Improved measurement of double helicity asymmetry in inclulsive midrapidity π0 production for polarized p+p collisions at √s=200 GeV

被引：31

作者：

Adler, S. S. ^{[1
]}

Afanasiev, S.

Aidala, C.

Ajitanand, N. N.

Akiba, Y.

Al-Jamel, A.

Alexander, J.

Aoki, K.

Aphecetche, L.

Armendariz, R.

Aronson, S. H.

Averbeck, R.

Awes, T. C.

Azmoun, B.

Babintsev, V.

Baldisseri, A.

Barish, K. N.

Barnes, P. D.

Bassalleck, B.

Bathe, S.

Batsouli, S.

Baublis, V.

Bauer, F.

Bazilevsky, A.

Belikov, S.

Bennett, R.

Berdnikov, Y.

Bjorndal, M. T.

Boissevain, J. G.

Borel, H.

Boyle, K.

Brooks, M. L.

Brown, D. S.

Bruner, N.

Bucher, D.

Buesching, H.

Bumazhnov, V.

Bunce, G.

Burward-Hoy, J. M.

Butsyk, S.

Camard, X.

Campbell, S.

Chai, J. -S.

Chand, P.

Chang, W. C.

Chernichenko, S.

Chi, C. Y.

Chiba, J.

Chiu, M.

Choi, I. J.

机构：

[1] Brookhaven Natl Lab, RIKEN BNL Res Ctr, 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] Univ Colorado, Boulder, CO 80309 USA

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

[11] Nevis Labs, Irvington, NY 10533 USA

[12] CEA Saclay, Dapnia, F-91191 Gif Sur Yvette, France

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

[14] Eotvos Lorand Univ, ELTE, H-1117 Budapest, Hungary

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

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

[17] Hiroshima Univ, Higashihiroshima 7398526, Japan

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

[19] Univ Illinois, Urbana, IL 61801 USA

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

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

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

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

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

[25] Korea Univ, Seoul 136701, South Korea

[26] Kyoto Univ, Kyoto 6068502, Japan

[27] Kurchatov Inst, Russian Res Ctr, Moscow, Russia

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

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

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

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

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

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

[34] Myongji Univ, Yongin 449728, Konggido, South Korea

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

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

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

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

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

[40] Peking Univ, Beijing 100871, Peoples R China

[41] Petersburg Nucl Phys Inst, PNPI, Gatchina 188300, Leningrad Reg, Russia

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

[43] Rikkyo Univ, Dept Phys, Tokyo 1718501, Japan

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

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

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

[47] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

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

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

[50] Univ Tennessee, Knoxville, TN 37996 USA

来源：

PHYSICAL REVIEW D | 2006年 / 73卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.73.091102

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an improved measurement of the double helicity asymmetry for pi(0) production in polarized proton-proton scattering at root s=200 GeV employing the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). The improvements to our previous measurement come from two main factors: Inclusion of a new data set from the 2004 RHIC run with higher beam polarizations than the earlier run and a recalibration of the beam polarization measurements for the earlier run, which resulted in reduced uncertainties and increased beam polarizations. The results are compared to a Next to Leading Order (NLO) perturbative Quantum Chromodynamics (pQCD) calculation with a range of polarized gluon distributions.

引用

页数：5

共 10 条

[1] Double helicity asymmetry in inclusive midrapidity π0 production for polarized p+p collisions at √s=200 GeV -: art. no. 202002 [J].

Adler, SS ;

Afanasiev, S ;

Aidala, C ;

Ajitanand, NN ;

Akiba, Y ;

Al-Jamel, A ;

Alexander, J ;

Aoki, K ;

Aphecetche, L ;

Armendariz, R ;

Aronson, SH ;

Averbeck, R ;

Awes, TC ;

Babintsev, V ;

Baldisseri, A ;

Barish, KN ;

Barnes, PD ;

Bassalleck, B ;

Bathe, S ;

Batsouli, S ;

Baublis, V ;

Bauer, F ;

Bazilevsky, A ;

Belikov, S ;

Bjorndal, MT ;

Boissevain, JG ;

Borel, H ;

Brooks, ML ;

Brown, DS ;

Bruner, N ;

Bucher, D ;

Buesching, H ;

Bumazhnov, V ;

Bunce, G ;

Burward-Hoy, JM ;

Butsyk, S ;

Camard, X ;

Chand, P ;

Chang, WC ;

Chernichenko, S ;

Chi, CY ;

Chiba, J ;

Chiu, M ;

Choi, IJ ;

Choudhury, RK ;

Chujo, T ;

Cianciolo, V ;

Cobigo, Y ;

Cole, BA ;

Comets, MP .

PHYSICAL REVIEW LETTERS, 2004, 93 (20) :202002-1

[2] Midrapidity neutral-pion production in proton-proton collisions at √s 200 GeV -: art. no. 241803 [J].

Adler, SS ;

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 ;

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 ;

Cobigo, Y .

PHYSICAL REVIEW LETTERS, 2003, 91 (24)

[3] AN INVESTIGATION OF THE SPIN STRUCTURE OF THE PROTON IN DEEP INELASTIC-SCATTERING OF POLARIZED MUONS ON POLARIZED PROTONS [J].

ASHMAN, J ;

BADELEK, B ;

BAUM, G ;

BEAUFAYS, J ;

BEE, CP ;

BENCHOUK, C ;

BIRD, IG ;

BROWN, SC ;

CAPUTO, MC ;

CHEUNG, HWK ;

CHIMA, JS ;

CIBOROWSKI, J ;

CLIFFT, R ;

COIGNET, G ;

COMBLEY, F ;

COURT, G ;

DAGOSTINI, G ;

DREES, J ;

DUREN, M ;

DYCE, N ;

EDWARDS, AW ;

EDWARDS, M ;

ERNST, T ;

FERRERO, MI ;

FRANCIS, D ;

GABATHULER, E ;

GAMET, R ;

GIBSON, V ;

GILLIES, J ;

GRAFSTROM, P ;

HAMACHER, K ;

HARRACH, DV ;

HAYMAN, PJ ;

HOLT, JR ;

HUGHES, VW ;

JACHOLKOWSKA, A ;

JONES, T ;

KABUSS, EM ;

KORZEN, B ;

KRUNER, U ;

KULLANDER, S ;

LANDGRAF, U ;

LANSKE, D ;

LETTENSTROM, F ;

LINDQVIST, T ;

LOKEN, J ;

MATTHEWS, M ;

MIZUNO, Y ;

MONIG, K ;

MONTANET, F .

NUCLEAR PHYSICS B, 1989, 328 (01) :1-35

[4] A MEASUREMENT OF THE SPIN ASYMMETRY AND DETERMINATION OF THE STRUCTURE-FUNCTION G1 IN DEEP INELASTIC MUON PROTON-SCATTERING [J].

ASHMAN, J ;

BADELEK, B ;

BAUM, G ;

BEAUFAYS, J ;

BEE, CP ;

BENCHOUK, C ;

BIRD, IG ;

BROWN, SC ;

CAPUTO, MC ;

CHEUNG, HWK ;

CHIMA, J ;

CIBOROWSKI, J ;

CLIFFT, RW ;

COIGNET, G ;

COMBLEY, F ;

COURT, G ;

DAGOSTINI, G ;

DREES, J ;

DUREN, M ;

DYCE, N ;

EDWARDS, AW ;

EDWARDS, M ;

ERNST, T ;

FERRERO, MI ;

FRANCIS, D ;

GABATHULER, E ;

GAJEWSKI, J ;

GAMET, R ;

GIBSON, V ;

GILLIES, J ;

GRAFSTROM, P ;

HAMACHER, K ;

VONHARRACH, D ;

HAYMAN, P ;

HOLT, JR ;

HUGHES, VW ;

JACHOLKOWSKA, A ;

JONES, T ;

KABUSS, EM ;

KORZEN, B ;

KRUNER, U ;

KULLANDER, S ;

LANDGRAF, U ;

LANSKE, D ;

LETTENSTROM, F ;

LINDQVIST, T ;

LOKEN, J ;

MATTHEWS, M ;

MIZUNO, Y ;

MONIG, K .

PHYSICS LETTERS B, 1988, 206 (02) :364-370

[5] Models for the polarized parton distributions of the nucleon -: art. no. 094005 [J].

Glück, M ;

Reya, E ;

Stratmann, M ;

Vogelsang, W .

PHYSICAL REVIEW D, 2001, 63 (09)

[6] Spin structure functions [J].

Hughes, EW ;

Voss, R .

ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, 1999, 49 :303-339

[7] Next-to-leading order QCD corrections to high-pT pion production in longitudinally polarized pp collisions -: art. no. 054005 [J].

Jäger, B ;

Schäfer, A ;

Stratmann, M ;

Vogelsang, W .

PHYSICAL REVIEW D, 2003, 67 (05)

[8]

JINNOUCHI O, 2004, RHIC CAD ACCELERATOR, V171

[9]

MACKAY WW, UNPUB P 2003 PART AC, P1697

[10]

WISE T, UNPUB P SPIN 2004 S, P757

← 1 →