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

STAR Collaboration

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

STAR Collaboration

Physics and Astronomy

University of Birmingham
Goethe University Frankfurt
Panjab University
Variable Energy Cyclotron Centre India
Kent State University
University of California at Davis
Joint Institute for Nuclear Research
University of Jammu
Indiana University Bloomington
Purdue University
Institut de Recherches Subatomiques
Ohio State University
Wayne State University
Yale University
University of Rajasthan
University of Washington
Brookhaven National Laboratory
Rice University
National Institute for Subatomic Physics
SUBATECH
Moscow Engineering Physics Institute
Argonne National Laboratory
Academia Sinica - Shanghai Institute of Nuclear Research
Lawrence Berkeley National Laboratory
Czech Academy of Sciences
University of Science and Technology of China
University of California at Los Angeles
Creighton University
University of Texas at Austin

Research output: Contribution to journal › Article › peer-review

209 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

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10.1103/PhysRevLett.92.171801

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@article{dd8aa2529af24087950fa620001f7dc9,

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 = "\{STAR Collaboration\} and 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 J. Kiryluk",

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",

journal = "Physical Review Letters",

issn = "0031-9007",

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 - STAR Collaboration

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 - Kiryluk, J.

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

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

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