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

Physics And Astronomy

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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

Funding Information:
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.

Publisher Copyright:
© 2004 The American Physical Society.

ASJC Scopus subject areas

Physics and Astronomy (all)

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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 = "Funding Information: 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. 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",

number = "17",

}

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.

N1 - Funding Information: 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. Publisher Copyright: © 2004 The American Physical Society.

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.

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UR - http://www.scopus.com/inward/citedby.url?scp=2942573615&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.92.171801

DO - 10.1103/PhysRevLett.92.171801

M3 - Article

AN - SCOPUS:2942573615

VL - 92

SP - 171801-1-171801-6

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

ASJC Scopus subject areas

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