Author: "Hoffman AM" - Searchworks@Jio Institute Digital Library Search Results

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197 results on '"Hoffman AM"'

1. The Lick Observatory Supernova Search follow-up program: photometry data release of 70 SESNe

Author: Zheng, WK, Zheng, WK, Stahl, BE, De Jaeger, T, Filippenko, AV, Wang, SQ, Gan, WP, Brink, TG, Altunin, I, Baer-Way, R, Bigley, A, Blanchard, K, Blanchard, PK, Bradley, J, Cargill, SK, Casper, C, Chapman, T, Chander, V, Channa, S, Choi, BY, Choksi, N, Chu, M, Clubb, KI, Cohen, DP, Dalba, PA, Degraw, A, De Kouchkovsky, M, Ellison, M, Falcon, E, Fox, OD, Fuller, K, Ganeshalingam, M, Girish, N, Gould, C, Halevi, G, Halle, A, Hayakawa, KT, Hardy, R, Hestenes, J, Hoffman, AM, Hyland, M, Jeffers, BT, Jennings, C, Kandrashoff, MT, Khodanian, A, Kim, M, Kim, H, Kislak, ME, Krishnan, D, Kumar, S, Kumar, SG, Leja, J, Leonard, EJ, Li, GZ, Li, W, Lian, JS, Liu, E, Lowe, TB, Lu, P, Ma, E, Mason, MN, May, M, McAllister, K, McGinness, E, Modak, S, Molloy, J, Murakami, YS, Nayak, O, Perera, D, Pina, K, Punjabi, D, Rikhter, A, Ross, TW, Sipple, J, Soler, C, Stegman, S, Stephens, H, Sunseri, J, Tang, K, Taylor, S, Thrasher, P, Van Dyk, SD, Wang, XG, Wayland, J, Wilkins, A, Yagubyan, A, Yuk, H, Yunus, S, Zhang, KD, Zheng, WK, Zheng, WK, Stahl, BE, De Jaeger, T, Filippenko, AV, Wang, SQ, Gan, WP, Brink, TG, Altunin, I, Baer-Way, R, Bigley, A, Blanchard, K, Blanchard, PK, Bradley, J, Cargill, SK, Casper, C, Chapman, T, Chander, V, Channa, S, Choi, BY, Choksi, N, Chu, M, Clubb, KI, Cohen, DP, Dalba, PA, Degraw, A, De Kouchkovsky, M, Ellison, M, Falcon, E, Fox, OD, Fuller, K, Ganeshalingam, M, Girish, N, Gould, C, Halevi, G, Halle, A, Hayakawa, KT, Hardy, R, Hestenes, J, Hoffman, AM, Hyland, M, Jeffers, BT, Jennings, C, Kandrashoff, MT, Khodanian, A, Kim, M, Kim, H, Kislak, ME, Krishnan, D, Kumar, S, Kumar, SG, Leja, J, Leonard, EJ, Li, GZ, Li, W, Lian, JS, Liu, E, Lowe, TB, Lu, P, Ma, E, Mason, MN, May, M, McAllister, K, McGinness, E, Modak, S, Molloy, J, Murakami, YS, Nayak, O, Perera, D, Pina, K, Punjabi, D, Rikhter, A, Ross, TW, Sipple, J, Soler, C, Stegman, S, Stephens, H, Sunseri, J, Tang, K, Taylor, S, Thrasher, P, Van Dyk, SD, Wang, XG, Wayland, J, Wilkins, A, Yagubyan, A, Yuk, H, Yunus, S, and Zhang, KD
Abstract: We present BVRI and unfiltered (Clear) light curves of 70 stripped-envelope supernovae (SESNe), observed between 2003 and 2020, from the Lick Observatory Supernova Search follow-up program. Our SESN sample consists of 19 spectroscopically normal SNe Ib, 2 peculiar SNe Ib, six SNe Ibn, 14 normal SNe Ic, 1 peculiar SN Ic, 10 SNe Ic-BL, 15 SNe IIb, 1 ambiguous SN IIb/Ib/c, and 2 superluminous SNe. Our follow-up photometry has (on a per-SN basis) a mean coverage of 81 photometric points (median of 58 points) and a mean cadence of 3.6 d (median of 1.2 d). From our full sample, a subset of 38 SNe have pre-maximum coverage in at least one passband, allowing for the peak brightness of each SN in this subset to be quantitatively determined. We describe our data collection and processing techniques, with emphasis toward our automated photometry pipeline, from which we derive publicly available data products to enable and encourage further study by the community. Using these data products, we derive host-galaxy extinction values through the empirical colour evolution relationship and, for the first time, produce accurate rise-time measurements for a large sample of SESNe in both optical and infrared passbands. By modelling multiband light curves, we find that SNe Ic tend to have lower ejecta masses and lower ejecta velocities than SNe Ib and IIb, but higher 56Ni masses.
Published: 2022

2. 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

3. 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

4. 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

5. 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

6. Exploring plant and lichen-associated microbial diversity for discovery of small-molecule bioactive agents

Author: Gunatilaka, AAL, primary, Kithsiri Wijeratne, EM, additional, Xu, YM, additional, Bashyal, BP, additional, Luo, J, additional, Mafezoli, J, additional, Oliveira, MCF, additional, Hoffman, AM, additional, Espinosa-Artiles, P, additional, Liu, MX, additional, Franzblau, SG, additional, and Whitesell, L, additional
Published: 2015
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7. 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

8. 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

9. 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

10. 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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11. System size dependence of associated yields in hadron-triggered jets STAR Collaboration

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, BAUMGART, S, BEAVIS, DR, BELLWIED, R, BENEDOSSO, F, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BIRITZ, B, BLAND, LC, BOMBARA, M, BONNER, BE, BOTJE, M, BOUCHET, J, BRAIDOT, E, BRANDIN, AV, BRUNA, E, BUELTMANN, S, BURTON, TP, BYSTERSKY, M, 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, CLARKE, RF, CODRINGTON, MJM, CORLISS, R, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE SILVA, LC, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNLOP, JC, MAZUMDAR, MRD, EDWARDS, WR, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, EMELIANOV, V, ENGELAGE, I, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GAILLARD, L, 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, GUIMARAES, KSFF, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HEPPELMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, 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, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOPYTINE, M, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KRUS, M, KUHN, C, 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, N, LI, C, LI, Y, LIN, G, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, MA, GL, MA, YG, MAHAPATRAM, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MATIS, HS, MATULENKO, YA, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITCHELL, J, MOHANTY, 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, PLANINIC, M, PLUTA, J, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUJAHARI, PR, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHI, XH, SICHTERMANN, ER, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STASZAK, D, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAR, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRATTNER, AL, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN LEEUWEN, M, MOLEN, AMV, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILEVSKI, IM, VASILIEV, AN, VIDEBAEK, F, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WAGGONER, WT, WALKER, M, WANG, F, WANG, G, WANG, JS, WANG, Q, WANG, X, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, Y, XIE, W, XU, N, XU, QH, XU, Y, XU, Z, YANG, Y, YEPES, P, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, ZOULKARNEEVA, Y, and ZUO, JX
Subjects: Suppression, Parton Energy Loss, Relativistic Heavy-Ion Collisions, Jet Quenching, Di-Hadron Fragmentation Function, Radiative Energy-Loss, Collisions
Abstract: We present results on the system size dependence of high transverse momentum di-hadron correlations at root s(NN) = 200 GeV as measured by STAR at RHIC. Measurements in d + Au, Cu + Cu and Au + Au collisions reveal similar jet-like near-side correlation yields (correlations at small angular separation Delta phi similar to 0, Delta eta similar to 0) for all systems and centralities. Previous measurements have shown Chat the away-side (Delta phi similar to pi) yield is suppressed in heavy-ion collisions. We present measurements of the away-side Suppression as a function of transverse momentum and centrality in Cu + Cu and Au + Au collisions. The suppression is found to be similar in Cu + Cu and An + An collisions at a similar number of participants. The results are compared to theoretical calculations based on the patron quenching model and the modified fragmentation model. The observed differences between data and theory indicate that the correlated yields presented here will further constrain dynamic energy loss models and provide information about the dynamic density profile in heavy-ion collisions. (C) 2009
Published: 2010
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12. Measurement of D* mesons in jets from p plus p collisions at root s=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, BAUMGART, S, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUIMARAES, KSFF, GUPTA, A, BEAVIS, DR, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HEPPELMANN, S, HIPPOLYTE, B, BELLWIED, R, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, HUANG, HZ, HUMANIC, TJ, IGO, G, IORDANOVA, A, BENEDOSSO, F, JACOBS, P, JACOBS, WW, JAKL, P, JENA, C, JIN, F, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, BETANCOURT, MJ, KAJIMOTO, K, KANG, K, KAPITAN, J, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIKOLA, DP, KIRYLUK, J, KISIEL, A, BETTS, RR, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOPYTINE, M, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRAVTSOV, VI, BHASIN, A, KRUEGER, K, KRUS, M, KUHN, C, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, BHATI, AK, LEDNICKY, R, LEE, CH, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, N, LI, C, LI, Y, LIN, G, LINDENBAUM, SJ, BICHSEL, H, LISA, MA, LIU, F, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, BIELCIK, J, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MATIS, HS, BIELCIKOVA, J, MATULENKO, YA, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITCHELL, J, MOHANTY, B, MOROZOV, DA, BIRITZ, B, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NG, MJ, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, BLAND, LC, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, BOMBARA, M, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PLANINIC, M, PLUTA, J, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, BONNER, BE, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RIDIGER, A, BOTJE, M, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKREJDA, I, BOUCHET, J, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, BRAIDOT, E, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHI, XH, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, BRANDIN, AV, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STASZAK, D, STRIKHANOV, M, BRUNA, E, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, BUELTMANN, S, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, BURTON, TP, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRATTNER, AL, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, BYSTERSKY, M, UNDERWOOD, DG, VAN BUREN, G, VAN LEEUWEN, M, MOLEN, AMV, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILEVSKI, IM, VASILIEV, AN, VIDEBAEK, F, CAI, XZ, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WAGGONER, WT, WALKER, M, WANG, F, WANG, G, WANG, JS, CAINES, H, WANG, Q, WANG, X, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, SANCHEZ, MCD, WITT, R, WU, Y, XIE, W, XU, N, XU, QH, XU, Y, XU, Z, YANG, Y, YEPES, P, YOO, IK, CATU, O, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, Y, CEBRA, D, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, ZOULKARNEEVA, Y, ZUO, JX, 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, CLARKE, RF, CODRINGTON, MJM, CORLISS, R, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE SILVA, LC, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNLOP, JC, MAZUMDAR, MRD, EDWARDS, WR, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GAILLARD, L, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, EJ, GEROMITSOS, A, and GEURTS, F
Subjects: Z Decays, Physics, Heavy-Quark Production
Abstract: We report the measurement of charged D* mesons in inclusive jets produced in proton-proton collisions at a center-of-mass energy root s = 200 GeV with the STAR experiment at the Relativistic Heavy Ion Collider. 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(jet) = 0.015 +/- 0.008(stat) +/- 0.007(sys). This rate is consistent with perturbative QCD evaluation of gluon splitting into a pair of charm quarks and subsequent hadronization.
Published: 2009

13. Growth of Long Range Forward-Backward Multiplicity Correlations with Centrality in Au plus Au Collisions at root s(NN)=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, BAUMGART, S, BEAVIS, DR, BELLWIED, R, BENEDOSSO, F, BETANCOURT, MJ, BETTS, RR, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BIRITZ, B, BLAND, LC, BOMBARA, M, BONNER, BE, BOTJE, M, BOUCHET, J, BRAIDOT, E, BRANDIN, AV, BRUNA, E, BUELTMANN, S, BURTON, TP, BYSTERSKY, M, 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, CLARKE, RF, CODRINGTON, MJM, CORLISS, R, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE SILVA, LC, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNLOP, JC, MAZUMDAR, MRD, EDWARDS, WR, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GAILLARD, L, 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, GUIMARAES, KSFF, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HEPPELMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, 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, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOPYTINE, M, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KRUS, M, KUHN, C, 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, N, LI, C, LI, Y, LIN, G, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MATIS, HS, MATULENKO, YA, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITCHELL, J, MOHANTY, 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, PLANINIC, M, PLUTA, J, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUJAHARI, PR, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, REDWINE, R, REED, R, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHI, XH, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STASZAK, D, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, TLUSTY, D, TOKAREV, M, TRAM, VN, TRATTNER, AL, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN LEEUWEN, M, MOLEN, AMV, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILEVSKI, IM, VASILIEV, AN, VIDEBAEK, F, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WALKER, M, WANG, F, WANG, G, WANG, JS, WANG, Q, WANG, X, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, Y, XIE, W, XU, N, XU, QH, XU, Y, XU, Z, YANG, Y, YEPES, P, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, ZOULKARNEEVA, Y, and ZUO, JX
Subjects: Gluon Distribution-Functions, Quark, Monte-Carlo Model, Rapidity Correlations, Strings, Large Nuclei, Sps, Fusion, Energies
Abstract: Forward-backward multiplicity correlation strengths have been measured with the STAR detector for Au + Au and p + p collisions at root s(NN) = 200 GeV. Strong short- and long-range correlations (LRC) are seen in central Au + Au collisions. The magnitude of these correlations decrease with decreasing centrality until only short-range correlations are observed in peripheral Au + Au collisions. Both the dual parton model (DPM) and the color glass condensate (CGC) predict the existence of the long-range correlations. In the DPM, the fluctuation in the number of elementary (parton) inelastic collisions produces the LRC. In the CGC, longitudinal color flux tubes generate the LRC. The data are in qualitative agreement with the predictions of the DPM and indicate the presence of multiple parton interactions.
Published: 2009
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14. Energy and system size dependence of phi meson production in Cu plus Cu and Au plus Au collisions

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNSBY, LS, BAUDOT, J, BAUMGART, S, BEAVIS, DR, BELLWIED, R, BENEDOSSO, F, BETANCOURT, MJ, BETTS, RR, BHARADWAJ, S, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BIRITZ, B, BLAND, LC, BOMBARA, M, BONNER, BE, BOTJE, M, BOUCHET, J, BRAIDOT, E, BRANDIN, AV, BRUNA, E, BUELTMANN, S, BURTON, TP, BYSTERSKY, M, CAI, XZ, CAINES, H, SANCHEZ, MCD, CALLNER, J, 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, SU, CLARKE, RF, CODRINGTON, MJ, COFFIN, JP, CORLISS, R, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE SILVA, C, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNLOP, JC, MAZUMDAR, MRD, EDWARDS, WR, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GAILLARD, L, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, E, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUIMARAES, KSFF, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HEPPLEMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, HUANG, HZ, HUMANIC, TJ, IGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKI, P, JIN, F, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIKOLA, DP, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOPYTINE, M, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KRUS, M, KUHN, C, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEIGHT, W, LEVINE, MJ, LI, C, LI, Y, LIN, G, LIN, X, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MATIS, HS, MATULENKO, YA, MCSHANE, TS, MESCHANIN, A, MILLNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITCHELL, J, MOHANTY, B, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NEPALI, C, 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, PLANINIC, M, PLUTA, J, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, RYKOV, V, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SAVIN, I, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, R, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHI, XH, SICHTERMANN, E, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STASZAK, D, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRATTNER, AL, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN LEEUWEN, M, MOLEN, AMV, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILEVSKI, IM, VASILIEV, AN, VIDEBAEK, F, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WAGGONER, WT, WALKER, M, WANG, F, WANG, G, WANG, JS, WANG, Q, WANG, X, WANG, XL, WANG, Y, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, Y, XU, N, XU, QH, XU, Y, XU, Z, YEPES, P, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, H, ZHANG, S, ZHANG, WM, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, ZOULKARNEEVA, Y, and ZUO, JX
Subjects: Nucleus Collisions, Particle Production, Canonical Suppression, Proton-Proton Collisions, Resonances, Strangeness Enhancement, Quark-Gluon Plasma, Heavy-Ion Collisions, Conservation, Rule, Collaboration, Pp Collisions, Model
Abstract: We study the beam-energy and system-size dependence of phi meson production (using the hadronic decay mode phi -> K(+) K(-)) by comparing the new results from Cu + Cu collisions and previously reported Au + Au collisions at root s(NN) = 62.4 and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity (vertical bar y vertical bar < 0.5) for 0.4 < p(T) < 5 GeV/c. At a given beam energy, the transverse momentum distributions for phi mesons are observed to be similar in yield and shape for Cu + Cu and Au + Au colliding systems with similar average numbers of participating nucleons. The phi meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from p + p collisions. The enhancement for phi mesons lies between strange hadrons having net strangeness = 1 (K(-) and ) and net strangeness = 2 (Xi). The enhancement for phi mesons is observed to be higher at root s(NN) = 200 GeV compared to 62.4 GeV. These observations for the produced phi(s (s) over bar) mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems. (C) 2009
Published: 2009

15. 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

16. Neutral pion production in Au 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, BAUDOT, J, GORBUNOV, YN, GORDON, A, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUIMARAES, KSFF, GUPTA, A, GUPTA, N, GURYN, W, BAUMGART, S, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HEPPELMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, BEAVIS, DR, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, HUANG, HZ, HUMANIC, TJ, HUO, L, IGO, G, IORDANOVA, A, JACOBS, P, BELLWIED, R, JACOBS, WW, JAKL, P, JENA, C, JIN, F, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KAJIMOTO, K, BENEDOSSO, F, KANG, K, KAPITAN, J, KAUDER, K, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIKOLA, DP, KIRYLUK, J, KISIEL, A, BETANCOURT, MJ, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KONZER, J, KOPYTINE, M, KORALT, I, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, BETTS, RR, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KRUS, M, KUHN, C, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, BHASIN, A, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, N, LI, Y, BHATI, AK, LIN, G, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, BICHSEL, H, LOVE, WA, LU, Y, LUDLAM, T, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, BIELCIK, J, MARGETIS, S, MARKERT, C, MASUI, H, MATIS, HS, MATULENKO, YA, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, BIELCIKOVA, J, MIODUSZEWSKI, S, MISCHKE, A, MOHANTY, B, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, BIRITZ, B, NG, MJ, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, PAGE, BS, BLAND, LC, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PILE, P, BNZAROV, I, PLANINIC, M, PLOSKON, MA, PLUTA, J, PLYKU, D, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, BOMBARA, M, PUJAHARI, PR, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, REDWINE, R, REED, R, RIDIGER, A, RITTER, HG, ROBERTS, JB, BONNER, BE, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKAI, S, SAKREJDA, I, SAKUMA, T, BOUCHET, J, SALUR, S, SANDWEISS, J, SARSOUR, M, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, BRAIDOT, E, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHI, XH, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, BRANDIN, AV, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STANISLAUS, TDS, STASZAK, D, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, BRUNA, E, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, BUELTMANN, S, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, TLUSTY, D, TOKAREV, M, BURTON, TP, TRAINOR, TA, TRAM, VN, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN NIEUWENHUIZEN, G, BYSTERSKY, M, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILIEV, AN, VIDEBAEK, F, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, CAI, XZ, WALKER, M, WANG, F, WANG, G, WANG, H, WANG, JS, WANG, Q, WANG, X, WANG, XL, WANG, Y, WEBB, G, CAINES, H, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, Y, XIE, W, XU, N, XU, QH, SANCHEZ, MCB, XU, Y, XU, Z, YANG, Y, YEPES, P, YIP, K, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, CATU, O, ZHANG, S, ZHANG, WM, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZHU, X, ZOULKARNEEV, R, CEBRA, D, ZOULKARNEEVA, Y, ZUO, JX, 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, CLARKE, RF, CODRINGTON, MJM, CORLISS, R, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE SILVA, LC, 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, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GAILLARD, L, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, EJ, GEROMITSOS, A, GEURTS, F, GHAZIKHANIAN, V, and GHOSH, P
Subjects: D+Au Collisions, Suppression, Nucleus-Nucleus Collisions, Energy-Loss, P+P, Transverse-Momentum Distributions, Collaboration
Abstract: The results of midrapidity (0 < y < 0.8) neutral pion spectra over an extended transverse momentum range (1 < p(T) < 12 GeV/c) in root s(NN) = 200 GeV Au + Au collisions, measured by the STAR experiment, are presented. The neutral pions are reconstructed from photons measured either by the STAR Barrel Electro-Magnetic Calorimeter or by the Time Projection Chamber via tracking of conversion electron-positron pairs. Our measurements are compared to previously published pi(+/-) and pi(0) results. The nuclear modification factors R(CP) and R(AA) of pi(0) are also presented as a function of p(T). In the most central Au + Au collisions, the binary collision scaled pi(0) yield at high p(T) is suppressed by a factor of about 5 compared to the expectation from the yield of p + p collisions. Such a large suppression is in agreement with previous observations for light quark mesons and is consistent with the scenario that partons suffer considerable energy loss in the dense medium formed in central nucleus-nucleus collisions at the Relativistic Heavy Ion Collider.
Published: 2009

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

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, BAUMGART, S, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUIMARAES, KSFF, GUPTA, A, GUPTA, N, BEAVIS, DR, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HEPPELMANN, S, HIPPOLYTE, B, HIRSCH, A, BELLWIED, R, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, HUANG, HZ, HUMANIC, TJ, HUO, L, IGO, G, IORDANOVA, A, BENEDOSSO, F, JACOBS, P, JACOBS, WW, JAKL, P, JENA, C, JIN, F, JONES, CL, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, BETANCOURT, MJ, KAJIMOTO, K, KANG, K, KAPITAN, J, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIKOLA, DP, KIRYLUK, J, KISIEL, A, BETTS, RR, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOPYTINE, M, KORSCH, W, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRAVTSOV, VI, BHASIN, A, KRUEGER, K, KRUS, M, KUHN, C, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, BHATI, AK, LEDNICKY, R, LEE, CH, LEE, JH, LEIGHT, W, LEVINE, MJ, LI, C, LI, N, LI, Y, LIN, G, LINDENBAUM, SJ, BICHSEL, H, LISA, MA, LIU, F, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, BIELCIK, J, MA, GL, MA, YG, MAHAPATRA, DP, MAJKA, R, MALL, OI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MATIS, HS, BIELCIKOVA, J, MATULENKO, YA, MCDONALD, D, MCSHANE, TS, MESCHANIN, A, MILNER, R, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MOHANTY, B, MOROZOV, DA, BIRITZ, B, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NG, MJ, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, BLAND, LC, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, BOMBARA, M, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PILE, P, PLANINIC, M, PLUTA, J, PLYKU, D, POLJAK, N, BONNER, BE, POSKANZER, AM, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUJAHARI, PR, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, BOTJE, M, REDWINE, R, REED, R, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, BOUCHET, J, RUSSCHER, MJ, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, BRAIDOT, E, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHI, XH, SICHTERMANN, EP, BRANDIN, AV, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, BRUNA, E, STANISLAUS, TDS, STASZAK, D, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, BUELTMANN, S, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARINI, LH, TARNOWSKY, T, THEIN, D, BURTON, TP, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, TLUSTY, D, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRATTNER, AL, TRENTALANGE, S, BYSTERSKY, M, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN LEEUWEN, M, MOLEN, AMV, VANFOSSEN, JA, VARMA, R, CAI, XZ, VASCONCELOS, GMS, VASILEVSKI, IM, VASILIEV, AN, VIDEBAEK, F, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WALKER, M, CAINES, H, WANG, F, WANG, G, WANG, JS, WANG, Q, WANG, X, WANG, XL, WANG, Y, WEBB, G, WEBB, JC, WESTFALL, GD, SANCHEZ, MCD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, Y, XIE, W, XU, N, XU, QH, XU, Y, XU, Z, CATU, O, YANG, Y, YEPES, P, YIP, K, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, S, ZHANG, WM, CEBRA, D, ZHANG, XP, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, ZOULKARNEEVA, Y, ZUO, JX, 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, CLARKE, RF, CODRINGTON, MJM, CORLISS, R, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE SILVA, LC, 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, EDWARDS, WR, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GAILLARD, L, GANGADHARAN, DR, GANTI, MS, GARCIA-SOLIS, EJ, GEROMITSOS, A, GEURTS, F, and GHAZIKHANIAN, V
Subjects: Nucleus Collisions, Intersecting Storage-Rings, P(P)Over-Bar Collisions, D+Au Collisions, Suppression, Au Collisions, Quark-Gluon Plasma, Heavy-Ion Collisions, J-Psi, Root S=1.8 Tev
Abstract: The STAR Collaboration at the Relativistic Heavy Ion Collider presents measurements of J/psi e(+) e(-) at midrapidity and high transverse momentum (pT > 5 GeV/c) in p + p and central Cu + Cu collisions at root s(NN) = 200 GeV. The inclusive J/psi production cross section for Cu + Cu collisions is found to be consistent at high p(T) with the binary collision-scaled cross section for p + p collisions. At a confidence level of 97%, this is in contrast to a suppression of J/psi production observed at lower p(T). Azimuthal correlations of J/psi with charged hadrons in p + p collisions provide an estimate of the contribution of B-hadron decays to J/psi production of 13% +/- 5%.
Published: 2009

18. Spin alignment measurements of the K*(0)(892) and phi(1020) vector mesons in heavy ion collisions at root S-NN=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, GARCIA-SOLIS, E, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUIMARAES, KSFF, BAUMGART, S, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HEPPELMANN, S, BEAVIS, DR, HIPPOLYTE, B, HIRSCH, A, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, HUANG, HZ, HUGHES, EW, HUMANIC, TJ, IGO, G, BELLWIED, R, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKL, P, JIN, F, JONES, PG, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, BENEDOSSO, F, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, BETTS, RR, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, BHARDWAJ, S, KUMAR, A, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LANGE, S, LAPOINTE, S, LAUE, F, LAURET, J, LEBEDEV, A, BHASIN, A, LEDNICKY, R, LEE, CH, LEVINE, MJ, LI, C, LI, Y, LIN, G, LIN, X, LINDENBAUM, SJ, LISA, MA, LIU, F, BHATI, AK, LIU, H, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, BICHSEL, H, MA, GL, MA, JG, MA, YG, MAHAPATRA, DP, MAJKA, R, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MATIS, HS, BIELCIK, J, MATULENKO, YA, MCSHANE, TS, MESCHANIN, A, MILLANE, J, MILLER, ML, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITCHELL, J, MOHANTY, B, BIELCIKOVA, J, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NEPALI, C, NETRAKANTI, PK, NG, MJ, NOGACH, LV, BIRITZ, B, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, PAL, SK, PANEBRATSEV, Y, PAWLAK, T, BLAND, LC, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PLANINIC, M, PLUTA, J, POLJAK, N, PORILE, N, POSKANZER, AM, BOMBARA, M, POTEKHIN, M, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUTSCHKE, J, QATTAN, IA, RANIWALA, R, RANIWALA, S, RAY, RL, BONNER, BE, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, RYKOV, V, BOTJE, M, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, BOUCHET, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHI, XH, SICHTERMANN, EP, SIMON, F, BRAIDOT, E, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, BRANDIN, AV, STASZAK, D, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Z, BUELTMANN, S, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, BURTON, TP, TIMMINS, AR, TIMOSHENKO, S, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRATTNER, AL, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, BYSTERSKY, M, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN DER KOLK, N, VAN LEEUWEN, M, MOLEN, AMV, VARMA, R, VASCONCELOS, GMS, VASILEVSKI, IM, VASILIEV, AN, CAI, XZ, VIDEBAEK, F, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WAGGONER, WT, WANG, F, WANG, G, WANG, JS, CAINES, H, WANG, Q, WANG, X, WANG, XL, WANG, Y, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, SANCHEZ, MCD, WU, J, WU, Y, XU, N, XU, QH, XU, Z, YEPES, P, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, CALLNER, J, ZHAN, W, ZHANG, H, ZHANG, S, ZHANG, WM, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, CATU, O, ZOULKARNEEVA, Y, ZUO, JX, 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, SU, CLARKE, RF, CODRINGTON, MJM, COFFIN, JP, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE MOURA, MM, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DIETEL, T, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNLOP, JC, MAZUMDAR, MRD, EDWARDS, WR, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GAILLARD, L, GANGADHARAN, DR, and GANTI, MS
Subjects: Physics, Nuclear, Z(0) Decays, Quark-Gluon Plasma, Hyperon Polarization, Magnetic-Moment, High Energy Physics::Experiment, K&P Interactions, Protons, Hadron-Production, Signature, Pp, Nuclear Experiment, High-Energies
Abstract: We present the first spin alignment measurements for the K*(0)(892) and phi(1020) vector mesons produced at midrapidity with transverse momenta up to 5 GeV/c at root s(NN) = 200 GeV at RHIC. The diagonal spin-density matrix elements with respect to the reaction plane in Au+Au collisions are rho(00) = 0.32 +/- 0.04 (stat) +/- 0.09 (syst) for the K*(0) (0.8 < p(T) < 5.0 GeV/c) and rho(00) = 0.34 +/- 0.02 (stat) +/- 0.03 (syst) for the phi (0.4 < p(T) < 5.0 GeV/c) and are constant with transverse momentum and collision centrality. The data are consistent with the unpolarized expectation of 1/3 and thus no evidence is found for the transfer of the orbital angular momentum of the colliding system to the vector-meson spins. Spin alignments for K-*0 and phi in Au+Au collisions were also measured with respect to the particle's production plane. The phi result, rho(00) = 0.41 +/- 0.02 (stat) +/- 0.04 (syst), is consistent with that in p+p collisions, rho(00) = 0.39 +/- 0.03 (stat) +/- 0.06 (syst), also measured in this work. The measurements thus constrain the possible size of polarization phenomena in the production dynamics of vector mesons.
Published: 2008

19. Hadronic resonance production in d+Au collisions at root S(NN) = 200 GeV measured at the BNL Relativistic Heavy Ion Collider

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, GARCIA-SOLIS, ES, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GORDON, A, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUIMARAES, KSFF, BAUMGART, S, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HEPPLEMANN, S, BEAVIS, DR, HIPPOLYTE, B, HIRSCH, A, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, HUANG, HZ, HUMANIC, TJ, IGO, G, IORDANOVA, A, BELLWIED, R, JACOBS, P, JACOBS, WW, JAKL, P, JIN, F, JONES, PG, JOSEPH, J, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, BENEDOSSO, F, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, BETTS, RR, KOCOLOSKI, A, KOETKE, DD, KOPYTINE, M, KOTCHENDA, L, KOUCHPIL, V, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KRUS, M, KUHN, C, BHARDWAJ, S, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LAPOINTE, S, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEVINE, MJ, BHASIN, A, LI, C, LI, Y, LIN, G, LIN, X, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, BHATI, AK, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, MA, YG, MAHAPATRA, DP, BICHSEL, H, MAJKA, R, MALL, MI, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MATIS, HS, MATULENKO, YA, MCSHANE, TS, MESCHANIN, A, BIELCIK, J, MILLANE, J, MILLER, ML, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MISHRA, DK, MITCHELL, J, MOHANTY, B, MOROZOV, DA, MUNHOZ, MG, BIELCIKOVA, J, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NEPALI, C, NETRAKANTI, PK, NG, MJ, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, BIRITZ, B, OGAWA, A, OKADA, H, OKOROKOV, V, OLSON, D, PACHR, M, PAGE, BS, PAL, SK, PANDIT, Y, PANEBRATSEV, Y, PAWLAK, T, BLAND, LC, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PLANINIC, M, PLUTA, J, POLJAK, N, POSKANZER, AM, POTUKUCHI, BVKS, BOMBARA, M, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUTSCHKE, J, RANIWALA, R, RANIWALA, S, RAY, RL, REED, R, RIDIGER, A, RITTER, HG, BONNER, BE, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, RYKOV, V, SAHOO, R, SAKREJDA, I, BOTJE, M, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, BOUCHET, J, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHI, XH, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, BRAIDOT, E, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STASZAK, D, STRIKHANOV, M, BRANDIN, AV, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Y, SUN, Z, SURROW, B, SYMONS, TJM, BRUNA, DETOLEDO, AS, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, BUELTMANN, S, TLUSTY, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRATTNER, AL, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, BURTON, TP, UNDERWOOD, DG, VAN BUREN, G, VAN LEEUWEN, M, MOLEN, AMV, VANFOSSEN, JA, VARMA, R, VASCONCELOS, GMS, VASILEVSKI, IM, VASILIEV, AN, VIDEBAEK, F, BYSTERSKY, M, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WAGGONER, WT, WANG, F, WANG, G, WANG, JS, WANG, Q, CAI, XZ, WANG, X, WANG, XL, WANG, Y, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, Y, CAINES, H, XU, N, XU, QH, XU, Y, XU, Z, YEPES, P, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, SANCHEZ, MCD, ZHANG, H, ZHANG, S, ZHANG, WM, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, ZOULKARNEEVA, Y, CALLNER, J, ZUO, JX, CATU, O, CEBRA, D, CENDEJAS, R, CERVANTES, MC, CHAJECKI, Z, CHALOUPKA, P, CHATTOPDHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, KE, CHRISTIE, W, CHUNG, SU, CLARKE, RF, CODRINGTON, MJM, COFFIN, JP, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE SILVA, C, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNLOP, JC, MAZUMDAR, MRD, EDWARDS, WR, EFIMOV, LG, ELHALHULI, E, ELNIMR, M, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GAILLARD, L, GANGAHARAN, DR, and GANTI, MS
Subjects: Gluon Production, Particle-Production, Large Transverse-Momentum, Au+Au Collisions, Time Projection Chamber, Inclusive Production, Meson Production, Freeze-Out, Colored Glass, Energy Nuclear Collisions
Abstract: We present the first measurements of the rho(770)(0),K(*)(892),Delta(1232)(++),Sigma(1385), and Lambda(1520) resonances in d+Au collisions at s(NN)=200 GeV, reconstructed via their hadronic decay channels using the STAR detector (the solenoidal tracker at the BNL Relativistic Heavy Ion Collider). The masses and widths of these resonances are studied as a function of transverse momentum p(T). We observe that the resonance spectra follow a generalized scaling law with the transverse mass m(T). The < p(T)> of resonances in minimum bias collisions are compared with the < p(T)> of pi,K, and p. The rho(0)/pi(-),K(*)/K(-),Delta(++)/p,Sigma(1385)/Lambda, and Lambda(1520)/Lambda ratios in d+Au collisions are compared with the measurements in minimum bias p+p interactions, where we observe that both measurements are comparable. The nuclear modification factors (R(dAu)) of the rho(0),K(*), and Sigma(*) scale with the number of binary collisions (N(bin)) for p(T)> 1.2 GeV/c.
Published: 2008

20. Longitudinal double-spin asymmetry for inclusive jet production in (p)over-right-arrow + (p)over-right-arrow collisions at root s=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, BAUMGART, S, BELAGA, VV, BELLINGERI-LAURIKAINEN, A, BELLWIED, R, BENEDOSSO, F, BETTS, RR, BHARDWAJ, S, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BLYTH, SL, BOMBARA, M, BONNER, BE, BOTJE, M, BOUCHET, J, BRANDIN, AV, BURTON, TP, BYSTERSKY, M, CAI, XZ, CAINES, H, SANCHEZ, MCDLB, CALLNER, J, CATU, O, CEBRA, D, CERVANTES, MC, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, SU, CLARKE, RF, CODRINGTON, MJM, COFFIN, JP, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE MOURA, MM, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DIDENKO, L, DIETEL, T, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNIN, VB, DUNLOP, JC, MAZUMDAR, MRD, EDWARDS, WR, EFIMOV, LG, ELHALHULI, E, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, FU, J, GAGLIARDI, CA, GAILLARD, L, GANTI, MS, GARCIA-SOLIS, E, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YN, GOS, H, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUIMARAES, KSFF, GUPTA, A, GUPTA, N, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HENRY, TW, HEPPELMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, HORNER, MJ, HUANG, HZ, HUGHES, EW, HUMANIC, TJ, IGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKL, P, JONES, PG, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIRYLUK, J, KISIEL, A, KISLOV, EM, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, KOTCHENDA, L, KOUCHPIL, V, KOWALIK, KL, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, KULIKOV, AI, KUMAR, A, KURNADI, P, KUZNETSOV, AA, LAMONT, MAC, LANDGRAF, JM, LANGE, S, LAPOINTE, S, LAUE, F, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEHOCKA, S, LEVINE, MJ, LI, C, LI, Q, LI, Y, LIN, G, LIN, X, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, MA, JG, MA, YG, MAHAPATRA, DP, MAJKA, R, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MARTIN, L, MATIS, HS, MATULENKO, YA, MCSHANE, TS, MESCHANIN, A, MILLANE, J, MILLER, ML, MINAEV, NG, MIODUSZEWSKI, S, MISCHKE, A, MITCHELL, J, MOHANTY, B, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NEPALI, C, NETRAKANTI, PK, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKOROKOV, V, OLSON, D, PACHR, M, PAL, SK, PANEBRATSEV, Y, PAVLINOV, AI, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PLANINIC, M, PLUTA, J, POLJAK, N, PORILE, N, POSKANZER, AM, POTEKHIN, M, POTREBENIKOVA, E, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, PUTSCHKE, J, QATTAN, IA, RANIWALA, R, RANIWALA, S, RAY, RL, RELYEA, D, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SAZHIN, PS, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHEN, WQ, SHIMANSKIY, SS, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPELTZ, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STASZAK, D, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TIMOSHENKO, S, TOKAREV, M, TRAINOR, TA, TRAM, VN, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN DER KOLK, N, VAN LEEUWEN, M, MOLEN, AMV, VARMA, R, VASILEVSKI, IM, VASILIEV, AN, VERNET, R, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WADA, M, WAGGONER, WT, WANG, F, WANG, G, WANG, JS, WANG, XL, WANG, Y, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, J, WU, Y, XU, N, XU, QH, XU, Z, YEPES, P, YOO, IK, YUE, Q, YUREVICH, VI, ZAWISZA, M, ZHAN, W, ZHANG, H, ZHANG, WM, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, ZOULKARNEEVA, Y, ZUBAREV, AN, and ZUO, JX
Subjects: Photoproduction, Pair, Nuclear Theory, Physics, Multidisciplinary, High Energy Physics::Experiment, Polarized Protons, Nuclear Experiment, Nucleon
Abstract: We report a new STAR measurement of the longitudinal double-spin asymmetry A(LL) for inclusive jet production at midrapidity in polarized p+p collisions at a center-of-mass energy of root s = 200 GeV. The data, which cover jet transverse momenta 5 < p(T) < 30 GeV/c, are substantially more precise than previous measurements. They provide significant new constraints on the gluon spin contribution to the nucleon spin through the comparison to predictions derived from one global fit to polarized deep-inelastic scattering measurements. They provide significant new constraints on the gluon spin contribution to the nucleon spin through the comparison to predictions derived from one global fit to polarized deep-inelastic scattering measurements.
Published: 2008

21. Centrality dependence of charged hadron and strange hadron elliptic flow from root s(NN)=200 GeVAu+Au collisions

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, GREBENYUK, O, GROSNICK, D, GRUBE, B, GUERTIN, SM, GUPTA, A, GUPTA, N, GURYN, W, HAAG, B, HALLMAN, TJ, HAMED, A, BAUMGART, S, HARRIS, JW, HE, W, HEINZ, M, HEPPELMANN, S, HIPPOLYTE, B, HIRSCH, A, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, DJ, HOLLIS, RS, BEAVIS, DR, HUANG, HZ, HUGHES, EW, HUMANIC, TJ, LGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKL, P, JIN, F, JONES, PG, BELLWIED, R, JUDD, EG, KABANA, S, KAJIMOTO, K, KANG, K, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, BENEDOSSO, F, KIRYLUK, J, KISIEL, A, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, KOTCHENDA, L, KOUCHPIL, V, BETTS, RR, KRAVTSOV, P, KRAVTSOV, V, KRUEGER, K, KUHN, C, KUMAR, A, KUMAR, L, KURNADI, P, LAMONT, MAC, LANDGRAF, JM, LANGE, S, BHARDWAJ, S, LAPOINTE, S, LAUE, F, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEVINE, MJ, LI, C, LI, Y, LIN, G, BHASIN, A, LIN, X, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, BHATI, AK, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, MA, JG, MA, YG, MAHAPATRA, DP, MAJKA, R, MANGOTRA, LK, BICHSEL, H, MANWEILER, R, MARGETIS, S, MARKERT, C, MATIS, HS, MATULENKO, YA, MCSHANE, TS, MESCHANIN, A, MILLANE, J, MILLER, ML, MINAEV, NG, BIELCIK, J, MIODUSZEWSKI, S, MISCHKE, A, MITCHELL, J, MOHANTY, B, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, BIELCIKOVA, J, NEPALI, C, NETRAKANTI, PK, NG, MJ, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKADA, H, OKOROKOV, V, OLDENBURG, M, BLAND, LC, OLSON, D, PACHR, M, PAL, SK, PANEBRATSEV, Y, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, BOMBARA, M, PLANINIC, M, PLUTA, J, POLJAK, N, PORILE, N, POSKANZER, AM, POTEKHIN, M, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PRUTHI, NK, BONNER, BE, PUTSCHKE, J, QATTAN, IA, RANIWALA, R, RANIWALA, S, RAY, RL, RELYEA, D, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, BOTJE, M, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, RYKOV, V, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, BRAIDOT, E, SANDWEISS, J, SARSOUR, M, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SCHWEDA, K, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, BRANDIN, AV, SHAHALIEV, E, SHAO, M, SHARMA, M, SHI, SS, SHI, XH, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SKOBY, MJ, SMIRNOV, N, BUELTMANN, S, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STASZAK, D, STOCK, R, STRIKHANOV, M, BURTON, TP, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, BYSTERSKY, M, TAKAHASHI, J, TANG, AH, TANG, Z, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIAN, J, TIMMINS, AR, TIMOSHENKO, S, TOKAREV, M, CAI, XZ, TRAM, VN, TRATMER, AL, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN DER KOLK, N, CAINES, H, VAN LEEUWEN, M, MOLEN, AMV, VARMA, R, VASCONCELOS, GMS, VASILEVSKI, IM, VASILIEV, AN, VIDEBAEK, F, VIGDOR, SE, VIYOGI, YP, VOKAL, S, SANCHEZ, MCD, VOLOSHIN, SA, WADA, M, WAGGONER, WT, WANG, F, WANG, G, WANG, JS, WANG, Q, WANG, X, WANG, XL, WANG, Y, CALLNER, J, WEBB, JC, WESTFALL, GD, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, J, WU, Y, XU, N, XU, QH, CATU, O, XU, Z, YEPES, P, YOO, IK, YUE, Q, ZAWISZA, M, ZBROSZCZYK, H, ZHAN, W, ZHANG, H, ZHANG, S, ZHANG, WM, CEBRA, D, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZOULKAMEEV, R, ZOULKARNEEVA, Y, ZUO, JX, 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, SU, CLARKE, RF, CODRINGTON, MJM, COFFIN, JP, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE MOURA, MM, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DE SOUZA, RD, DIDENKO, L, DIETEL, T, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNLOP, JC, MAZUMDAR, MRD, EDWARDS, WR, EFIMOV, LG, ELHALHULI, E, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, EUN, L, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, GAGLIARDI, CA, GAILLARD, L, GANTI, MS, GARCIA-SOLIS, E, GHAZIKHANIAN, V, GHOSH, R, GORBUNOV, YN, and GORDON, A
Subjects: Expansion, Energy, Nuclear Theory, Lee-Yang Zeros, Relativistic Nuclear Collisions, Collective Flow, Signature, Collaboration, Anisotropic Flow, Physics, Nuclear, Quark-Gluon Plasma, High Energy Physics::Experiment, Phase-Transition, Nuclear Experiment
Abstract: We present STAR results on the elliptic flow upsilon(2) Of charged hadrons, strange and multistrange particles from,root s(NN) = 200 GeV Au+Au collisions at the BNL Relativistic Heavy Ion Collider (RHIC). The detailed study of the centrality dependence of upsilon(2) over a broad transverse momentum range is presented. Comparisons of different analysis methods are made in order to estimate systematic uncertainties. To discuss the nonflow effect, we have performed the first analysis Of upsilon(2) with the Lee-Yang zero method for K-S(0) and A. In the relatively low PT region, P-T
Published: 2008

22. Strange particle production in p+p collisions at root s=200 GeV

Author: ABELEV, BI, ADAMS, J, AGGARWAL, MM, AHAMMED, Z, AMONETT, J, ANDERSON, BD, ANDERSON, M, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, RAKNESS, G, RANIWALA, R, RANIWALA, S, RAY, RL, RAZIN, SV, BLYTH, SL, REINNARTH, J, RELYEA, D, RETIERE, F, HARRIS, JW, LJUBICIC, T, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, BONNER, BE, RUAN, L, RUSSCHER, MJ, LLOPE, WJ, HE, W, SAHOO, R, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SAZHIN, PS, SCHAMBACH, J, SCHARENBERG, RP, BOTJE, M, LONG, H, SCHMITZ, N, BARANNIKOVA, O, SCHWEDA, K, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, LONGACRE, RS, SHEN, WQ, BOUCHET, J, HEINZ, M, SHIMANSKIY, SS, SICHTERMANN, E, SIMON, F, SINGARAJU, RN, SMIRNOV, N, SNELLINGS, R, SOOD, G, LOVE, WA, SORENSEN, P, SOWINSKI, J, SPELTZ, J, HENRY, TW, BRANDIN, AV, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STOCK, R, LU, Y, STOLPOVSKY, A, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, HEPPLEMANN, S, SUGARBAKER, E, BRAVAR, A, SUMBERA, M, SUN, Z, SURROW, B, LUDLAM, T, SWANGER, M, SYMONS, TJM, DE TOLEDO, AS, TAI, A, TAKAHASHI, J, HIPPOLYTE, B, TANG, AH, TARNOWSKY, T, BURTON, TP, THEIN, D, LYNN, D, THOMAS, JH, TIMMINS, AR, TIMOSHENKO, S, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, HIRSCH, A, TRIBBLE, RE, TSAI, OD, ULERY, J, MA, GL, BYSTERSKY, M, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN DER KOLK, N, VAN LEEUWEN, M, VANDER MOLEN, AM, HJORT, E, VARMA, R, VASILEVSKI, IM, BHARDWAJ, S, VASILIEV, AN, VERNET, R, CADMAN, RV, VIGDOR, SE, VIYOGI, VP, VOKAL, S, VOLOSHIN, SA, WAGGONER, WT, HOFFMAN, AM, WANG, F, GROSNICK, D, WANG, G, WANG, JS, WANG, XL, WANG, Y, CAI, XZ, WATSON, JW, WEBB, JC, WESTFALL, GD, WETZLER, A, HOFFMANN, GW, MA, JG, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WOOD, J, WU, J, CAINES, H, XU, N, XU, QH, XU, Z, MA, YG, HORNER, MJ, YEPES, P, YOO, IK, YUREVICH, VI, ZHAN, W, ZHANG, H, ZHANG, WM, ZHANG, Y, SANCHEZ, MCD, ZHANG, ZP, MAGESTRO, D, ZHAO, Y, HUANG, HZ, ZHONG, C, ZOULKARNEEV, R, ZOULKARNEEVA, Y, ZUBAREV, AN, ZUO, JX, CASTILLO, J, CATU, O, CEBRA, D, MAHAPATRA, DP, CHAJECKI, Z, CHALOUPKA, P, BARNBY, LS, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, MAJKA, R, COFFIN, JP, CORMIER, TM, COSENTINO, MR, HUANG, SL, CRAMER, JG, CRAWFORD, HJ, DAS, D, DAS, S, DASH, S, DAUGHERITY, M, MANGOTRA, LK, DE MOURA, MM, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, HUGHES, EW, DIDENKO, L, DIETEL, T, DJAWOTHO, P, DOGRA, SM, DONG, WJ, MANWEILER, R, DONG, X, DRAPER, JE, DU, F, DUNIN, VB, DUNLOP, JC, HUMANIC, TJ, MAZUMDAR, MRD, ECKARDT, V, EDWARDS, WR, EFIMOV, LG, MARGETIS, S, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, FACHINI, P, IGO, G, FATEMI, R, FEDORISIN, J, FILIMONOV, K, MARKERT, C, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, FU, J, GAGLIARDI, CA, GAILLARD, L, JACOBS, P, GANTI, MS, GHAZIKHANIAN, V, MARTIN, L, GHOSH, P, GONZALEZ, JE, GORBUNOV, YG, GOS, H, GREBENYUK, O, JACOBS, WW, JAKL, P, JIA, F, JIANG, H, JONES, PG, GUERTIN, SM, BAUDOT, J, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KHODYREV, VY, KIM, BC, BHASIN, A, KIRYLUK, J, BEKELE, S, KISIEL, A, KISLOV, EM, KLEIN, SR, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, KOTCHENDA, L, MATIS, HS, KOUCHPIL, V, KOWALIK, KL, BELAGA, VV, KRAMER, M, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, KULIKOV, AI, KUMAR, A, MATULENKO, YA, KUZNETSOV, AA, LAMONT, MAC, LANDGRAF, JM, BELLINGERI-LAURIKAINEN, A, LANGE, S, LAPOINTE, S, LAUE, F, LAURET, J, LEBEDEV, A, LEDNICKY, R, MCCLAIN, CJ, LEE, CH, LEHOCKA, S, LEVINE, MJ, LI, C, BELLWIED, R, LI, Q, LI, Y, LIN, G, LIN, X, LINDENBAUM, SJ, MCSHANE, TS, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, BENEDOSSO, F, LIU, Z, MELNICK, Y, MESCHANIN, A, MILLANE, J, MILLER, ML, MINAEV, NG, GUIMARAES, KSFF, MIODUSZEWSKI, S, BHATI, AK, MIRONOV, C, MISCHKE, A, MISHRA, DK, MITCHELL, J, MOHANTY, B, MOLNAR, L, MOORE, CF, MOROZOV, DA, GUPTA, A, MUNHOZ, MG, NANDI, BK, BICHSEL, H, NATTRASS, C, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, GUTIERREZ, TD, OGAWA, A, OKOROKOV, V, OLDENBURG, M, BIELCIK, J, OLSON, D, PACHR, M, PAL, SK, PANEBRATSEV, Y, PANITKIN, SY, PAVLINOV, AI, HAAG, B, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, BIELCIKOVA, J, PERYT, W, PHATAK, SC, PICHA, R, PLANINIC, M, PLUTA, J, HALLMAN, TJ, POLJAK, N, PORILE, N, PORTER, J, POSKANZER, AM, POTEKHIN, M, BLAND, LC, POTREBENIKOVA, E, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, HAMED, A, and PUTSCHKE, J
Subjects: High Energy Physics::Phenomenology, Nuclear Theory, Heavy-Ion Collisions, P(P)Over-Bar Collisions, Physics, Nuclear, Large Transverse-Momentum, Proton-Proton Collisions, Au+Au Collisions, Thermal Hadron-Production, Fragmentation Functions, High Energy Physics::Experiment, Nuclear Experiment, Gev Cm Energy, Statistical Thermodynamics, Nuclear Collisions
Abstract: We present strange particle spectra and yields measured at midrapidity in root s = 200 GeV proton-proton (p + p) collisions at the BNL Relativistic Heavy Ion Collider (RHIC). We find that the previously observed universal transverse mass (m(T) = root PT2 + m(2)) scaling of hadron production in p + p collisions seems to break down at higher m(T) and that there is a difference in the shape of the m(T) spectrum between baryons and mesons. We observe midrapidity antibaryon to baryon ratios near unity for Lambda and Xi baryons and no dependence of the ratio on transverse momentum, indicating that our data do not yet reach the quark-jet dominated region. We show the dependence of the mean transverse momentum < p(T)> on measured charged particle multiplicity and on particle mass and infer that these trends are consistent with gluon-jet dominated particle production. The data are compared with previous measurements made at the CERN Super Proton Synchrotron and Intersecting Storage Rings and in Fermilab experiments and with leading-order and next-to-leading-order string fragmentation model predictions. We infer from these comparisons that the spectral shapes and particle yields from p + p collisions at RHIC energies have large contributions from gluon jets rather than from quark jets.
Published: 2007

23. Energy dependence of pi(+/-), p and (p)over-bar transverse momentum spectra for Au+Au collisions at root SNN=62.4 and 200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUMGART, S, BELAGA, VV, BELLINGERI-LAURIKAINEN, A, BELLWIED, R, BENEDOSSO, F, BETTS, RR, BHARADWAJ, S, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BILLMEIER, A, BLAND, LC, BLYTH, SL, BOMBARA, M, BONNER, BE, BOTJE, M, BOUCHET, J, BRANDIN, AV, BRAVAR, A, BURTON, TP, BYSTERSKY, M, CADMAN, RV, CAI, XZ, CAINES, H, SANCHEZ, MCD, CALLNER, J, CATU, O, CEBRA, D, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHOI, HA, CHRISTIE, W, CHUNG, SU, COFFIN, JP, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE MOURA, MM, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DIDENKO, L, DIETEL, T, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNIN, VB, DUNLOP, JC, MAZUMDAR, MRD, ECKARDT, V, EDWARDS, WR, EFIMOV, LG, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, FORNAZIER, KSF, FU, J, GAGLIARDI, CA, GAILLARD, L, GANTI, MS, GARCIA-SOLIS, E, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YG, GOS, H, GREBENYUK, O, GROSNICK, D, GUERTIN, SM, GUIMARAES, KSFF, GUPTA, N, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HENRY, TW, HEPPLEMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, D, HOLLIS, R, HORNER, MJ, HUANG, HZ, HUGHES, EW, HUMANIC, TJ, IGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKL, P, JIA, F, JIANG, H, JONES, PG, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIM, BC, KIRYLUK, J, KISIEL, A, KISLOV, EM, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, KOTCHENDA, L, KOUCHPIL, V, KOWALIK, KL, KRAMER, M, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, KULIKOV, AI, KUMAR, A, KURNADI, P, KUZNETSOV, AA, LAMONT, MAC, LANDGRAF, JM, LANGE, S, LAPOINTE, S, LAUE, F, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEHOCKA, S, LEVINE, MJ, LI, C, LI, Q, LI, Y, LIN, G, LIN, X, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONG, H, LONGACRE, RS, LOPEZ-NORIEGA, M, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, MA, JG, MA, YG, MAHAPATRA, DP, MAJKA, R, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MARTIN, L, MATIS, HS, MATULENKO, YA, MCCLAIN, CJ, MCSHANE, TS, MELNICK, Y, MESCHANIN, A, MILLANE, J, MILLER, ML, MINAEV, NG, MIODUSZEWSKI, S, MIRONOV, C, MISCHKE, A, MITCHELL, J, MOHANTY, B, MOLNAR, L, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NEPALI, C, NETRAKANTI, PK, NIKITIN, VA, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKOROKOV, V, OLDENBURG, M, OLSON, D, PACHR, M, PAL, SK, PANEBRATSEV, Y, PANITKIN, SY, PAVLINOV, AI, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PLANINIC, M, PLUTA, J, POLJAK, N, PORILE, N, POSKANZER, AM, POTEKHIN, M, POTREBENIKOVA, E, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PUTSCHKE, J, QATTAN, IA, RANIWALA, R, RANIWALA, S, RAY, RL, RAZIN, SV, REINNARTH, J, RELYEA, D, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SAVIN, I, SAZHIN, PS, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHEN, WQ, SHIMANSKIY, SS, SICHTERMANN, E, SIMON, F, SINGARAJU, RN, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPELTZ, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, AK, JT, TANG, AH, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TIMOSHENKO, S, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN DER KOLK, N, VAN LEEUWEN, M, MOLEN, AMV, VARMA, R, VASILEVSKI, IM, VASILIEV, AN, VERNET, R, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WAGGONER, WT, WANG, F, WANG, G, WANG, JS, WANG, XL, WANG, Y, WATSON, JW, WEBB, JC, WESTFALL, GD, WETZLER, A, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, J, XU, N, XU, QH, XU, Z, YEPES, P, YOO, IK, YUE, Q, YUREVICH, VI, ZHAN, W, ZHANG, H, ZHANG, WM, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZOULKARNEEV, R, ZOULKARNEEVA, Y, ZUBAREV, AN, and ZUO, JX
Subjects: D+Au Collisions, Particle Production, Jet Quenching, Nucleus-Nucleus Collisions, Star Experiment, Particle Identification, Hadron-Production, Collaboration, Recombination, Jet, Fragmentation, Quark-Gluon Plasma, Particle Ratios, Proton, Resistive Plate Chambers, Nuclear Modification Factor
Abstract: We study the energy dependense of the transverse momentum (PT) spectra for charged pions, protons and anti-protons for An + An collisions at root(NN)-N-s = 62.4 and 200 GeV. Data are presented at mid-rapidity (broken vertical bar y broken vertical bar < 0.5) for 0.2 < PT < 12 GeV/c. In the intermediate PT region (2 < PT < 6 GeV/c), the nuclear modification factor is higher at 62.4 GeV than at 200 GeV, while at higher PT (PT > 7 GeV/c) the modification is similar for both energies. The p/pi(+) and (p) over bar/pi(-) ratios for central collisions at root(NN)-N-s = 62.4 GeV peak at PT similar or equal to 2 GeV/c. In the PT range where recombination is expected to dominate, the p/pi(+) ratios at 62.4 GeV are larger than at 200 GeV, while the (p) over bar/pi(-) ratios are smaller. For PT > 2 GeV/c, the (p) over bar/pi(-) ratios at the two beam energies are independent of P-T and centrality indicating that the dependence of the (p) over bar/pi(-) ratio on P-T does not change between 62.4 and 200 GeV. These findings challenge various models incorporating jet quenching and/or constituent quark coalescence. (C) 2007
Published: 2007

24. Transverse momentum and centrality dependence of High-p(T) nonphotonic electron suppression in Au plus Au collisions at root(NN)-N-S=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, BAUMGART, S, BELAGA, VV, BELLINGERI-LAURIKAINEN, A, BELLWIED, R, BENEDOSSO, F, BETTS, RR, BHARDWAJ, S, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BLYTH, SL, BOMBARA, M, BONNER, BE, BOTJE, M, BOUCHET, J, BRANDIN, AV, BRAVAR, A, BURTON, TP, BYSTERSKY, M, CADMAN, RV, CAI, XZ, CAINES, H, SANCHEZ, MCD, CALLNER, J, CATU, O, CEBRA, D, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, SU, COFFIN, JP, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE MOURA, MM, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DIDENKO, L, DIETEL, T, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, DUNIN, VB, DUNLOP, JC, MAZUMDAR, MRD, ECKARDT, V, EDWARDS, WR, EFIMOV, LG, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, FU, J, GAGLIARDI, CA, GAILLARD, L, GANTI, MS, GARCIA-SOLIS, E, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YG, GOS, H, GREBENYUK, O, GROSNICK, D, GUERTIN, SM, GUIMARAES, KSFF, GUPTA, N, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HENRY, TW, HEPPELMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HOFMAN, D, HOLLIS, R, HORNER, MJ, HUANG, HZ, HUGHES, EW, HUMANIC, TJ, IGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKL, P, JIA, F, JONES, PG, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, KIM, BC, KIRYLUK, J, KISIEL, A, KISLOV, EM, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, KOTCHENDA, L, KOUCHPIL, V, KOWALIK, KL, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, KULIKOV, AI, KUMAR, A, KURNADI, P, KUZNETSOV, AA, LAMONT, MAC, LANDGRAF, JM, LANGE, S, LAPOINTE, S, LAUE, F, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEHOCKA, S, LEVINE, MJ, LI, C, LI, Q, LI, Y, LIN, G, LIN, X, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, MA, JG, MA, YG, MAGESTRO, D, MAHAPATRA, DP, MAJKA, R, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MARTIN, L, MATIS, HS, MATULENKO, YA, MCCLAIN, CJ, MCSHANE, TS, MELNICK, Y, MESCHANIN, A, MILLANE, J, MILLER, ML, MINAEV, NG, MIODUSZEWSKI, S, MIRONOV, C, MISCHKE, A, MITCHELL, J, MOHANTY, B, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NEPALI, NS, NETRAKANTI, PK, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKOROKOV, V, OLDENBURG, M, OLSON, D, PACHR, M, PAL, SK, PANEBRATSEV, Y, PAVLINOV, AI, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PLANINIC, M, PLUTA, J, POLJAK, N, PORILE, N, POSKANZER, AM, POTEKHIN, M, POTREBENIKOVA, E, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PUTSCHKE, J, QATTAN, IA, RANIWALA, R, RANIWALA, S, RAY, RL, RELYEA, D, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SAZHIN, PS, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHEN, WQ, SHIMANSKIY, SS, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, SPELTZ, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STASZAK, D, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Z, SURROW, B, SYMONS, TJM, DE TOLEDO, AS, TAKAHASHI, J, TANG, AH, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TIMOSHENKO, S, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN DER KOLK, N, VAN LEEUWEN, M, VANDER MOLEN, AM, VARMA, R, VASILEVSKI, IM, VASILIEV, AN, VERNET, R, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WAGGONER, WT, WANG, F, WANG, G, WANG, JS, WANG, XL, WANG, Y, WATSON, JW, WEBB, JC, WESTFALL, GD, WETZLER, A, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WU, J, WU, Y, XU, N, XU, QH, XU, Z, YEPES, P, YOO, IK, YUE, Q, YUREVICH, VI, ZHAN, W, ZHANG, H, ZHANG, WM, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, ZOULKARNEEVA, Y, ZUBAREV, AN, and ZUO, JX
Subjects: Perturbative Qcd, Energy-Loss, High Energy Physics::Phenomenology, Physics, Multidisciplinary, Particle Identification, High Energy Physics::Experiment, Nuclear Experiment, Tomography, Heavy-Quark Production
Abstract: The STAR collaboration at the BNL Relativistic Heavy-Ion Collider (RHIC) reports measurements of the inclusive yield of nonphotonic electrons, which arise dominantly from semileptonic decays of heavy flavor mesons, over a broad range of transverse momenta (1.2 < p(T)< 10 GeV/c) in p+p, d+Au, and Au+Au collisions at root s(NN)=200 GeV. The nonphotonic electron yield exhibits an unexpectedly large suppression in central Au+Au collisions at high p(T), suggesting substantial heavy-quark energy loss at RHIC. The centrality and p(T) dependences of the suppression provide constraints on theoretical models of suppression.
Published: 2007

25. Partonic flow and phi-meson production in Au+Au collisions at root s(NN)=200 GeV

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, ANDERSON, BD, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, LIU, J, LIU, L, LJUBICIC, T, LLOPE, WJ, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, BHATI, AK, GROSNICK, D, MA, GL, MA, JG, MA, YG, MAHAPATRA, DP, MAJKA, R, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MARTIN, L, GRUBE, B, BICHSEL, H, MATIS, HS, MATULENKO, YA, MCCLAIN, CJ, MCSHANE, TS, MELNICK, Y, MESCHANIN, A, MILLANE, J, MILLER, ML, MINAEV, NG, GUERTIN, SM, MIODUSZEWSKI, S, BIELCIK, J, MIRONOV, C, MISCHKE, A, MITCHELL, J, MOHANTY, B, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, GUIMARAES, KSFF, NAYAK, TK, NELSON, JM, BIELCIKOVA, J, NEPALI, C, NETRAKANTI, PK, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKOROKOV, V, GUPTA, N, OLDENBURG, M, OLSON, D, PACHR, M, BLAND, LC, PAL, SK, PANEBRATSEV, Y, PAVLINOV, AI, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, HAAG, B, PERKINS, C, PERYT, W, PHATAK, SC, PLANINIC, M, BLYTH, SL, PLUTA, J, POLJAK, N, PORILE, N, POSKANZER, AM, POTEKHIN, M, HALLMAN, TJ, POTREBENIKOVA, E, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PUTSCHKE, J, BOMBARA, M, QATTAN, IA, RANIWALA, R, RANIWALA, S, RAY, RL, HAMED, A, RELYEA, D, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, BONNER, BE, ROSE, A, ROY, C, RUAN, L, HARRIS, JW, RUSSCHER, MJ, SAHOO, R, SAKREJDA, I, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, BOTJE, M, SAZHIN, PS, SCHAMBACH, J, HE, W, SCHARENBERG, RP, SCHMITZ, N, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, BOUCHET, J, SHARMA, M, BAUMGART, S, SHEN, WQ, SHIMANSKIY, SS, SICHTERMANN, EP, SIMON, F, SINGARAJU, RN, SMIRNOV, N, SNELLINGS, R, SORENSEN, P, SOWINSKI, J, BRANDIN, AV, HEINZ, M, SPELTZ, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STASZAK, D, STOCK, R, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, HENRY, TW, BRAVAR, A, SUAREZ, MC, SUBBA, NL, SUMBERA, M, SUN, XM, SUN, Z, SURROW, B, SYMONS, TJM, SZANTO DE TOLEDO, A, TAKAHASHI, J, HEPPELMANN, S, TANG, AH, BURTON, TP, TARNOWSKY, T, THOMAS, JH, TIMMINS, AR, TIMOSHENKO, S, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, HIPPOLYTE, B, TSAI, OD, ULERY, J, BYSTERSKY, M, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN DER KOLK, N, VAN LEEUWEN, M, MOLEN, AMV, VARMA, R, HIRSCH, A, VASILEVSKI, IM, VASILIEV, AN, VERNET, R, CADMAN, RV, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WAGGONER, WT, WANG, F, HJORT, E, WANG, G, WANG, JS, WANG, XL, WANG, Y, CAI, XZ, WATSON, JW, WEBB, JC, WESTFALL, GD, WETZLER, A, WHITTEN, C, HOFFMAN, AM, WIEMAN, H, WISSINK, SW, WITT, R, WU, J, WU, Y, CAINES, H, XU, N, XU, QH, XU, Z, YEPES, P, HOFFMANN, GW, YOO, IK, YUE, Q, YUREVICH, VI, ZHAN, W, ZHANG, H, ZHANG, WM, CALDERON DE LA BARCA SANCHEZ, M, ZHANG, Y, ZHANG, ZP, ZHAO, Y, HOFMAN, DJ, ZHONG, C, ZHOU, J, ZOULKARNEEV, R, ZOULKARNEEVA, Y, ZUBAREV, AN, ZUO, JX, CALLNER, J, CATU, O, CEBRA, D, CHAJECKI, Z, HOLLIS, RS, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHEN, JY, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, CHUNG, SU, BELAGA, VV, COFFIN, JP, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DASH, S, DAUGHERITY, M, DE MOURA, MM, DEDOVICH, TG, HORNER, MJ, DEPHILLIPS, M, DEREVSCHIKOV, AA, DIDENKO, L, DIETEL, T, DJAWOTHO, P, DOGRA, SM, DONG, X, DRACHENBERG, JL, DRAPER, JE, DU, F, HUANG, HZ, DUNIN, VB, DUNLOP, JC, MAZUMDAR, MRD, ECKARDT, V, EDWARDS, WR, EFIMOV, LG, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, HUGHES, EW, ESTIENNE, M, FACHINI, P, FATEMI, R, FEDORISIN, J, FENG, A, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, FU, J, HUMANIC, TJ, GAGLIARDI, CA, GAILLARD, L, GANTI, MS, GARCIA-SOLIS, E, GHAZIKHANIAN, V, GHOSH, P, GORBUNOV, YG, GOS, H, GREBENYUK, O, IGO, G, IORDANOVA, A, JACOBS, P, JACOBS, WW, JAKL, P, JIA, F, BELLINGERI-LAURIKAINEN, A, JONES, PG, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KETTLER, D, KHODYREV, VY, BELLWIED, R, KIM, BC, KIRYLUK, J, KISIEL, A, KISLOV, EM, KLEIN, SR, KNOSPE, AG, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, BENEDOSSO, F, KOTCHENDA, L, KOUCHPIL, V, KOWALIK, KL, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, KULIKOV, AI, KUMAR, A, KURNADI, P, BETTS, RR, KUZNETSOV, AA, LAMONT, MAC, LANDGRAF, JM, LANGE, S, LAPOINTE, S, LAUE, F, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, BHARDWAJ, S, LEHOCKA, S, LEVINE, MJ, LI, C, LI, Q, LI, Y, LIN, G, LIN, X, LINDENBAUM, SJ, LISA, MA, LIU, F, BHASIN, A, and LIU, H
Subjects: High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, Physics, Multidisciplinary, Signature, Collaboration, Nuclei, Qcd, Anisotropic Flow, Photoproduction, Elliptic Flow, Perspective, Quark-Gluon Plasma, High Energy Physics::Experiment, Nuclear Experiment
Abstract: We present first measurements of the phi-meson elliptic flow (v(2)(p(T))) and high-statistics p(T) distributions for different centralities from root s(NN) = 200 GeV Au+Au collisions at RHIC. In minimum bias collisions the v(2) of the phi meson is consistent with the trend observed for mesons. The ratio of the yields of the Omega to those of the phi as a function of transverse momentum is consistent with a model based on the recombination of thermal s quarks up to p(T)similar to 4 GeV/c, but disagrees at higher momenta. The nuclear modification factor (R-CP) of phi follows the trend observed in the K-S(0) mesons rather than in Lambda baryons, supporting baryon-meson scaling. These data are consistent with phi mesons in central Au+Au collisions being created via coalescence of thermalized s quarks and the formation of a hot and dense matter with partonic collectivity at RHIC.
Published: 2007

26. Strange baryon resonance production in root s(NN)=200 GeV p+p and Au+Au collisions

Author: ABELEV, BI, AGGARWAL, MM, AHAMMED, Z, AMONETT, J, ANDERSON, BD, ANDERSON, M, ARKHIPKIN, D, AVERICHEV, GS, BAI, Y, BALEWSKI, J, BARANNIKOVA, O, BARNBY, LS, BAUDOT, J, BEKELE, S, BELAGA, VV, BELLINGERI-LAURIKAINEN, A, BELLWIED, R, BENEDOSSO, F, BHARDWAJ, S, BHASIN, A, BHATI, AK, BICHSEL, H, BIELCIK, J, BIELCIKOVA, J, BLAND, LC, BLYTH, SL, BONNER, BE, BOTJE, M, BOUCHET, J, BRANDIN, AV, BRAVAR, A, BURTON, TP, BYSTERSKY, M, CADMAN, RV, CAI, XZ, CAINES, H, SANCHEZ, MCDLB, CASTILLO, J, CATU, O, CEBRA, D, CHAJECKI, Z, CHALOUPKA, P, CHATTOPADHYAY, S, CHEN, HF, CHEN, JH, CHENG, J, CHERNEY, M, CHIKANIAN, A, CHRISTIE, W, COFFIN, JP, CORMIER, TM, COSENTINO, MR, CRAMER, JG, CRAWFORD, HJ, DAS, D, DAS, S, DASH, S, DAUGHERITY, M, DE MOURA, MM, DEDOVICH, TG, DEPHILLIPS, M, DEREVSCHIKOV, AA, DIDENKO, L, DIETEL, T, DJAWOTHO, P, DOGRA, SM, DONG, WJ, DONG, X, DRAPER, JE, DU, F, DUNIN, VB, DUNLOP, JC, MAZUMDAR, MRD, ECKARDT, V, EDWARDS, WR, EFIMOV, LG, EMELIANOV, V, ENGELAGE, J, EPPLEY, G, ERAZMUS, B, ESTIENNE, M, FACHINI, P, FATEMI, R, FEDORISIN, J, FILIMONOV, K, FILIP, P, FINCH, E, FINE, V, FISYAK, Y, FU, J, GAGLIARDI, CA, GAILLARD, L, GANTI, MS, GAUDICHET, L, GHAZIKHANIAN, V, GHOSH, P, GONZALEZ, JE, GORBUNOV, YG, GOS, H, GREBENYUK, O, GROSNICK, D, GUERTIN, SM, GUIMARAES, KSFF, GUPTA, N, GUTIERREZ, TD, HAAG, B, HALLMAN, TJ, HAMED, A, HARRIS, JW, HE, W, HEINZ, M, HENRY, TW, HEPPLEMANN, S, HIPPOLYTE, B, HIRSCH, A, HJORT, E, HOFFMAN, AM, HOFFMANN, GW, HORNER, MJ, HUANG, HZ, HUANG, SL, HUGHES, EW, HUMANIC, TJ, IGO, G, JACOBS, P, JACOBS, WW, JAKL, P, JIA, F, JIANG, H, JONES, PG, JUDD, EG, KABANA, S, KANG, K, KAPITAN, J, KAPLAN, M, KEANE, D, KECHECHYAN, A, KHODYREV, VY, KIM, BC, KIRYLUK, J, KISIEL, A, KISLOV, EM, KLEIN, SR, KOCOLOSKI, A, KOETKE, DD, KOLLEGGER, T, KOPYTINE, M, KOTCHENDA, L, KOUCHPIL, V, KOWALIK, KL, KRAMER, M, KRAVTSOV, P, KRAVTSOV, VI, KRUEGER, K, KUHN, C, KULIKOV, AI, KUMAR, A, KUZNETSOV, AA, LAMONT, MAC, LANDGRAF, JM, LANGE, S, LAPOINTE, S, LAUE, F, LAURET, J, LEBEDEV, A, LEDNICKY, R, LEE, CH, LEHOCKA, S, LEVINE, MJ, LI, C, LI, Q, LI, Y, LIN, G, LIN, X, LINDENBAUM, SJ, LISA, MA, LIU, F, LIU, H, LIU, J, LIU, L, LIU, Z, LJUBICIC, T, LLOPE, WJ, LONG, H, LONGACRE, RS, LOVE, WA, LU, Y, LUDLAM, T, LYNN, D, MA, GL, MA, JG, MA, YG, MAGESTRO, D, MAHAPATRA, DP, MAJKA, R, MANGOTRA, LK, MANWEILER, R, MARGETIS, S, MARKERT, C, MARTIN, L, MATIS, HS, MATULENKO, YA, MCCLAIN, CJ, MCSHANE, TS, MELNICK, Y, MESCHANIN, A, MILLANE, J, MILLER, ML, MINAEV, NG, MIODUSZEWSKI, S, MIRONOV, C, MISCHKE, A, MISHRA, DK, MITCHELL, J, MOHANTY, B, MOLNAR, L, MOORE, CF, MOROZOV, DA, MUNHOZ, MG, NANDI, BK, NATTRASS, C, NAYAK, TK, NELSON, JM, NETRAKANTI, PK, NOGACH, LV, NURUSHEV, SB, ODYNIEC, G, OGAWA, A, OKOROKOV, V, OLDENBURG, M, OLSON, D, PACHR, M, PAL, SK, PANEBRATSEV, Y, PANITKIN, SY, PAVLINOV, AI, PAWLAK, T, PEITZMANN, T, PEREVOZTCHIKOV, V, PERKINS, C, PERYT, W, PHATAK, SC, PICHA, R, PLANINIC, M, PLUTA, J, POLJAK, N, PORILE, N, PORTER, J, POSKANZER, AM, POTEKHIN, M, POTREBENIKOVA, E, POTUKUCHI, BVKS, PRINDLE, D, PRUNEAU, C, PUTSCHKE, J, RAKNESS, G, RANIWALA, R, RANIWALA, S, RAY, RL, RAZIN, SV, REINNARTH, J, RELYEA, D, RETIERE, F, RIDIGER, A, RITTER, HG, ROBERTS, JB, ROGACHEVSKIY, OV, ROMERO, JL, ROSE, A, ROY, C, RUAN, L, RUSSCHER, MJ, SAHOO, R, SAKUMA, T, SALUR, S, SANDWEISS, J, SARSOUR, M, SAZHIN, PS, SCHAMBACH, J, SCHARENBERG, RP, SCHMITZ, N, SCHWEDA, K, SEGER, J, SELYUZHENKOV, I, SEYBOTH, P, SHABETAI, A, SHAHALIEV, E, SHAO, M, SHARMA, M, SHEN, WQ, SHIMANSKIY, SS, SICHTERMANN, E, SIMON, F, SINGARAJU, RN, SMIRNOV, N, SNELLINGS, R, SOOD, G, SORENSEN, P, SOWINSKI, J, SPELTZ, J, SPINKA, HM, SRIVASTAVA, B, STADNIK, A, STANISLAUS, TDS, STOCK, R, STOLPOVSKY, A, STRIKHANOV, M, STRINGFELLOW, B, SUAIDE, AAP, SUGARBAKER, E, SUMBERA, M, SUN, Z, SURROW, B, SWANGER, M, SYMONS, TJM, DE TOLEDO, AS, TAI, A, TAKAHASHI, J, TANG, AH, TARNOWSKY, T, THEIN, D, THOMAS, JH, TIMMINS, AR, TIMOSHENKO, S, TOKAREV, M, TRAINOR, TA, TRENTALANGE, S, TRIBBLE, RE, TSAI, OD, ULERY, J, ULLRICH, T, UNDERWOOD, DG, VAN BUREN, G, VAN DER KOLK, N, VAN LEEUWEN, M, MOLEN, AMV, VARMA, R, VASILEVSKI, IM, VASILIEV, AN, VERNET, R, VIGDOR, SE, VIYOGI, YP, VOKAL, S, VOLOSHIN, SA, WAGGONER, WT, WANG, F, WANG, G, WANG, JS, WANG, XL, WANG, Y, WATSON, JW, WEBB, JC, WESTFALL, GD, WETZLER, A, WHITTEN, C, WIEMAN, H, WISSINK, SW, WITT, R, WOOD, J, WU, J, XU, N, XU, QH, XU, Z, YEPES, P, YOO, K, YUREVICH, I, ZHAN, W, ZHANG, H, ZHANG, WM, ZHANG, Y, ZHANG, ZP, ZHAO, Y, ZHONG, C, ZOULKARNEEV, R, ZOULKARNEEVA, Y, ZUBAREV, AN, and ZUO, JX
Subjects: Heavy-Ion Collisions, Freeze-Out
Abstract: We report the measurements of Sigma(1385) and Lambda(1520) production in p+p and Au+Au collisions at root s(NN)=200 GeV from the STAR Collaboration. The yields and the p(T) spectra are presented and discussed in terms of chemical and thermal freeze-out conditions and compared to model predictions. Thermal and microscopic models do not adequately describe the yields of all the resonances produced in central Au+Au collisions. Our results indicate that there may be a time span between chemical and thermal freeze-out during which elastic hadronic interactions occur.
Published: 2006

27. Alveolar Macrophages Are Integral to Compensatory Lung Regrowth in Mice after Pneumonectomy.

Author: Mazan, MR, primary, Lascola, K, additional, Rosenbaum, M, additional, Gruntman, A, additional, and Hoffman, AM, additional
Published: 2009
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28. Bone Marrow Derived Mesenchymal Stem Cells Improve Lung Regeneration in a Mouse Model of Emphysema.

Author: Lascola, KM, primary, Mazan, MR, additional, Ingenito, EP, additional, and Hoffman, AM, additional
Published: 2009
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29. Relationship between dynamic respiratory mechanics and disease heterogeneity in sheep lavage injury.

Author: Black CLB, Hoffman AM, Tsai LW, Ingenito EP, Suki B, Kaczka DW, Simon BA, and Lutchen KR
Abstract: Objective: Bone marrow (BM) dysfunction after trauma and hemorrhagic shock (T/HS) results in a decrease in clonogenic growth of BM progenitors through a plasma-mediated process. Although sex hormones have been shown to modulate some end-organ injury after shock, post-T/HS BM dysfunction has only been studied in male animals. Therefore, the present study examines the effects of sex hormones on post-T/HS BM dysfunction by measuring clonogenic growth of BM progenitors in castrated male rats and in ovariectomized and proestrus female rats.Design: Laboratory experiment.Setting: University surgical research laboratory.Subject: Castrated and noncastrated male and ovariectomized and proestrus female Sprague-Dawley rats.Intervention: All rats were subjected to either T/HS or sham shock with laparotomy (n = 3-5 per group). At 3 hrs after resuscitation, the rats were killed and plasma and BM mononuclear cells from bilateral femurs were harvested.Measurements and Main Results: BM mononuclear cells were cultured for erythroid burst-forming unit and granulocyte-macrophage colony-forming unit colonies to assess the extent of progenitor BM dysfunction. BM from noncastrated male rats subjected to T/HS demonstrated a significant decrease in granulocyte-macrophage colony-forming unit and erythroid burst-forming unit colony formation compared with BM of all the sham-shock groups and with the castrated male and both female rat groups subjected to T/HS. In addition, plasma from noncastrated shocked male rats incubated in vitro with BM cells from unmanipulated male rats caused a significant suppression of BM granulocyte-macrophage colony-forming unit and erythroid burst-forming unit colonies compared with plasma from castrated rats subjected to either sham shock with laparotomy or T/HS.Conclusion: The profound BM dysfunction observed in noncastrated male rats after T/HS is not observed in proestrus female rats and castrated male rats. In addition, the in vitro plasma-mediated BM suppression present in male rats after T/HS is also lost in castrated male rats. Sex hormones seem to play a significant role in BM dysfunction after T/HS. [ABSTRACT FROM AUTHOR]
Published: 2007
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30. Computer expert systems for African-American smokers in physicians offices: A feasibility study.

Author: Hoffman AM, Redding CA, Goldberg D, Añel D, Prochaska JO, Meyer PM, and Pandey D
Abstract: BACKGROUND.: Stage-based computer expert systems (CES), delivered in physician offices, may offer unique opportunities to combine high participation and high efficacy, resulting in a high public health impact. Applying this technology in settings serving low-income African-American smokers, with the addition of practical tools for stress reduction, may help to reduce disparities in morbidity and mortality from smoking-related diseases. METHODS.: Ninety-eight African-American smokers were recruited from a publicly funded, continuity care clinic waiting room to a study of computer interactive feedback and stress reduction audiotapes. The study was designed to assess: participation and retention rates; acceptability of both the computer expert system and the audiotapes; the fit of the transtheoretical model for the target population; and the 6-month shift in stages of change. RESULTS.: Overall, 55.6% of invited smokers participated, 75.5% were seen at all three observation points. The CES and the audiotape were rated as highly interesting, relevant, and new, and most participants tried them. The predictable relationship between stage and decisional balance was reproduced in this low income African-American population. Significant stage progression occurred from baseline to 3 months (P = 0.011), from 3 to 6 months (P = 0.0001), and from baseline to 6 months (P = 0.0001). CONCLUSIONS.: These data support the feasibility, acceptability and potential efficacy of stage-tailored computer interactive feedback plus stress reduction intervention delivered at the point of service to low-income African-Americans. Copyright © 2006 by Elsevier Inc. [ABSTRACT FROM AUTHOR]
Published: 2006
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31. Comparison of variable and conventional ventilation in a sheep saline lavage lung injury model.

Author: Bellardine CL, Hoffman AM, Tsai L, Ingenito EP, Arold SP, Lutchen KR, Suki B, Bellardine, Carissa L, Hoffman, Andrew M, Tsai, Larry, Ingenito, Edward P, Arold, Stephen P, Lutchen, Kenneth R, and Suki, Béla
Abstract: Objective: There has recently been considerable interest in alternative lung-protective ventilation strategies such as variable ventilation (VV). We aimed at testing VV in a large animal lung injury model and exploring the mechanism of improvement in gas exchange seen with VV.Design: Randomized, controlled comparative ventilation study.Setting: Research laboratory at a veterinary hospital.Subjects: Female sheep weighing 59.8 +/- 10.57 kg and excised calf lungs.Interventions: In a sheep saline lavage model of lung injury, we applied VV, whereby tidal volume (VT) and frequency (f) varied on each breath. Sheep were randomized into one of two groups (VV, n = 7; or control, n = 6) and ventilated for 4 hrs with all mean ventilation settings matched.Measurements and Main Results: Gas exchange, lung mechanics, and hemodynamic measures were recorded over the 4 hrs. VV sheep showed improvement in gas exchange (i.e., oxygenation and carbon dioxide elimination) and ventilation pressures (i.e., reduced mean and peak airway pressures) but control sheep did not. VV sheep also displayed lower-lung elastance and mechanical heterogeneity in comparison with control sheep from 2 to 4 hrs of ventilation. To study the mechanism behind improvements seen with VV, we examined the time course associated with the enhanced recruitment occurring during VV in eight saline-lavaged excised calf lungs. We found that the recruitment associated with a larger VT during VV lasted over 200 secs, nearly an order of magnitude greater than the average time interval between large VT deliveries during VV.Conclusions: The application of VV in a large animal model of lung injury results in improved gas exchange and superior lung mechanics in comparison with CV that can be explained at least partially by the long-lasting effects of the recruitments occurring during VV. [ABSTRACT FROM AUTHOR]
Published: 2006
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32. Dynamic respiratory mechanics measurements for optimization of ventilator settings in acute lung injury.

Author: Habib RH, Assaly RA, Bellardine Black CL, Hoffman AM, Tsai LW, Ingenito EP, Suki B, Kaczka DW, Simon BA, and Lutchen KR
Published: 2007
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33. The value of long-term ecological research for evolutionary insights.

Author: Cocciardi JM, Hoffman AM, Alvarado-Serrano DF, Anderson J, Blumstein M, Boehm EL, Bolin LG, Borokini IT, Bradburd GS, Branch HA, Brudvig LA, Chen Y, Collins SL, Des Marais DL, Gamba D, Hanan NP, Howard MM, Jaros J, Juenger TE, Kooyers NJ, Kottler EJ, Lau JA, Menon M, Moeller DA, Mozdzer TJ, Sheth SN, Smith M, Toll K, Ungerer MC, Vahsen ML, Wadgymar SM, Waananen A, Whitney KD, and Avolio ML
Subjects: Ecosystem, Climate Change, Biological Evolution, Ecology
Abstract: Scientists must have an integrative understanding of ecology and evolution across spatial and temporal scales to predict how species will respond to global change. Although comprehensively investigating these processes in nature is challenging, the infrastructure and data from long-term ecological research networks can support cross-disciplinary investigations. We propose using these networks to advance our understanding of fundamental evolutionary processes and responses to global change. For ecologists, we outline how long-term ecological experiments can be expanded for evolutionary inquiry, and for evolutionary biologists, we illustrate how observed long-term ecological patterns may motivate new evolutionary questions. We advocate for collaborative, multi-site investigations and discuss barriers to conducting evolutionary work at network sites. Ultimately, these networks offer valuable information and opportunities to improve predictions of species' responses to global change., (© 2024. Springer Nature Limited.)
Published: 2024
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34. Best practices to evaluate the impact of biomedical research software-metric collection beyond citations.

Author: Afiaz A, Ivanov AA, Chamberlin J, Hanauer D, Savonen CL, Goldman MJ, Morgan M, Reich M, Getka A, Holmes A, Pati S, Knight D, Boutros PC, Bakas S, Caporaso JG, Del Fiol G, Hochheiser H, Haas B, Schloss PD, Eddy JA, Albrecht J, Fedorov A, Waldron L, Hoffman AM, Bradshaw RL, Leek JT, and Wright C
Subjects: Humans, United States, Computational Biology methods, Software, Biomedical Research methods
Abstract: Motivation: Software is vital for the advancement of biology and medicine. Impact evaluations of scientific software have primarily emphasized traditional citation metrics of associated papers, despite these metrics inadequately capturing the dynamic picture of impact and despite challenges with improper citation., Results: To understand how software developers evaluate their tools, we conducted a survey of participants in the Informatics Technology for Cancer Research (ITCR) program funded by the National Cancer Institute (NCI). We found that although developers realize the value of more extensive metric collection, they find a lack of funding and time hindering. We also investigated software among this community for how often infrastructure that supports more nontraditional metrics were implemented and how this impacted rates of papers describing usage of the software. We found that infrastructure such as social media presence, more in-depth documentation, the presence of software health metrics, and clear information on how to contact developers seemed to be associated with increased mention rates. Analysing more diverse metrics can enable developers to better understand user engagement, justify continued funding, identify novel use cases, pinpoint improvement areas, and ultimately amplify their software's impact. Challenges are associated, including distorted or misleading metrics, as well as ethical and security concerns. More attention to nuances involved in capturing impact across the spectrum of biomedical software is needed. For funders and developers, we outline guidance based on experience from our community. By considering how we evaluate software, we can empower developers to create tools that more effectively accelerate biological and medical research progress., Availability and Implementation: More information about the analysis, as well as access to data and code is available at https://github.com/fhdsl/ITCR_Metrics_manuscript_website., (© The Author(s) 2024. Published by Oxford University Press.)
Published: 2024
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35. Ten simple rules for teaching an introduction to R.

Author: Hoffman AM and Wright C
Subjects: Humans, Software, Computational Biology education, Teaching
Abstract: Competing Interests: The authors have declared that no competing interests exist.
Published: 2024
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36. Reply.

Author: Spechler SJ, Reddy CA, Allen-Brady K, Uchida AM, Peterson KA, Hoffman AM, and Souza RF
Published: 2024
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37. Prevented harm and cost avoidance with pharmacist intervention while utilizing a discharge medication reconciliation tool.

Author: Hoffman AM, Walls JL, Prusch A, and Roberts J
Subjects: Humans, Patient Discharge, Pharmacists, Retrospective Studies, Hospitals, Teaching, Medication Reconciliation, Pharmacy Service, Hospital
Abstract: Purpose: The aim of this study was to determine prevented harm and cost avoidance following pharmacist intervention utilizing a discharge medication reconciliation tool., Methods: A retrospective chart review was conducted to identify patients with pharmacist-initiated, provider-accepted discharge medication reconciliation interventions completed at a community teaching hospital in January 2021. Investigators assigned the discrepancies targeted for intervention a National Coordinating Council for Medication Error Reporting and Prevention (NCC MERP) category, probability of harm, and calculated cost avoidance. The primary endpoint was the total cost avoidance associated with discharge medication reconciliation., Results: Pharmacists intervened 190 times in January 2021, avoiding an estimated $46,958 to $231,032 in cost. High-risk medications were associated with $33,920 to $147,203 in cost avoidance. The 3 high-risk therapeutic classes associated with the highest cost avoidance were insulin ($16,738-$70,793), antithrombotics ($13,884-$60,016), and opioids ($2,638-$11,834)., Conclusion: Targeted pharmacist discharge medication reconciliation and related interventions avoid significant cost and patient harm., (© American Society of Health-System Pharmacists 2023. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
Published: 2024
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38. Achalasia is Strongly Associated With Eosinophilic Esophagitis and Other Allergic Disorders.

Author: Reddy CA, Allen-Brady K, Uchida AM, Peterson KA, Hoffman AM, Souza RF, and Spechler SJ
Subjects: Humans, Female, Middle Aged, Adult, Male, Eosinophils, Eosinophilic Esophagitis complications, Eosinophilic Esophagitis epidemiology, Eosinophilic Esophagitis diagnosis, Esophageal Achalasia complications, Esophageal Achalasia epidemiology, Asthma complications
Abstract: Background & Aims: Achalasia has been assumed to be an autoimmune disease targeting esophageal myenteric neurons. Recently, we proposed an alternative hypothesis that achalasia sometimes might be allergy-driven, caused by a form of eosinophilic esophagitis (EoE) in which activated eosinophils and/or mast cells infiltrating esophageal muscle release products that disrupt motility and damage myenteric neurons. To seek epidemiologic support for this hypothesis, we identified patients with achalasia in the Utah Population Database, and explored their frequency of having EoE and other allergic disorders., Methods: We used International Classification of Diseases codes to identify patients with achalasia and allergic disorders including EoE, asthma, atopic dermatitis, contact dermatitis, allergic rhinitis, allergic conjunctivitis, hives/urticaria, and anaphylaxis. We calculated relative risk (RR) for each allergic disorder by comparing the number observed in patients with achalasia with the expected number in individuals matched for birthyear and sex, and we performed subanalyses for patients age ≤40 versus age >40 years., Results: Among 844 patients with achalasia identified (55% female; median age at diagnosis, 58 years), 402 (47.6%) had ≥1 allergic disorder. Fifty-five patients with achalasia (6.5%) had EoE (1.67 EoE cases expected), for a RR of 32.9 (95% confidence interval, 24.8-42.8; P < .001). In 208 patients with achalasia age ≤40 years, the RR for EoE was 69.6 (95% confidence interval, 46.6-100.0; P < .001). RR also was increased significantly for all other allergic disorders evaluated (all greater than 3-fold higher than population rates)., Conclusions: Achalasia is strongly associated with EoE and other allergic disorders. These data support the hypothesis that achalasia sometimes might have an allergic etiology., (Copyright © 2024 AGA Institute. Published by Elsevier Inc. All rights reserved.)
Published: 2024
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39. What's the best chatbot for me? Researchers put LLMs through their paces.

Author: Humphries EM, Wright C, Hoffman AM, Savonen C, and Leek JT
Published: 2023
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40. Evaluation of software impact designed for biomedical research: Are we measuring what's meaningful?

Author: Afiaz A, Ivanov AA, Chamberlin J, Hanauer D, Savonen CL, Goldman MJ, Morgan M, Reich M, Getka A, Holmes A, Pati S, Knight D, Boutros PC, Bakas S, Caporaso JG, Del Fiol G, Hochheiser H, Haas B, Schloss PD, Eddy JA, Albrecht J, Fedorov A, Waldron L, Hoffman AM, Bradshaw RL, Leek JT, and Wright C
Abstract: Software is vital for the advancement of biology and medicine. Through analysis of usage and impact metrics of software, developers can help determine user and community engagement. These metrics can be used to justify additional funding, encourage additional use, and identify unanticipated use cases. Such analyses can help define improvement areas and assist with managing project resources. However, there are challenges associated with assessing usage and impact, many of which vary widely depending on the type of software being evaluated. These challenges involve issues of distorted, exaggerated, understated, or misleading metrics, as well as ethical and security concerns. More attention to the nuances, challenges, and considerations involved in capturing impact across the diverse spectrum of biological software is needed. Furthermore, some tools may be especially beneficial to a small audience, yet may not have comparatively compelling metrics of high usage. Although some principles are generally applicable, there is not a single perfect metric or approach to effectively evaluate a software tool's impact, as this depends on aspects unique to each tool, how it is used, and how one wishes to evaluate engagement. We propose more broadly applicable guidelines (such as infrastructure that supports the usage of software and the collection of metrics about usage), as well as strategies for various types of software and resources. We also highlight outstanding issues in the field regarding how communities measure or evaluate software impact. To gain a deeper understanding of the issues hindering software evaluations, as well as to determine what appears to be helpful, we performed a survey of participants involved with scientific software projects for the Informatics Technology for Cancer Research (ITCR) program funded by the National Cancer Institute (NCI). We also investigated software among this scientific community and others to assess how often infrastructure that supports such evaluations is implemented and how this impacts rates of papers describing usage of the software. We find that although developers recognize the utility of analyzing data related to the impact or usage of their software, they struggle to find the time or funding to support such analyses. We also find that infrastructure such as social media presence, more in-depth documentation, the presence of software health metrics, and clear information on how to contact developers seem to be associated with increased usage rates. Our findings can help scientific software developers make the most out of the evaluations of their software so that they can more fully benefit from such assessments.
Published: 2023

41. Open-source Tools for Training Resources - OTTR.

Author: Savonen C, Wright C, Hoffman AM, Muschelli J, Cox K, Tan FJ, and Leek JT
Abstract: Data science and informatics tools are developing at a blistering rate, but their users often lack the educational background or resources to efficiently apply the methods to their research. Training resources and vignettes that accompany these tools often deprecate because their maintenance is not prioritized by funding, giving teams little time to devote to such endeavors. Our group has developed Open-source Tools for Training Resources (OTTR) to offer greater efficiency and flexibility for creating and maintaining these training resources. OTTR empowers creators to customize their work and allows for a simple workflow to publish using multiple platforms. OTTR allows content creators to publish training material to multiple massive online learner communities using familiar rendering mechanics. OTTR allows the incorporation of pedagogical practices like formative and summative assessments in the form of multiple choice questions and fill in the blank problems that are automatically graded. No local installation of any software is required to begin creating content with OTTR. Thus far, 15 training courses have been created with OTTR repository template. By using the OTTR system, the maintenance workload for updating these courses across platforms has been drastically reduced. For more information about OTTR and how to get started, go to ottrproject.org., Competing Interests: Declaration of interest statement The authors declare no competing interests. Individual courses we have created on Coursera and Leanpub do generate course revenue, but we do not obtain revenue for any courses other individuals create using OTTR.
Published: 2023
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42. Metabolic Strategies Shared by Basement Residents of the Lost City Hydrothermal Field.

Author: Brazelton WJ, McGonigle JM, Motamedi S, Pendleton HL, Twing KI, Miller BC, Lowe WJ, Hoffman AM, Prator CA, Chadwick GL, Anderson RE, Thomas E, Butterfield DA, Aquino KA, Früh-Green GL, Schrenk MO, and Lang SQ
Subjects: Archaea genetics, Archaea metabolism, Bacteria genetics, Bacteria metabolism, Formates metabolism, Hydrogen metabolism, Sulfates metabolism, Ecosystem, Hydrothermal Vents microbiology
Abstract: Alkaline fluids venting from chimneys of the Lost City hydrothermal field flow from a potentially vast microbial habitat within the seafloor where energy and organic molecules are released by chemical reactions within rocks uplifted from Earth's mantle. In this study, we investigated hydrothermal fluids venting from Lost City chimneys as windows into subseafloor environments where the products of geochemical reactions, such as molecular hydrogen (H 2 ), formate, and methane, may be the only available sources of energy for biological activity. Our deep sequencing of metagenomes and metatranscriptomes from these hydrothermal fluids revealed a few key species of archaea and bacteria that are likely to play critical roles in the subseafloor microbial ecosystem. We identified a population of Thermodesulfovibrionales (belonging to phylum Nitrospirota ) as a prevalent sulfate-reducing bacterium that may be responsible for much of the consumption of H 2 and sulfate in Lost City fluids. Metagenome-assembled genomes (MAGs) classified as Methanosarcinaceae and Candidatus Bipolaricaulota were also recovered from venting fluids and represent potential methanogenic and acetogenic members of the subseafloor ecosystem. These genomes share novel hydrogenases and formate dehydrogenase-like sequences that may be unique to hydrothermal environments where H 2 and formate are much more abundant than carbon dioxide. The results of this study include multiple examples of metabolic strategies that appear to be advantageous in hydrothermal and subsurface alkaline environments where energy and carbon are provided by geochemical reactions. IMPORTANCE The Lost City hydrothermal field is an iconic example of a microbial ecosystem fueled by energy and carbon from Earth's mantle. Uplift of mantle rocks into the seafloor can trigger a process known as serpentinization that releases molecular hydrogen (H 2 ) and creates unusual environmental conditions where simple organic carbon molecules are more stable than dissolved inorganic carbon. This study provides an initial glimpse into the kinds of microbes that live deep within the seafloor where serpentinization takes place, by sampling hydrothermal fluids exiting from the Lost City chimneys. The metabolic strategies that these microbes appear to be using are also shared by microbes that inhabit other sites of serpentinization, including continental subsurface environments and natural springs. Therefore, the results of this study contribute to a broader, interdisciplinary effort to understand the general principles and mechanisms by which serpentinization-associated processes can support life on Earth and perhaps other worlds.
Published: 2022
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43. Isolated epileptiform activity in children and adolescents: prevalence, relevance, and implications for treatment.

Author: Swatzyna RJ, Arns M, Tarnow JD, Turner RP, Barr E, MacInerney EK, Hoffman AM, and Boutros NN
Subjects: Adolescent, Child, Electroencephalography, Humans, Prevalence, Seizures, Attention Deficit Disorder with Hyperactivity diagnosis
Abstract: In the field of psychiatry diagnoses are primarily based on the report of symptoms from either the patient, parents, or both, and a psychiatrist's observations. A psychiatric diagnosis is currently the most widely used basis for medication selection and the brain is seldom investigated directly as a source of those symptoms. This study addresses the request from the National Institute of Mental Health (NIMH) Research Domain Criteria Project (RDoC) for scientific research into neurological abnormalities that can be linked to psychiatric symptoms for the purpose of predicting medication response. One such neurological abnormality that has been the focus of many studies over the last three decades is isolated epileptiform discharges (IEDs) in children and adolescents without seizures. We conducted a systematic review of the literature to determine prevalence rates of IEDs within diagnostic categories. We then compared the prevalence of IEDs in the selected literature to our IRB-approved data archive. Our study found a consistent high prevalence of IEDs specifically for ADHD (majority > 25%) and ASD (majority > 59%), and consistent low prevalence rates were found for Depression (3%). If children and adolescents have failed multiple medication attempts, and more than one-third of them have IEDs, then an EEG would be justified within the RDoC paradigm., (© 2020. Springer-Verlag GmbH Germany, part of Springer Nature.)
Published: 2022
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44. Effect of intrabronchial administration of autologous adipose-derived mesenchymal stem cells on severe equine asthma.

Author: Adamič N, Prpar Mihevc S, Blagus R, Kramarič P, Krapež U, Majdič G, Viel L, Hoffman AM, Bienzle D, and Vengust M
Subjects: Animals, Bronchoalveolar Lavage Fluid, Horses, Transplantation, Autologous, Asthma therapy, Asthma veterinary, Horse Diseases therapy, Mesenchymal Stem Cells
Abstract: Background: Severe equine asthma (SEA) is a common chronic respiratory disease and a significant health and well-being problem in horses. Current therapeutic strategies improve pulmonary function and clinical signs in some horses, but in the long-term, return to full athletic function appears to be rare. The aim of this study was to assess the safety and the effect of intrabronchial administration of adipose-derived mesenchymal stem cells (AD-MSC) on pulmonary inflammatory and clinical parameters in horses with SEA., Methods: This was a randomized controlled trial. Twenty adult horses diagnosed with SEA were randomly divided into two groups (n = 10), and treated either with a single intrabronchial application of autologous AD-MSC or oral dexamethasone for three weeks. A targeted clinical examination with determination of clinical score, maximal change in pleural pressure during the breathing cycle, and an endoscopic examination of the airways were performed at baseline and three weeks after treatment. Bronchoalveolar lavage fluid was analyzed cytologically, and IL-1β, IL-4, IL-8, IL-17, TNFα and IFNγ mRNA and protein concentrations were measured at baseline and three weeks. The horses were then monitored over one year for recurrence of SEA. A non-inferiority analysis and a linear mixed-effects model were performed to assess differences between treatments., Results: The non-inferiority of AD-MSC treatment was not established. However, AD-MSC administration significantly ameliorated the clinical score (P = 0.01), decreased the expression of IL-17 mRNA (P = 0.05) and IL-1β (P ≤ 0.001), IL-4 (P ≤ 0.001), TNFα (P = 0.02) protein levels, and had a positive long-term effect on SEA-associated clinical signs (P = 0.02)., Conclusions: Intrabronchial administration of AD-MSC had limited short-term anti-inflammatory effects but improved the clinical signs of SEA at one year., (© 2022. The Author(s).)
Published: 2022
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45. Is a drought a drought in grasslands? Productivity responses to different types of drought.

Author: Carroll CJW, Slette IJ, Griffin-Nolan RJ, Baur LE, Hoffman AM, Denton EM, Gray JE, Post AK, Johnston MK, Yu Q, Collins SL, Luo Y, Smith MD, and Knapp AK
Subjects: Ecosystem, Poaceae, Rain, Droughts, Grassland
Abstract: Drought, defined as a marked deficiency of precipitation relative to normal, occurs as periods of below-average precipitation or complete failure of precipitation inputs, and can be limited to a single season or prolonged over multiple years. Grasslands are typically quite sensitive to drought, but there can be substantial variability in the magnitude of loss of ecosystem function. We hypothesized that differences in how drought occurs may contribute to this variability. In four native Great Plains grasslands (three C 4 - and one C 3 -dominated) spanning a ~ 500-mm precipitation gradient, we imposed drought for four consecutive years by (1) reducing each rainfall event by 66% during the growing season (chronic drought) or (2) completely excluding rainfall during a shorter portion of the growing season (intense drought). The drought treatments were similar in magnitude but differed in the following characteristics: event number, event size and length of dry periods. We observed consistent drought-induced reductions (28-37%) in aboveground net primary production (ANPP) only in the C 4 -dominated grasslands. In general, intense drought reduced ANPP more than chronic drought, with little evidence that drought duration altered this pattern. Conversely, belowground net primary production (BNPP) was reduced by drought in all grasslands (32-64%), with BNPP reductions greater in intense vs. chronic drought treatments in the most mesic grassland. We conclude that grassland productivity responses to drought did not strongly differ between these two types of drought, but when differences existed, intense drought consistently reduced function more than chronic drought., (© 2021. Springer-Verlag GmbH Germany, part of Springer Nature.)
Published: 2021
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46. Intravenous administration of allogeneic Wharton jelly-derived mesenchymal stem cells for treatment of dogs with congestive heart failure secondary to myxomatous mitral valve disease.

Author: Yang VK, Meola DM, Davis A, Barton B, and Hoffman AM
Subjects: Administration, Intravenous veterinary, Animals, Dogs, Mitral Valve, Dog Diseases drug therapy, Heart Failure therapy, Heart Failure veterinary, Hematopoietic Stem Cell Transplantation veterinary, Mesenchymal Stem Cells, Pharmaceutical Preparations, Wharton Jelly
Abstract: Objective: To evaluate whether mesenchymal stem cells (MSCs) can be safely administered IV to dogs with congestive heart failure (CHF) secondary to myxomatous mitral valve disease (MMVD) to improve cardiac function and prolong survival time., Animals: 10 client-owned dogs with CHF secondary to MMVD., Procedures: Dogs with an initial episode of CHF secondary to MMVD were enrolled in a double-blind, placebo-controlled clinical trial. Five dogs in the MSC group received allogeneic Wharton jelly-derived MSCs (2 × 10 6 cells/kg, IV), and 5 dogs in the placebo group received a 1% solution of autologous serum (IV) for 3 injections 3 weeks apart. Cell-release criteria included trilineage differentiation, expression of CD44 and CD90 and not CD34 and major histocompatability complex class II, normal karyotype, and absence of contamination by pathogenic microorganisms. Patients were followed for 6 months or until death or euthanasia. Echocardiographic data, ECG findings, serum cardiac biomarker concentrations, CBC, and serum biochemical analysis results were obtained prior to and 4 hours after the first injection and every 3 months after the final injection., Results: Lymphocyte and eosinophil counts decreased significantly 4 hours after injection, and monocytes decreased significantly only in dogs that received an MSC injection. No significant differences were seen in the echocardiographic variables, ECG results, serum cardiac biomarker concentrations, survival time, and time to first diuretic drug dosage escalation between the 2 groups., Conclusions and Clinical Relevance: This study showed that MSCs can be easily collected from canine Wharton jelly as an allogeneic source of MSCs and can be safely delivered IV to dogs with CHF secondary to MMVD.
Published: 2021
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47. Associations of Self-Reported Oral Health Quality of Life with Actual Oral Health Status in Children.

Author: Scott JM, Gadbury-Amyot CC, Hoffman AM, and Simmer-Beck ML
Subjects: Child, Humans, Oral Health, Retrospective Studies, Self Report, Dental Caries epidemiology, Quality of Life
Abstract: Purpose: Quality of life is considered a component of patient centered care. The purpose of this study was to examine the relationship between self-reported oral health related quality of life (OHRQoL) and the actual oral health status of children. Methods: This retrospective cohort study consisted of pediatric dental chart reviews from three clinics. Demographic and dental visit data along with the child's OHRQoL utilizing the Pediatric Oral health-related Quality of Life (POQL) instrument, were collected. Associations with untreated decay, treated decay, or POQL score were tested, using Chi-square, Fisher's exact test, 2-sample t-tests, or ANOVA. Linear regression was used to evaluate the effect of statistical confounders in the relationship between untreated decay and POQL scores. Significance level was set to 0.05. Results: Two hundred ninety-seven out of 336 children had both POQL and caries data. White children and children with untreated decay had significantly more negative POQL scores. Children rating their oral health as "excellent" or "very good" and children with sealants on molars had significantly more positive POQLs. Associations between POQL scores were significant with untreated decay, but not sealants, when considering both variables in the same model. After adjusting for having sealants, POQL scores were on average 7.5 points higher (more negative) in children with untreated decay, than in children without decay (p< 0.001). Conclusions: Collecting OHRQoL data allows oral health providers to easily incorporate patient perceptions in their assessment and care and would ensure that all oral health needs of the patients are being met. This is important for children, who may have difficulty expressing their concerns, particularly in clinical environments., (Copyright © 2021 The American Dental Hygienists’ Association.)
Published: 2021

48. Quantitative Proteomics Links the LRRC59 Interactome to mRNA Translation on the ER Membrane.

Author: Hannigan MM, Hoffman AM, Thompson JW, Zheng T, and Nicchitta CV
Subjects: Cell Line, Tumor, Computational Biology, Cytosol metabolism, Gene Ontology, Gene Silencing, Humans, Mass Spectrometry, Membrane Proteins genetics, Oxidation-Reduction, Proteasome Endopeptidase Complex genetics, Proteasome Endopeptidase Complex metabolism, Protein Interaction Maps, Proteomics, RNA, Small Interfering, Recombinant Proteins, SEC Translocation Channels genetics, SEC Translocation Channels metabolism, Endoplasmic Reticulum metabolism, Membrane Proteins metabolism, Membrane Transport Proteins metabolism, Protein Biosynthesis, Proteome metabolism, Ribosomes metabolism
Abstract: Protein synthesis on the endoplasmic reticulum (ER) requires the dynamic coordination of numerous cellular components. Together, resident ER membrane proteins, cytoplasmic translation factors, and both integral membrane and cytosolic RNA-binding proteins operate in concert with membrane-associated ribosomes to facilitate ER-localized translation. Little is known, however, regarding the spatial organization of ER-localized translation. This question is of growing significance as it is now known that ER-bound ribosomes contribute to secretory, integral membrane, and cytosolic protein synthesis alike. To explore this question, we utilized quantitative proximity proteomics to identify neighboring protein networks for the candidate ribosome interactors SEC61β (subunit of the protein translocase), RPN1 (oligosaccharyltransferase subunit), SEC62 (translocation integral membrane protein), and LRRC59 (ribosome binding integral membrane protein). Biotin labeling time course studies of the four BioID reporters revealed distinct labeling patterns that intensified but only modestly diversified as a function of labeling time, suggesting that the ER membrane is organized into discrete protein interaction domains. Whereas SEC61β and RPN1 reporters identified translocon-associated networks, SEC62 and LRRC59 reporters revealed divergent protein interactomes. Notably, the SEC62 interactome is enriched in redox-linked proteins and ER luminal chaperones, with the latter likely representing proximity to an ER luminal chaperone reflux pathway. In contrast, the LRRC59 interactome is highly enriched in SRP pathway components, translation factors, and ER-localized RNA-binding proteins, uncovering a functional link between LRRC59 and mRNA translation regulation. Importantly, analysis of the LRRC59 interactome by native immunoprecipitation identified similar protein and functional enrichments. Moreover, [ 35 S]-methionine incorporation assays revealed that siRNA silencing of LRRC59 expression reduced steady state translation levels on the ER by ca. 50%, and also impacted steady state translation levels in the cytosol compartment. Collectively, these data reveal a functional domain organization for the ER and identify a key role for LRRC59 in the organization and regulation of local translation., Competing Interests: Conflict of interest—The authors declare that they have no conflicts of interest with the contents of this article., (© 2020 Hannigan et al.)
Published: 2020
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49. Resolving the Dust Bowl paradox of grassland responses to extreme drought.

Author: Knapp AK, Chen A, Griffin-Nolan RJ, Baur LE, Carroll CJW, Gray JE, Hoffman AM, Li X, Post AK, Slette IJ, Collins SL, Luo Y, and Smith MD
Subjects: Carbon metabolism, Climate Change, History, 20th Century, Rain, Seasons, Soil, Stress, Physiological, Temperature, United States, Water, Droughts history, Grassland, Poaceae physiology
Abstract: During the 1930s Dust Bowl drought in the central United States, species with the C 3 photosynthetic pathway expanded throughout C 4 -dominated grasslands. This widespread increase in C 3 grasses during a decade of low rainfall and high temperatures is inconsistent with well-known traits of C 3 vs. C 4 pathways. Indeed, water use efficiency is generally lower, and photosynthesis is more sensitive to high temperatures in C 3 than C 4 species, consistent with the predominant distribution of C 3 grasslands in cooler environments and at higher latitudes globally. We experimentally imposed extreme drought for 4 y in mixed C 3 /C 4 grasslands in Kansas and Wyoming and, similar to Dust Bowl observations, also documented three- to fivefold increases in C 3 /C 4 biomass ratios. To explain these paradoxical responses, we first analyzed long-term climate records to show that under nominal conditions in the central United States, C 4 grasses dominate where precipitation and air temperature are strongly related (warmest months are wettest months). In contrast, C 3 grasses flourish where precipitation inputs are less strongly coupled to warm temperatures. We then show that during extreme drought years, precipitation-temperature relationships weaken, and the proportion of precipitation falling during cooler months increases. This shift in precipitation seasonality provides a mechanism for C 3 grasses to respond positively to multiyear drought, resolving the Dust Bowl paradox. Grasslands are globally important biomes and increasingly vulnerable to direct effects of climate extremes. Our findings highlight how extreme drought can indirectly alter precipitation seasonality and shift ecosystem phenology, affecting function in ways not predictable from key traits of C 3 and C 4 species., Competing Interests: The authors declare no competing interest.
Published: 2020
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50. International Society for Extracellular Vesicles and International Society for Cell and Gene Therapy statement on extracellular vesicles from mesenchymal stromal cells and other cells: considerations for potential therapeutic agents to suppress coronavirus disease-19.

Author: Börger V, Weiss DJ, Anderson JD, Borràs FE, Bussolati B, Carter DRF, Dominici M, Falcón-Pérez JM, Gimona M, Hill AF, Hoffman AM, de Kleijn D, Levine BL, Lim R, Lötvall J, Mitsialis SA, Monguió-Tortajada M, Muraca M, Nieuwland R, Nowocin A, O'Driscoll L, Ortiz LA, Phinney DG, Reischl I, Rohde E, Sanzenbacher R, Théry C, Toh WS, Witwer KW, Lim SK, and Giebel B
Subjects: Coronavirus Infections drug therapy, Coronavirus Infections immunology, Exosomes transplantation, Humans, Societies, Scientific, COVID-19 Drug Treatment, Extracellular Vesicles transplantation, Mesenchymal Stem Cells cytology
Abstract: Statement: The International Society for Cellular and Gene Therapies (ISCT) and the International Society for Extracellular Vesicles (ISEV) recognize the potential of extracellular vesicles (EVs, including exosomes) from mesenchymal stromal cells (MSCs) and possibly other cell sources as treatments for COVID-19. Research and trials in this area are encouraged. However, ISEV and ISCT do not currently endorse the use of EVs or exosomes for any purpose in COVID-19, including but not limited to reducing cytokine storm, exerting regenerative effects or delivering drugs, pending the generation of appropriate manufacturing and quality control provisions, pre-clinical safety and efficacy data, rational clinical trial design and proper regulatory oversight., (Copyright © 2020 International Society for Cell and Gene Therapy. All rights reserved.)
Published: 2020
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