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

University of Birmingham
Goethe University Frankfurt
Panjab University
Variable Energy Cyclotron Centre
Yale University
Brookhaven National Laboratory
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
University of Rajasthan
University of Washington
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
University of California at Berkeley
Institute for High Energy Physics
Institute of Physics Bhubaneswar
Max Planck Institute for Physics (Werner Heisenberg Institute)
Central China Normal University
Texas A&M University
Valparaiso University
Pennsylvania State University
Warsaw University of Technology
Carnegie Mellon University
City University of New York
Universidade de São Paulo
University of Zagreb
Michigan State University

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208 Citas (Scopus)

Resumen

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.

Idioma original	Inglés
Número de artículo	171801
Páginas (desde-hasta)	171801-1-171801-6
Publicación	Physical Review Letters
Volumen	92
N.º	17
DOI	https://doi.org/10.1103/PhysRevLett.92.171801
Estado	Publicada - 30 abr 2004
Publicado de forma externa	Sí

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@article{c0fc4409485f47d8b4018f2e97f0c322,

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 S. Kabana and \{STAR Collaboration\}",

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",

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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 - Kabana, S.

AU - STAR Collaboration

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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