Cross sections and transverse single-spin asymmetries in forward neutral-pion production from proton collisions at √s = 200 GeV

doi:10.1103/PhysRevLett.92.171801

Cross sections and transverse single-spin asymmetries in forward neutral-pion production from proton collisions at √s = 200 GeV

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205 Scopus citations

Abstract

Measurements of the production of forward high-energy π⁰ mesons from transversely polarized proton collisions at √s = 200 GeV are reported. The cross section is generally consistent with next-to-leading order perturbative QCD calculations. The analyzing power is small at x_F below about 0.3, and becomes positive and large at higher x_F, similar to the trend in data at √s ≤ 20 GeV. The analyzing power is in qualitative agreement with perturbative QCD model expectations. This is the first significant spin result seen for particles produced with p_T > 1 GeV=c at a polarized proton collider.

Original language	English
Article number	171801
Pages (from-to)	171801-1-171801-6
Journal	Physical Review Letters
Volume	92
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.92.171801
State	Published - Apr 30 2004

Bibliographical note

Publisher Copyright:
© 2004 The American Physical Society.

Funding

We thank the RHIC Operations Group and RCF at BNL, and the NERSC Center at LBNL for their sup?>port. This work was supported in part by the HENP Divisions of the Office of Science of the U.S. DOE; the U.S. NSF; the BMBF of Germany; IN2P3, RA, RPL, and EMN of France; EPSRC of the United Kingdom; FAPESP of Brazil; the Russian Ministry of Science and Technology; the Ministry of Education and the NNSFC of China; Grant Agency of the Czech Republic, DAE, DST, and CSIR of the Government of India; the Swiss NSF.

Funders	Funder number
EMN
Russian Ministry of Science and Technology
U.S. Department of Energy
Office of Science Programs
UK Medical Research Council, Engineering and Physical Sciences Research Council
Department of Science and Technology, Ministry of Science and Technology, India
Council of Scientific and Industrial Research, India
Government of India, Department of Atomic Energy
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Fundação de Amparo à Pesquisa do Estado de São Paulo
National Natural Science Foundation of China (NSFC)
Grantová Agentura České Republiky
Bundesministerium für Bildung und Forschung	IN2P3
Ministry of Education China
Neurosciences Foundation

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.92.171801

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@article{fac4ae09eff447b89a998f336778581f,

title = "Cross sections and transverse single-spin asymmetries in forward neutral-pion production from proton collisions at √s = 200 GeV",

abstract = "Measurements of the production of forward high-energy π0 mesons from transversely polarized proton collisions at √s = 200 GeV are reported. The cross section is generally consistent with next-to-leading order perturbative QCD calculations. The analyzing power is small at xF below about 0.3, and becomes positive and large at higher xF, similar to the trend in data at √s ≤ 20 GeV. The analyzing power is in qualitative agreement with perturbative QCD model expectations. This is the first significant spin result seen for particles produced with pT > 1 GeV=c at a polarized proton collider.",

author = "J. Adams and C. Adler and Aggarwal, \{M. M.\} and Z. Ahammed and J. Amonett and Anderson, \{B. D.\} and M. Anderson and D. Arkhipkin and Averichev, \{G. S.\} and Badyal, \{S. K.\} and J. Balewski and O. Barannikova and Barnby, \{L. S.\} and J. Baudot and S. Bekele and Belaga, \{V. V.\} and R. Bellwied and J. Berger and Bezverkhny, \{B. I.\} and S. Bhardwaj and P. Bhaskar and Bhati, \{A. K.\} and H. Bichsel and A. Billmeier and Bland, \{L. C.\} and Blyth, \{C. O.\} and Bonner, \{B. E.\} and M. Botje and A. Boucham and A. Brandin and A. Bravar and Cadman, \{R. V.\} and Cai, \{X. Z.\} and H. Caines and \{Calder{\'o}n De La Barca S{\'a}nchez\}, M. and J. Carroll and J. Castillo and M. Castro and D. Cebra and P. Chaloupka and S. Chattopadhyay and Chen, \{H. F.\} and Y. Chen and Chernenko, \{S. P.\} and M. Cherney and A. Chikanian and B. Choi and W. Christie and Coffin, \{J. P.\} and R. Fatemi",

note = "Publisher Copyright: {\textcopyright} 2004 The American Physical Society.",

year = "2004",

month = apr,

day = "30",

doi = "10.1103/PhysRevLett.92.171801",

language = "English",

volume = "92",

pages = "171801--1--171801--6",

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TY - JOUR

T1 - Cross sections and transverse single-spin asymmetries in forward neutral-pion production from proton collisions at √s = 200 GeV

AU - Adams, J.

AU - Adler, C.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Amonett, J.

AU - Anderson, B. D.

AU - Anderson, M.

AU - Arkhipkin, D.

AU - Averichev, G. S.

AU - Badyal, S. K.

AU - Balewski, J.

AU - Barannikova, O.

AU - Barnby, L. S.

AU - Baudot, J.

AU - Bekele, S.

AU - Belaga, V. V.

AU - Bellwied, R.

AU - Berger, J.

AU - Bezverkhny, B. I.

AU - Bhardwaj, S.

AU - Bhaskar, P.

AU - Bhati, A. K.

AU - Bichsel, H.

AU - Billmeier, A.

AU - Bland, L. C.

AU - Blyth, C. O.

AU - Bonner, B. E.

AU - Botje, M.

AU - Boucham, A.

AU - Brandin, A.

AU - Bravar, A.

AU - Cadman, R. V.

AU - Cai, X. Z.

AU - Caines, H.

AU - Calderón De La Barca Sánchez, M.

AU - Carroll, J.

AU - Castillo, J.

AU - Castro, M.

AU - Cebra, D.

AU - Chaloupka, P.

AU - Chattopadhyay, S.

AU - Chen, H. F.

AU - Chen, Y.

AU - Chernenko, S. P.

AU - Cherney, M.

AU - Chikanian, A.

AU - Choi, B.

AU - Christie, W.

AU - Coffin, J. P.

AU - Fatemi, R.

PY - 2004/4/30

Y1 - 2004/4/30

N2 - Measurements of the production of forward high-energy π0 mesons from transversely polarized proton collisions at √s = 200 GeV are reported. The cross section is generally consistent with next-to-leading order perturbative QCD calculations. The analyzing power is small at xF below about 0.3, and becomes positive and large at higher xF, similar to the trend in data at √s ≤ 20 GeV. The analyzing power is in qualitative agreement with perturbative QCD model expectations. This is the first significant spin result seen for particles produced with pT > 1 GeV=c at a polarized proton collider.

AB - Measurements of the production of forward high-energy π0 mesons from transversely polarized proton collisions at √s = 200 GeV are reported. The cross section is generally consistent with next-to-leading order perturbative QCD calculations. The analyzing power is small at xF below about 0.3, and becomes positive and large at higher xF, similar to the trend in data at √s ≤ 20 GeV. The analyzing power is in qualitative agreement with perturbative QCD model expectations. This is the first significant spin result seen for particles produced with pT > 1 GeV=c at a polarized proton collider.

UR - https://www.scopus.com/pages/publications/2942573615

UR - https://www.scopus.com/pages/publications/2942573615#tab=citedBy

U2 - 10.1103/PhysRevLett.92.171801

DO - 10.1103/PhysRevLett.92.171801

M3 - Article

AN - SCOPUS:2942573615

SN - 0031-9007

VL - 92

SP - 171801-1-171801-6

JO - Physical Review Letters

JF - Physical Review Letters

IS - 17

M1 - 171801

ER -

Cross sections and transverse single-spin asymmetries in forward neutral-pion production from proton collisions at √s = 200 GeV

Abstract

Bibliographical note

Funding

ASJC Scopus subject areas

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