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Start Over Author "E. Draper, J." Topic high energy physics - experiment
9 results on '"E. Draper, J."'

1. $\rho^{0}$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR

Author

Agakishiev, G., M. Aggarwal, M., Ahammed, Z., V. Alakhverdyants, A., Alekseev, I., Alford, J., D. Anderson, B., D. Anson, C., Arkhipkin, D., S. Averichev, G., Balewski, J., R. Beavis, D., K. Behera, N., Bellwied, R., J. Betancourt, M., Betts, R.R., Bhasin, A., K. Bhati, A., Bichsel, H., Bielcik, J., Bielcikova, J., C. Bland, L., G. Bordyuzhin, I., Borowski, W., Bouchet, J., Braidot, E., V. Brandin, A., Bridgeman, A., G. Brovko, S., Bruna, E., Bueltmann, S., Bunzarov, I., P. Burton, T., Z. Cai, X., Caines, H., Calder'On De La Barca S'Anchez, M., Cebra, D., Cendejas, R., C. Cervantes, M., Chaloupka, P., Chattopadhyay, S., F. Chen, H., H. Chen, J., Y. Chen, J., Chen, Lin, Cheng, J., Cherney, M., Chikanian, A., E. Choi, K., Christie, W., Chung, P., J. M. Codrington, M., Corliss, R., G. Cramer, J., J. Crawford, H., Davila Leyva, A., C. De Silva, L., Debbe, R.R., G. Dedovich, T., Deng, J., A. Derevschikov, A., Derradi De Souza, R., Didenko, L., Djawotho, P., M. Dogra, S., Dong, X., L. Drachenberg, J., E. Draper, J., M. Du, C., C. Dunlop, J., G. Efimov, L., Elnimr, M., Engelage, J., Eppley, G., Estienne, Magali, Eun, L., Evdokimov, O., Fatemi, R., Fedorisin, J., G. Fersch, R., Filip, P., Finch, E., Fine, V., Fisyak, Y., Gagliardi, C.A., Geurts, F., Ghosh, P., N. Gorbunov, Y., Gordon, A., G. Grebenyuk, O., Grosnick, D., Gupta, Anupam, Gupta, S., Guryn, W., Haag, B., Hajkova, O., Hamed, A., Han, L.-X., W. Harris, J., P. Hays-Wehle, J., Heinz, M., Heppelmann, S., Hirsch, A., Hjort, E., W. Hoffmann, G., J. Hofman, D., Huang, B., Z. Huang, H., J. Humanic, T., Huo, L., Igo, G., Jacobs, P., Jacobs, W.W., Jena, C., Jin, F., Joseph, J., G. Judd, E., Kabana, S., Kang, K., Kapitan, J., Kauder, K., W. Ke, H., Keane, D., Kechechyan, A., Kettler, D., P. Kikola, D., Kiryluk, J., Kisiel, A., Kizka, V., R. Klein, S., G. Knospe, A., D. Koetke, D., Kollegger, T., Konzer, J., Koralt, I., Koroleva, L., Korsch, W., Kotchenda, L., Kouchpil, V., Kravtsov, P., Krueger, K., Krus, M., Kumar, L., Lamont, M.A. C., M. Landgraf, J., Lapointe, S., Lauret, J., Lebedev, A., Lednicky, R., H. Lee, J., Leight, W., J. Levine, M., Li, C., Li, L., Li, N., Li, W., Li, Xiaojian, Li, Y., M. Li, Z., M. Lima, L., A. Lisa, M., Liu, Franklin, Liu, Hong, Liu, J., Ljubicic, T., J. Llope, W., S. Longacre, R., Lu, Y., V. Lukashov, E., Luo, X., L. Ma, G., G. Ma, Y., P. Mahapatra, D., Majka, R., I. Mall, O., Manweiler, R., Margetis, S., Markert, C., Masui, H., S. Matis, H., Mcdonald, D., S. Mcshane, T., Meschanin, A., Milner, R., G. Minaev, N., Mioduszewski, S., K. Mitrovski, M., Mohammed, Y., Mohanty, B., M. Mondal, M., Morozov, B., Morozov, D.A., G. Munhoz, M., K. Mustafa, M., Naglis, M., K. Nandi, B., K. Nayak, T., V. Nogach, L., B. Nurushev, S., Odyniec, G., Ogawa, A., Oh, K., Ohlson, A., Okorokov, V., W. Oldag, E., Oliveira, R.A. N., Olson, D., Pachr, M., S. Page, B., K. Pal, S., Pandit, Y., Panebratsev, Y., Pawlak, T., Pei, H., Peitzmann, T., Perkins, C., Peryt, W., Pile, P., Planinic, M., A. Ploskon, M., Pluta, J., Plyku, D., Poljak, N., Porter, J., M. Poskanzer, A., V. K. S. Potukuchi, B., B. Powell, C., Prindle, D., Pruneau, C., K. Pruthi, N., R. Pujahari, P., Putschke, J., Qiu, H., Raniwala, R., Raniwala, S., L. Ray, R., Redwine, R., Reed, R., G. Ritter, H., B. Roberts, J., V. Rogachevskiy, O., L. Romero, J., Ruan, L., Rusnak, J., R. Sahoo, N., Sakrejda, I., Salur, S., Sandweiss, J., Sangaline, E., Sarkar, A., Schambach, J., P. Scharenberg, R., Schaub, J., M. Schmah, A., Schmitz, N., R. Schuster, T., Seele, J., Seger, J., Selyuzhenkov, I., Seyboth, P., Shah, N., Shahaliev, E., Shao, M., Sharma, M., Shi, S.S., Y. Shou, Q., P. Sichtermann, E., Simon, F., N. Singaraju, R., J. Skoby, M., Smirnov, N., Solanki, D., Sorensen, P., G. Desouza, U., M. Spinka, H., Srivastava, B., D. S. Stanislaus, T., G. Steadman, S., R. Stevens, J., Stock, R., Strikhanov, M., Stringfellow, B., A. P. Suaide, A., C. Suarez, M., L. Subba, N., Sumbera, M., M. Sun, X., Sun, Y., Sun, Z., Surrow, B., N. Svirida, D., J. M. Symons, T., Szanto De Toledo, A., Takahashi, J., H. Tang, A., Tang, Z., H. Tarini, L., Tarnowsky, T., Thein, D., H. Thomas, J., Tian, J., R. Timmins, A., Tlusty, D., Tokarev, M., Trainor, T.A., Trentalange, S., E. Tribble, R., Tribedy, P., A. Trzeciak, B., D. Tsai, O., Ullrich, T., G. Underwood, D., Van Buren, G., Van Nieuwenhuizen, G., A. Vanfossen, J., Varma, R., M. S. Vasconcelos, G., N. Vasiliev, A., Videbæk, F., P. Viyogi, Y., Vokal, S., Voloshin, S.A., Wada, M., Walker, M., Wang, F., Wang, Gang, Wang, H., S. Wang, J., Wang, Q., L. Wang, X., Wang, Y., Webb, G., C. Webb, J., D. Westfall, G., Whitten Jr., C., Wieman, H., W. Wissink, S., Witt, R., Witzke, W., F. Wu, Y., Xiao, Z., Xie, W., Xu, H., Xu, N., H. Xu, Q., Xu, Wei-Jiang, Xu, Y., Xu, Z., Xue, L., Yang, Y., Yepes, P., Yip, K., Yoo, I.-K., Zawisza, M., Zbroszczyk, H., Zhan, W., B. Zhang, J., Zhang, S., M. Zhang, W., P. Zhang, X., Zhang, Y., P. Zhang, Z., Zhao, F., Zhao, J., Zhong, C., Zhu, X., H. Zhu, Y., 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
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, High Energy Physics - Experiment
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 $10.5\pm1.5\pm 1.6$ mb at 62.4 GeV. The cross-section ratio between 200 GeV and 62.4 GeV is $2.8\pm0.6$, less than is predicted by most theoretical models. It is, however, proportionally much larger than the previously observed $15\pm 55$% increase between 130 GeV and 200 GeV.

Published
2011

2. Strange and Multi-strange Particle Production in Au+Au Collisions at $\sqrt{s_{NN}}$ = 62.4 GeV

Author

Aggarwal, M.M., Ahammed, Z., Alakhverdyants, A.V., Alekseev, I., Alford, J., D. Anderson, B., D. Anson, C., Arkhipkin, D., S. Averichev, G., Balewski, J., R. Beavis, D., Bellwied, R., J. Betancourt, M., Betts, R.R., Bhasin, A., K. Bhati, A., Bichsel, H., Bielcik, J., Bielcikova, J., Biritz, B., C. Bland, L., Borowski, W., Bouchet, J., Braidot, E., V. Brandin, A., Bridgeman, A., G. Brovko, S., Bruna, E., Bueltmann, S., Bunzarov, I., P. Burton, T., Z. Cai, X., Caines, H., Calder'On De La Barca S'Anchez, M., Cebra, D., Cendejas, R., C. Cervantes, M., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., F. Chen, H., H. Chen, J., Y. Chen, J., Cheng, J., Cherney, M., Chikanian, A., E. Choi, K., Christie, W., Chung, P., J. M. Codrington, M., Corliss, R., G. Cramer, J., J. Crawford, H., Dash, S., Davila Leyva, A., C. De Silva, L., Debbe, R.R., G. Dedovich, T., A. Derevschikov, A., Derradi De Souza, R., Didenko, L., Djawotho, P., M. Dogra, S., Dong, X., L. Drachenberg, J., E. Draper, J., C. Dunlop, J., R. Dutta Mazumdar, M., G. Efimov, L., Elnimr, M., Engelage, J., Eppley, G., Estienne, Magali, Eun, L., Evdokimov, O., Fatemi, R., Fedorisin, J., G. Fersch, R., Finch, E., Fine, V., Fisyak, Y., Gagliardi, C.A., R. Gangadharan, D., Geromitsos, A., Geurts, F., Ghosh, P., N. Gorbunov, Y., Gordon, A., Grebenyuk, O., Grosnick, D., M. Guertin, S., Gupta, Anupam, Guryn, W., Haag, B., Hajkova, O., Hamed, A., Han, L.-X., W. Harris, J., P. Hays-Wehle, J., Heinz, M., Heppelmann, S., Hirsch, A., Hjort, E., W. Hoffmann, G., J. Hofman, D., Huang, B., Z. Huang, H., J. Humanic, T., Huo, L., Igo, G., Jacobs, P., Jacobs, W.W., Jena, C., Jin, F., Joseph, J., G. Judd, E., Kabana, S., Kang, K., Kapitan, J., Kauder, K., Keane, D., Kechechyan, A., Kettler, D., P. Kikola, D., Kiryluk, J., Kisiel, A., Kizka, V., R. Klein, S., G. Knospe, A., D. Koetke, 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., M. Landgraf, J., Lapointe, S., Lauret, J., Lebedev, A., Lednicky, R., H. Lee, J., Leight, W., J. Levine, M., Li, C., Li, L., Li, N., Li, W., Li, Xiaojian, Li, Y., M. Li, Z., A. Lisa, M., Liu, Franklin, Liu, Hong, Liu, J., Ljubicic, T., J. Llope, W., S. Longacre, R., Love, W.A., Lu, Y., V. Lukashov, E., Luo, X., L. Ma, G., G. Ma, Y., P. Mahapatra, D., Majka, R., I. Mall, O., K. Mangotra, L., Manweiler, R., Margetis, S., Markert, C., Masui, H., S. Matis, H., A. Matulenko, Yu., Mcdonald, D., S. Mcshane, T., Meschanin, A., Milner, R., G. Minaev, N., Mioduszewski, S., Mischke, A., K. Mitrovski, M., Mohanty, B., M. Mondal, M., Morozov, B., Morozov, D.A., G. Munhoz, M., Naglis, M., K. Nandi, B., K. Nayak, T., K. Netrakanti, P., J. Ng, M., V. Nogach, L., B. Nurushev, S., Odyniec, G., Ogawa, A., Okorokov, V., W. Oldag, E., Olson, D., Pachr, M., S. Page, B., K. Pal, S., Pandit, Y., Panebratsev, Y., Pawlak, T., Pei, H., Peitzmann, T., Perkins, C., Peryt, W., C. Phatak, S., Pile, P., Planinic, M., A. Ploskon, M., Pluta, J., Plyku, D., Poljak, N., M. Poskanzer, A., V. K. S. Potukuchi, B., B. Powell, C., Prindle, D., Pruneau, C., K. Pruthi, N., R. Pujahari, P., Putschke, J., Qiu, H., Raniwala, R., Raniwala, S., L. Ray, R., Redwine, R., Reed, R., G. Ritter, H., B. Roberts, J., V. Rogachevskiy, O., L. Romero, J., Rose, A., Ruan, L., Rusnak, J., Sakai, S., Sakrejda, I., Sakuma, T., Salur, S., Sandweiss, J., Sangaline, E., Schambach, J., P. Scharenberg, R., M. Schmah, A., Schmitz, N., R. Schuster, T., Seele, J., Seger, J., Selyuzhenkov, I., Seyboth, P., Shahaliev, E., Shao, M., Sharma, M., Shi, S.S., P. Sichtermann, E., Simon, F., N. Singaraju, R., J. Skoby, M., Smirnov, N., Sorensen, P., Speltz, J., M. Spinka, H., Srivastava, B., D. S. Stanislaus, T., Staszak, D., G. Steadman, S., R. Stevens, J., Stock, R., Strikhanov, M., Stringfellow, B., A. P. Suaide, A., C. Suarez, M., L. Subba, N., Sumbera, M., M. Sun, X., Sun, Y., Sun, Z., Surrow, B., N. Svirida, D., J. M. Symons, T., Szanto De Toledo, A., Takahashi, J., H. Tang, A., Tang, Z., H. Tarini, L., Tarnowsky, T., Thein, D., H. Thomas, J., Tian, J., R. Timmins, A., Tlusty, D., Tokarev, M., Trainor, T.A., N. Tram, V., Trentalange, S., E. Tribble, R., D. Tsai, O., Ullrich, T., G. Underwood, D., Van Buren, G., Van Nieuwenhuizen, G., A. Vanfossen, J., Varma, R., M. S. Vasconcelos, G., N. Vasiliev, A., Videbæk, F., P. Viyogi, Y., Vokal, S., Voloshin, S.A., Wada, M., Walker, M., Wang, F., Wang, Gang, Wang, H., S. Wang, J., Wang, Q., L. Wang, X., Wang, Y., Webb, G., C. Webb, J., D. Westfall, G., Whitten Jr., C., Wieman, H., W. Wissink, S., Witt, R., Witzke, W., F. Wu, Y., Xie, W., Xu, H., Xu, N., H. Xu, Q., Xu, Wei-Jiang, Xu, Y., Xu, Z., Xue, L., Yang, Y., Yepes, P., Yip, K., Yoo, I.-K., Yue, Q., Zawisza, M., Zbroszczyk, H., Zhan, W., B. Zhang, J., Zhang, S., M. Zhang, W., P. Zhang, X., Zhang, Y., P. Zhang, Z., Zhao, J., Zhong, C., Zhou, W., Zhu, X., H. Zhu, Y., 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
High Energy Physics - Experiment (hep-ex), Nuclear Theory, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, High Energy Physics - Experiment
Abstract

We present results on strange and multi-strange particle production in Au+Au collisions at $\sqrt{s_{NN}}=62.4$ GeV as measured with the STAR detector at RHIC. Mid-rapidity transverse momentum spectra and integrated yields of $K^{0}_{S}$, $\Lambda$, $\Xi$, $\Omega$ and their anti-particles are presented for different centrality classes. The particle yields and ratios follow a smooth energy dependence. Chemical freeze-out parameters, temperature, baryon chemical potential and strangeness saturation factor obtained from the particle yields are presented. Intermediate transverse momentum ($p_T$) phenomena are discussed based on the ratio of the measured baryon-to-meson spectra and nuclear modification factor. The centrality dependence of various measurements presented show a similar behavior as seen in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV., Comment: STAR collaboration paper, 17 pages, 17 figures

Published
2011

3. Measurement of the parity-violating longitudinal single-spin asymmetry for $W^{\pm}$ boson production in polarized proton-proton collisions at $\sqrt{s} = 500 $GeV

Author

Aggarwal, M.M., Ahammed, Z., Alakhverdyants, A.V., Alekseev, I., Alford, J., Anderson, B.D., Anson, C.D., Arkhipkin, D., Averichev, G.S., Balewski, J., Beavis, D.R., Bellwied, R., Betancourt, M.J., Betts, R.R., Bhasin, A., K. Bhati, A., Bichsel, H., Bielcik, J., Bielcikova, J., Biritz, B., C. Bland, L., Borowski, W., Bouchet, J., Braidot, E., V. Brandin, A., Bridgeman, A., G. Brovko, S., Bruna, E., Bueltmann, S., Bunzarov, I., P. Burton, T., Z. Cai, X., Caines, H., Calder On De La Barca S Anchez, M., Cebra, D., Cendejas, R., C. Cervantes, M., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., F. Chen, H., H. Chen, J., Y. Chen, J., Cheng, J., Cherney, M., Chikanian, A., E. Choi, K., Christie, W., Chung, P., J. M. Codrington, M., Corliss, R., G. Cramer, J., J. Crawford, H., Dash, S., Davila Leyva, A., C. De Silva, L., Debbe, R.R., G. Dedovich, T., A. Derevschikov, A., Derradi De Souza, R., Didenko, L., Djawotho, P., M. Dogra, S., Dong, X., L. Drachenberg, J., E. Draper, J., C. Dunlop, J., R. Dutta Mazumdar, M., G. E., L., Elnimr, M., Engelage, J., Eppley, G., Erazmus, B., Estienne, Magali, Eun, L., Evdokimov, O., Fatemi, R., Fedorisin, J., G. Fersch, R., Finch, E., Fine, V., Fisyak, Y., Gagliardi, C.A., R. Gangadharan, D., S. Ganti, M., Geromitsos, A., Geurts, F., Ghosh, P., N. Gorbunov, Y., Gordon, A., Grebenyuk, O., Grosnick, D., M. Guertin, S., Gupta, Anupam, Guryn, W., Haag, B., Hamed, A., Han, L.-X., W. Harris, J., P. Hays-Wehle, J., Heinz, M., Heppelmann, S., Hirsch, A., Hjort, E., W. Ho, G., J. Hofman, D., Huang, B., Z. Huang, H., J. Humanic, T., Huo, L., Igo, G., Jacobs, P., Jacobs, W.W., Jena, C., Jin, F., Joseph, J., G. Judd, E., Kabana, S., Kang, K., Kapitan, J., Kauder, K., Keane, D., Kechechyan, A., Kettler, D., P. Kikola, D., Kiryluk, J., Kisiel, A., Kizka, V., R. Klein, S., G. Knospe, A., Kocoloski, A., D. Koetke, 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., M. Landgraf, J., Lapointe, S., Lauret, J., Lebedev, A., Lednicky, R., Lee, C.-H., H. Lee, J., Leight, W., J. Levine, M., Li, C., Li, L., Li, N., Li, W., Li, Xiaojian, Li, Y., M. Li, Z., A. Lisa, M., Liu, Franklin, Liu, Hong, Liu, J., Ljubicic, T., J. Llope, W., S. Longacre, R., Love, W.A., Lu, Y., V. Lukashov, E., Luo, X., L. Ma, G., G. Ma, Y., P. Mahapatra, D., Majka, R., I. Mall, O., K. Mangotra, L., Manweiler, R., Margetis, S., Markert, C., Masui, H., S. Matis, H., A. Matulenko, Yu., Mcdonald, D., S. Mcshane, T., Meschanin, A., Milner, R., G. Minaev, N., Mioduszewski, S., Mischke, A., K. Mitrovski, M., Mohanty, B., M. Mondal, M., Morozov, B., Morozov, D.A., G. Munhoz, M., Naglis, M., K. Nandi, B., K. Nayak, T., K. Netrakanti, P., J. Ng, M., V. Nogach, L., B. Nurushev, S., Odyniec, G., Ogawa, A., Okorokov, V., W. Oldag, E., Olson, D., Pachr, M., S. Page, B., K. Pal, S., Pandit, Y., Panebratsev, Y., Pawlak, T., Peitzmann, T., Perkins, C., Peryt, W., C. Phatak, S., Pile, P., Planinic, M., A. Ploskon, M., Pluta, J., Plyku, D., Poljak, N., M. Poskanzer, A., V. K. S. Potukuchi, B., B. Powell, C., Prindle, D., Pruneau, C., K. Pruthi, N., R. Pujahari, P., Putschke, J., Qiu, H., Raniwala, R., Raniwala, S., L. Ray, R., Redwine, R., Reed, R., G. Ritter, H., B. Roberts, J., V. Rogachevskiy, O., L. Romero, J., Rose, A., Ruan, L., Sakai, S., Sakrejda, I., Sakuma, T., Salur, S., Sandweiss, J., Sangaline, E., Schambach, J., P. Scharenberg, R., M. Schmah, A., Schmitz, N., R. Schuster, T., Seele, J., Seger, J., Selyuzhenkov, I., Seyboth, P., Shahaliev, E., Shao, M., Sharma, M., Shi, S.S., P. Sichtermann, E., Simon, F., N. Singaraju, R., J. Skoby, M., Smirnov, N., Sorensen, P., M. Spinka, H., Srivastava, B., D. S. Stanislaus, T., Staszak, D., R. Stevens, J., Stock, R., Strikhanov, M., Stringfellow, B., A. P. Suaide, A., C. Suarez, M., L. Subba, N., Sumbera, M., M. Sun, X., Sun, Y., Sun, Z., Surrow, B., N. Svirida, D., J. M. Symons, T., Szanto De Toledo, A., Takahashi, J., H. Tang, A., Tang, Z., H. Tarini, L., Tarnowsky, T., Thein, D., H. Thomas, J., Tian, J., R. Timmins, A., Timoshenko, S., Tlusty, D., Tokarev, M., Trainor, T.A., N. Tram, V., Trentalange, S., E. Tribble, R., D. Tsai, O., Ullrich, T., G. Underwood, D., Van Buren, G., Van Leeuwen, M., Van Nieuwenhuizen, G., A. Vanfossen, J., Varma, R., M. S. Vasconcelos, G., N. Vasiliev, A., Videb K, F., P. Viyogi, Y., Vokal, S., Voloshin, S.A., Wada, M., Walker, M., Wang, F., Wang, Gang, Wang, H., S. Wang, J., Wang, Q., L. Wang, X., Wang, Y., Webb, G., C. Webb, J., D. Westfall, G., Whitten Jr., C., Wieman, H., W. Wissink, S., Witt, R., F. Wu, Y., Xie, W., Xu, H., Xu, N., H. Xu, Q., Xu, Wei-Jiang, Xu, Y., Xu, Z., Xue, L., Yang, Y., Yepes, P., Yip, K., Yoo, I.-K., Yue, Q., Zawisza, M., Zbroszczyk, H., Zhan, W., B. Zhang, J., Zhang, S., M. Zhang, W., P. Zhang, X., Zhang, Y., [hep-Ex] Sep, Arxiv:.V, P. Zhang, Z., Zhao, J., Zhong, C., Zhou, W., Zhu, X., H. Zhu, Y., 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
High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, High Energy Physics - Experiment
Abstract

We report the first measurement of the parity violating single-spin asymmetries for midrapidity decay positrons and electrons from $W^{+}$ and $W^{-}$ boson production in longitudinally polarized proton-proton collisions at $\sqrt{s}=500 $GeV by the STAR experiment at RHIC. The measured asymmetries, $A^{W^+}_{L}=-0.27\pm 0.10\;({\rm stat.})\pm 0.02\;({\rm syst.}) \pm 0.03\;({\rm norm.})$ and $A^{W^-}_{L}=0.14\pm 0.19\;({\rm stat.})\pm 0.02 \;({\rm syst.})\pm 0.01\;({\rm norm.})$, are consistent with theory predictions, which are large and of opposite sign. These predictions are based on polarized quark and antiquark distribution functions constrained by polarized DIS measurements., 6 pages, 4 figures, submitted to Physics Review Letters

Published
2011

4. Identified particle production, azimuthal anisotropy, and interferometry measurements in Au+Au collisions at $\sqrt{s_{NN}}$ = 9.2 GeV

Author

Abelev, B.I., Aggarwal, M.M., Ahammed, Z., V. Alakhverdyants, A., D. Anderson, B., Arkhipkin, D., S. Averichev, G., Balewski, J., Barannikova, O., S. Barnby, L., Baumgart, S., R. Beavis, D., Bellwied, R., Benedosso, F., J. Betancourt, M., Betts, R.R., Bhasin, A., K. Bhati, A., Bichsel, H., Bielcik, J., Bielcikova, J., Biritz, B., C. Bland, L., Bnzarov, I., E. Bonner, B., Bouchet, J., Braidot, E., V. Brandin, A., Bridgeman, A., Bruna, E., Bueltmann, S., P. Burton, T., Z. Cai, X., Caines, H., Calder'On De La Barca S'Anchez, M., Catu, O., Cebra, D., Cendejas, R., C. Cervantes, M., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., F. Chen, H., H. Chen, J., Y. Chen, J., Cheng, J., Cherney, M., Chikanian, A., E. Choi, K., Christie, W., Chung, P., F. Clarke, R., J. M. Codrington, M., Corliss, R., G. Cramer, J., J. Crawford, H., Das, D., Dash, S., C. De Silva, L., Debbe, R.R., G. Dedovich, T., Dephillips, M., A. Derevschikov, A., Derradi De Souza, R., Didenko, L., Djawotho, P., M. Dogra, S., Dong, X., L. Drachenberg, J., E. Draper, J., C. Dunlop, J., R. Dutta Mazumdar, M., G. Efimov, L., Elhalhuli, E., Elnimr, M., Engelage, J., Eppley, G., Erazmus, B., Estienne, Magali, Eun, L., Fachini, P., Fatemi, R., Fedorisin, J., G. Fersch, R., Filip, P., Finch, E., Fine, V., Fisyak, Y., Gagliardi, C.A., R. Gangadharan, D., S. Ganti, M., J. Garcia-Solis, E., Geromitsos, A., Geurts, F., Ghazikhanian, V., Ghosh, P., N. Gorbunov, Y., Gordon, A., Grebenyuk, O., Grosnick, D., Grube, B., M. Guertin, S., Gupta, Anupam, Gupta, N., Guryn, W., Haag, B., J. Hallman, T., Hamed, A., Han, L.-X., W. Harris, J., P. Hays-Wehle, J., Heinz, M., Heppelmann, S., Hirsch, A., Hjort, E., M. Hoffman, A., W. Hoffmann, G., J. Hofman, D., S. Hollis, R., Z. Huang, H., J. Humanic, T., Huo, L., Igo, G., Iordanova, A., Jacobs, P., Jacobs, W.W., Jakl, P., Jena, C., Jin, F., L. Jones, C., G. Jones, P., Joseph, J., G. Judd, E., Kabana, S., Kajimoto, K., Kang, K., Kapitan, J., Kauder, K., Keane, D., Kechechyan, A., Kettler, D., Yu. Khodyrev, V., P. Kikola, D., Kiryluk, J., Kisiel, A., R. Klein, S., G. Knospe, A., Kocoloski, A., D. Koetke, D., Kollegger, T., Konzer, J., Kopytine, M., Korsch, W., Kotchenda, L., Kouchpil, V., Kravtsov, P., I. Kravtsov, V., Krueger, K., Krus, M., Kumar, L., Kurnadi, P., Lamont, M.A. C., M. Landgraf, J., Lapointe, S., Lauret, J., Lebedev, A., Lednicky, R., Lee, C.-H., H. Lee, J., Leight, W., J. Levine, M., Li, C., Li, N., Li, Y., Li, Zhenyu, Lin, G., Lin, X., J. Lindenbaum, S., A. Lisa, M., Liu, Franklin, Liu, Hong, Liu, J., Ljubicic, T., J. Llope, W., S. Longacre, R., Love, W.A., Lu, Y., Ludlam, T., L. Ma, G., G. Ma, Y., P. Mahapatra, D., Majka, R., I. Mall, O., K. Mangotra, L., Manweiler, R., Margetis, S., Markert, C., Masui, H., S. Matis, H., A. Matulenko, Yu., Mcdonald, D., S. Mcshane, T., Meschanin, A., Milner, R., G. Minaev, N., Mioduszewski, S., Mischke, A., K. Mitrovski, M., Mohanty, B., Morozov, D.A., G. Munhoz, M., K. Nandi, B., Nattrass, C., K. Nayak, T., M. Nelson, J., K. Netrakanti, P., J. Ng, M., V. Nogach, L., B. Nurushev, S., Odyniec, G., Ogawa, A., Okada, H., Okorokov, V., Olson, D., Pachr, M., S. Page, B., K. Pal, S., Pandit, Y., Panebratsev, Y., Pawlak, T., Peitzmann, T., Perevoztchikov, V., Perkins, C., Peryt, W., C. Phatak, S., Pile, P., Planinic, M., A. Ploskon, M., Pluta, J., Plyku, D., Poljak, N., M. Poskanzer, A., V. K. S. Potukuchi, B., Prindle, D., Pruneau, C., K. Pruthi, N., R. Pujahari, P., Putschke, J., Raniwala, R., Raniwala, S., L. Ray, R., Redwine, R., Reed, R., M. Rehberg, J., Ridiger, A., G. Ritter, H., B. Roberts, J., V. Rogachevskiy, O., L. Romero, J., Rose, A., Roy, C., Ruan, L., J. Russcher, M., Sahoo, R., Sakai, S., Sakrejda, I., Sakuma, T., Salur, S., Sandweiss, J., Schambach, J., P. Scharenberg, R., Schmitz, N., R. Schuster, T., Seele, J., Seger, J., Selyuzhenkov, I., Seyboth, P., Shahaliev, E., Shao, M., Sharma, M., Shi, S.S., P. Sichtermann, E., Simon, F., N. Singaraju, R., J. Skoby, M., Smirnov, N., Sorensen, P., Sowinski, J., M. Spinka, H., Srivastava, B., D. S. Stanislaus, T., Staszak, D., Stock, R., Strikhanov, M., Stringfellow, B., A. P. Suaide, A., C. Suarez, M., L. Subba, N., Sumbera, M., M. Sun, X., Sun, Y., Sun, Z., Surrow, B., J. M. Symons, T., Szanto De Toledo, A., Takahashi, J., H. Tang, A., Tang, Z., H. Tarini, L., Tarnowsky, T., Thein, D., H. Thomas, J., Tian, J., R. Timmins, A., Timoshenko, S., Tlusty, D., Tokarev, M., Trainor, T.A., N. Tram, V., Trentalange, S., E. Tribble, R., D. Tsai, O., Ulery, J., Ullrich, T., G. Underwood, D., Van Buren, G., Van Nieuwenhuizen, G., A. Vanfossen, J., Varma, R., M. S. Vasconcelos, G., N. Vasiliev, A., Videbaek, F., P. Viyogi, Y., Vokal, S., Voloshin, S.A., Wada, M., Walker, M., Wang, F., Wang, Gang, Wang, H., S. Wang, J., Wang, Q., Wang, X., L. Wang, X., Wang, Y., Webb, G., C. Webb, J., D. Westfall, G., Whitten Jr., C., Wieman, H., W. Wissink, S., Witt, R., Wu, Y., Xie, W., Xu, N., H. Xu, Q., Xu, Wei-Jiang, Xu, Y., Xu, Z., Xue, L., Yang, Y., Yepes, P., Yip, K., Yoo, I.-K., Yue, Q., Zawisza, M., Zbroszczyk, H., Zhan, W., Zhang, S., M. Zhang, W., P. Zhang, X., Zhang, Y., P. Zhang, Z., Zhao, Y., 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
Nuclear Theory (nucl-th), High Energy Physics - Experiment (hep-ex), Nuclear Theory, 25.75.-q, 25.75.Dw, 24.85.+p, 25.75.Ld, 25.75.Gz, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, High Energy Physics - Experiment
Abstract

We present the first measurements of identified hadron production, azimuthal anisotropy, and pion interferometry from Au+Au collisions below the nominal injection energy at the Relativistic Heavy-Ion Collider (RHIC) facility. The data were collected using the large acceptance STAR detector at $\sqrt{s_{NN}}$ = 9.2 GeV from a test run of the collider in the year 2008. Midrapidity results on multiplicity density (dN/dy) in rapidity (y), average transverse momentum (), particle ratios, elliptic flow, and HBT radii are consistent with the corresponding results at similar $\sqrt{s_{NN}}$ from fixed target experiments. Directed flow measurements are presented for both midrapidity and forward rapidity regions. Furthermore the collision centrality dependence of identified particle dN/dy, , and particle ratios are discussed. These results also demonstrate the readiness of the STAR detector to undertake the proposed QCD critical point search and the exploration of the QCD phase diagram at RHIC., Comment: 23 pages and 27 figures, Published version

Published
2010

5. Inclusive pi^0, eta, and direct photon production at high transverse momentum in p+p and d+Au collisions at sqrt(s_NN) = 200 GeV

Author

Abelev, B.I., M. Aggarwal, M., Ahammed, Z., V. Alakhverdyants, A., D. Anderson, B., Arkhipkin, D., S. Averichev, G., Balewski, J., Barannikova, O., S. Barnby, L., Baumgart, S., R. Beavis, D., Bellwied, R., Benedosso, F., J. Betancourt, M., Betts, R.R., Bhasin, A., K. Bhati, A., Bichsel, H., Bielcik, J., Bielcikova, J., Biritz, B., C. Bland, L., E. Bonner, B., Bouchet, J., Braidot, E., V. Brandin, A., Bridgeman, A., Bruna, E., Bueltmann, S., Bunzarov, I., P. Burton, T., Z. Cai, X., Caines, H., Calderon De La Barca Sanchez, M., Catu, O., Cebra, D., Cendejas, R., C. Cervantes, M., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., F. Chen, H., H. Chen, J., Y. Chen, J., Cheng, J., Cherney, M., Chikanian, A., E. Choi, K., Christie, W., Chung, P., F. Clarke, R., J. M. Codrington, M., Corliss, R., G. Cramer, J., J. Crawford, H., Das, D., Dash, S., Davila Leyva, A., C. De Silva, L., Debbe, R.R., G. Dedovich, T., Dephillips, M., A. Derevschikov, A., Derradi De Souza, R., Didenko, L., Djawotho, P., M. Dogra, S., Dong, X., L. Drachenberg, J., E. Draper, J., C. Dunlop, J., R. Dutta Mazumdar, M., G. Emov, L., Elhalhuli, E., Elnimr, M., Engelage, J., Eppley, G., Erazmus, B., Estienne, Magali, Eun, L., Fachini, P., Fatemi, R., Fedorisin, J., G. Fersch, R., Filip, P., Finch, E., Fine, V., Fisyak, Y., Gagliardi, C.A., R. Gangadharan, D., S. Ganti, M., J. Garcia-Solis, E., Geromitsos, A., Geurts, F., Ghazikhanian, V., Ghosh, P., N. Gorbunov, Y., Gordon, A., Grebenyuk, O., Grosnick, D., Grube, B., M. Guertin, S., Gupta, Anupam, Gupta, N., Guryn, W., Haag, B., J. Hallman, T., Hamed, A., Han, L.-X., W. Harris, J., P. Hays-Wehle, J., Heinz, M., Heppelmann, S., Hirsch, A., Hjort, E., M. Homan, A., W. Ho_mann, G., J. Hofman, D., S. Hollis, R., Z. Huang, H., J. Humanic, T., Huo, L., Igo, G., Iordanova, A., Jacobs, P., Jacobs, W.W., Jakl, P., Jena, C., Jin, F., L. Jones, C., G. Jones, P., Joseph, J., G. Judd, E., Kabana, S., Kajimoto, K., Kang, K., Kapitan, J., Kauder, K., Keane, D., Kechechyan, A., Kettler, D., P. Kikola, D., Kiryluk, J., Kisiel, A., R. Klein, S., G. Knospe, A., Kocoloski, A., D. Koetke, D., Kollegger, T., Konzer, J., Kopytine, M., Koralt, I., Korsch, W., Kotchenda, L., Kouchpil, V., Kravtsov, P., Krueger, K., Krus, M., Kumar, L., Kurnadi, P., Lamont, M.A. C., M. Landgraf, J., Lapointe, S., Lauret, J., Lebedev, A., Lednicky, R., Lee, C.-H., H. Lee, J., Leight, W., J. Levine, M., Li, C., Li, L., Li, N., Li, W., Li, Xiaojian, Li, Y., Li, Zhenyu, Lin, G., J. Lindenbaum, S., M. A. Lisa,, Liu, Franklin, Liu, Hong, Liu, J., Ljubicic, T., J. Llope, W., S. Longacre, R., Love, W.A., Lu, Y., L. Ma, G., G. Ma, Y., P. Mahapatra, D., Majka, R., I. Mall, O., K. Mangotra, L., Manweiler, R., Margetis, S., Markert, C., Masui, H., S. Matis, H., A. Matulenko, Yu., Mcdonald, D., S. Mcshane, T., Meschanin, A., Milner, R., G. Minaev, N., Mioduszewski, S., Mischke, A., K. Mitrovski, M., Mohanty, B., M. Mondal, M., Morozov, D.A., G. Munhoz, M., K. Nandi, B., Nattrass, C., K. Nayak, T., M. Nelson, J., K. Netrakanti, P., J. Ng, M., V. Nogach, L., B. Nurushev, S., Odyniec, G., Ogawa, A., Okada, H., Okorokov, V., Olson, D., Pachr, M., S. Page, B., K. Pal, S., Pandit, Y., Panebratsev, Y., Pawlak, T., Peitzmann, T., Perevoztchikov, V., Perkins, C., Peryt, W., C. Phatak, S., Pile, P., Planinic, M., A. Ploskon, M., Pluta, J., Plyku, D., Poljak, N., M. Poskanzer, A., V. K. S. Potukuchi, B., B. Powell, C., Prindle, D., Pruneau, C., K. Pruthi, N., R. Pujahari, P., Putschke, J., Raniwala, R., Raniwala, S., L. Ray, R., Redwine, R., Reed, R., M. Rehberg, J., G. Ritter, H., B. Roberts, J., V. Rogachevskiy, O., L. Romero, J., Rose, A., Roy, C., Ruan, L., J. Russcher, M., Sahoo, R., Sakai, S., Sakrejda, I., Sakuma, T., Salur, S., Sandweiss, J., Sangaline, E., Schambach, J., P. Scharenberg, R., Schmitz, N., R. Schuster, T., Seele, J., Seger, J., Selyuzhenkov, I., Seyboth, P., Shahaliev, E., Shao, M., Sharma, M., Shi, S.S., P. Sichtermann, E., Simon, F., N. Singaraju, R., J. Skoby, M., Smirnov, N., Sorensen, P., Sowinski, J., M. Spinka, H., Srivastava, B., D. S. Stanislaus, T., Staszak, D., R. Stevens, J., Stock, R., Strikhanov, M., Stringfellow, B., A. P. Suaide, A., C. Suarez, M., L. Subba, N., Sumbera, M., M. Sun, X., Sun, Y., Sun, Z., Surrow, B., J. M. Symons, T., Szanto De Toledo, A., Takahashi, J., H. Tang, A., Tang, Z., H. Tarini, L., Tarnowsky, T., Thein, D., H. Thomas, J., Tian, J., R. Timmins, A., Timoshenko, S., Tlusty, D., Tokarev, M., Trainor, T.A., N. Tram, V., Trentalange, S., E. Tribble, R., D. Tsai, O., Ulery, J., Ullrich, T., G. Underwood, D., Van Buren, G., Van Nieuwenhuizen, G., A. Vanfossen, J., Varma, R., M. S. Vasconcelos, G., N. Vasiliev, A., Videbaek, F., P. Viyogi, Y., Vokal, S., Voloshin, S.A., Wada, M., Walker, M., Wang, F., Wang, Gang, Wang, H., S. Wang, J., Wang, Q., Wang, X., L. Wang, X., Wang, Y., Webb, G., C. Webb, J., D. Westfall, G., Whitten Jr., C., Wieman, H., Wing_eld, E., W. Wissink, S., Witt, R., Wu, Y., Xie, W., Xu, N., H. Xu, Q., Xu, Wei-Jiang, Xu, Y., Xu, Z., Xue, L., Yang, Y., Yepes, P., Yip, K., Yoo, I.-K., Yue, Q., Zawisza, M., Zbroszczyk, H., Zhan, W., Zhang, S., M. Zhang, W., P. Zhang, X., Zhang, Y., P. Zhang, Z., Zhao, J., Zhong, C., Zhou, J., Zhou, W., Zhu, X., H. Zhu, Y., 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
High Energy Physics - Experiment (hep-ex), 13.85.Ni, 13.85.Qk, 13.87.Fh, 25.75.-q, 25.75.Dw, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment, High Energy Physics - 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 sqrt(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., 28 pages, 30 figures, 6 tables, the updated version that was accepted by Phys. Rev. C

Published
2010

6. Measurement of D* Mesons in Jets from p+p Collisions at sqrt{s} = 200 GeV

Author

I. Abelev, B., M. Aggarwal, M., Ahammed, Z., D. Anderson, B., Arkhipkin, D., S. Averichev, G., Balewski, J., Barannikova, O., S. Barnby, L., Baudot, J., Baumgart, S., R. Beavis, D., Bellwied, R., Benedosso, F., J. Betancourt, M., Betts, R.R., Bhasin, A., K. Bhati, A., Bichsel, H., Bielcik, J., Bielcikova, J., Biritz, B., C. Bland, L., Bombara, M., E. Bonner, B., Botje, M., Bouchet, J., Braidot, E., V. Brandin, A., Bruna, E., Bueltmann, S., P. Burton, T., Bystersky, M., Z. Cai, X., Caines, H., Calderón De La Barca Sánchez, M., Catu, O., Cebra, D., Cendejas, R., C. Cervantes, M., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., F. Chen, H., H. Chen, J., Y. Chen, J., Cheng, J., Cherney, M., Chikanian, A., E. Choi, K., Christie, W., F. Clarke, R., J. M. Codrington, M., Corliss, R., M. Cormier, T., R. Cosentino, M., G. Cramer, J., J. Crawford, H., Das, D., Dash, S., Daugherity, M., C. De Silva, L., G. Dedovich, T., Dephillips, M., A. Derevschikov, A., Derradi De Souza, R., Didenko, L., Djawotho, P., M. Dogra, S., Dong, X., L. Drachenberg, J., E. Draper, J., Du, F., C. Dunlop, J., R. Dutta Mazumdar, M., R. Edwards, W., G. Efimov, L., Elhalhuli, E., Elnimr, M., Emelianov, V., Engelage, J., Eppley, G., Erazmus, B., Estienne, Magali, Eun, L., Fachini, P., Fatemi, R., Fedorisin, J., Feng, A., Filip, P., Finch, E., Fine, V., Fisyak, Y., Gagliardi, C.A., Gaillard, L., R. Gangadharan, D., S. Ganti, M., J. Garcia-Solis, E., Geromitsos, A., Geurts, F., Ghazikhanian, V., Ghosh, P., N. Gorbunov, Y., Gordon, A., Grebenyuk, O., Grosnick, D., Grube, B., M. Guertin, S., S. F. F. Guimaraes, K., Gupta, Anupam, Gupta, N., Guryn, W., Haag, B., J. Hallman, T., Hamed, A., W. Harris, J., He, W., Heinz, M., Heppelmann, S., Hippolyte, B., Hirsch, A., Hjort, E., M. Hoffman, A., W. Hoffmann, G., J. Hofman, D., S. Hollis, R., Z. Huang, H., J. Humanic, T., Igo, G., Iordanova, A., Jacobs, P., Jacobs, W.W., Jakl, P., Jena, C., Jin, F., L. Jones, C., G. Jones, P., Joseph, J., G. Judd, E., Kabana, S., Kajimoto, K., Kang, K., Kapitan, J., Keane, D., Kechechyan, A., Kettler, D., Yu. Khodyrev, V., P. Kikola, D., Kiryluk, J., Kisiel, A., R. Klein, S., G. Knospe, A., Kocoloski, A., D. Koetke, D., Kopytine, M., Korsch, W., Kotchenda, L., Kouchpil, V., Kravtsov, P., I. Kravtsov, V., Krueger, K., Krus, M., Kuhn, C., Kumar, L., Kurnadi, P., Lamont, M.A. C., M. Landgraf, J., Lapointe, S., Lauret, J., Lebedev, A., Lednicky, R., Lee, C.-H., H. Lee, J., Leight, W., J. Levine, M., Li, N., Li, C., Li, Y., Lin, G., J. Lindenbaum, S., A. Lisa, M., Liu, Franklin, Liu, J., Liu, L., Ljubicic, T., J. Llope, W., S. Longacre, R., Love, W.A., Lu, Y., Ludlam, T., L. Ma, G., G. Ma, Y., P. Mahapatra, D., Majka, R., I. Mall, O., K. Mangotra, L., Manweiler, R., Margetis, S., Markert, C., S. Matis, H., A. Matulenko, Yu., S. Mcshane, T., Meschanin, A., Milner, R., G. Minaev, N., Mioduszewski, S., Mischke, A., Mitchell, J., Mohanty, B., Morozov, D.A., G. Munhoz, M., K. Nandi, B., Nattrass, C., K. Nayak, T., M. Nelson, J., K. Netrakanti, P., J. Ng, M., V. Nogach, L., B. Nurushev, S., Odyniec, G., Ogawa, A., Okada, H., Okorokov, V., Olson, D., Pachr, M., S. Page, B., K. Pal, S., Pandit, Y., Panebratsev, Y., Pawlak, T., Peitzmann, T., Perevoztchikov, V., Perkins, C., Peryt, W., C. Phatak, S., Planinic, M., Pluta, J., Poljak, N., M. Poskanzer, A., V. K. S. Potukuchi, B., Prindle, D., Pruneau, C., K. Pruthi, N., Putschke, J., Raniwala, R., Raniwala, S., L. Ray, R., Redwine, R., Reed, R., Ridiger, A., G. Ritter, H., B. Roberts, J., V. Rogachevskiy, O., L. Romero, J., Rose, A., Roy, C., Ruan, L., J. Russcher, M., Sahoo, R., Sakrejda, I., Sakuma, T., Salur, S., Sandweiss, J., Sarsour, M., Schambach, J., P. Scharenberg, R., Schmitz, N., Seger, J., Selyuzhenkov, I., Seyboth, P., Shabetai, Alexandre, Shahaliev, E., Shao, M., Sharma, M., Shi, S.S., Shi, X.-H., P. Sichtermann, E., Simon, F., N. Singaraju, R., J. Skoby, M., Smirnov, N., Snellings, R., Sorensen, P., Sowinski, J., M. Spinka, H., Srivastava, B., Stadnik, A., D. S. Stanislaus, T., Staszak, D., Strikhanov, M., Stringfellow, B., A. P. Suaide, A., C. Suarez, M., L. Subba, N., Sumbera, M., M. Sun, X., Sun, Y., Sun, Z., Surrow, B., J. M. Symons, T., Szanto De Toledo, A., Takahashi, J., H. Tang, A., Tang, Z., Tarnowsky, T., Thein, D., H. Thomas, J., Tian, J., R. Timmins, A., Timoshenko, S., Tlusty, D., Tokarev, M., Trainor, T.A., N. Tram, V., L. Trattner, A., Trentalange, S., E. Tribble, R., D. Tsai, O., Ulery, J., Ullrich, T., G. Underwood, D., Van Buren, G., Van Leeuwen, M., M. Vander Molen, A., A. Vanfossen, J., Varma, R., M. S. Vasconcelos, G., M. Vasilevski, I., N. Vasiliev, A., Videbaek, F., E. Vigdor, S., P. Viyogi, Y., Vokal, S., Voloshin, S.A., Wada, M., T. Waggoner, W., Walker, M., Wang, F., Wang, Gang, S. Wang, J., Wang, Q., Wang, X., L. Wang, X., Wang, Y., Webb, G., C. Webb, J., D. Westfall, G., Whitten, C., Wieman, H., W. Wissink, S., Witt, R., Wu, Y., Xie, W., Xu, N., H. Xu, Q., Xu, Y., Xu, Z., Yang, Y., Yepes, P., Yoo, I.-K., Yue, Q., Zawisza, M., Zbroszczyk, H., Zhan, W., Zhang, S., M. Zhang, W., P. Zhang, X., Zhang, Y., P. Zhang, Z., Zhao, Y., Zhong, C., Zhou, J., Zoulkarneev, R., Zoulkarneeva, Y., J. X. Zuo, And, Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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 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)

Subjects
High Energy Physics - Experiment (hep-ex), 13.85.Ni, 13.25.Ft, 13.87.Fh, Nuclear Theory, High Energy Physics::Phenomenology, FOS: Physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, High Energy Physics - Experiment
Abstract

We report the measurement of charged $D^*$ mesons in inclusive jets produced in proton-proton collisions at a center of mass energy $\sqrt{s}$ = 200 GeV with the STAR experiment at RHIC. For $D^{*}$ mesons with fractional momenta $0.2 < z < 0.5$ in inclusive jets with 11.5 GeV mean transverse energy, the production rate is found to be $N(D^{*+}+D^{*-})/N(\mathrm{jet}) = 0.015 \pm 0.008 (\mathrm{stat}) \pm 0.007 (\mathrm{sys})$. This rate is consistent with perturbative QCD evaluation of gluon splitting into a pair of charm quarks and subsequent hadronization., 7 pages, 4 figures

Published
2009

7. Observation of Two-source Interference in the Photoproduction Reaction $Au Au \to Au Au \rho^0$

Author

Abelev, B.I., Aggarwal, M.M., Ahammed, Z., Anderson, B.D., Arkhipkin, D., Averichev, G.S., Bai, Y., Balewski, J., Barannikova, O., Barnby, L.S., Baudot, J., Baumgart, S., R. Beavis, D., Bellwied, R., Benedosso, F., Betancourt, M.J., Betts, R.R., Bhardwaj, S., Bhasin, A., Bhati, A.K., Bichsel, H., Bielcik, J., Bielcikova, J., Biritz, B., Bland, L.C., Bombara, M., E. Bonner, B., Botje, M., Bouchet, J., Braidot, E., V. Brandin, A., Bruna, E., Bueltmann, S., P. Burton, T., Bystersky, M., Z. Cai, X., Caines, H., Calderon De La Barca Sanchez, M., Callner, J., Catu, O., Cebra, D., Cendejas, R., C. Cervantes, M., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., F. Chen, H., H. Chen, J., Y. Chen, J., Cheng, J., Cherney, M., Chikanian, A., E. Choi, K., Christie, W., U. Chung, S., F. Clarke, R., J. M. Codrington, M., P. Coffin, J., Corliss, R., M. Cormier, T., R. Cosentino, M., G. Cramer, J., J. Crawford, H., Das, D., Dash, S., Daugherity, M., De Silva, C., G. Dedovich, T., Dephillips, M., A. Derevschikov, A., Derradi De Souza, R., Didenko, L., Djawotho, P., M. Dogra, S., Dong, X., L. Drachenberg, J., E. Draper, J., Du, F., C. Dunlop, J., R. Dutta Mazumdar, M., R. Edwards, W., G. Efimov, L., Elhalhuli, E., Elnimr, M., Emelianov, V., Engelage, J., Eppley, G., Erazmus, B., Estienne, Magalie, Eun, L., Fachini, P., Fatemi, R., Fedorisin, J., Feng, A., Filip, P., Finch, E., Fine, V., Fisyak, Y., Gagliardi, C.A., Gaillard, L., R. Gangadharan, D., S. Ganti, M., Garcia-Solis, E., Ghazikhanian, V., Ghosh, P., N. Gorbunov, Y., Gordon, A., Grebenyuk, O., Grosnick, D., Grube, B., M. Guertin, S., S. F. F. Guimaraes, K., Gupta, Anupam, Gupta, N., Guryn, W., Haag, B., J. Hallman, T., Hamed, A., W. Harris, J., He, W., Heinz, M., Heppelmann, S., Hippolyte, B., Hirsch, A., Hjort, E., M. Hoffman, A., W. Hoffmann, G., J. Hofman, D., S. Hollis, R., Z. Huang, H., J. Humanic, T., Igo, G., Iordanova, A., Jacobs, P., Jacobs, W.W., Jakl, P., Jin, F., L. Jones, C., G. Jones, P., Joseph, J., G. Judd, E., Kabana, S., Kajimoto, K., Kang, K., Kapitan, J., Kaplan, M., Keane, D., Kechechyan, A., Kettler, D., Yu. Khodyrev, V., P. Kikola, D., Kiryluk, J., Kisiel, A., R. Klein, S., G. Knospe, A., Kocoloski, A., D. Koetke, D., Kopytine, M., Kotchenda, L., Kouchpil, V., Kravtsov, P., I. Kravtsov, V., Krueger, K., Krus, M., Kuhn, C., Kumar, L., Kurnadi, P., Lamont, M.A. C., M. Landgraf, J., Lapointe, S., Lauret, J., Lebedev, A., Lednicky, R., Lee, C.-H., Leight, W., J. Levine, M., Li, C., Li, Y., Lin, G., J. Lindenbaum, S., A. Lisa, M., Liu, F., Liu, Hong, Liu, J., Liu, L., Ljubicic, T., J. Llope, W., S. Longacre, R., Love, W.A., Lu, Y., Ludlam, T., Lynn, D., L. Ma, G., G. Ma, Y., P. Mahapatra, D., Majka, R., I. Mall, O., K. Mangotra, L., Manweiler, R., Margetis, S., Markert, C., S. Matis, H., A. Matulenko, Yu., S. Mcshane, T., Meschanin, A., Milner, R., G. Minaev, N., Mioduszewski, S., Mischke, A., Mitchell, J., Mohanty, B., Morozov, D.A., G. Munhoz, M., K. Nandi, B., Nattrass, C., K. Nayak, T., M. Nelson, J., Nepali, C., K. Netrakanti, P., J. Ng, M., V. Nogach, L., B. Nurushev, S., Odyniec, G., Ogawa, A., Okada, H., Okorokov, V., Olson, D., Pachr, M., S. Page, B., K. Pal, S., Pandit, Y., Panebratsev, Y., Pawlak, T., Peitzmann, T., Perevoztchikov, V., Perkins, C., Peryt, W., C. Phatak, S., Planinic, M., Pluta, J., Poljak, N., M. Poskanzer, A., V. K. S. Potukuchi, B., Prindle, D., Pruneau, C., K. Pruthi, N., Putschke, J., Raniwala, R., Raniwala, S., L. Ray, R., Redwine, R., Reed, R., Ridiger, A., G. Ritter, H., B. Roberts, J., V. Rogachevskiy, O., L. Romero, J., Rose, A., Roy, C., Ruan, L., J. Russcher, M., Rykov, V., Sahoo, R., Sakrejda, I., Sakuma, T., Salur, S., Sandweiss, J., Sarsour, M., Schambach, J., P. Scharenberg, R., Schmitz, N., Seger, J., Selyuzhenkov, I., Seyboth, P., Shabetai, Alexandre, Shahaliev, E., Shao, M., Sharma, M., Shi, S.S., Shi, X.-H., P. Sichtermann, E., Simon, F., N. Singaraju, R., J. Skoby, M., Smirnov, N., Snellings, R., Sorensen, P., Sowinski, J., M. Spinka, H., Srivastava, B., Stadnik, A., D. S. Stanislaus, T., Staszak, D., Strikhanov, M., Stringfellow, B., A. P. Suaide, A., C. Suarez, M., L. Subba, N., Sumbera, M., M. Sun, X., Sun, Y., Sun, Z., Surrow, B., J. M. Symons, T., Szanto De Toledo, A., Takahashi, J., H. Tang, A., Tang, Z., Tarnowsky, T., Thein, D., H. Thomas, J., Tian, J., R. Timmins, A., Timoshenko, S., Tlusty, D., Tokarev, M., Trainor, T.A., N. Tram, V., L. Trattner, A., Trentalange, S., E. Tribble, R., D. Tsai, O., Ulery, J., Ullrich, T., G. Underwood, D., Van Buren, G., Van Leeuwen, M., M. Vander Molen, A., A. Vanfossen, J., Varma, R., M. S. Vasconcelos, G., M. Vasilevski, I., N. Vasiliev, A., Videbaek, F., E. Vigdor, S., P. Viyogi, Y., Vokal, S., Voloshin, S.A., Wada, M., T. Waggoner, W., Walker, M., Wang, F., Wang, G., S. Wang, J., Wang, Q., Wang, X., L. Wang, X., Wang, Y., C. Webb, J., D. Westfall, G., Whitten Jr., C., Wieman, H., W. Wissink, S., Witt, R., Wu, Y., Xie, W., Xu, N., H. Xu, Q., Xu, Y., Xu, Z., Yepes, P., Yoo, I.-K., Yue, Q., Zawisza, M., Zbroszczyk, H., Zhan, W., Zhang, H., Zhang, S., M. Zhang, W., Zhang, Y., P. Zhang, Z., Zhao, Y., Zhong, C., Zhou, J., Zoulkarneev, R., Zoulkarneeva, Y., X. Zuo, J., Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), STAR, and 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)

Subjects
Quantum Physics, [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, High Energy Physics - Experiment
Abstract

In ultra-peripheral relativistic heavy-ion collisions, a photon from the electromagnetic field of one nucleus can fluctuate to a quark-antiquark pair and scatter from the other nucleus, emerging as a $\rho^0$. The $\rho^0$ production occurs in two well-separated (median impact parameters of 20 and 40 fermi for the cases considered here) nuclei, so the system forms a 2-source interferometer. At low transverse momenta, the two amplitudes interfere destructively, suppressing $\rho^0$ production. Since the $\rho^0$ decay before the production amplitudes from the two sources can overlap, the two-pion system can only be described with an entangled non-local wave function, and is thus an example of the Einstein-Podolsky-Rosen paradox. We observe this suppression in 200 GeV per nucleon-pair gold-gold collisions. The interference is $87% \pm 5% {\rm (stat.)}\pm 8%$ (syst.) of the expected level. This translates into a limit on decoherence due to wave function collapse or other factors, of 23% at the 90% confidence level., Comment: Slightly revised version, to appear in PRL. 6 pages with 4 figures

Published
2009

8. Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV

Author

I. Abelev, B., M. Aggarwal, M., Ahammed, Z., D. Anderson, B., Arkhipkin, D., S. Averichev, G., Bai, Y., Balewski, J., Barannikova, O., S. Barnby, L., Baudot, J., Baumgart, S., R. Beavis, D., Bellwied, R., Benedosso, F., Betts, R.R., Bhardwaj, S., Bhasin, A., K. Bhati, A., Bichsel, H., Bielcik, J., Bielcikova, J., C. Bland, L., Blyth, S.-L., Bombara, M., E. Bonner, B., Botje, M., Bouchet, J., Braidot, E., V. Brandin, A., Bueltmann, S., P. Burton, T., Bystersky, M., Z. Cai, X., Caines, H., Calderón De La Barca Sánchez, M., Callner, J., Catu, O., Cebra, D., C. Cervantes, M., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., F. Chen, H., H. Chen, J., Y. Chen, J., Cheng, J., Cherney, M., Chikanian, A., E. Choi, K., Christie, W., U. Chung, S., F. Clarke, R., J. M. Codrington, M., P. Coffin, J., M. Cormier, T., R. Cosentino, M., G. Cramer, J., J. Crawford, H., Das, D., Dash, S., Daugherity, M., M. De Moura, M., G. Dedovich, T., Dephillips, M., A. Derevschikov, A., Derradi De Souza, R., Didenko, L., Dietel, T., Djawotho, P., M. Dogra, S., Dong, X., L. Drachenberg, J., E. Draper, J., Du, F., C. Dunlop, J., R. Dutta Mazumdar, M., R. Edwards, W., G. Efimov, L., Elhalhuli, E., Emelianov, V., Engelage, J., Eppley, G., Erazmus, B., Estienne, Magalie, Eun, L., Fachini, P., Fatemi, R., Fedorisin, J., Feng, A., Filip, P., Finch, E., Fine, V., Fisyak, Y., Fu, J., Gagliardi, C.A., Gaillard, L., S. Ganti, M., Garcia-Solis, E., Ghazikhanian, V., Ghosh, P., N. Gorbunov, Y., Gordon, A., Gos, H., Grebenyuk, O., Grosnick, D., Grube, B., M. Guertin, S., S. F. F. Guimaraes, K., Gupta, Anupam, Gupta, N., Guryn, W., Haag, B., J. Hallman, T., Hamed, A., W. Harris, J., He, W., Heinz, M., W. Henry, T., Heppelmann, S., Hippolyte, B., Hirsch, A., Hjort, E., M. Hoffman, A., W. Hoffmann, G., J. Hofman, D., S. Hollis, R., J. Horner, M., Z. Huang, H., W. Hughes, E., J. Humanic, T., Igo, G., Iordanova, A., Jacobs, P., Jacobs, W.W., Jakl, P., Jin, F., G. Jones, P., G. Judd, E., Kabana, S., Kajimoto, K., Kang, K., Kapitan, J., Kaplan, M., Keane, D., Kechechyan, A., Kettler, D., Yu. Khodyrev, V., Kiryluk, J., Kisiel, A., R. Klein, S., G. Knospe, A., Kocoloski, A., D. Koetke, D., Kollegger, T., Kopytine, M., Kotchenda, L., Kouchpil, V., L. Kowalik, K., Kravtsov, P., I. Kravtsov, V., Krueger, K., Kuhn, C., Kumar, A., Kurnadi, P., Lamont, M.A. C., M. Landgraf, J., Langdon, J., Lange, S., Lapointe, S., Laue, F., Lauret, J., Lebedev, A., Lednicky, R., Lee, C.-H., J. Levine, M., Li, C., Li, Q., Li, Y., Lin, G., Lin, X., J. Lindenbaum, S., A. Lisa, M., Liu, F., Liu, Hong, Liu, J., Liu, L., Ljubicic, T., J. Llope, W., S. Longacre, R., Love, W.A., Lu, Y., Ludlam, T., Lynn, D., L. Ma, G., G. Ma, J., G. Ma, Y., P. Mahapatra, D., Majka, R., K. Mangotra, L., Manweiler, R., Margetis, S., Markert, C., S. Matis, H., A. Matulenko, Yu., S. Mcshane, T., Meschanin, A., Millane, J., Miller, Christian, L. Miller, M., G. Minaev, N., Mioduszewski, S., Mischke, A., Mitchell, J., Mohanty, B., Morozov, D.A., G. Munhoz, M., K. Nandi, B., Nattrass, C., K. Nayak, T., M. Nelson, J., Nepali, C., K. Netrakanti, P., J. Ng, M., V. Nogach, L., B. Nurushev, S., Odyniec, G., Ogawa, A., Okada, H., Okorokov, V., Olson, D., Pachr, M., K. Pal, S., Panebratsev, Y., I. Pavlinov, A., Pawlak, T., Peitzmann, T., Perevoztchikov, V., Perkins, C., Peryt, W., C. Phatak, S., Planinic, M., Pluta, J., Poljak, N., Porile, N., M. Poskanzer, A., Potekhin, M., V. K. S. Potukuchi, B., Prindle, D., Pruneau, C., K. Pruthi, N., Putschke, J., A. Qattan, I., Rakness, G., Raniwala, R., Raniwala, S., L. Ray, R., Relyea, D., Ridiger, A., G. Ritter, H., B. Roberts, J., V. Rogachevskiy, O., L. Romero, J., Rose, A., Roy, C., Ruan, L., J. Russcher, M., Rykov, V., Sahoo, R., Sakrejda, I., Sakuma, T., Salur, S., Sandweiss, J., Sarsour, M., Schambach, J., P. Scharenberg, R., Schmitz, N., Seger, J., Selyuzhenkov, I., Seyboth, P., Shabetai, Alexandre, Shahaliev, E., Shao, M., Sharma, M., Shi, X.-H., P. Sichtermann, E., Simon, F., N. Singaraju, R., J. Skoby, M., Smirnov, N., Snellings, R., Sorensen, P., Sowinski, J., Speltz, J., M. Spinka, H., Srivastava, B., Stadnik, A., D. S. Stanislaus, T., Staszak, D., Stock, R., Strikhanov, M., Stringfellow, B., A. P. Suaide, A., C. Suarez, M., L. Subba, N., Sumbera, M., M. Sun, X., Sun, Z., Surrow, B., J. M. Symons, T., Szanto De Toledo, A., Takahashi, J., H. Tang, A., Tang, Z., Tarnowsky, T., Tatarowicz, J., Thein, D., H. Thomas, J., Tian, J., R. Timmins, A., Timoshenko, S., Tokarev, M., Trainor, T.A., N. Tram, V., L. Trattner, A., Trentalange, S., E. Tribble, R., D. Tsai, O., Ulery, J., Ullrich, T., G. Underwood, D., Van Buren, G., Van Der Kolk, N., Van Leeuwen, M., M. Vander Molen, A., Varma, R., M. S. Vasconcelos, G., M. Vasilevski, I., N. Vasiliev, A., Vernet, R., Videbaek, F., E. Vigdor, S., P. Viyogi, Y., Vokal, S., Voloshin, S.A., Wada, M., T. Waggoner, W., Wang, F., Wang, G., S. Wang, J., Wang, Q., Wang, X., L. Wang, X., Wang, Y., C. Webb, J., D. Westfall, G., Whitten, C., Wieman, H., W. Wissink, S., Witt, R., Wu, J., Wu, Y., Xu, N., H. Xu, Q., Xu, Z., Yepes, P., Yoo, I.-K., Yue, Q., Zachariou, N., Zawisza, M., Zhan, W., Zhang, H., Zhang, S., M. Zhang, W., Zhang, Y., P. Zhang, Z., Zhao, Y., Zhong, C., Zhou, J., Zoulkarneev, R., Zoulkarneeva, Y., X. Zuo, J., Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), STAR, and 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)

Subjects
High Energy Physics - Experiment (hep-ex), High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, 13.88.+e, 13.85.Ni, 12.38.Qk, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment, High Energy Physics - Experiment
Abstract

We report precision measurements of the Feynman-x dependence, and first measurements of the transverse momentum dependence, of transverse single spin asymmetries for the production of \pi^0 mesons from polarized proton collisions at \sqrt{s}=200 GeV. The x_F dependence of the results is in fair agreement with perturbative QCD model calculations that identify orbital motion of quarks and gluons within the proton as the origin of the spin effects. Results for the p_T dependence at fixed x_F are not consistent with pQCD-based calculations., Comment: 6 pages, 4 figures

Published
2008

9. Longitudinal Double-Spin Asymmetry and Cross Section for Inclusive Jet Production in Polarized Proton Collisions at $\sqrt{s}$ =200 GeV

Author

I. Abelev, B., M. Aggarwal, M., Ahammed, Z., Amonett, J., D. Anderson, B., Anderson, M., Arkhipkin, D., S. Averichev, G., Bai, Y., Balewski, J., Barannikova, O., S. Barnby, L., Baudot, J., Bekele, S., V. Belaga, V., Bellingeri-Laurikainen, A., Bellwied, R., Benedosso, F., Bhardwaj, S., Bhasin, A., K. Bhati, A., Bichsel, H., Bielcik, J., Bielcikova, J., C. Bland, L., Blyth, S.-L., E. Bonner, B., Botje, M., Bouchet, J., V. Brandin, A., Bravar, A., P. Burton, T., Bystersky, M., V. Cadman, R., Z. Cai, X., Caines, H., Calderón De La Barca Sánchez, M., Castillo, J., Catu, O., Cebra, D., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., F. Chen, H., H. Chen, J., Cheng, J., Cherney, M., Chikanian, A., Christie, W., Coffin, J.P., M. Cormier, T., R. Cosentino, M., G. Cramer, J., J. Crawford, H., Das, D., Das, S., Dash, S., Daugherity, M., M. De Moura, M., G. Dedovich, T., Dephillips, M., A. Derevschikov, A., Didenko, L., Dietel, T., Djawotho, P., M. Dogra, S., J. Dong, W., Dong, X., E. Draper, J., Du, F., B. Dunin, V., C. Dunlop, J., R. Dutta Mazumdar, M., Eckardt, V., R. Edwards, W., G. Efimov, L., Emelianov, V., Engelage, J., Eppley, G., Erazmus, B., Estienne, Magali, Fachini, P., Fatemi, R., Fedorisin, J., Filip, P., Finch, E., Fine, V., Fisyak, Y., Fu, J., Gagliardi, C.A., Gaillard, L., S. Ganti, M., Ghazikhanian, V., Ghosh, P., E. Gonzalez, J., G. Gorbunov, Y., Gos, H., Grebenyuk, O., Grosnick, D., M. Guertin, S., S. F. F. Guimaraes, K., Gupta, N., D. Gutierrez, T., Haag, B., J. Hallman, T., Hamed, A., W. Harris, J., He, W., Heinz, M., W. Henry, T., Hepplemann, S., Hippolyte, B., Hirsch, A., Hjort, E., M. Hoffman, A., W. Hoffmann, G., J. Horner, M., Z. Huang, H., L. Huang, S., W. Hughes, E., J. Humanic, T., Igo, G., Jacobs, P., Jacobs, W.W., Jakl, P., Jia, F., Jiang, H., G. Jones, P., G. Judd, E., Kabana, S., Kang, K., Kapitan, J., Kaplan, M., Keane, D., Kechechyan, A., Yu. Khodyrev, V., C. Kim, B., Kiryluk, J., Kisiel, A., M. Kislov, E., R. 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Wang, J., L. Wang, X., Wang, Y., W. Watson, J., C. Webb, J., D. Westfall, G., Wetzler, A., Whitten, C., Wieman, H., W. Wissink, S., Witt, R., Wood, J., Wu, J., Xu, N., H. Xu, Q., Xu, Z., Yepes, P., Yoo, I.-K., I. Yurevich, V., Zhan, W., Zhang, H., M. Zhang, W., Zhang, Y., P. Zhang, Z., Zhao, Y., Zhong, C., Zoulkarneev, R., Zoulkarneeva, Y., N. Zubarev, A., X. Zuo, J., Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), STAR, and 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)

Subjects
High Energy Physics - Experiment (hep-ex), PAIR, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, PHOTOPRODUCTION, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, High Energy Physics::Experiment, 13.87.Ce, 12.38.Qk, 13.85.Hd, 13.88.+e, Nuclear Experiment, NUCLEON, High Energy Physics - Experiment
Abstract

We report a measurement of the longitudinal double-spin asymmetry A_LL and the differential cross section for inclusive midrapidity jet production in polarized proton collisions at sqrt(s)=200 GeV. The cross section data cover transverse momenta 5 < pT < 50 GeV/c and agree with next-to-leading order perturbative QCD evaluations. The A_LL data cover 5 < pT < 17 GeV/c and disfavor at 98% C.L. maximal positive gluon polarization in the polarized nucleon., 6 pages, 3 figures. Minor changes from review process in Phys. Rev. Lett. Plain text tables of data in STAR publications may be found at http://www.star.bnl.gov/central/publications/

Published
2006

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