Event structure and double helicity asymmetry in jet production from polarized p plus p collisions at root s=200 GeV

Autoria(s): ADARE, A.; AFANASIEV, S.; AIDALA, C.; AJITANAND, N. N.; AKIBA, Y.; AL-BATAINEH, H.; ALEXANDER, J.; AOKI, K.; APHECETCHE, L.; ARMENDARIZ, R.; ARONSON, S. H.; ASAI, J.; ATOMSSA, E. T.; AVERBECK, R.; AWES, T. C.; AZMOUN, B.; BABINTSEV, V.; BAKSAY, G.; BAKSAY, L.; BALDISSERI, A.; BARISH, K. N.; BARNES, P. D.; BASSALLECK, B.; BATHE, S.; BATSOULI, S.; BAUBLIS, V.; BAZILEVSKY, A.; BELIKOV, S.; BENNETT, R.; BERDNIKOV, Y.; BICKLEY, A. A.; BOISSEVAIN, J. G.; BOREL, H.; BOYLE, K.; BROOKS, M. L.; BUESCHING, H.; BUMAZHNOV, V.; BUNCE, G.; BUTSYK, S.; CAMPBELL, S.; CHANG, B. S.; CHARVET, J-L.; CHERNICHENKO, S.; CHI, C. Y.; CHIBA, J.; CHIU, M.; CHOI, I. J.; CHUJO, T.; CHUNG, P.; CHURYN, A.; CIANCIOLO, V.; CLEVEN, C. R.; COLE, B. A.; COMETS, M. P.; CONSTANTIN, P.; CSANAD, M.; CSOERGO, T.; DAHMS, T.; DAS, K.; DAVID, G.; DEATON, M. B.; DEHMELT, K.; DELAGRANGE, H.; DENISOV, A.; D'ENTERRIA, D.; DESHPANDE, A.; DESMOND, E. J.; Dietzsch, Olacio; DION, A.; Donadelli, Marisílvia; DRAPIER, O.; DREES, A.; DUBEY, A. K.; DURUM, A.; DZHORDZHADZE, V.; EFREMENKO, Y. V.; EGDEMIR, J.; ELLINGHAUS, F.; EMAM, W. S.; ENOKIZONO, A.; EN'YO, H.; ESUMI, S.; EYSER, K. O.; FIELDS, D. E.; FINGER, M.; FINGER JR., M.; FLEURET, F.; FOKIN, S. L.; FRAENKEL, Z.; FRANTZ, J. E.; FRANZ, A.; FRAWLEY, A. D.; FUJIWARA, K.; FUKAO, Y.; FUSAYASU, T.; GADRAT, S.; GARISHVILI, I.; GLENN, A.; GONG, H.; GONIN, M.; GOSSET, J.; GOTO, Y.; CASSAGNAC, R. Granier de; GRAU, N.; GREENE, S. V.; PERDEKAMP, M. Grosse; GUNJI, T.; GUSTAFSSON, H-A; HACHIYA, T.; HENNI, A. Hadj; HAEGEMANN, C.; HAGGERTY, J. S.; HAMAGAKI, H.; HAN, R.; HARADA, H.; HARTOUNI, E. P.; HARUNA, K.; HASLUM, E.; HAYANO, R.; HE, X.; HEFFNER, M.; HEMMICK, T. K.; HESTER, T.; HIEJIMA, H.; HILL, J. C.; HOBBS, R.; HOHLMANN, M.; HOLZMANN, W.; HOMMA, K.; HONG, B.; HORAGUCHI, T.; HORNBACK, D.; ICHIHARA, T.; IINUMA, H.; IMAI, K.; INABA, M.; INOUE, Y.; ISENHOWER, D.; ISENHOWER, L.; ISHIHARA, M.; ISOBE, T.; ISSAH, M.; ISUPOV, A.; JACAK, B. V.; JIA, J.; JIN, J.; JINNOUCHI, O.; JOHNSON, B. M.; JOO, K. S.; JOUAN, D.; KAJIHARA, F.; KAMETANI, S.; KAMIHARA, N.; KAMIN, J.; KANETA, M.; KANG, J. H.; KANOU, H.; KAWALL, D.; KAZANTSEV, A. V.; KHANZADEEV, A.; KIKUCHI, J.; KIM, D. H.; KIM, D. J.; KIM, E.; KINNEY, E.; KISS, A.; KISTENEV, E.; KIYOMICHI, A.; KLAY, J.; KLEIN-BOESING, C.; KOCHENDA, L.; KOCHETKOV, V.; KOMKOV, B.; KONNO, M.; KOTCHETKOV, D.; KOZLOV, A.; KRAL, A.; KRAVITZ, A.; KUBART, J.; KUNDE, G. J.; KURIHARA, N.; KURITA, K.; KWEON, M. J.; KWON, Y.; KYLE, G. S.; LACEY, R.; LAI, Y. S.; LAJOIE, J. G.; LEBEDEV, A.; LEE, D. M.; LEE, M. K.; LEE, T.; LEITCH, M. J.; Leite, Marco Aurelio Lisboa; Lenzi, Bruno Rodrigues; LI, X.; LISKA, T.; LITVINENKO, A.; LIU, M. X.; LOVE, B.; LYNCH, D.; MAGUIRE, C. F.; MAKDISI, Y. I.; MALAKHOV, A.; MALIK, M. D.; MANKO, V. I.; MAO, Y.; MASEK, L.; MASUI, H.; MATATHIAS, F.; MCCUMBER, M.; MCGAUGHEY, P. L.; MIAKE, Y.; MIKES, P.; MIKI, K.; MILLER, T. E.; MILOV, A.; MIODUSZEWSKI, S.; MISHRA, M.; MITCHELL, J. T.; MITROVSKI, M.; MORREALE, A.; MORRISON, D. P.; MOUKHANOVA, T. V.; MUKHOPADHYAY, D.; MURATA, J.; NAGAMIYA, S.; NAGATA, Y.; NAGLE, J. L.; NAGLIS, M.; NAKAGAWA, I.; NAKAMIYA, Y.; NAKAMURA, T.; NAKANO, K.; NEWBY, J.; NGUYEN, M.; NORMAN, B. E.; NOUICER, R.; NYANIN, A. S.; O'BRIEN, E.; ODA, S. X.; OGILVIE, C. A.; OHNISHI, H.; OKA, M.; OKADA, K.; OMIWADE, O. O.; OSKARSSON, A.; OUCHIDA, M.; OZAWA, K.; PAK, R.; PAL, D.; PALOUNEK, A. P. T.; PANTUEV, V.; PAPAVASSILIOU, V.; PARK, J.; PARK, W. J.; PATE, S. F.; PEI, H.; PENG, J-C.; PEREIRA, H.; PERESEDOV, V.; PERESSOUNKO, D. Yu.; PINKENBURG, C.; PURSCHKE, M. L.; PURWAR, A. K.; QU, H.; RAK, J.; RAKOTOZAFINDRABE, A.; RAVINOVICH, I.; READ, K. F.; REMBECZKI, S.; REUTER, M.; REYGERS, K.; RIABOV, V.; RIABOV, Y.; ROCHE, G.; ROMANA, A.; ROSATI, M.; ROSENDAHL, S. S. E.; ROSNET, P.; RUKOYATKIN, P.; RYKOV, V. L.; SAHLMUELLER, B.; SAITO, N.; SAKAGUCHI, T.; SAKAI, S.; SAKATA, H.; SAMSONOV, V.; SATO, S.; SAWADA, S.; SEELE, J.; SEIDL, R.; SEMENOV, V.; SETO, R.; SHARMA, D.; SHEIN, I.; SHEVEL, A.; SHIBATA, T-A.; SHIGAKI, K.; SHIMOMURA, M.; SHOJI, K.; SICKLES, A.; Silva, Cesar Luiz da; SILVERMYR, D.; SILVESTRE, C.; SIM, K. S.; SINGH, C. P.; SINGH, V.; SKUTNIK, S.; SLUNECKA, M.; SOLDATOV, A.; SOLTZ, R. A.; SONDHEIM, W. E.; SORENSEN, S. P.; SOURIKOVA, I. V.; STALEY, F.; STANKUS, P. W.; STENLUND, E.; STEPANOV, M.; STER, A.; STOLL, S. P.; SUGITATE, T.; SUIRE, C.; SZIKLAI, J.; TABARU, T.; TAKAGI, S.; Takagui, Emi Marcia; TAKETANI, A.; TANAKA, Y.; TANIDA, K.; TANNENBAUM, M. J.; TARANENKO, A.; TARJAN, P.; THOMAS, T. L.; TOGAWA, M.; TOIA, A.; TOJO, J.; TOMASEK, L.; TORII, H.; TOWELL, R. S.; TRAM, V-N.; TSERRUYA, I.; TSUCHIMOTO, Y.; VALE, C.; VALLE, H.; HECKE, H. W. van; VELKOVSKA, J.; VERTESI, R.; VINOGRADOV, A. A.; VIRIUS, M.; VRBA, V.; VZNUZDAEV, E.; WAGNER, M.; WALKER, D.; WANG, X. R.; WATANABE, Y.; WESSELS, J.; WHITE, S. N.; WINTER, D.; WOODY, C. L.; WYSOCKI, M.; XIE, W.; YAMAGUCHI, Y. L.; YANOVICH, A.; YASIN, Z.; YING, J.; YOKKAICHI, S.; YOUNG, G. R.; YOUNUS, I.; YUSHMANOV, I. E.; ZAJC, W. A.; ZAUDTKE, O.; ZHANG, C.; ZHOU, S.; ZIMANYI, J.; ZOLIN, L.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO
Data(s)

18/04/2012

18/04/2012

2011
Resumo

We report on the event structure and double helicity asymmetry (A(LL)) of jet production in longitudinally polarized p + p collisions at root s = 200 GeV. Photons and charged particles were measured by the PHENIX experiment at midrapidity vertical bar eta vertical bar < 0.35 with the requirement of a high-momentum (> 2 GeV/c) photon in the event. Event structure, such as multiplicity, p(T) density and thrust in the PHENIX acceptance, were measured and compared with the results from the PYTHIA event generator and the GEANT detector simulation. The shape of jets and the underlying event were well reproduced at this collision energy. For the measurement of jet A(LL), photons and charged particles were clustered with a seed-cone algorithm to obtain the cluster pT sum (p(T)(reco)). The effect of detector response and the underlying events on p(T)(reco) was evaluated with the simulation. The production rate of reconstructed jets is satisfactorily reproduced with the next-to-leading-order and perturbative quantum chromodynamics jet production cross section. For 4< p(T)(reco) < 12 GeV/c with an average beam polarization of < P > = 49% we measured Lambda(LL) = -0.0014 +/- 0.0037(stat) at the lowest p(T)(reco) bin (4-5 GeV= c) and -0.0181 +/- 0.0282(stat) at the highest p(T)(reco) bin (10-12 GeV= c) with a beam polarization scale error of 9.4% and a pT scale error of 10%. Jets in the measured p(T)(reco) range arise primarily from hard-scattered gluons with momentum fraction 0: 02 < x < 0: 3 according to PYTHIA. The measured A(LL) is compared with predictions that assume various Delta G(x) distributions based on the Gluck-Reya-Stratmann-Vogelsang parameterization. The present result imposes the limit -a.1 < integral(0.3)(0.02) dx Delta G(x, mu(2) = GeV2) < 0.4 at 95% confidence level or integral(0.3)(0.002) dx Delta G(x, mu(2) = 1 GeV2) < 0.5 at 99% confidence level.

Office of Nuclear Physics in the Office of Science of the Department of Energy (DOE)

National Science Foundation (NSF)

Abilene Christian University Research Council

Research Foundation of SUNY

Dean of the College of Arts and Sciences, Vanderbilt University (U.S.A)

Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan

JSPS - Japan Society for the Promotion of Science (Japan)

Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) and Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) (Brazil)

NSFC Natural Science Foundation of China (People's Republic of China)

MSMT Ministry of Education, Youth and Sports (Czech Republic)

CNRS Centre National de la Recherche Scientifique, CEA Commissariat a l'Energie Atomique, and Institut National de Physique Nucleaire et de Physique des Particules (France)

BMBF - Bundesministerium fur Bildung und Forschung, Germany

(DAAD) Deutscher Akademischer Austausch Dienst, Germany

Alexander von Humboldt Stiftung (Germany)

OTKA Hungarian National Science Fund

OTKA (Hungary)

(DAE) Department of Atomic Energy, India

ISF - Israel Science Foundation (Israel)

National Research Foundation (NRF), Korea

WCU, Ministry Education Science and Technology (MEST), Korea

MES Ministry of Education and Science, Russia Academy of Sciences, Federal Agency of Atomic Energy (Russia)

VR (Sweden)

Wallenberg Foundation (Sweden)

CRDF U.S. Civilian Research and Development Foundation for the Independent States of the Former Soviet Union

US-Hungarian NSF-OTKA-MTA

(BSF) US-Israel Binational Science Foundation
Identificador

PHYSICAL REVIEW D, v.84, n.1, 2011

1550-7998

http://producao.usp.br/handle/BDPI/16109

10.1103/PhysRevD.84.012006

http://dx.doi.org/10.1103/PhysRevD.84.012006
Idioma(s)

eng
Publicador

AMER PHYSICAL SOC
Relação

Physical Review D
Direitos

restrictedAccess

Copyright AMER PHYSICAL SOC
Palavras-Chave #SPIN ASYMMETRY #SCATTERING #PROTON #QUARK #Astronomy & Astrophysics #Physics, Particles & Fields
Tipo

article

original article

publishedVersion
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