Measurement of transverse single-spin asymmetries for midrapidity production of neutral pions and charged hadrons in polarized p+p collisions at √s=200 GeV -: art. no. 202001

被引：151

作者：

Adler, SS ^{[1
]}

Afanasiev, S

Aidala, C

Ajitanand, NN

Akiba, Y

Alexander, J

Amirikas, R

Aphecetche, L

Aronson, SH

Averbeck, R

Awes, TC

Azmoun, R

Babintsev, V

Baldisseri, A

Barish, KN

Barnes, PD

Bassalleck, B

Bathe, S

Batsouli, S

Baublis, V

Bauer, F

Bazilevsky, A

Belikov, S

Berdnikov, Y

Bhagavatula, S

Boissevain, JG

Borel, H

Borenstein, S

Brooks, ML

Brown, DS

Bruner, N

Bucher, D

Buesching, H

Bumazhnov, V

Bunce, G

Burward-Hoy, JM

Butsyk, S

Camard, X

Chai, JS

Chand, P

Chang, WC

Chernichenko, S

Chi, CY

Chiba, J

Chiu, M

Choi, IJ

Choi, J

Choudhury, RK

Chujo, T

Cianciolo, V

机构：

[1] Brookhaven Natl Lab, Upton, NY 11973 USA

[2] Abilene Christian Univ, Abilene, TX 79699 USA

[3] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[4] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India

[5] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India

[6] Univ Calif Riverside, Riverside, CA 92521 USA

[7] China Inst Atom Energy, Beijing, Peoples R China

[8] Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan

[9] Columbia Univ, New York, NY 10027 USA

[10] Nevis Labs, Irvington, NY 10533 USA

[11] CEA Saclay, Dapina, F-91191 Gif Sur Yvette, France

[12] Debrecen Univ, H-4010 Debrecen, Hungary

[13] Florida State Univ, Tallahassee, FL 32306 USA

[14] Georgia State Univ, Atlanta, GA 30303 USA

[15] Hiroshima Univ, Higashihiroshima 7398526, Japan

[16] State Res Ctr Russian Federat, IHEP Protvino, Inst High Energy Phys, Protvino 142281, Russia

[17] Iowa State Univ, Ames, IA 50011 USA

[18] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

[19] KAERI, Cyclotron Applicat Lab, Seoul, South Korea

[20] Kangnung Natl Univ, Kangnung 210702, South Korea

[21] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan

[22] Hungarian Acad Sci, KFKI Res Inst Particle & Nucl Phys, MTA KFKI RMKI, H-1525 Budapest, Hungary

[23] Korea Univ, Seoul 136701, South Korea

[24] Russian Res Ctr, IV Kurchatov Atom Energy Inst, Moscow, Russia

[25] Kyoto Univ, Kyoto 6068502, Japan

[26] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France

[27] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[28] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[29] Univ Clermont Ferrand, CNRS, IN2P3, LPC, F-63177 Clermont Ferrand, France

[30] Lund Univ, Dept Phys, SE-22100 Lund, Sweden

[31] Univ Munster, Inst Kernphys, D-48149 Munster, Germany

[32] Myongji Univ, Yongin 449728, Kyonggido, South Korea

[33] Nagasaki Inst Appl Sci, Nagasaki 8510193, Japan

[34] Univ New Mexico, Albuquerque, NM 87131 USA

[35] New Mexico State Univ, Las Cruces, NM 88003 USA

[36] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[37] Univ Paris 11, IPN, CNRS, IN2P3, F-91406 Orsay, France

[38] Petersburg Nucl Phys Inst, Gatchina, Russia

[39] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[40] Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA

[41] St Petersburg State Polytech Univ, St Petersburg, Russia

[42] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

[43] Seoul Natl Univ, Syst Elect Lab, Seoul, South Korea

[44] SUNY Stony Brook, Stony Brook Univ, Dept Chem, Stony Brook, NY 11794 USA

[45] SUNY Stony Brook, Stony Brook Univ, Dept Phys & Astron, Stony Brook, NY 11794 USA

[46] Univ Nantes, CNRS, IN2P3, SUBATECH,Ecole Mines Nantes, F-44307 Nantes, France

[47] Univ Tennessee, Knoxville, TN 37996 USA

[48] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan

[49] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 305, Japan

[50] Vanderbilt Univ, Nashville, TN 37235 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.95.202001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Transverse single-spin asymmetries to probe the transverse-spin structure of the proton have been measured for neutral pions and nonidentified charged hadrons from polarized proton-proton collisions at midrapidity and root s = 200 GeV. The data cover a transverse momentum (pT) range 1.0-5.0 GeV/c for neutral pions and 0.5-5.0 GeV/c for charged hadrons, at a Feynman-x value of approximately zero. The asymmetries seen in this previously unexplored kinematic region are consistent with zero within errors of a few percent. In addition, the inclusive charged hadron cross section at midrapidity from 0.5 < P-T < 7.0 GeV/c is presented and compared to next-to-leading order perturbative QCD ( pQCD) calculations. Successful description of the unpolarized cross section above similar to 2 GeV/c suggests that pQCD is applicable in the interpretation of the asymmetry results in the relevant kinematic range.

引用

页数：6

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