectra for the measurement presented here and the earlier data at the Super Proton Synchrotron energies.
Published: 2014

16. Observation of D-0 Meson Nuclear Modifications in Au plus Au Collisions at root(NN)-N-s=200 GeV

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BANERJEE, A, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CONTIN, G, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, EYSER, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GREINER, L, GROSNICK, D, GUNARATHNE, DS, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUANG, X, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOTCHENDA, L, KRAISHAN, AF, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LOMNITZ, M, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NIGMATKULOV, G, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLVITT, DL, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, RUSNAKOVA, O, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, SZELEZNIAK, MA, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANDENBROUCKE, M, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, J, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, YU, N, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, JL, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Charm, Star, Qcd Matter, Spectra, Collaboration, Dynamics
Abstract: We report the first measurement of charmed-hadron (D-0) production via the hadronic decay channel (D-0 -> K- + pi(+)) in Au + Au collisions at root(NN)-N-s = 200 GeV with the STAR experiment. The charm production cross section per nucleon- nucleon collision at midrapidity scales with the number of binary collisions, N-bin, from p + p to central Au + Au collisions. The D-0 meson yields in central Au + Au collisions are strongly suppressed compared to those in p + p scaled by N-bin, for transverse momenta p(T) > 3 GeV/c, demonstrating significant energy loss of charm quarks in the hot and dense medium. An enhancement at intermediate p(T) is also observed. Model calculations including strong charm-medium interactions and coalescence hadronization describe our measurements.
Published: 2014

17. Beam Energy Dependence of Moments of the Net-Charge Multiplicity Distributions in Au plus Au Collisions at RHIC

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, EC, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GIRARD, M, GLISKE, S, GROSNICK, D, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JANG, H, JUDD, EG, KABANA, S, KALINKIN, D, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KHAN, ZH, KIKOLA, DP, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MINAEV, NG, MIODUSZEWSKI, S, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUNHOZ, MG, MUSTAFA, MK, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOH, SY, NOVAK, J, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PETERSON, A, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, WB, SCHMITZ, N, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHANMUGANATHAN, PV, SHAO, M, SHARMA, B, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUMBERA, M, SUN, X, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOSSEN, A, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YE, Z, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Star, Qcd, Point
Abstract: We report the first measurements of the moments-mean (M), variance (sigma(2)), skewness (S), and kurtosis (kappa)-of the net-charge multiplicity distributions at midrapidity in Au + Au collisions at seven energies, ranging from root s(NN) = 7.7 to 200 GeV, as a part of the Beam Energy Scan program at RHIC. The moments are related to the thermodynamic susceptibilities of net charge, and are sensitive to the location of the QCD critical point. We compare the products of the moments, sigma(2)/M, S sigma, and kappa sigma(2), with the expectations from Poisson and negative binomial distributions (NBDs). The S sigma values deviate from the Poisson baseline and are close to the NBD baseline, while the kappa sigma(2) values tend to lie between the two. Within the present uncertainties, our data do not show nonmonotonic behavior as a function of collision energy. These measurements provide a valuable tool to extract the freeze-out parameters in heavy-ion collisions by comparing with theoretical models.
Published: 2014

18. System-size dependence of transverse momentum correlations at root s(NN)=62.4 and 200 GeV at the BNL Relativistic Heavy Ion Collider

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BHATTARAI, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, FLORES, E, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GLISKE, S, GREBENYUK, OG, GROSNICK, D, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JENA, C, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KIKOLA, DP, KIRYLUK, J, KISEL, I, KISIEL, A, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Plus Pb Collisions, Signatures, Quark-Gluon Plasma, Au-Au Collisions, Mean-P(T) Fluctuations, By-Event Fluctuations, Nuclear Collisions, Ratio, Dynamics, Model
Abstract: We present a study of the average transverse momentum (p(t)) fluctuations and p(t) correlations for charged particles produced in Cu + Cu collisions at midrapidity for root s(NN) = 62.4 and 200 GeV. These results are compared with those published for Au + Au collisions at the same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the p(t) correlation results have been studied as functions of the collision centralities, the ranges in p(t), the pseudorapidity eta, and the azimuthal angle phi. The square root of the measured p(t) correlations when scaled by mean p(t) is found to be independent of both colliding beam energy and system size studied. Transport-based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jetlike correlations.
Published: 2013

19. Freeze-out dynamics via charged kaon femtoscopy in root sNN=200 GeV central Au plus Au collisions

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BHATTARAI, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GLISKE, S, GREBENYUK, G, GROSNICK, D, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JENA, C, JUDD, EG, KABANA, S, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KIKOLA, DP, KIRYLUK, J, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, YAN, YANG, C, YANG, Y, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Perspective, Quark-Gluon Plasma, Bose-Einstein Correlations, Collaboration
Abstract: We present measurements of three-dimensional correlation functions of like-sign, low-transverse-momentum kaon pairs from root sNN = 200 GeV Au + Au collisions. A Cartesian surface-spherical harmonic decomposition technique was used to extract the kaon source function. The latter was found to have a three-dimensional Gaussian shape and can be adequately reproduced by Therminator event-generator simulations with resonance contributions taken into account. Compared to the pion one, the kaon source function is generally narrower and does not have the long tail along the pair transverse momentum direction. The kaon Gaussian radii display a monotonic decrease with increasing transverse mass m(T) over the interval of 0.55
Published: 2013

20. Single spin asymmetry AN in polarized proton-proton elastic scattering at root s=200 GeV

Author: ADAMCZYK, L, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANSON, CD, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DIDENKO, L, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GEURTS, F, GIBSON, A, GLISKE, S, GORBUNOV, YN, GREBENYUK, OG, GROSNICK, D, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, WW, JENA, C, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KIKOLA, DP, KIRYLUK, J, KISEL, I, KISIEL, A, KIZKA, V, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MALL, OI, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MOROZOV, B, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, OSTROWSKI, P, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, Y, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Impact-Picture, Energy, 1st Measurement, Polarization, Region, Beam, A(N), Elastic Scattering, Pp, Interference, Pomeron
Abstract: We report a high precision measurement of the transverse single spin asymmetry A(N) at the center of mass energy root s = 200 GeV in elastic proton-proton scattering by the STAR experiment at RHIC. The A(N) was measured in the four-momentum transfer squared t range 0.003
Published: 2013
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21. Measurement of J/psi Azimuthal Anisotropy in Au plus Au Collisions at root s(NN)=200 GeV

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, FLORES, E, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GLISKE, S, GREBENYUK, OG, GROSNICK, D, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JENA, C, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KIKOLA, DP, KIRYLUK, J, KISEL, I, KISIEL, A, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Star, Models, Flow, Heavy-Ion Collisions, Quark Coalescence
Abstract: The measurement of J/psi azimuthal anisotropy is presented as a function of transverse momentum for different centralities in Au + Au collisions at root s(NN) = 200 GeV. The measured J/psi elliptic flow is consistent with zero within errors for transverse momentum between 2 and 10 GeV/c. Our measurement suggests that J/psi particles with relatively large transverse momenta are not dominantly produced by coalescence from thermalized charm quarks, when comparing to model calculations.
Published: 2013

22. Elliptic flow of identified hadrons in Au + Au collisions at root s(NN)=7.7-62.4 GeV

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, FLORES, E, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GLISKE, S, GREBENYUK, OG, GROSNICK, D, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JENA, C, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KIKOLA, DP, KIRYLUK, J, KISEL, I, KISIEL, A, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Star, Energy, Models, Quark-Gluon Plasma, Heavy-Ion Collisions, Anisotropy, Relativistic Nuclear Collisions, Strange Particles, Signature, Collaboration
Abstract: Measurements of the elliptic flow, upsilon(2), of identified hadrons (pi(+/-), K-+/-, K-s(0), p, (p) over bar, phi, Lambda, (Lambda) over bar, Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+)) in Au + Au collisions at root s(NN) = 7.7, 11.5, 19.6, 27, 39, and 62.4 GeV are presented. The measurements were done at midrapidity using the time-projection chamber and the time-of-flight detectors of the Solenoidal Tracker at RHIC experiment during the beam-energy scan program at Relativistic Heavy Ion Collider. A significant difference in the upsilon(2) values for particles and the corresponding antiparticles was observed at all transverse momenta for the first time. The difference increases with decreasing center-of-mass energy, root s(NN) (or increasing baryon chemical potential, mu(B)), and is larger for the baryons as compared to the mesons. This implies that particles and antiparticles are no longer consistent with the universal number-of-constituent quark (NCQ) scaling of upsilon(2) that was observed at root s(NN) = 200 GeV. However, for the selected group of particles (p(+), K+, K-s(0), p, Lambda, Xi(-), Omega(-)) NCQ scaling at (m(T) - m(0))/n(q) > 0.4 GeV/c(2) is not violated within +/- 10%. The upsilon(2) values for f mesons at 7.7 and 11.5 GeV are approximately two standard deviations from the trend defined by the other hadrons at the highest measured p(T) values.
Published: 2013

23. J/psi production at high transverse momenta in p plus p and Au plus Au collisions at root s(NN)=200 GeV

Author: ADAMCZYK, L, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANSON, CD, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHDYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DIDENKO, L, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GEURTS, F, GIBSON, A, GLISKE, S, GORBUNOV, YN, GREBENYUK, OG, GROSNICK, D, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, WW, JENA, C, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KIKOLA, DP, KIRYLUK, J, KISEL, I, KISIEL, A, KIZKA, V, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MALL, OI, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MOROZOV, B, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, OSTROWSKI, P, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, Y, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: J/Psi Suppression, D+Au Collisions, Star, Star Experiment, Quark-Gluon Plasma, Quarkonium, Heavy-Ion Collisions, P+P, Distributions, Detector, Proton, Flavor, Color-Screening
Abstract: We report J/psi spectra for transverse momenta P-T > 5 GeV/c at mid-rapidity in p + p and Au + Au collisions at root s(NN) = 200 GeV. The inclusive J/psi spectrum and the extracted B-hadron feed-down are compared to models incorporating different production mechanisms. We observe significant suppression of the J/psi yields for p(T) > 5 GeV/c in 0-30% central Au + Au collisions relative to the p + p yield scaled by the number of binary nucleon-nucleon collisions in Au + Au collisions. In 30-60% mid-central collisions, no such suppression is observed. The level of suppression is consistently less than that of high-p(T) pi(+/-) and low-p(T) J/psi at RHIC and high-p(T) J/psi at the LHC. (C) 2013 Elsevier B.V. All rights reserved.
Published: 2013

24. Fluctuations of charge separation perpendicular to the event plane and local parity violation in root S-NN=200 GeV Au + Au collisions at the BNL Relativistic Heavy Ion Collider

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALEKSEEV, I, ALFORD, J, ANSON, CD, APARIN, A, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BHATTARAI, P, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DI RUZZA, B, DIDENKO, L, DILKS, C, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, ENGLE, KS, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, FLORES, CE, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GLISKE, S, GREBENYUK, OG, GROSNICK, D, GUO, Y, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HAQUE, R, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JENA, C, JUDD, EG, KABANA, S, KANG, K, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KIKOLA, DP, KIRYLUK, J, KISEL, I, KISIEL, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, KYCIA, RA, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LUO, X, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, RAY, RL, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, ROY, A, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHEN, WQ, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VERTESI, R, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, YAN, W, YANG, C, YANG, Y, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, Y, ZBROSZCZYK, H, ZHA, W, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Hot Qcd, Collisions, Conservation
Abstract: Previous experimental results based on data (similar to 15 x 10(6) events) collected by the STAR detector at the BNL Relativistic Heavy Ion Collider suggest event-by-event charge-separation fluctuations perpendicular to the event plane in noncentral heavy-ion collisions. Here we present the correlator previously used split into its two component parts to reveal correlations parallel and perpendicular to the event plane. The results are from a high-statistics 200-GeV Au + Au collisions data set (57 x 10(6) events) collected by the STAR experiment. We explicitly count units of charge separation from which we find clear evidence for more charge-separation fluctuations perpendicular than parallel to the event plane. We also employ a modified correlator to study the possible P-even background in same- and opposite-charge correlations, and find that the P-even background may largely be explained by momentum conservation and collective motion.
Published: 2013

25. Third harmonic flow of charged particles in Au plus Au collisions at root s(NN)=200 GeV

Author: ADAMCZYK, L, ADKINS, JK, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANSON, CD, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BULTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, C, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, DAS, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DIDENKO, L, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, FLORES, E, GAGLIARDI, CA, GANGADHARAN, DR, GARAND, D, GEURTS, F, GIBSON, A, GLISKE, S, GORBUNOV, YN, GREBENYUK, OG, GROSNICK, D, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, IGO, G, JACOBS, WW, JENA, C, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KIKOLA, DP, KIRYLUK, J, KISEL, I, KISIEL, A, KIZKA, V, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KULAKOV, I, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LANDRY, KD, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MOROZOV, B, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NELSON, JM, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, OSTROWSKI, P, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, QUINTERO, A, RAMACHANDRAN, S, RANIWALA, R, RANIWALA, S, REDWINE, R, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, RUAN, L, RUSNAK, J, SAHOO, NR, SAHU, PK, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, L, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and ZYZAK, M
Subjects: Star, Time Projection Chamber, Model
Abstract: We report measurements of the third harmonic coefficient of the azimuthal anisotropy, upsilon(3), known as triangular flow. The analysis is for charged particles in Au + Au collisions at root s(NN) = 200 GeV, based on data from the STAR experiment at the BNL Relativistic Heavy Ion Collider. Two-particle correlations as a function of their pseudorapidity separation are fit with narrow and wide Gaussians. Measurements of triangular flow are extracted from the wide Gaussian, from two-particle cumulants with a pseudorapidity gap, and also from event plane analysis methods with a large pseudorapidity gap between the particles and the event plane. These results are reported as a function of transverse momentum and centrality. A large dependence on the pseudorapidity gap is found. Results are compared with other experiments and model calculations.
Published: 2013

26. Directed Flow of Identified Particles in Au plus Au Collisions at root S-NN=200 GeV at RHIC

Author: ADAMCZYK, L, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ANSON, CD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BUELTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DIDENKO, L, DING, F, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GEURTS, F, GLISKE, S, GORBUNOV, YN, GREBENYUK, OG, GROSNICK, D, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, WW, JENA, C, JOSEPH, J, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KIZKA, V, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MOROZOV, B, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NOGACH, LV, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, RUAN, L, RUSNAK, J, SAHOO, NR, SAKREJDA, I, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VIDEBK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, Y, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, and ZOULKARNEEVA, Y
Subjects: Gev Au+Au Collisions, Star, Perspective, Quark-Gluon Plasma, Heavy-Ion Collisions, Collective Flow, Transverse Flow, Collaboration, Anisotropic Flow
Abstract: STAR's measurements of directed flow (v(1)) around midrapidity for pi(+/-), K-+/-, K-S(0), p, and (p) over bar in Au + Au collisions at root s(NN) = 200 GeV are presented. A negative v(1) (y) slope is observed for most of produced particles (pi(+/-), K-+/-, K-S(0), p, and (p) over bar). In 5%-30% central collisions, a sizable difference is present between the v(1)(y) slope of protons and antiprotons, with the former being consistent with zero within errors. The v(1) excitation function is presented. Comparisons to model calculations (RQMD, UrQMD, AMPT, QGSM with parton recombination, and a hydrodynamics model with a tilted source) are made. For those models which have calculations of v(1) for both pions and protons, none of them can describe v(1()y) forpions and protons simultaneously. The hydrodynamics model with a tilted source as currently implemented cannot explain the centrality dependence of the difference between the v(1)(y) slopes of protons and antiprotons.
Published: 2012
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27. Strangeness Enhancement in Cu-Cu and Au-Au Collisions at root s(NN)=200 GeV

Author: AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ANSON, CD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARNBY, LS, BEAVIS, DR, BEHERA, NK, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRAIDOT, E, BRANDIN, AV, BRIDGEMAN, A, BROVKO, SG, BRUNA, E, BUELTMANN, S, BUNZAROV, I, BURTON, TP, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, P, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, ESTIENNE, M, EUN, L, EVDOKIMOV, O, FATEMI, R, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GEURTS, F, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, OG, GROSNICK, D, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEINZ, M, HEPPELMANN, S, HIRSCH, A, HJORT, E, HOFFMANN, GW, HOFMAN, DJ, HUANG, B, HUANG, HZ, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, P, JACOBS, WW, JENA, C, JIN, F, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KIZKA, V, KLEIN, SR, KNOSPE, AG, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, N, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LIU, H, LIU, J, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUKASHOV, EV, LUO, X, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANWEILER, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MOROZOV, B, MOROZOV, DA, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NAYAK, TK, NELSON, JM, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEI, H, PEITZMANN, T, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLOSKON, MA, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POTUKUCHI, BVKS, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, RUAN, L, RUSNAK, J, SAHOO, NR, SAKREJDA, I, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHAUB, J, SCHMAH, AM, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, JB, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, and ZOULKARNEEVA, Y
Subjects: Energy, Particle, Dependence
Abstract: We report new STAR measurements of midrapidity yields for the Lambda, (Lambda) over bar, K-S(0), Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+) particles in Cu + Cu collisions at root s(NN) = 200 GeV, and midrapidity yields for the Lambda, (Lambda) over bar, K-S(0) particles in Au + Au at root s(NN) = 200 GeV. We show that, at a given number of participating nucleons, the production of strange hadrons is higher in Cu + Cu collisions than in Au + Au collisions at the same center-of-mass energy. We find that aspects of the enhancement factors for all particles can be described by a parametrization based on the fraction of participants that undergo multiple collisions.
Published: 2012
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28. Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized p+p collisions at root s=200 GeV

Author: ADAMCZYK, L, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ANSON, CD, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BRIDGEMAN, A, BROVKO, SG, BRUNA, E, BUELTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DIDENKO, L, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GEURTS, F, GLISKE, S, GORBUNOV, YN, GREBENYUK, OG, GROSNICK, D, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, WW, JENA, C, JOSEPH, J, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KIZKA, V, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KOWALIK, K, KRAVTSOV, P, KRUEGER, K, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MALL, OI, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MILLANE, J, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MOROZOV, B, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, OSTROWSKI, P, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, RUAN, L, RUSNAK, J, SAHOO, NR, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SARSOUR, M, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STASZAK, D, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, Y, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, and ZOULKARNEEVA, Y
Subjects: Deep-Inelastic-Scattering, Structure-Function G(1)(N), Qcd Analysis, Star, Photoproduction, Proton, P Collisions, Q(2)-Dependence, Dependent Structure-Function, Nucleon
Abstract: We report STAR measurements of the longitudinal double-spin asymmetry A(LL), the transverse singlespin asymmetry A(N), and the transverse double-spin asymmetries A(Sigma) and A(TT) for inclusive jet production at mid-rapidity in polarized p + p collisions at a center-of-mass energy of root s = 200 GeV. The data represent integrated luminosities of 7.6 pb(-1) with longitudinal polarization and 1.8 pb(-1) with transverse polarization, with 50%-55% beam polarization, and were recorded in 2005 and 2006. No evidence is found for the existence of statistically significant jet A(N), A(Sigma), or A(TT) at mid-rapidity. Recent model calculations indicate the A(N) results may provide new limits on the gluon Sivers distribution in the proton. The asymmetry A(LL) significantly improves the knowledge of gluon polarization in the nucleon.
Published: 2012

29. rho(0) photoproduction in AuAu collisions at root s(NN)=62.4 GeV measured with the STAR detector

Author: AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ANSON, CD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BEAVIS, DR, BEHERA, NK, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRAIDOT, E, BRANDIN, AV, BRIDGEMAN, A, BROVKO, SG, BRUNA, E, BUELTMANN, S, BUNZAROV, I, BURTON, TP, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, P, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, ESTIENNE, M, EUN, L, EVDOKIMOV, O, FATEMI, R, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GEURTS, F, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, OG, GROSNICK, D, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEINZ, M, HEPPELMANN, S, HIRSCH, A, HJORT, E, HOFFMANN, GW, HOFMAN, DJ, HUANG, B, HUANG, HZ, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, P, JACOBS, WW, JENA, C, JIN, F, JOSEPH, J, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KIZKA, V, KLEIN, SR, KNOSPE, AG, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, N, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LIU, H, LIU, J, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUKASHOV, EV, LUO, X, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANWEILER, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MOROZOV, B, MOROZOV, DA, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NAYAK, TK, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEI, H, PEITZMANN, T, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLOSKON, MA, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POTUKUCHI, BVKS, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, RUAN, L, RUSNAK, J, SAHOO, NR, SAKREJDA, I, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHAUB, J, SCHMAH, AM, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, JB, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, and ZOULKARNEEVA, Y
Subjects: Hera, Physics, Time Projection Chamber, Heavy-Ion Collisions, Saturation
Abstract: Vector mesons may be photoproduced in relativistic heavy-ion collisions when a virtual photon emitted by one nucleus scatters from the other nucleus, emerging as a vector meson. The STAR Collaboration has previously presented measurements of coherent rho(0) photoproduction at center of mass energies of 130 GeV and 200 GeV in AuAu collisions. Here, we present a measurement of the cross section at 62.4 GeV; we find that the cross section for coherent rho(0) photoproduction with nuclear breakup is 10.5 +/- 1.5 +/- 1.6mb at 62.4 GeV. The cross-section ratio between 200 GeV and 62.4 GeV is 4.4 +/- 0.6, less than is predicted by most theoretical models. It is, however, proportionally much larger than the previously observed 15% +/- 55% increase between 130 GeV and 200 GeV.
Published: 2012
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30. Energy and system-size dependence of two- and four-particle nu(2) measurements in heavy-ion collisions at root S-NN=62.4 and 200 GeV and their implications on flow fluctuations and nonflow

Author: AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ANSON, CD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BEAVIS, DR, BEHERA, NK, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRAIDOT, E, BRANDIN, AV, BRIDGEMAN, A, BROVKO, SG, BRUNA, E, BUELTMANN, S, BUNZAROV, I, BURTON, TP, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, P, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, ESTIENNE, M, EUN, L, EVDOKIMOV, O, FATEMI, R, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GEURTS, F, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, OG, GROSNICK, D, GUPTA, A, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEINZ, M, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HUANG, B, HUANG, HZ, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, WW, JENA, C, JIN, F, JOSEPH, J, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KIZKA, V, KLEIN, SR, KNOSPE, AG, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, N, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LIU, H, LIU, J, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUKASHOV, EV, LUO, X, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANWEILER, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MOROZOV, B, MOROZOV, DA, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NAYAK, TK, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEI, H, PEITZMANN, T, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, REDWINE, R, REED, R, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, RUAN, L, RUSNAK, J, SAHOO, NR, SAKREJDA, I, SALUR, S, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHAUB, J, SCHMAH, AM, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DE SOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, JB, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, and ZOULKARNEEVA, Y
Subjects: Elliptic Flow, Relativistic Nuclear Collisions, Signature, Collaboration, Eccentricity Fluctuations
Abstract: We present STAR measurements of azimuthal anisotropy by means of the two- and four-particle cumulants nu(2) (nu(2){2} and nu(2){4}) for Au + Au and Cu + Cu collisions at center-of-mass energies root S-NN = 62.4 and 200 GeV. The difference between nu(2){2}(2) and nu(2){4}(2) is related to nu(2) fluctuations (sigma(nu 2)) and nonflow (delta(2)). We present an upper limit to sigma(nu 2)/nu 2. Following the assumption that eccentricity fluctuations sigma(epsilon) dominate nu(2) fluctuations nu(2)/sigma nu(2) approximate to epsilon/sigma epsilon we deduce the nonflow implied for several models of eccentricity fluctuations that would be required for consistency with nu(2){2} and nu(2){4}. We also present results on the ratio of nu(2) to eccentricity.
Published: 2012
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31. Di-electron spectrum at mid-rapidity in p+p collisions at root s=200 GeV

Author: ADAMCZYK, L, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ANSON, CD, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BUELTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCDLB, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHANG, Z, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DIDENKO, L, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GEURTS, F, GIBSON, A, GLISKE, S, GORBUNOV, YN, GREBENYUK, OG, GROSNICK, D, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, WW, JENA, C, JOSEPH, J, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KIZKA, V, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MALL, OI, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MONDAL, MM, MOROZOV, B, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, OSTROWSKI, P, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, RUAN, L, RUSNAK, J, SAHOO, NR, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, JR, JAV, VARMA, R, VASCONCELOS, GMS, VIDEBK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, JR, CW, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, Y, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, and ZOULKARNEEVA, Y
Subjects: D+Au Collisions, Star Experiment, Restoration, Perspective, Quark-Gluon Plasma, Particle Identification, Resistive Plate Chambers, Decays, Collaboration, Transverse-Momentum
Abstract: We report on the mid-rapidity mass spectrum of di-electrons and cross sections of pseudoscalar and vector mesons via e(+) e(-) decays, from root s = 200 GeV p + p collisions, measured by the large-acceptance experiment STAR at the Relativistic Heavy Ion Collider. The ratio of the di-electron continuum to the combinatorial background is larger than 10% over the entire mass range. Simulations of di-electrons from light-meson decays and heavy-flavor decays (charmonium and open charm correlation) are found to describe the data. The extracted omega -> e(+) e(-) invariant yields are consistent with previous measurements. The mid-rapidity yields (dN/dy) of phi and J/psi are extracted through their di-electron decay channels and are consistent with the previous measurements of phi -> K+ K- and J/psi -> e(+) e(-). Our results suggest a new upper limit of the branching ratio of the eta -> e(+) e(-) of 1.7 x 10(-5) at the 90% confidence level.
Published: 2012

32. Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV

Author: ADAMCZYK, L, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ANSON, CD, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANNERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BUELTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DIDENKO, L, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GEURTS, F, GLISKE, S, GORBUNOV, YN, GREBENYUK, OG, GROSNICK, D, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, WW, JENA, C, JOSEPH, J, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KIZKA, V, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MALL, OI, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MOROZOV, B, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, OSTROWSKI, P, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, RUAN, L, RUSNAK, J, SAHOO, NR, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, Y, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, and ZOULKARNEEVA, Y
Subjects: Fragmentation, Polarization, Gev/C, Beam
Abstract: Measurements of the differential cross section and the transverse single-spin asymmetry, A(N), vs x(F) for pi(0) and eta mesons are reported for 0.4 < x(F) < 0.75 at an average pseudorapidity of 3.68. A data sample of approximately 6.3 pb(-1) was analyzed, which was recorded during p(up arrow) + p collisions at root s = 200 GeV by the STAR experiment at RHIC. The average transverse beam polarization was 56%. The cross section for pi(0), including the previously unmeasured region of x(F) > 0.55, is consistent with a perturbative QCD prediction, and the eta/pi(0) cross-section ratio agrees with existing midrapidity measurements. For 0.55 < x(F) < 0.75, the average A(N) for eta is 0.210 +/- 0.056, and that for pi(0) is 0.081 +/- 0.016. The probability that these two asymmetries are equal is similar to 3%.
Published: 2012
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33. Measurements of D-0 and D* production in p plus p collisions at root s=200 GeV

Author: ADAMCZYK, L, AGAKISHIEV, G, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ANSON, CD, ARKHIPKIN, D, ASCHENAUER, E, AVERICHEV, GS, BALEWSKI, J, BANERJEE, A, BARNOVSKA, Z, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BORDYUZHIN, IG, BOROWSKI, W, BOUCHET, J, BRANDIN, AV, BROVKO, SG, BRUNA, E, BUELTMANN, S, BUNZAROV, I, BURTON, TP, BUTTERWORTH, J, CAI, XZ, CAINES, H, SANCHEZ, MCD, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHEN, L, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, P, CHWASTOWSKI, J, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, CUI, X, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DENG, J, DE SOUZA, RD, DHAMIJA, S, DIDENKO, L, DING, F, DION, A, DJAWOTHO, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, CM, DUNKELBERGER, LE, DUNLOP, JC, EFIMOV, LG, ELNIMR, M, ENGELAGE, J, EPPLEY, G, EUN, L, EVDOKIMOV, O, FATEMI, R, FAZIO, S, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GEURTS, F, GLISKE, S, GORBUNOV, YN, GREBENYUK, OG, GROSNICK, D, GUPTA, S, GURYN, W, HAAG, B, HAJKOVA, O, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEPPELMANN, S, HIRSCH, A, HOFFMANN, GW, HOFMAN, DJ, HORVAT, S, HUANG, B, HUANG, HZ, HUCK, P, HUMANIC, TJ, HUO, L, IGO, G, JACOBS, WW, JENA, C, JOSEPH, J, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAUDER, K, KE, HW, KEANE, D, KECHECHYAN, A, KESICH, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KIZKA, V, KLEIN, SR, KOETKE, DD, KOLLEGGER, T, KONZER, J, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KRAVTSOV, P, KRUEGER, K, KUMAR, L, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, W, LI, X, LI, Y, LI, ZM, LIMA, LM, LISA, MA, LIU, F, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LU, Y, LUO, X, LUSZCZAK, A, MA, GL, MA, YG, DON, DMMDM, MAHAPATRA, DP, MAJKA, R, MALL, OI, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MCDONALD, D, MCSHANE, TS, MIODUSZEWSKI, S, MITROVSKI, MK, MOHAMMED, Y, MOHANTY, B, MOROZOV, B, MUNHOZ, MG, MUSTAFA, MK, NAGLIS, M, NANDI, BK, NASIM, M, NAYAK, TK, NOGACH, LV, NOVAK, J, ODYNIEC, G, OGAWA, A, OH, K, OHLSON, A, OKOROKOV, V, OLDAG, EW, OLIVEIRA, RAN, OLSON, D, OSTROWSKI, P, PACHR, M, PAGE, BS, PAL, SK, PAN, YX, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PAWLIK, B, PEI, H, PERKINS, C, PERYT, W, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, PORTER, J, POSKANZER, AM, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PRZYBYCIEN, M, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RILEY, CK, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSS, JF, RUAN, L, RUSNAK, J, SAHOO, NR, SAKREJDA, I, SALUR, S, SANDACZ, A, SANDWEISS, J, SANGALINE, E, SARKAR, A, SCHAMBACH, J, SCHARENBERG, RP, SCHMAH, AM, SCHMIDKE, B, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SEYBOTH, P, SHAH, N, SHAHALIEV, E, SHAO, M, SHARMA, B, SHARMA, M, SHI, SS, SHOU, QY, SICHTERMANN, EP, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, D, SMIRNOV, N, SOLANKI, D, SORENSEN, P, DESOUZA, UG, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STEADMAN, SG, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TRIBEDY, P, TRZECIAK, BA, TSAI, OD, TURNAU, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, JR, JAV, VARMA, R, VASCONCELOS, GMS, VIDEBK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, VOSSEN, A, WADA, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, JR, CW, WIEMAN, H, WISSINK, SW, WITT, R, WITZKE, W, WU, YF, XIAO, Z, XIE, W, XIN, K, XU, H, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YI, Y, YIP, K, YOO, IK, ZAWISZA, M, ZBROSZCZYK, H, ZHANG, JB, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, F, ZHAO, J, ZHONG, C, ZHU, X, ZHU, YH, ZOULKARNEEVA, Y, and COLLABORATION, S
Subjects: Charm, Star, Electromagnetic Calorimeter, Hadronization
Abstract: We report measurements of charmed-hadron (D-0, D*) production cross sections at midrapidity in p + p collisions at a center-of-mass energy of 200 GeV by the STAR experiment. Charmed hadrons were reconstructed via the hadronic decays D-0 -> K- pi(+), D*(+) -> D-0 pi(+) -> K-pi(+)pi(+) and their charge conjugates, covering the p(T) range of 0.6-2.0 and 2.0-6.0 GeV/c for D-0 and D*(+), respectively. From this analysis, the charm-pair production cross section at midrapidity is d sigma/dy vertical bar(c (c) over bar)(y-0) = 170+/-45(stat)(-59)(+38()sys) mu b. The extracted charm-pair cross section is compared to perturbative QCD calculations. The transverse momentum differential cross section is found to be consistent with the upper bound of a fixed-order next-to-leading logarithm calculation.
Published: 2012

34. Measurement of the Bottom Quark Contribution to Nonphotonic Electron Production in p plus p Collisions at root s=200 GeV

Author: AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ANSON, D, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARNBY, LS, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, O, SAKREJDA, I, JONES, PG, JOSEPH, J, JUDD, EG, UNDERWOOD, DG, ZHOU, W, BIELCIKOVA, J, KABANA, S, BELLWIED, R, KAJIMOTO, K, KANG, K, KAPITAN, J, KAUDER, K, SAKUMA, T, KEANE, D, KECHECHYAN, A, ZHU, X, MA, GL, KETTLER, D, KIKOLA, DP, MATULENKO, YA, KIRYLUK, J, KISIEL, A, BETANCOURT, MJ, KIZKA, V, KLEIN, SR, SALUR, S, ZHU, YH, KNOSPE, AG, RAY, RL, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, MCDONALD, D, KORALT, I, KOROLEVA, L, KORSCH, W, ZOULKARNEEV, R, BETTS, RR, BRIDGEMAN, A, CAINES, H, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, KUMAR, L, MCSHANE, TS, ZOULKARNEEVA, Y, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, VAN BUREN, G, SANDWEISS, J, LAPOINTE, S, BHASIN, A, LAURET, J, LEBEDEV, A, LEDNICKY, R, MANGOTRA, LK, LEE, CH, LEE, JH, MESCHANIN, A, LEIGHT, W, VAN LEEUWEN, M, LEVINE, MJ, SANGALINE, E, LI, C, LI, L, LI, N, CHAJECKI, Z, BHATI, AK, LI, W, LI, X, LI, Y, VAN NIEUWENHUIZEN, G, MILNER, R, LI, ZM, LJUBICIC, T, LIN, G, CHALOUPKA, P, LIN, XY, LINDENBAUM, SJ, LISA, MA, LIU, F, BICHSEL, H, LIU, H, VANFOSSEN, JA, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, CHATTOPADHYAY, S, HEINZ, M, MITROVSKI, MK, GUPTA, A, MOHANTY, B, BIRITZ, B, MONDAL, MM, MOROZOV, B, VARMA, R, MOROZOV, DA, MUNHOZ, MG, ROSE, A, NANDI, BK, NATTRASS, C, SCHAMBACH, J, NAYAK, TK, NELSON, JM, GURYN, W, NETRAKANTI, PK, NG, MJ, VASCONCELOS, GMS, BLAND, LC, TRAINOR, TA, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, SCHARENBERG, RP, OKOROKOV, V, OLDAG, EW, OLSON, D, HAAG, B, HOFMAN, DJ, IGO, G, PACHR, M, PAGE, BS, PAL, SK, BONNER, BE, PANDIT, Y, PANEBRATSEV, Y, SCHMITZ, N, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, CHEN, HF, VASILIEV, AN, PERKINS, C, HAMED, A, PERYT, W, PHATAK, SC, PILE, P, PLANINIC, M, BOUCHET, J, SCHUSTER, TR, PLOSKON, MA, CHEN, JH, PLUTA, J, VIDEBAEK, F, PLYKU, D, POLJAK, N, POSKANZER, AM, HAN, LX, POTUKUCHI, BVKS, POWELL, CB, PRINDLE, D, PRUNEAU, C, CHEN, JY, SEELE, J, PRUTHI, NK, REDWINE, R, BRAIDOT, E, PUJAHARI, PR, PUTSCHKE, J, QIU, H, RANIWALA, R, HARRIS, JW, RANIWALA, S, CHENG, J, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, BIELCIK, J, BRUNA, E, LLOPE, WJ, SHAHALIEV, E, BAUMGART, S, SHAO, M, SHARMA, M, CHERNEY, M, SHI, SS, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, VIYOGI, YP, SKOBY, MJ, SMIRNOV, N, LONGACRE, RS, SORENSEN, P, BUELTMANN, S, CHIKANIAN, A, HEPPELMANN, S, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, VOKAL, S, STASZAK, D, STEVENS, JR, STOCK, R, LOVE, WA, MANWEILER, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, HIRSCH, A, BUNZAROV, I, SUAREZ, MC, SANCHEZ, MCD, SUBBA, NL, SUMBERA, M, SUN, XM, CHOI, KE, SUN, Y, LU, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, HJORT, E, VOLOSHIN, SA, DE TOLEDO, AS, BURTON, TP, CHRISTIE, W, TAKAHASHI, J, TANG, AH, TANG, Z, LUKASHOV, EV, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, WADA, M, TIAN, J, TRAM, VN, HOFFMAN, AM, TIMMINS, AR, TIMOSHENKO, S, CAI, XZ, TLUSTY, D, LUO, X, TOKAREV, M, WALKER, M, WANG, F, WANG, G, HAYS-WEHLE, JP, HUANG, B, REED, R, WANG, H, GROSNICK, D, WANG, JS, WANG, Q, WANG, XL, WANG, Y, CATU, O, WEBB, G, CHUNG, P, WEBB, JC, WESTFALL, GD, RITTER, HG, WHITTEN, C, HUANG, HZ, MA, YG, WIEMAN, H, WISSINK, SW, WITT, R, WU, YF, CLARKE, RF, XIE, W, XU, H, CEBRA, D, ROBERTS, JB, XU, N, XU, QH, XU, W, MAHAPATRA, DP, HUMANIC, TJ, XU, Y, JACOBS, P, XU, Z, XUE, L, YANG, Y, YEPES, P, BRANDIN, AV, YIP, K, YOO, IK, CENDEJAS, R, YUE, Q, MAJKA, R, CODRINGTON, MJM, ZAWISZA, M, HUO, L, ZBROSZCZYK, H, ZHAN, W, ZHANG, JB, ROGACHEVSKIY, OV, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, CORLISS, R, ZHANG, ZP, MALL, OI, CERVANTES, MC, ZHAO, J, BEAVIS, DR, ZHONG, C, ROMERO, JL, ZHOU, J, CRAMER, JG, CRAWFORD, HJ, DAS, D, MARGETIS, S, TRENTALANGE, S, DASH, S, LIU, J, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, JACOBS, WW, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, TRIBBLE, RE, DJAWOTHO, P, MARKERT, C, ROY, C, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DUNLOP, JC, MAZUMDAR, MRD, JENA, C, TSAI, OD, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, RUAN, L, MASUI, H, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, HOFFMANN, GW, EVDOKIMOV, O, FACHINI, P, JIN, F, FATEMI, R, SAHOO, R, FEDORISIN, J, MATIS, HS, FERSCH, RG, FILIP, P, FINCH, E, ULERY, J, FINE, V, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GANTI, MS, SAKAI, S, JONES, CL, GARCIA-SOLIS, EJ, GUERTIN, SM, GEROMITSOS, A, ULLRICH, T, and GEURTS, F
Subjects: High Energy Physics::Lattice, Nuclear Theory, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment, Tomography
Abstract: The contribution of B meson decays to nonphotonic electrons, which are mainly produced by the semileptonic decays of heavy-flavor mesons, in p + p collisions at root s = 200 GeV has been measured using azimuthal correlations between nonphotonic electrons and hadrons. The extracted B decay contribution is approximately 50% at a transverse momentum of p(T) >= 5 GeV/c. These measurements constrain the nuclear modification factor for electrons from B and D meson decays. The result indicates that B meson production in heavy ion collisions is also suppressed at high p(T).
Published: 2010

35. Azimuthal di-hadron correlations in d plus Au and Au plus Au collisions at root s(NN)=200 GeV measured at the STAR detector

Author: AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ALFORD, J, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARNBY, LS, BAUMGART, S, ZOULKARNEEVA, Y, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, MARGETIS, S, CHEN, JY, CHENG, J, CHERNEY, M, SAHOO, R, TRIBBLE, RE, HUO, L, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, P, CLARKE, RF, CODRINGTON, MJM, MARKERT, C, CORLISS, R, CRAMER, JG, TSAI, OD, HAYS-WEHLE, JP, CRAWFORD, HJ, DAS, D, IGO, G, DASH, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, MASUI, H, ULERY, J, DEREVSCHIKOV, AA, LJUBICIC, T, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, JACOBS, P, DONG, X, DRACHENBERG, JL, DRAPER, JE, ULLRICH, T, DUNLOP, JC, MATIS, HS, SAKAI, S, MAZUMDAR, MRD, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, ENGELAGE, J, EPPLEY, G, JACOBS, WW, UNDERWOOD, DG, ERAZMUS, B, ESTIENNE, M, EUN, L, SAKREJDA, I, MATULENKO, YA, EVDOKIMOV, O, FACHINI, P, FATEMI, R, FEDORISIN, J, FERSCH, RG, HOFFMANN, GW, FILIP, P, FINCH, E, JENA, C, FINE, V, SAKUMA, T, FISYAK, Y, MCDONALD, D, GAGLIARDI, CA, GANGADHARAN, DR, GANTI, MS, VAN BUREN, G, GARCIA-SOLIS, EJ, GEROMITSOS, A, GEURTS, F, GHAZIKHANIAN, V, GHOSH, P, SALUR, S, JIN, F, GORBUNOV, YN, GUPTA, A, GORDON, A, VAN LEEUWEN, M, GREBENYUK, O, GROSNICK, D, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, SANDWEISS, J, BETANCOURT, MJ, KABANA, S, KAJIMOTO, K, VAN NIEUWENHUIZEN, G, BIRITZ, B, KANG, K, KAPITAN, J, KAUDER, K, KEANE, D, KECHECHYAN, A, KETTLER, D, SANGALINE, E, KIKOLA, DP, KIRYLUK, J, MAHAPATRA, DP, BETTS, RR, KISIEL, A, MCSHANE, TS, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, SCHAMBACH, J, KONZER, J, RITTER, HG, KORALT, I, KOROLEVA, L, KORSCH, W, BHASIN, A, MESCHANIN, A, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, BRUNA, E, SANCHEZ, MCD, KRUS, M, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, MILNER, R, BHATI, AK, LAURET, J, LEBEDEV, A, VANFOSSEN, JA, SCHARENBERG, RP, LEDNICKY, R, LEE, CH, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, MINAEV, NG, LI, N, VARMA, R, BICHSEL, H, SCHMITZ, N, LI, W, LI, X, LI, Y, LI, ZM, LIN, G, LINDENBAUM, SJ, LISA, MA, VASCONCELOS, GMS, MIODUSZEWSKI, S, LIU, F, LLOPE, WJ, LIU, H, BIELCIK, J, LIU, J, MISCHKE, A, MITROVSKI, MK, MOHANTY, B, MONDAL, MM, VASILIEV, AN, GUPTA, N, MOROZOV, B, BLAND, LC, HEINZ, M, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, VIDEBAEK, F, NETRAKANTI, PK, NG, MJ, GURYN, W, NOGACH, LV, SCHUSTER, TR, NURUSHEV, SB, BONNER, BE, ODYNIEC, G, OGAWA, A, OKOROKOV, V, VIYOGI, YP, OLDAG, EW, OLSON, D, PACHR, M, PAGE, BS, HAAG, B, SEELE, J, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, BOUCHET, J, HOFMAN, DJ, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, SEGER, J, HAMED, A, PILE, P, PLANINIC, M, VOKAL, S, PLOSKON, MA, PLUTA, J, BRAIDOT, E, PLYKU, D, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, SELYUZHENKOV, I, POWELL, CB, HAN, LX, VOLOSHIN, SA, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUJAHARI, PR, PUTSCHKE, J, BRANDIN, AV, RANIWALA, R, RANIWALA, S, SEYBOTH, P, RAY, RL, ROBERTS, JB, REDWINE, R, HARRIS, JW, REED, R, SHAHALIEV, E, SHAO, M, SHARMA, M, BUELTMANN, S, LONGACRE, RS, SHI, SS, BEAVIS, DR, BIELCIKOVA, J, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SORENSEN, P, SOWINSKI, J, SPINKA, HM, LOVE, WA, SRIVASTAVA, B, WADA, M, BUNZAROV, I, HEPPELMANN, S, STANISLAUS, TDS, STASZAK, D, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, LU, Y, WALKER, M, SUAREZ, MC, SUBBA, NL, SUMBERA, M, HIRSCH, A, BURTON, TP, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, CATU, O, LUO, X, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, HJORT, E, TANG, Z, CAI, XZ, TARINI, LH, TARNOWSKY, T, WANG, F, THEIN, D, MA, GL, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, TLUSTY, D, HOFFMAN, AM, TOKAREV, M, TRAINOR, TA, WANG, G, CAINES, H, TRAM, VN, MA, YG, TRENTALANGE, S, WANG, H, WANG, JS, WANG, Q, HORNER, MJ, ROGACHEVSKIY, OV, WANG, XL, GUERTIN, SM, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, CEBRA, D, WHITTEN, C, WIEMAN, H, WISSINK, SW, ROMERO, JL, WITT, R, HUANG, B, MAJKA, R, WU, YF, XIE, W, XU, N, XU, QH, XU, W, XU, Y, CENDEJAS, R, ROSE, A, XU, Z, XUE, L, YANG, Y, MALL, OI, HUANG, HZ, YEPES, P, YIP, K, YOO, IK, YUE, Q, ZAWISZA, M, BRIDGEMAN, A, ZBROSZCZYK, H, ZHAN, W, CERVANTES, MC, ZHANG, JB, MANGOTRA, LK, ZHANG, S, HUMANIC, TJ, ZHANG, WM, ZHANG, XP, ZHANG, Y, ROY, C, ZHANG, ZP, ZHAO, J, ZHONG, C, ZHOU, J, ZHOU, W, MANWEILER, R, CHAJECKI, Z, ZHU, X, BELLWIED, R, ZHU, YH, RUAN, L, and ZOULKARNEEV, R
Subjects: Plasma, Radiation, Au+Au Collisions, Nuclear Experiment
Abstract: Yields, correlation shapes, and mean transverse momenta p(T) of charged particles associated with intermediate-to high-p(T) trigger particles (2.5 < p(T) < 10 GeV/c) in d + Au and Au + Au collisions at root s(NN) = 200 GeV are presented. For associated particles at higher p(T) greater than or similar to 2.5 GeV/c, narrow correlation peaks are seen in d + Au and Au + Au, indicating that the main production mechanism is jet fragmentation. At lower associated particle pT < 2 GeV/c, a large enhancement of the near- (Delta phi similar to 0) and away-side (Delta phi similar to pi) associated yields is found, together with a strong broadening of the away-side azimuthal distributions in Au + Au collisions compared to d + Au measurements, suggesting that other particle production mechanisms play a role. This is further supported by the observed significant softening of the away-side associated particle yield distribution at Delta phi similar to pi in central Au + Au collisions.
Published: 2010

36. gamma cross section in p plus p collisions at root s=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARNBY, LS, BAUMGART, S, BEAVIS, DR, GORDON, A, GREBENYUK, O, JACOBS, WW, JAKL, P, JENA, C, SAKUMA, T, JIN, F, BETTS, RR, JONES, CL, VAN LEEUWEN, M, ZOULKARNEEV, R, BLAND, LC, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, SALUR, S, KAPITAN, J, KAUDER, K, ZOULKARNEEVA, Y, MA, GL, KEANE, D, BHASIN, A, MATULENKO, YA, KECHECHYAN, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, SANDWEISS, J, CHATTOPADHYAY, S, KNOSPE, AG, REED, R, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, MCDONALD, D, BHATI, AK, KOPYTINE, M, KORALT, I, CHEN, HF, KORSCH, W, BUELTMANN, S, CATU, O, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, KUMAR, L, MCSHANE, TS, CHEN, JH, KURNADI, P, BICHSEL, H, LAMONT, MAC, VAN NIEUWENHUIZEN, G, SANGALINE, E, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, MANGOTRA, LK, LEE, CH, LEE, JH, MESCHANIN, A, LEIGHT, W, VANFOSSEN, JA, LEVINE, MJ, SCHAMBACH, J, BIELCIK, J, LI, C, LI, L, CHEN, JY, LI, N, LI, W, LI, X, LI, Y, VARMA, R, MILNER, R, LI, Z, LIU, H, LIN, G, CHENG, J, LINDENBAUM, SJ, BIELCIKOVA, J, LISA, MA, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, VASCONCELOS, GMS, MITROVSKI, MK, GUERTIN, SM, MOHANTY, B, CHERNEY, M, HAN, LX, BONNER, BE, MONDAL, MM, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, VASILIEV, AN, NAYAK, TK, NELSON, JM, ROY, C, NETRAKANTI, PK, GUPTA, A, SCHARENBERG, RP, NG, MJ, NOGACH, LV, BOUCHET, J, NURUSHEV, SB, ODYNIEC, G, VIDEBAEK, F, OGAWA, A, TRENTALANGE, S, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, SCHMITZ, N, GUPTA, N, PAGE, BS, PAL, SK, PANDIT, Y, HJORT, E, HUANG, HZ, BRAIDOT, E, PANEBRATSEV, Y, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, SCHUSTER, TR, PERYT, W, GURYN, W, PHATAK, SC, CHIKANIAN, A, VIYOGI, YP, PILE, P, PLANINIC, M, PLOSKON, MA, BRANDIN, AV, PLUTA, J, PLYKU, D, POLJAK, N, SEELE, J, POSKANZER, AM, CHOI, KE, POTUKUCHI, BVKS, VOKAL, S, HAAG, B, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUJAHARI, PR, BRIDGEMAN, A, PUTSCHKE, J, CHRISTIE, W, SEGER, J, RANIWALA, R, REHBERG, JM, RANIWALA, S, RAY, RL, HALLMAN, TJ, REDWINE, R, SELYUZHENKOV, I, SEYBOTH, P, SHAHALIEV, E, CHUNG, P, BUNZAROV, I, LIU, J, SHAO, M, BIRITZ, B, BELLWIED, R, SHARMA, M, SHI, SS, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, CLARKE, RF, SKOBY, MJ, SMIRNOV, N, SORENSEN, P, LJUBICIC, T, VOLOSHIN, SA, SOWINSKI, J, BURTON, TP, HARRIS, JW, SPINKA, HM, SRIVASTAVA, B, CODRINGTON, MJM, STANISLAUS, TDS, STASZAK, D, STEVENS, JR, STOCK, R, STRIKHANOV, M, WADA, M, LLOPE, WJ, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, MANWEILER, R, HAYS-WEHLE, JP, CAI, XZ, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, CEBRA, D, SUN, Z, LONGACRE, RS, SURROW, B, CORLISS, R, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, HEINZ, M, TANG, AH, CAINES, H, TANG, Z, WALKER, M, TARINI, LH, TARNOWSKY, T, COSENTINO, MR, LOVE, WA, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, HEPPELMANN, S, TLUSTY, D, WANG, F, TOKAREV, M, TRIBBLE, RE, SANCHEZ, MCDB, TRAINOR, TA, LU, Y, TRAM, VN, WANG, G, WANG, H, WANG, JS, HOFFMAN, AM, RITTER, HG, WANG, Q, HAMED, A, GROSNICK, D, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, CENDEJAS, R, WESTFALL, GD, WHITTEN, C, WIEMAN, H, ROBERTS, JB, CRAMER, JG, WINGFIELD, E, HOFFMANN, GW, MA, YG, WISSINK, SW, WITT, R, WU, Y, XIE, W, XU, N, XU, QH, CERVANTES, MC, CRAWFORD, HJ, ROGACHEVSKIY, OV, XU, W, XU, Y, XU, Z, MAHAPATRA, DP, HOFMAN, DJ, XUE, L, YANG, Y, YEPES, P, YIP, K, HUMANIC, TJ, YOO, IK, BRUNA, E, YUE, Q, ZAWISZA, M, CHAJECKI, Z, ZBROSZCZYK, H, MAJKA, R, ZHAN, W, HOLLIS, RS, ZHANG, S, DAS, D, ZHANG, WM, ZHANG, XP, ROMERO, JL, ZHANG, Y, ZHANG, ZP, ZHAO, J, ZHONG, C, ZHOU, J, MALL, OI, CHALOUPKA, P, DASH, S, ZHOU, W, BETANCOURT, MJ, ZHU, X, ROSE, A, ZHU, YH, LEYVA, AD, DE SILVA, LC, DEBBE, RR, MARGETIS, S, TSAI, OD, DEDOVICH, TG, LIU, F, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, HUO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, ULERY, J, DRACHENBERG, JL, MARKERT, C, RUAN, L, DRAPER, JE, DUNLOP, JC, MAZUMDAR, MRD, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, IGO, G, ULLRICH, T, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, SAHOO, R, MASUI, H, ESTIENNE, M, EUN, L, EVDOKIMOV, O, FACHINI, P, FATEMI, R, HIRSCH, A, FEDORISIN, J, FERSCH, RG, IORDANOVA, A, FILIP, P, SAKAI, S, FINCH, E, MATIS, HS, FINE, V, FISYAK, Y, GAGLIARDI, CA, UNDERWOOD, DG, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, EJ, GEROMITSOS, A, GEURTS, F, SAKREJDA, I, JACOBS, P, GHAZIKHANIAN, V, GRUBE, B, GHOSH, P, VAN BUREN, G, and GORBUNOV, YN
Subjects: Suppression, Nucleus-Nucleus Collisions, Resonances, Quark-Gluon Plasma, High Energy Physics::Experiment, J-Psi, Nuclear Experiment, Dimuon
Abstract: We report on a measurement of the gamma(1S + 2S + 3S) -> e(+)e(-) cross section at midrapidity in p + p collisions at root s = 200 GeV. We find the cross section to be 114 +/- 38(stat + fit)(-24)(+23)(syst) pb. Perturbative QCD calculations at next-to-leading order in the color evaporation model are in agreement with our measurement, while calculations in the color singlet model underestimate it by 2 sigma. Our result is consistent with the trend seen in world data as a function of the center-of-mass energy of the collision and extends the availability of gamma data to RHIC energies. The dielectron continuum in the invariant-mass range near the gamma is also studied to obtain a combined yield of e(+)e(-) pairs from the sum of the Drell-Yan process and b-(b) over bar production.
Published: 2010

37. Inclusive pi(0), eta, and direct photon production at high transverse momentum in p plus p and d plus Au collisions at root s(NN)=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUMGART, S, LISA, MA, LIU, F, LIU, H, LIU, J, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, BIELCIK, J, GROSNICK, D, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MASUI, H, GRUBE, B, BIELCIKOVA, J, MATIS, HS, MATULENKO, YA, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, GUERTIN, SM, MITROVSKI, MK, BIRITZ, B, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, GUPTA, A, NETRAKANTI, PK, NG, MJ, BLAND, LC, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, GUPTA, N, PACHR, M, PAGE, BS, PAL, SK, BONNER, BE, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, GURYN, W, PERYT, W, PHATAK, SC, PILE, P, PLANINIC, M, BOUCHET, J, PLOSKON, MA, PLUTA, J, PLYKU, D, POLJAK, N, POSKANZER, AM, HAAG, B, POTUKUCHI, BVKS, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, BRAIDOT, E, PUJAHARI, PR, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, HALLMAN, TJ, RAY, RL, REDWINE, R, REED, R, REHBERG, JM, RITTER, HG, ROBERTS, JB, BRANDIN, AV, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, HAMED, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKAI, S, SAKREJDA, I, SAKUMA, T, BRIDGEMAN, A, SALUR, S, SANDWEISS, J, HAN, LX, SANGALINE, E, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SELYUZHENKOV, I, BRUNA, E, SEYBOTH, P, BEAVIS, DR, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, BUELTMANN, S, HARRIS, JW, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STASZAK, D, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, HAYS-WEHLE, JP, BUNZAROV, I, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, HEINZ, M, DE TOLEDO, AS, BURTON, TP, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, HEPPELMANN, S, TIMMINS, AR, TIMOSHENKO, S, CAI, XZ, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, HIRSCH, A, ULERY, J, ULLRICH, T, UNDERWOOD, DG, CAINES, H, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, HJORT, E, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, SANCHEZ, MCD, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, HOFFMAN, AM, WANG, JS, WANG, Q, WANG, X, WANG, XL, WANG, Y, CATU, O, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, HOFFMANN, GW, WIEMAN, H, WINGFIELD, E, WISSINK, SW, WITT, R, WU, Y, XIE, W, CEBRA, D, XU, N, XU, QH, XU, W, HOFMAN, DJ, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YIP, K, YOO, IK, CENDEJAS, R, YUE, Q, ZAWISZA, M, HOLLIS, RS, ZBROSZCZYK, H, ZHAN, W, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, J, CERVANTES, MC, ZHONG, C, BELLWIED, R, ZHOU, J, ZHOU, W, ZHU, X, ZHU, YH, ZOULKARNEEV, R, ZOULKARNEEVA, Y, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, HUANG, HZ, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, P, CLARKE, RF, CODRINGTON, MJM, HUMANIC, TJ, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DEPHILLIPS, M, HUO, L, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DUNLOP, JC, MAZUMDAR, MRD, IGO, G, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, IORDANOVA, A, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, EJ, JACOBS, P, GEROMITSOS, A, GEURTS, F, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, O, JACOBS, WW, JAKL, P, JENA, C, JIN, F, BENEDOSSO, F, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, KAPITAN, J, KAUDER, K, KEANE, D, BETANCOURT, MJ, KECHECHYAN, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, BETTS, RR, KONZER, J, KOPYTINE, M, KORALT, I, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, KUMAR, L, BHASIN, A, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEE, JH, LEIGHT, W, BHATI, AK, LEVINE, MJ, LI, C, LI, L, LI, N, LI, W, LI, X, LI, Y, LI, Z, LIN, G, BICHSEL, H, and LINDENBAUM, SJ
Subjects: D+Au Collisions, Barrel Electromagnetic Calorimeter, Star, Fragmentation, Physics, Time Projection Chamber, Heavy-Ion Collisions, Distributions, High Energy Physics::Experiment, Leading Order, Hadron-Production, Nuclear Experiment
Abstract: We report a measurement of high-p(T) inclusive pi(0), eta, and direct photon production in p + p and d + Au collisions at root s(NN) = 200 GeV at midrapidity (0 < eta < 1). Photons from the decay pi(0) -> gamma gamma were detected in the barrel electromagnetic calorimeter of the STAR experiment at the Relativistic Heavy Ion Collider. The eta -> gamma gamma decay was also observed and constituted the first eta measurement by STAR. The first direct photon cross-section measurement by STAR is also presented; the signal was extracted statistically by subtracting the pi(0), eta, and omega(782) decay background from the inclusive photon distribution observed in the calorimeter. The analysis is described in detail, and the results are found to be in good agreement with earlier measurements and with next-to-leading-order perturbative QCD calculations.
Published: 2010

38. Charged and strange hadron elliptic flow in Cu plus Cu collisions at root s(NN)=62.4 and 200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARNBY, LS, BAUMGART, S, GARCIA-SOLIS, EJ, GRUBE, B, GEROMITSOS, A, ULERY, J, GEURTS, F, BEAVIS, DR, BETTS, RR, KETTLER, D, KIKOLA, DP, WANG, F, ZHAO, J, ROMERO, JL, SAKUMA, T, ZHU, YH, KIRYLUK, J, RAY, RL, KISIEL, A, KLEIN, SR, SHAHALIEV, E, KNOSPE, AG, KOCOLOSKI, A, BELLWIED, R, MIODUSZEWSKI, S, MATULENKO, YA, KOETKE, DD, MUNHOZ, MG, KOLLEGGER, T, KONZER, J, ZOULKARNEEV, R, BHASIN, A, BRUNA, E, SHAO, M, ZHONG, C, SANCHEZ, MCD, PUJAHARI, PR, KOPYTINE, M, KORALT, I, KOROLEVA, L, KORSCH, W, NANDI, BK, KOTCHENDA, L, KOUCHPIL, V, MCDONALD, D, ROGACHEVSKIY, OV, ZOULKARNEEVA, Y, CHIKANIAN, A, HAN, LX, KRAVTSOV, P, KRUEGER, K, KRUS, M, UNDERWOOD, DG, SALUR, S, KUMAR, L, SANGALINE, E, ZHOU, J, BHATI, AK, KURNADI, P, LAMONT, MAC, HOFFMANN, GW, SHARMA, M, LANDGRAF, JM, MALL, OI, LAPOINTE, S, LAURET, J, MCSHANE, TS, BLAND, LC, LEBEDEV, A, VAN BUREN, G, NATTRASS, C, LEDNICKY, R, REED, R, SANDWEISS, J, SHI, SS, LEE, CH, LEE, JH, LEIGHT, W, CRAWFORD, HJ, CHALOUPKA, P, BICHSEL, H, LEVINE, MJ, LI, C, LI, L, WANG, G, NAYAK, TK, LI, N, LI, Z, VAN LEEUWEN, M, DAS, D, MESCHANIN, A, LI, W, LIU, F, LI, X, CHATTOPADHYAY, S, GROSNICK, D, GUPTA, A, NELSON, JM, NETRAKANTI, PK, DASH, S, ULLRICH, T, VARMA, R, GORBUNOV, YN, BONNER, BE, TLUSTY, D, NG, MJ, NOGACH, LV, WANG, H, NURUSHEV, SB, ODYNIEC, G, SELYUZHENKOV, I, SCHAMBACH, J, OGAWA, A, SHI, XH, OKADA, H, OKOROKOV, V, GORDON, A, GUPTA, N, HOFFMAN, AM, WANG, JS, HUMANIC, TJ, TIAN, J, OLSON, D, PACHR, M, PAGE, BS, BOUCHET, J, SICHTERMANN, EP, PAL, SK, PANDIT, Y, SCHARENBERG, RP, GREBENYUK, O, JUDD, EG, LU, Y, PANEBRATSEV, Y, PAWLAK, T, PEITZMANN, T, CHEN, JH, VASCONCELOS, GMS, PEREVOZTCHIKOV, V, VIDEBAEK, F, GURYN, W, PERKINS, C, PERYT, W, MANWEILER, R, WANG, Q, PHATAK, SC, SAKAI, S, PILE, P, BRAIDOT, E, SCHMITZ, N, PLANINIC, M, CHEN, JY, SIMON, F, PLOSKON, MA, TRAM, VN, VASILIEV, AN, WANG, XL, PLUTA, J, PLYKU, D, POLJAK, N, JAKL, P, HAAG, B, POSKANZER, AM, POTUKUCHI, BVKS, POWELL, CB, LEYVA, AD, SINGARAJU, RN, PRINDLE, D, PUTSCHKE, J, CHENG, J, SCHUSTER, TR, PRUNEAU, C, REDWINE, R, BRANDIN, AV, JENA, C, PRUTHI, NK, LISA, MA, LIU, J, SKOBY, MJ, BUNZAROV, I, CHEN, HF, CHOI, KE, LIN, G, HAYS-WEHLE, JP, ZHOU, W, SMIRNOV, N, SORENSEN, P, DE SILVA, LC, SOWINSKI, J, SPINKA, HM, VIYOGI, YP, SRIVASTAVA, B, CEBRA, D, STANISLAUS, TDS, STASZAK, D, BIELCIK, J, LJUBICIC, T, MANGOTRA, LK, DEBBE, RR, BIRITZ, B, STEVENS, JR, STOCK, R, STRIKHANOV, M, HEINZ, M, WANG, Y, BURTON, TP, STRINGFELLOW, B, CATU, O, LINDENBAUM, SJ, MOHANTY, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, JONES, CL, CHRISTIE, W, SUMBERA, M, CLARKE, RF, LLOPE, WJ, SUN, XM, SUN, Y, DEDOVICH, TG, SUN, Z, VAN NIEUWENHUIZEN, G, SURROW, B, HEPPELMANN, S, VOKAL, S, SVIRIDA, DN, BETANCOURT, MJ, WEBB, G, CAI, XZ, CHUNG, P, DEPHILLIPS, M, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, MILNER, R, LONGACRE, RS, TANG, AH, TANG, Z, TARINI, LH, WEBB, JC, TARNOWSKY, T, CAINES, H, JONES, PG, VOLOSHIN, SA, THEIN, D, TOKAREV, M, HIRSCH, A, MINAEV, NG, THOMAS, JH, REHBERG, JM, WESTFALL, GD, HOFMAN, DJ, JIN, F, KABANA, S, RANIWALA, R, MA, GL, GHAZIKHANIAN, V, WHITTEN, C, WIEMAN, H, WINGFIELD, E, WISSINK, SW, CODRINGTON, MJM, WITT, R, IGO, G, WU, Y, CENDEJAS, R, HAMED, A, RITTER, HG, SAKREJDA, I, HARRIS, JW, XIE, W, XU, N, XU, QH, MA, YG, DEREVSCHIKOV, AA, HOLLIS, RS, XU, W, HUO, L, RANIWALA, S, XU, Y, XU, Z, XUE, L, MISCHKE, A, KAJIMOTO, K, YANG, Y, KAPITAN, J, BRIDGEMAN, A, YEPES, P, YIP, K, CERVANTES, MC, CHERNEY, M, YOO, IK, MAHAPATRA, DP, CORLISS, R, YUE, Q, GUERTIN, SM, DE SOUZA, RD, HUANG, HZ, KANG, K, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, SEELE, J, ROBERTS, JB, ZHANG, S, ZHANG, WM, ZHANG, XP, DIDENKO, L, ZHANG, Y, MITROVSKI, MK, CRAMER, JG, ZHANG, ZP, ZHU, X, MAJKA, R, SEGER, J, CHAJECKI, Z, TRENTALANGE, S, DJAWOTHO, P, MARGETIS, S, MONDAL, MM, TIMMINS, AR, ROSE, A, LI, Y, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, KAUDER, K, DUNLOP, JC, MAZUMDAR, MRD, IORDANOVA, A, LOVE, WA, TRIBBLE, RE, VANFOSSEN, JA, BIELCIKOVA, J, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, ROY, C, MARKERT, C, ENGELAGE, J, MATIS, HS, TIMOSHENKO, S, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, BUELTMANN, S, MOROZOV, B, EUN, L, HJORT, E, EVDOKIMOV, O, FACHINI, P, JACOBS, P, JOSEPH, J, FATEMI, R, RUAN, L, KEANE, D, FEDORISIN, J, LIU, H, MASUI, H, MOROZOV, DA, FERSCH, RG, FILIP, P, FINCH, E, WADA, M, TSAI, OD, FINE, V, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, SEYBOTH, P, KECHECHYAN, A, GANTI, MS, GHOSH, P, SAHOO, R, WALKER, M, and JACOBS, WW
Subjects: Phi-Meson Production, Centrality Dependence, Star, Quark-Gluon Plasma, Heavy-Ion Collisions, High Energy Physics::Experiment, Phase-Transition, Relativistic Nuclear Collisions, Nuclear Experiment, Signature, Collaboration, Anisotropic Flow
Abstract: We present the results of an elliptic flow, v(2), analysis of Cu + Cu collisions recorded with the solenoidal tracker detector (STAR) at the BNL Relativistic Heavy Ion Collider at root s(NN) = 62.4 and 200 GeV. Elliptic flow as a function of transverse momentum, v(2)(p(T)), is reported for different collision centralities for charged hadrons h(+/-) and strangeness-ontaining hadrons K-S(0), Lambda, Xi, and phi in the midrapidity region vertical bar eta vertical bar < 1.0. Significant reduction in systematic uncertainty of the measurement due to nonflow effects has been achieved by correlating particles at midrapidity, vertical bar eta vertical bar < 1.0, with those at forward rapidity, 2.5 < vertical bar eta vertical bar < 4.0. We also present azimuthal correlations in p + p collisions at root s = 200 GeV to help in estimating nonflow effects. To study the system-size dependence of elliptic flow, we present a detailed comparison with previously published results from Au + Au collisions at root s(NN) = 200 GeV. We observe that v(2)(p(T)) of strange hadrons has similar scaling properties as were first observed in Au + Au collisions, that is, (i) at low transverse momenta, p(T) < 2 GeV/c, v(2) scales with transverse kinetic energy, m(T) - m, and (ii) at intermediate p(T), 2 < p(T) < 4 GeV/c, it scales with the number of constituent quarks, n(q.) We have found that ideal hydrodynamic calculations fail to reproduce the centrality dependence of v(2)(p(T)) for K-S(0) and Lambda. Eccentricity scaled v(2) values, v(2)/epsilon, are larger in more central collisions, suggesting stronger collective flow develops in more central collisions. The comparison with Au + Au collisions, which go further in density, shows that v(2)/epsilon depends on the system size, that is, the number of participants N-part. This indicates that the ideal hydrodynamic limit is not reached in Cu + Cu collisions, presumably because the assumption of thermalization is not attained.
Published: 2010

39. Spectra of identified high-p(T) pi(+/-) and p((p)over-bar ) in Cu + Cu collisions at root s(NN)=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARNBY, LS, BAUMGART, S, BEAVIS, DR, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, HAN, LX, BELLWIED, R, HARRIS, JW, HAYS-WEHLE, JP, HEINZ, M, HEPPELMANN, S, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, BENEDOSSO, F, HUANG, HZ, HUMANIC, TJ, HUO, L, IGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKL, P, JENA, C, JIN, F, BETANCOURT, MJ, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, KAPITAN, J, KAUDER, K, KEANE, D, BETTS, RR, KECHECHYAN, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, BHASIN, A, KONZER, J, KOPYTINE, M, KORALT, I, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, KUMAR, L, BHATI, AK, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEE, JH, LEIGHT, W, BICHSEL, H, LEVINE, MJ, LI, C, LI, L, LI, N, LI, W, LI, X, LI, Y, LI, Z, LIN, G, BIELCIK, J, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, BIELCIKOVA, J, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MASUI, H, BIRITZ, B, MATIS, HS, MATULENKO, YA, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITROVSKI, MK, BLAND, LC, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NG, MJ, BONNER, BE, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, BOUCHET, J, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PILE, P, PLANINIC, M, BRAIDOT, E, PLOSKON, MA, PLUTA, J, PLYKU, D, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, BRANDIN, AV, PUJAHARI, PR, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, REHBERG, JM, RITTER, HG, ROBERTS, JB, BRIDGEMAN, A, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKAI, S, SAKREJDA, I, SAKUMA, T, BRUNA, E, SALUR, S, SANDWEISS, J, SANGALINE, E, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SELYUZHENKOV, I, BUELTMANN, S, SEYBOTH, P, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, BUNZAROV, I, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STASZAK, D, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, BURTON, TP, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, CAI, XZ, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, CAINES, H, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, SANCHEZ, MCD, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, CATU, O, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, X, WANG, XL, WANG, Y, CEBRA, D, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WINGFIELD, E, WISSINK, SW, WITT, R, WU, Y, XIE, W, CENDEJAS, R, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YIP, K, YOO, IK, CERVANTES, MC, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, J, CHAJECKI, Z, ZHONG, C, ZHOU, J, ZHOU, W, ZHU, X, ZHU, YH, ZOULKARNEEV, R, ZOULKARNEEVA, Y, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, P, CLARKE, RF, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DUNLOP, JC, MAZUMDAR, MRD, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, EVDOKIMOV, O, FACHINI, P, FATEMI, R, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, EJ, GEROMITSOS, A, GEURTS, F, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GORDON, A, and GREBENYUK, O
Subjects: D+Au Collisions, Large Transverse-Momentum, High Energy Physics::Phenomenology, Nuclear Theory, Jets, Quark, P+P, High Energy Physics::Experiment, Hadrons, Nuclear Experiment
Abstract: We report new results on identified (anti) proton and charged pion spectra at large transverse momenta (3 < p(T) < 10 GeV/c) from Cu + Cu collisions at root s(NN) = 200 GeV using the STAR detector at the Relativistic Heavy Ion Collider (RHIC). This study explores the system size dependence of two novel features observed at RHIC with heavy ions: the hadron suppression at high-p(T) and the anomalous baryon to meson enhancement at intermediate transverse momenta. Both phenomena could be attributed to the creation of a new form of QCD matter. The results presented here bridge the system size gap between the available pp and Au + Au data, and allow for a detailed exploration of the onset of the novel features. Comparative analysis of all available 200 GeV data indicates that the system size is a major factor determining both the magnitude of the hadron spectra suppression at large transverse momenta and the relative baryon to meson enhancement.
Published: 2010

40. Longitudinal scaling property of the charge balance function in Au plus Au collisions at root s(NN)=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ALEKSEEV, I, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARNBY, LS, BAUMGART, S, BEAVIS, DR, BELLWIED, R, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BIRITZ, B, BLAND, LC, BONNER, BE, BOUCHET, J, BRAIDOT, E, BRANDIN, AV, BRIDGEMAN, A, BRUNA, E, BUELTMANN, S, BUNZAROV, I, BURTON, TP, CAI, XZ, CAINES, H, SANCHEZ, MCD, CATU, O, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, P, CLARKE, RF, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DUNLOP, JC, MAZUMDAR, MRD, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, EVDOKIMOV, O, FACHINI, P, FATEMI, R, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, EJ, GEROMITSOS, A, GEURTS, F, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HAMED, A, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEINZ, M, HEPPELMANN, S, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, HUANG, B, HUANG, HZ, HUMANIC, TJ, HUO, L, IGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKL, P, JENA, C, JIN, F, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, KAPITAN, J, KAUDER, K, KEANE, D, KECHECHYAN, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KONZER, J, KOPYTINE, M, KORALT, I, KOROLEVA, L, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, N, LI, W, LI, X, LI, Y, LI, ZM, LIN, G, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, LS, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUO, X, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MATULENKO, YA, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITROVSKI, MK, MOHANTY, B, MONDAL, MM, MOROZOV, B, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NG, MJ, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PILE, P, PLANINIC, M, PLOSKON, MA, PLUTA, J, PLYKU, D, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUJAHARI, PR, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, SAHOO, R, SAKAI, S, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SANGALINE, E, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STASZAK, D, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SVIRIDA, DN, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN LEEUWEN, M, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WINGFIELD, E, WISSINK, SW, WITT, R, WU, YF, XIE, W, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YIP, K, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, J, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, J, ZHONG, C, ZHOU, J, ZHOU, W, ZHU, X, ZHU, YH, ZOULKARNEEV, R, and ZOULKARNEEVA, Y
Subjects: Charge Balance Function, Boost-Invariance, Pairs, Nucleus-Nucleus Collisions, Longitudinal Scaling, E&E Annihilation, Jets, Events, Heavy-Ion Collisions, Particle, Transverse-Momentum
Abstract: We present measurements of the charge balance function, from the charged particles, for diverse pseudorapidity and transverse momentum ranges in Au + Au collisions at root S(NN) = 200 GeV using the STAR detector at RHIC. We observe that the balance function is boost-invariant within the pseudorapidity coverage vertical bar-1.3, 1.3 vertical bar. The balance function properly scaled by the width of the observed pseudorapidity window does not depend on the position or size of the pseudorapidity window. This scaling property also holds for particles in different transverse momentum ranges. In addition, we find that the width of the balance function decreases monotonically with increasing transverse momentum for all centrality classes. .
Published: 2010

41. Observation of pi(+)pi(-)pi(+)pi(-) photoproduction in ultraperipheral heavy-ion collisions at root s(NN)=200 GeV at the STAR detector

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARNBY, LS, BAUMGART, S, BEAVIS, DR, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, BELLWIED, R, HAN, LX, HARRIS, JW, HAYS-WEHLE, JP, HEINZ, M, HEPPELMANN, S, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, BENEDOSSO, F, HOLLIS, RS, HUANG, HZ, HUMANIC, TJ, HUO, L, IGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKL, P, JENA, C, BETANCOURT, MJ, JIN, F, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, KAPITAN, J, KAUDER, K, BETTS, RR, KEANE, D, KECHECHYAN, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, BHASIN, A, KOLLEGGER, T, KONZER, J, KOPYTINE, M, KORALT, I, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, BHATI, AK, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEE, JH, BICHSEL, H, LEIGHT, W, LEVINE, MJ, LI, C, LI, L, LI, N, LI, W, LI, X, LI, Y, LI, Z, BIELCIK, J, LIN, G, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, BIELCIKOVA, J, LU, Y, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, BIRITZ, B, MASUI, H, MATIS, HS, MATULENKO, YA, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, BLAND, LC, MITROVSKI, MK, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, BONNER, BE, NG, MJ, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, PAGE, BS, BOUCHET, J, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PILE, P, BRAIDOT, E, PLANINIC, M, PLOSKON, MA, PLUTA, J, PLYKU, D, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, POWELL, CB, PRINDLE, D, PRUNEAU, C, BRANDIN, AV, PRUTHI, NK, PUJAHARI, PR, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, REHBERG, JM, RITTER, HG, BRIDGEMAN, A, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKAI, S, SAKREJDA, I, BRUNA, E, SAKUMA, T, SALUR, S, SANDWEISS, J, SANGALINE, E, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, BUELTMANN, S, SELYUZHENKOV, I, SEYBOTH, P, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, BUNZAROV, I, SMIRNOV, N, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STASZAK, D, STEVENS, JR, STOCK, R, STRIKHANOV, M, BURTON, TP, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, CAI, XZ, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, CAINES, H, TIMOSHENKO, S, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, SANCHEZ, MCD, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, CATU, O, VOLOSHIN, SA, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, X, WANG, XL, CEBRA, D, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WINGFIELD, E, WISSINK, SW, WITT, R, WU, Y, CENDEJAS, R, XIE, W, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YIP, K, CERVANTES, MC, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, CHAJECKI, Z, ZHAO, J, ZHONG, C, ZHOU, J, ZHOU, W, ZHU, X, ZHU, YH, ZOULKARNEEV, R, ZOULKARNEEVA, Y, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, P, CHUNG, SU, CLARKE, RF, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, LEYVA, AD, DE SILVA, LC, DEBBE, RR, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DUNLOP, JC, MAZUMDAR, MRD, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, EVDOKIMOV, O, FACHINI, P, FATEMI, R, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, EJ, GEROMITSOS, A, GEURTS, F, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, and GORDON, A
Subjects: Quarkonia, Helicity-Coupling Amplitudes, Physics, Time Projection Chamber, Mass, Photon, Gamma-Gamma
Abstract: We present a measurement of pi(+)pi(-)pi(+)pi(-) photonuclear production in ultraperipheral Au-Au collisions at root s(NN) = 200 GeV from the STAR experiment. The pi(+)pi(-)pi(+)pi(-) final states are observed at low transverse momentum and are accompanied by mutual nuclear excitation of the beam particles. The strong enhancement of the production cross section at low transverse momentum is consistent with coherent photoproduction. The pi(+)pi(-)pi(+)pi(-) invariant mass spectrum of the coherent events exhibits a broad peak around 1540 +/- 40 MeV/c(2) with a width of 570 +/- 60 MeV/c(2), in agreement with the photoproduction data for the rho(0)(1700). We do not observe a corresponding peak in the pi(+)pi(-) final state and measure an upper limit for the ratio of the branching fractions of the rho(0)(1700) to pi(+)pi(-) and pi(+)pi(-)pi(+)pi(-) of 2.5% at 90% confidence level. The ratio of rho(0)(1700) and rho(0)(770) coherent production cross sections is measured to be 13.4 +/- 0.8(stat.) +/- 4.4(syst.)%.
Published: 2010
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42. Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production at midrapidity in polarized proton collisions at s=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ALAKHVERDYANTS, AV, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUMGART, S, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, HAN, LX, BEAVIS, DR, HARRIS, JW, HAYS-WEHLE, JP, HEINZ, M, HEPPELMANN, S, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, BELLWIED, R, HUANG, HZ, HUMANIC, TJ, HUO, L, IGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKL, P, JENA, C, JIN, F, BENEDOSSO, F, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, KAPITAN, J, KAUDER, K, KEANE, D, BETANCOURT, MJ, KECHECHYAN, A, KETTLER, D, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, BETTS, RR, KONZER, J, KOPYTINE, M, KORALT, I, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRUEGER, K, KRUS, M, KUMAR, L, BHASIN, A, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEE, JH, LEIGHT, W, BHATI, AK, LEVINE, MJ, LI, C, LI, L, LI, N, LI, W, LI, X, LI, Y, LI, Z, LIN, G, BICHSEL, H, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, BIELCIK, J, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MASUI, H, BIELCIKOVA, J, MATIS, HS, MATULENKO, YA, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITROVSKI, MK, BIRITZ, B, MOHANTY, B, MONDAL, MM, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NG, MJ, BLAND, LC, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, BONNER, BE, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PILE, P, PLANINIC, M, BOUCHET, J, PLOSKON, MA, PLUTA, J, PLYKU, D, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, POWELL, CB, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, BRAIDOT, E, PUJAHARI, PR, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, REHBERG, JM, RITTER, HG, ROBERTS, JB, BRANDIN, AV, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKAI, S, SAKREJDA, I, SAKUMA, T, BRIDGEMAN, A, SALUR, S, SANDWEISS, J, SANGALINE, E, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SCHUSTER, TR, SEELE, J, SEGER, J, SELYUZHENKOV, I, BRUNA, E, SEYBOTH, P, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, BUELTMANN, S, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STASZAK, D, STEVENS, JR, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, BUNZAROV, I, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, BURTON, TP, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, CAI, XZ, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, CAINES, H, VAN BUREN, G, VAN NIEUWENHUIZEN, G, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VIDEBAEK, F, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, SANCHEZ, MCD, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, X, WANG, XL, WANG, Y, CATU, O, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WINGFIELD, E, WISSINK, SW, WITT, R, WU, Y, XIE, W, CEBRA, D, XU, N, XU, QH, XU, W, XU, Y, XU, Z, XUE, L, YANG, Y, YEPES, P, YIP, K, YOO, IK, CENDEJAS, R, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, J, CERVANTES, MC, ZHONG, C, ZHOU, J, ZHOU, W, ZHU, X, ZHU, YH, ZOULKARNEEV, R, ZOULKARNEEVA, Y, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, P, CLARKE, RF, CODRINGTON, MJM, CORLISS, R, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, LEYVA, AD, SILVA, LC, DEBBE, RR, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DUNLOP, JC, MAZUMDAR, MRD, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, FEDORISIN, J, FERSCH, RG, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, EJ, GEROMITSOS, A, GEURTS, F, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GORDON, A, and GREBENYUK, O
Subjects: Photoproduction, Momentum, Parton Distributions, Jet, Hadrons, Nucleon
Abstract: We report a measurement of the longitudinal double-spin asymmetry A(LL) and the differential cross section for inclusive pi(0) production at midrapidity in polarized proton collisions at s=200 GeV. The cross section was measured over a transverse momentum range of 1 < p(T)< 17 GeV/c and found to be in good agreement with a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry was measured in the range of 3.7 < p(T)< 11 GeV/c and excludes a maximal positive gluon polarization in the proton. The mean transverse momentum fraction of pi(0)'s in their parent jets was found to be around 0.7 for electromagnetically triggered events.
Published: 2009

43. An Experimental Exploration of the QCD Phase Diagram: The Search for the Critical Point and the Onset of De-confinement

Author: STAR Collaboration, Aggarwal, M. M., Ahammed, Z., Alakhverdyants, A. V., Alekseev, I., Anderson, B. D., Arkhipkin, D., Averichev, G. S., Balewski, J., Barnby, L. S., Baumgart, S., Beavis, D. R., Bellwied, R., Betancourt, M. J., Betts, R. R., Bhasin, A., Bhati, A. K., Bichsel, H., Bielcik, J., Bielcikova, J., Biritz, B., Bland, L. C., Bonner, B. E., Bouchet, J., Braidot, E., Brandin, A. V., Bridgeman, A., Bruna, E., Bueltmann, S., Bunzarov, I., Burton, T. P., Cai, X. Z., Caines, H., Calder��ndelaBarcaS��nchez, M., Catu, O., Cebra, D., Cendejas, R., Cervantes, M. C., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., Chen, H. F., Chen, J. H., Chen, J. Y., Cheng, J., Cherney, M., Chikanian, A., Choi, K. E., Christie, W., Chung, P., Clarke, R. F., Codrington, M. J. M., Corliss, R., Cramer, J. G., Crawford, H. J., Das, D., Dash, S., DavilaLeyva, A., DeSilva, L. C., Debbe, R. R., Dedovich, T. G., Derevschikov, A. A., DerradideSouza, R., Didenko, L., Djawotho, P., Dogra, S. M., Dong, X., Drachenberg, J. L., Draper, J. E., Dunlop, J. C., DuttaMazumdar, M. R., Efimov, L. G., Elhalhuli, E., Elnimr, M., Engelage, J., Eppley, G., Erazmus, B., Estienne, M., Eun, L., Evdokimov, O., Fachini, P., Fatemi, R., Fedorisin, J., Fersch, R. G., Filip, P., Finch, E., Fine, V., Fisyak, Y., Gagliardi, C. A., Gangadharan, D. R., Ganti, M. S., Garcia, E. J., Solis, Geromitsos, A., Geurts, F., Ghazikhanian, V., Ghosh, P., Gorbunov, Y. N., Gordon, A., Grebenyuk, O., Grosnick, D., Guertin, S. M., Gupta, A., Gupta, N., Guryn, W., Haag, B., Hamed, A., Han, LX., Harris, J. W., HaysWehle, J. P., Heinz, M., Heppelmann, S., Hirsch, A., Hjort, E., Hoffman, A. M., Hoffmann, G. W., Hofman, D. J., Huang, B., Huang, H. Z., Humanic, T. J., Huo, L., Igo, G., Jacobs, P., Jacobs, W. W., Jena, C., Jin, F., Jones, C. L., Jones, P. G., Joseph, J., Judd, E. G., Kabana, S., Kajimoto, K., Kang, K., Kapitan, J., Kauder, K., Keane, D., Kechechyan, A., Kettler, D., Kikola, D. P., Kiryluk, J., Kisiel, A., Klein, S. R., Knospe, A. G., Kocoloski, A., Koetke, D. D., Kollegger, T., Konzer, J., Koralt, I., Koroleva, L., Korsch, W., Kotchenda, L., Kouchpil, V., Kravtsov, P., Krueger, K., Krus, M., Kumar, L., Kurnadi, P., Lamont, M. A. C., Landgraf, J. M., LaPointe, S., Lauret, J., Lebedev, A., Lednicky, R., C, Lee, H., Lee, J. H., Leight, W., LeVine, M. J., Li, C., Li, L., Li, N., Li, W., Li, X., Li, Y., Li, Z. M., Lin, G., Lindenbaum, S. J., Lisa, M. A., Liu, F., Liu, H., Liu, J., Ljubicic, T., Llope, W. J., Longacre, R. S., Love, W. A., Lu, Y., Luo, X., Ma, G. L., Ma, Y. G., Mahapatra, D. P., Majka, R., Mall, O. I., Mangotra, L. K., Manweiler, R., Margetis, S., Markert, C., Masui, H., Matis, H. S., Matulenko, Yu. A., McDonald, D., McShane, T. S., Meschanin, A., Milner, R., Minaev, N. G., Mioduszewski, S., Mischke, A., Mitrovski, M. K., Mohanty, B., Mondal, M. M., Morozov, B., Morozov, D. A., Munhoz, M. G., Nandi, B. K., Nattrass, C., Nayak, T. K., Nelson, J. M., Netrakanti, P. K., Ng, M. J., Nogach, L. V., Nurushev, S. B., Odyniec, G., Ogawa, A., Okorokov, V., Oldag, E. W., Olson, D., Pachr, M., Page, B. S., Pal, S. K., Pandit, Y., Panebratsev, Y., Pawlak, T., Peitzmann, T., Perevoztchikov, V., Perkins, C., Peryt, W., Phatak, S. C., Pile, P., Planinic, M., Ploskon, M. A., Pluta, J., Plyku, D., Poljak, N., Poskanzer, A. M., Potukuchi, B. V. K. S., Powell, C. B., Prindle, D., Pruneau, C., Pruthi, N. K., Pujahari, P. R., Putschke, J., Raniwala, R., Raniwala, S., Ray, R. L., Redwine, R., Reed, R., Ritter, H. G., Roberts, J. B., Rogachevskiy, O. V., Romero, J. L., Rose, A., Roy, C., Ruan, L., Sahoo, R., Sakai, S., Sakrejda, I., Sakuma, T., Salur, S., Sandweiss, J., Sangaline, E., Schambach, J., Scharenberg, R. P., Schmitz, N., Schuster, T. R., Seele, J., Seger, J., Selyuzhenkov, I., Seyboth, P., Shahaliev, E., Shao, M., Sharma, M., Shi, S. S., Sichtermann, E. P., Simon, F., Singaraju, R. N., Skoby, M. J., Smirnov, N., Sorensen, P., Sowinski, J., Spinka, H. M., Srivastava, B., Stanislaus, T. D. S., Staszak, D., Stevens, J. R., Stock, R., Strikhanov, M., Stringfellow, B., Suaide, A. A. P., Suarez, M. C., Subba, N. L., Sumbera, M., Sun, X. M., Sun, Y., Sun, Z., Surrow, B., Svirida, D. N., Symons, T. J. M., SzantodeToledo, A., Takahashi, J., Tang, A. H., Tang, Z., Tarini, L. H., Tarnowsky, T., Thein, D., Thomas, J. H., Tian, J., Timmins, A. R., Timoshenko, S., Tlusty, D., Tokarev, M., Tram, V. N., Trentalange, S., Tribble, R. E., Tsai, O. D., Ulery, J., Ullrich, T., Underwood, D. G., VanBuren, G., vanLeeuwen, M., vanNieuwenhuizen, G., Vanfossen, J. A., Varma, R., Vasconcelos, G. M. S., Vasiliev, A. N., Videbaek, F., Viyogi, Y. P., Vokal, S., Voloshin, S. A., Wada, M., Walker, M., Wang, F., Wang, G., Wang, H., Wang, J. S., Wang, Q., Wang, X. L., Wang, Y., Webb, G., Webb, J. C., Westfall, G. D., WhittenJr., C., Wieman, H., Wissink, S. W., Witt, R., Wu, Y. F., Xie, W., Xu, N., Xu, Q. H., Xu, W., Xu, Y., Xu, Z., Xue, L., Yang, Y., Yepes, P., Yip, K., Yoo, IK., Yue, Q., Zawisza, M., Zbroszczyk, H., Zhan, W., Zhang, J. B., Zhang, S., Zhang, W. M., Zhang, X. P., Zhang, Y., Zhang, Z. P., Zhao, J., Zhong, C., Zhou, J., Zhou, W., Zhu, X., Zhu, Y. H., Zoulkarneev, R., Zoulkarneeva, Y., Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), and STAR
Subjects: FOS: Physical sciences, High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), nucl-ex, Nuclear Experiment
Abstract: The QCD phase diagram lies at the heart of what the RHIC Physics Program is all about. While RHIC has been operating very successfully at or close to its maximum energy for almost a decade, it has become clear that this collider can also be operated at lower energies down to 5 GeV without extensive upgrades. An exploration of the full region of beam energies available at the RHIC facility is imperative. The STAR detector, due to its large uniform acceptance and excellent particle identification capabilities, is uniquely positioned to carry out this program in depth and detail. The first exploratory beam energy scan (BES) run at RHIC took place in 2010 (Run 10), since several STAR upgrades, most importantly a full barrel Time of Flight detector, are now completed which add new capabilities important for the interesting physics at BES energies. In this document we discuss current proposed measurements, with estimations of the accuracy of the measurements given an assumed event count at each beam energy., 59 pages, 78 figures

44. A retrospective comparative study of robot-assisted unilateral biportal endoscopic lumbar decompression and fusion surgery versus percutaneous endoscopic lumbar decompression and fusion surgery.

Author: Liu YD, Deng Q, Han LX, Zhang KD, Zhang YJ, Peng RD, Yang HY, Guo TF, Li JJ, Chen B, and Tan S
Subjects: Humans, Male, Female, Retrospective Studies, Middle Aged, Adult, Treatment Outcome, Operative Time, Aged, Length of Stay statistics & numerical data, Pain Measurement, Spinal Fusion methods, Decompression, Surgical methods, Lumbar Vertebrae surgery, Robotic Surgical Procedures methods, Robotic Surgical Procedures adverse effects, Endoscopy methods
Abstract: The objective of this study is to illustrate the advantages of robot-assisted unilateral biportal endoscopy in lumbar decompression fusion and internal fixation surgery. According to the different surgical methods, we divided the 26 patients into 2 groups, robot-assisted unilateral biportal endoscopy for lumbar interbody fusion (R-ULIF) group and percutaneous endoscopic lumbar decompression and interbody fusion (Endo-LIF) group, with a 1:1 ratio. Gender, disease course, lesion site, fluoroscopy times, operative time, blood loss, postoperative hospital stay, screw placement success rate, fusion rate, complications rate, postoperative pain visual analog scale (VAS) (The VAS score is used only to evaluate pain in the lower back and legs.) Oswestry Disability Index (ODI) (The ODI score can serve as a reference indicator for evaluating the effectiveness of treatment for patients with low back pain, and has good responsiveness in assessing patients with chronic low back pain), and MacNab (The MacNab standard is divided into 4 levels: excellent, good, fair, and poor, which can be used to evaluate the therapeutic efficacy of certain spinal surgeries) standard efficacy evaluation were analyzed and compared between the 2 groups. All patients successfully completed the surgery. Compared with the Endo-LIF group, the R-ULIF group had fewer fluoroscopy procedures, less intraoperative blood loss, and shorter postoperative hospital stay (P < .05). The VAS scores and ODI scores of both groups significantly decreased at all-time points (P < .05). The ODI scores of the R-ULIF group were better than the Endo-LIF group at 1 month and 3 months after surgery (P = .017/P = .047), but there was no statistically significant difference between the groups before surgery and 1 week after surgery (P > .05). The efficacy was evaluated using the MacNab criteria at 6 months after surgery. The R-ULIF group has an excellent and good rate of 84.6%, while the Endo-LIF group has an excellent and good rate of 76.9% (P = 1.000). Robot-assisted unilateral biportal endoscopy for lumbar interbody and fusion surgery has shown short-term clinical efficacy in the treatment of lumbar disc herniation combined with lumbar instability, surpassing endoscopic lumbar interbody fusion surgery. Robot-assisted unilateral biportal endoscopy for lumbar interbody and fusion surgery has demonstrated high success rate in screw placement, minimal radiation exposure, less intraoperative blood loss, shorter hospital stay, and thus deserves further clinical promotion., Competing Interests: The authors have no conflicts of interest to disclose., (Copyright © 2024 the Author(s). Published by Wolters Kluwer Health, Inc.)
Published: 2024
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45. Preparation and efficacy of antibacterial methacrylate monomer-based polymethyl methacrylate bone cement containing N-halamine compounds.

Author: Guo R, Kan YC, Xu Y, Han LY, Bu WH, Han LX, Qi YY, and Chu JJ
Abstract: Introduction: Our objective in this study was to prepare a novel type of polymethyl methacrylate (PMMA) bone cement, analyze its material properties, and evaluate its safety and antibacterial efficacy., Methods: A halamine compound methacrylate antibacterial PMMA bone cement containing an N-Cl bond structure was formulated, and its material characterization was determined with Fourier transform infrared spectroscopy (FT-IR) and 1 H-NMR. The antibacterial properties of the material were studied using contact bacteriostasis and releasing-type bacteriostasis experiments. Finally, in vitro and in vivo biocompatibility experiments were performed to analyze the toxic effects of the material on mice and embryonic osteoblast precursor cells (MC3T3-E1)., Results: Incorporation of the antibacterial methacrylate monomer with the N-halamine compound in the new antibacterial PMMA bone cement significantly increased its contact and releasing-type bacteriostatic performance against Staphylococcus aureus . Notably, at 20% and 25% additions of N-halamine compound, the contact and releasing-type bacteriostasis rates of bone cement samples reached 100% ( p < 0.001). Furthermore, the new antibacterial bone cement containing 5%, 10%, and 15% N-halamine compounds showed good biocompatibility in vitro and in vivo ., Conclusion: In this study, we found that the novel antibacterial PMMA bone cement with N-halamine compound methacrylate demonstrated good contact and releasing-type bacteriostatic properties against S. aureus . In particular, bone cement containing a 15% N-halamine monomer exhibited strong antibacterial properties and good in vitro and in vivo biocompatibility., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Guo, Kan, Xu, Han, Bu, Han, Qi and Chu.)
Published: 2024
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46. Injectable isoniazid-loaded bone cement based on hydrazone bonds achieving long-term release and decent mechanical properties.

Author: Xu Y, Lin H, Gao Z, Guo R, Kan YC, Han LY, Bu WH, Wang Z, Asilebieke A, Han LX, Li C, He F, and Chu JJ
Subjects: Animals, Antitubercular Agents chemistry, Antitubercular Agents pharmacology, Antitubercular Agents administration & dosage, Mice, Drug Liberation, Polymethyl Methacrylate chemistry, Materials Testing, Biocompatible Materials chemistry, Biocompatible Materials pharmacology, Isoniazid chemistry, Isoniazid pharmacology, Bone Cements chemistry, Hydrazones chemistry, Hydrazones pharmacology
Abstract: A robust and easily manufactured high-strength and long-term release hydrazone-based isoniazid acrylic (HIA) bone cement is reported. The mechanical strength of HIA bone cement is similar to that of normal polymethyl methacrylate (PMMA) bone cement, far surpassing that of traditional isoniazid-containing antibiotic-loaded bone cement (INH bone cement). Isoniazid is connected to the bone cement through bioorthogonal hydrazone chemistry, and it possesses release properties superior to those of INH bone cement, allowing for the sustained release of isoniazid for up to 12 weeks. In vivo and in vitro studies also indicate that HIA cement exhibits better biocompatibility than INH bone cement. The results of this study not only signify progress in the realm of antimicrobial bone cement for addressing bone tuberculosis but also enhance our capacity to create and comprehend high-performing antimicrobial bone cement.
Published: 2024
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47. Investigating the in vitro antibacterial efficacy of composite bone cement incorporating natural product-based monomers and gentamicin.

Author: Kan YC, Guo R, Xu Y, Han LY, Bu WH, Han LX, and Chu JJ
Subjects: Gentamicins pharmacology, Bone Cements pharmacology, Quercetin, Staphylococcus aureus, Anti-Bacterial Agents pharmacology, Curcumin pharmacology, Emodin, Biological Products pharmacology, Anthraquinones, Polyphenols
Abstract: Objective: The objective of this study is to investigate the impact of four natural product extracts, namely, aloe-emodin, quercetin, curcumin, and tannic acid, on the in vitro bacteriostatic properties and biocompatibility of gentamicin-loaded bone cement and to establish an experimental groundwork supporting the clinical utility of antibiotic-loaded bone cements (ALBC)., Methods: Based on the components, the bone cement samples were categorized as follows: the gentamicin combined with aloe-emodin group, the gentamicin combined with quercetin group, the gentamicin combined with curcumin group, the gentamicin combined with tannic acid group, the gentamicin group, the aloe-emodin group, the quercetin group, the curcumin group, and the tannic acid group. Using the disk diffusion test, we investigated the antibacterial properties of the bone cement material against Staphylococcus aureus (n = 4). We tested cell toxicity and proliferation using the cell counting kit-8 (CCK-8) and examined the biocompatibility of bone cement materials., Results: The combination of gentamicin with the four natural product extracts resulted in significantly larger diameters of inhibition zones compared to gentamicin alone, and the difference was statistically significant (P < 0.05). Except for the groups containing tannic acid, cells in all other groups showed good proliferation across varying time intervals without displaying significant cytotoxicity (P < 0.05)., Conclusion: In this study, aloe-emodin, quercetin, curcumin, and tannic acid were capable of enhancing the in vitro antibacterial performance of gentamicin-loaded bone cement against S. aureus. While the groups containing tannic acid displayed moderate cytotoxicity in in vitro cell culture, all other groups showed no discernible cytotoxic effects., (© 2024. The Author(s).)
Published: 2024
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48. Solvent Effects on the 1 H-NMR Chemical Shifts of Imidazolium-Based Ionic Liquids.

Author: Du MX, Han LX, Wang SR, Xu KJ, Zhu WR, Qiao X, and Liu CY
Abstract: The 1 H nuclear magnetic resonance ( 1 H-NMR) spectrum is a useful tool for characterizing the hydrogen bonding (H-bonding) interactions in ionic liquids (ILs). As the main hydrogen bond (H-bond) donor of imidazolium-based ILs, the chemical shift (δ H2 ) of the proton in the 2-position of the imidazolium ring (H2) exhibits significant and complex solvents, concentrations and anions dependence. In the present work, based on the dielectric constants (ϵ) and Kamlet-Taft (KT) parameters of solvents, we identified that the δ H2 are dominated by the solvents polarity and the competitive H-bonding interactions between cations and anions or solvents. Besides, the solvents effects on δ H2 are understood by the structure of ILs in solvents: 1) In diluted solutions of inoizable solvents, ILs exist as free ions and the cations will form H-bond with solvents, resulting in δ H2 being independent with anions but positively correlated with β S . 2) In diluted solutions of non-ionzable solvents, ILs exist as contact ion-pairs (CIPs) and H2 will form H-bond with anions. Since non-ionizable solvents hardly influence the H-bonding interactions between H2 and anions, the δ H2 are not related to β S but positively correlated with β IL ., (© 2023 Wiley-VCH GmbH.)
Published: 2023
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49. [Microsurgical thinned anterolateral thigh perforator flap to repair soft tissue defects of foot and ankle].

Author: Lan RY, Jiang JY, Yu T, Zhang WH, Han LX, and Ren XP
Subjects: Female, Male, Humans, Young Adult, Adult, Middle Aged, Thigh surgery, Ankle Joint, Hematoma, Ankle surgery, Perforator Flap
Abstract: Objective: To explore method and clinical effect of microsurgical thinned anterolateral thigh perforator flap to repair soft tissue defects of foot and ankle., Methods: From March 2017 to January 2022, totally 20 patients with soft tissue defects of ankle joint were treated with micro-thinning anterolateral perforator flap for free transplantation, included 13 males and 7 females, aged from 22 to 58 years old with an average of (36.45±12.36) years old. The size of flap ranged from 8.0 cm×5.0 cm to 20.0 cm×12.0 cm. Before operation, perforating vessels on the anterolateral thigh region were detected and marked with a portable Doppler detector. For the defect width less than 8 cm, 11 patients were repaired with a single flap. For the defect width more than 8 cm, the wound could not be sutured directly, and the lobulated flap technique was used in 9 patients, the width was converted to length, and the donor site was closed directly. Under the microscope, all flaps were thinened in a stepwise manner from the center of the pedicle to the periphery. After operation, survival of the flap, the shape, texture, sensory function recovery were observes, and recovery of foot function was evaluated by Maryland foot function evaluation standard., Results: All 20 patients with microsurgical thinned anterolateral thigh perforator flaps were survived. Venous crisis occurred in 1 patient due to subcutaneous hematoma, after removal of the hematoma, the crisis was relieved and the flap survived successfully. The wounds in the donor and recipient sites healed well, and only linear scars left in the donor sites. Twenty patients were followed up for 3 to 26 months after operation, good shape of flaps without bloated, and good texture. The two-point discrimination of free flaps ranged from 9.0 to 16.0 mm, and the protective sensation was restored. The ankle flexion and extension function recovered well and patients could walk normally. According to Maryland foot function evaluation standard, 8 patients got excellent result, 10 patients good and 2 middle., Conclusion: Microsurgical thinned anterolateral thigh perforator flap is an ideal method to repair soft tissue defects in functional area of foot and ankle, with good appearance and texture of the flap, no need for re-plastic surgery, reduced hospitalization costs, and less donor site damage.
Published: 2023
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50. [Determination of 12 typical personal care products in human urine samples by ultra performance liquid chromatography-tandem mass spectrometry].

Author: Han LX, Zhang X, Hu XJ, Zhang HJ, Qiu T, Lin X, and Zhu Y
Subjects: Humans, Chromatography, Liquid, Tandem Mass Spectrometry methods, Chromatography, High Pressure Liquid, Solid Phase Extraction, Benzophenones, Parabens, Cosmetics
Abstract: A rapid and sensitive method based on ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was developed for the simultaneous determination of 12 typical personal care products (PCPs) in human urine. These PCPs included five paraben preservatives (PBs), five benzophenone UV absorbers (BPs), and two antibacterial agents. Accordingly, 1 mL of the urine sample was mixed with 500 μL of β -glucuronidase-ammonium acetate buffer solution (enzymatic activities are 500 units/mL) and 75 μL of a mixed internal standard working solution (internal standard contents are 7.5 ng), followed by enzymatic hydrolysis overnight (≥16 h) at 37 ℃ in a water bath. The 12 targeted analytes were enriched and cleaned up using an Oasis HLB solid phase extraction column. Separation was performed on an Acquity BEH C 18 column (100 mm×2.1 mm, 1.7 μm) using an acetonitrile-water system as the mobile phase, in negative electrospray ionization (ESI - ) multiple reaction monitoring (MRM) mode, for target detection and stable isotope internal standard quantification. The optimal MS conditions were established by optimizing the instrument parameters and comparing two analytical columns (Acquity BEH C 18 and Acquity UPLC HSS T 3 ) as well as different types of mobile phases (methanol or acetonitrile as the organic phase) to achieve better chromatographic separation. In order to obtain higher enzymatic and extraction efficiency, different enzymatic conditions, solid phase extraction columns, and elution conditions were investigated. The final results showed that methyl parabens (MeP), benzophenone-3 (BP-3), and triclosan (TCS) showed good linearities in the ranges of 4.00-800, 4.00-800 and 5.00-200 μg/L, respectively, the other targeted compounds showed good linearities in the ranges of 1.00-200 μg/L. The correlation coefficients were all greater than 0.999. The method detection limits (MDLs) were in the range of 0.06-1.09 μg/L, and the method quantification limits (MQLs) ranged from 0.08 to 3.63 μg/L. At three spiked levels, the average recoveries of the 12 targeted analytes ranged from 89.5% to 111.8%. The intra-day and inter-day precisions were 3.7%-8.9% and 2.0%-10.6%, respectively. The results of the matrix effect assessment showed that MeP, ethyl paraben (EtP), and benzophenone-2 (BP-2) exhibited strong matrix effects (26.7%-103.8%); propyl paraben (PrP) exhibited moderate matrix effects (79.2%-112.0%); and the other eight target analytes exhibited weak matrix effects (83.3%-113.8%). The matrix effects of the 12 targeted analytes after correction using the stable isotopic internal standard method ranged from 91.9% to 110.1%. The developed method was successfully applied to the determination of the 12 PCPs in 127 urine samples. Ten typical PCPs were detected, with the overall detection rates ranging from 1.7% to 99.7%, except for benzyl paraben (BzP) and benzophenone-8 (BP-8). The results revealed that the population in this area was widely exposed to PCPs, especially MeP, EtP and PrP; the detection rates and concentrations of these PCPs were found to be very high. Our analytical method is simple and sensitive, and it is expected to be an effective tool for biomonitoring PCPs in human urine samples as part of environmental health studies.
Published: 2023
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