Charged-pion cross sections and double-helicity asymmetries in polarized p+p collisions at sroot =200??GeV
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F15%3A00226046" target="_blank" >RIV/68407700:21340/15:00226046 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevD.91.032001" target="_blank" >http://dx.doi.org/10.1103/PhysRevD.91.032001</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.91.032001" target="_blank" >10.1103/PhysRevD.91.032001</a>
Alternative languages
Result language
angličtina
Original language name
Charged-pion cross sections and double-helicity asymmetries in polarized p+p collisions at sroot =200??GeV
Original language description
We present midrapidity charged-pion invariant cross sections, the ratio of the ?- to ?+ cross sections and the charge-separated double-spin asymmetries in polarized p+p collisions at s=200??GeV. While the cross section measurements are consistent withinthe errors of next-to-leading-order (NLO) perturbative quantum chromodynamics predictions (pQCD), the same calculations overestimate the ratio of the charged-pion cross sections. This discrepancy arises from the cancellation of the substantial systematicerrors associated with the NLO-pQCD predictions in the ratio and highlights the constraints these data will place on flavor-dependent pion fragmentation functions. The charge-separated pion asymmetries presented here sample an x range of ~0.03?0.16 andprovide unique information on the sign of the gluon-helicity distribution.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BF - Elementary particle theory and high energy physics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/LG13031" target="_blank" >LG13031: Collaboration of the Czech Republic with CERN</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
1550-7998
e-ISSN
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Volume of the periodical
91
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
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UT code for WoS article
000349856100001
EID of the result in the Scopus database
2-s2.0-84922261375