Forward neutral pion production in p+p and d+Au collisions at √SNN=200 GeV

被引：194

作者：

Adams, J. ^{[1
]}

Aggarwal, M. M.

Ahammed, Z.

Amonett, J.

Anderson, B. D.

Arkhipkin, D.

Averichev, G. S.

Badyal, S. K.

Bai, Y.

Balewski, J.

Barannikova, O.

Barnby, L. S.

Baudot, J.

Bekele, S.

Belaga, V. V.

Bellingeri-Laurikainen, A.

Bellwied, R.

Berger, J.

Bezverkhny, B. I.

Bharadwaj, S.

Bhasin, A.

Bhati, A. K.

Bhatia, V. S.

Bichsel, H.

Bielcik, J.

Bielcikova, J.

Billmeier, A.

Bland, L. C.

Blyth, C. O.

Blyth, S-L.

Bonner, B. E.

Botje, M.

Boucham, A.

Bouchet, J.

Brandin, A. V.

Bravar, A.

Bystersky, M.

Cadman, R. V.

Cai, X. Z.

Caines, H.

de la Barca Sanchez, M. Calderon

Catu, O.

Cebra, D.

Chajecki, Z.

Chaloupka, P.

Chattopadhyay, S.

Chen, H. F.

Chen, J. H.

Chen, Y.

Cheng, J.

机构：

[1] Univ Birmingham, Birmingham, W Midlands, England

[2] Argonne Natl Lab, Argonne, IL 60439 USA

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

[4] CALTECH, Pasadena, CA 91125 USA

[5] Univ Calif Berkeley, Berkeley, CA 94720 USA

[6] Univ Calif Davis, Davis, CA 95616 USA

[7] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[8] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[9] Creighton Univ, Omaha, NE 68178 USA

[10] Nucl Phys Inst AS CR, Rez 25068, Czech Republic

[11] Joint Inst Nucl Res Dubna, Lab High Energy, Dubna, Russia

[12] Joint Inst Nucl Res Dubna, Phys Particules Lab, Dubna, Russia

[13] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany

[14] Inst Phys, Bhubaneswar 751005, Orissa, India

[15] Indian Inst Technol, Bombay 400076, Maharashtra, India

[16] Indiana Univ, Bloomington, IN 47408 USA

[17] Inst Rech Subatom, Strasbourg, France

[18] Univ Jammu, Jammu 180001, India

[19] Kent State Univ, Kent, OH 44242 USA

[20] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[21] MIT, Cambridge, MA 02139 USA

[22] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[23] Michigan State Univ, E Lansing, MI 48824 USA

[24] Moscow Engn Phys Inst, Moscow 115409, Russia

[25] CUNY City Coll, New York, NY 10031 USA

[26] NIKHEF, Amsterdam, Netherlands

[27] Univ Utrecht, Amsterdam, Netherlands

[28] Ohio State Univ, Columbus, OH 43210 USA

[29] Panjab Univ, Chandigarh 160014, India

[30] Penn State Univ, University Pk, PA 16802 USA

[31] Inst High Energy Phys, Protvino, Russia

[32] Purdue Univ, W Lafayette, IN 47907 USA

[33] Pusan Natl Univ, Pusan 609735, South Korea

[34] Univ Rajasthan, Jaipur 302004, Rajasthan, India

[35] Rice Univ, Houston, TX 77251 USA

[36] Univ Sao Paulo, Sao Paulo, Brazil

[37] Univ Sci & Technol China, Hefei 230026, Peoples R China

[38] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[39] SUBATECH, Nantes, France

[40] Texas A&M Univ, College Stn, TX 77843 USA

[41] Univ Texas, Austin, TX 78712 USA

[42] Tsinghua Univ, Beijing 100084, Peoples R China

[43] Valparaiso Univ, Valparaiso, IN 46383 USA

[44] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India

[45] Warsaw Univ Technol, Warsaw, Poland

[46] Univ Washington, Seattle, WA 98195 USA

[47] Wayne State Univ, Detroit, MI 48201 USA

[48] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China

[49] Yale Univ, New Haven, CT 06520 USA

[50] Univ Zagreb, HR-10002 Zagreb, Croatia

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.97.152302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of the production of forward pi(0) mesons from p+p and d+Au collisions at root s(NN) = 200 GeV are reported. The p+p yield generally agrees with next-to-leading order perturbative QCD calculations. The d+Au yield per binary collision is suppressed as eta increases, decreasing to similar to 30% of the p+p yield at <eta >=4.00, well below shadowing expectations. Exploratory measurements of azimuthal correlations of the forward pi(0) with charged hadrons at eta approximate to 0 show a recoil peak in p+p that is suppressed in d+Au at low pion energy. These observations are qualitatively consistent with a saturation picture of the low-x gluon structure of heavy nuclei.

引用

页数：6

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