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Statements

Subject Item
n2:RIV%2F68407700%3A21340%2F14%3A00218872%21RIV15-MSM-21340___
rdf:type
n18:Vysledek skos:Concept
dcterms:description
Measurements of transverse-single-spin asymmetries in p+p collisions at root s =62.4 and 200 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider are presented. At midrapidity, AN is measured for neutral pion and eta mesons reconstructed from diphoton decay, and, at forward rapidities, neutral pions are measured using both diphotons and electromagnetic clusters. The neutral-pion measurement of AN at midrapidity is consistent with zero with uncertainties a factor of 20 smaller than previous publications, which will lead to improved constraints on the gluon Sivers function. At higher rapidities, where the valence quark distributions are probed, the data exhibit sizable asymmetries. In comparison with previous measurements in this kinematic region, the new data extend the kinematic coverage in root s and pT, and it is found that the asymmetries depend only weakly on root s . The origin of the forward AN is presently not understood quantitatively. The extended reach to higher pT probes the transition between transverse momentum dependent effects at low pT and multiparton dynamics at high pT . Measurements of transverse-single-spin asymmetries in p+p collisions at root s =62.4 and 200 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider are presented. At midrapidity, AN is measured for neutral pion and eta mesons reconstructed from diphoton decay, and, at forward rapidities, neutral pions are measured using both diphotons and electromagnetic clusters. The neutral-pion measurement of AN at midrapidity is consistent with zero with uncertainties a factor of 20 smaller than previous publications, which will lead to improved constraints on the gluon Sivers function. At higher rapidities, where the valence quark distributions are probed, the data exhibit sizable asymmetries. In comparison with previous measurements in this kinematic region, the new data extend the kinematic coverage in root s and pT, and it is found that the asymmetries depend only weakly on root s . The origin of the forward AN is presently not understood quantitatively. The extended reach to higher pT probes the transition between transverse momentum dependent effects at low pT and multiparton dynamics at high pT .
dcterms:title
Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at root s =200 and 62.4 GeV Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at root s =200 and 62.4 GeV
skos:prefLabel
Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at root s =200 and 62.4 GeV Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at root s =200 and 62.4 GeV
skos:notation
RIV/68407700:21340/14:00218872!RIV15-MSM-21340___
n4:aktivita
n14:S n14:P n14:I
n4:aktivity
I, P(LG13031), S
n4:cisloPeriodika
1
n4:dodaniDat
n17:2015
n4:domaciTvurceVysledku
n15:1560727 n15:5586577
n4:druhVysledku
n10:J
n4:duvernostUdaju
n9:S
n4:entitaPredkladatele
n19:predkladatel
n4:idSjednocenehoVysledku
27941
n4:idVysledku
RIV/68407700:21340/14:00218872
n4:jazykVysledku
n16:eng
n4:klicovaSlova
electromagnetic cluster; hadroproduction; quark valence; spin asymmetry; rapidity dependence; transverse momentum dependence; RHIC; Sivers function
n4:klicoveSlovo
n5:electromagnetic%20cluster n5:Sivers%20function n5:RHIC n5:quark%20valence n5:hadroproduction n5:spin%20asymmetry n5:rapidity%20dependence n5:transverse%20momentum%20dependence
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[4ACACB3D0EA3]
n4:nazevZdroje
Physical Review D
n4:obor
n12:BF
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
451
n4:projekt
n11:LG13031
n4:rokUplatneniVysledku
n17:2014
n4:svazekPeriodika
90
n4:tvurceVysledku
Virius, Miroslav Liška, Tomáš Adare, A. Král, A.
n4:wos
000339067000001
s:issn
1550-7998
s:numberOfPages
15
n7:doi
10.1103/PhysRevD.90.012006
n6:organizacniJednotka
21340