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Statements

Subject Item
n2:RIV%2F46747885%3A24220%2F12%3A%230002486%21RIV14-MSM-24220___
rdf:type
skos:Concept n8:Vysledek
dcterms:description
The COMPASS Collaboration at CERN has measured the transverse spin azimuthal asymmetry of charged hadrons produced in semi-inclusive deep inelastic scattering using a 160 GeV mu(+) beam and a transversely polarised NH3 target. The Collins asymmetry of the proton was extracted in the Bjorken x range 0.003 < x < 0.7. These new precise measurements confirm previous measurements from the COMPASS and HERMES Collaborations, which exhibit a definite effect in the valence quark region. The asymmetries for negative and positive hadrons are similar in magnitude and opposite in sign. They are compatible with model calculations in which the u-quark transversity is opposite in sign and somewhat larger than the d-quark transversity distribution function. The asymmetry is extracted as a function of Bjorken x, the relative hadron energy z and the hadron transverse momentum p(T)(h). The high statistics and quality of the data also allow for more detailed investigations of the dependence on the kinematic variables. These studies confirm the leading-twist nature of the Collins asymmetry. The COMPASS Collaboration at CERN has measured the transverse spin azimuthal asymmetry of charged hadrons produced in semi-inclusive deep inelastic scattering using a 160 GeV mu(+) beam and a transversely polarised NH3 target. The Collins asymmetry of the proton was extracted in the Bjorken x range 0.003 < x < 0.7. These new precise measurements confirm previous measurements from the COMPASS and HERMES Collaborations, which exhibit a definite effect in the valence quark region. The asymmetries for negative and positive hadrons are similar in magnitude and opposite in sign. They are compatible with model calculations in which the u-quark transversity is opposite in sign and somewhat larger than the d-quark transversity distribution function. The asymmetry is extracted as a function of Bjorken x, the relative hadron energy z and the hadron transverse momentum p(T)(h). The high statistics and quality of the data also allow for more detailed investigations of the dependence on the kinematic variables. These studies confirm the leading-twist nature of the Collins asymmetry.
dcterms:title
I - Experimental investigation of transverse spin asymmetries in mu-p SIDIS processes: Collins asymmetries I - Experimental investigation of transverse spin asymmetries in mu-p SIDIS processes: Collins asymmetries
skos:prefLabel
I - Experimental investigation of transverse spin asymmetries in mu-p SIDIS processes: Collins asymmetries I - Experimental investigation of transverse spin asymmetries in mu-p SIDIS processes: Collins asymmetries
skos:notation
RIV/46747885:24220/12:#0002486!RIV14-MSM-24220___
n8:predkladatel
n9:orjk%3A24220
n3:aktivita
n19:I n19:S n19:P
n3:aktivity
I, P(7E12066), P(LA08015), S
n3:cisloPeriodika
4-5
n3:dodaniDat
n12:2014
n3:domaciTvurceVysledku
n17:8586977
n3:druhVysledku
n20:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
140157
n3:idVysledku
RIV/46747885:24220/12:#0002486
n3:jazykVysledku
n6:eng
n3:klicovaSlova
sivers asymnmetries; distributions
n3:klicoveSlovo
n13:distributions n13:sivers%20asymnmetries
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[C4EF51695564]
n3:nazevZdroje
Physics Letters. B
n3:obor
n18:BG
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
220
n3:projekt
n5:LA08015 n5:7E12066
n3:rokUplatneniVysledku
n12:2012
n3:svazekPeriodika
7
n3:tvurceVysledku
Steiger, Lukáš Polák, Jaroslav
n3:wos
000310863300011
s:issn
0370-2693
s:numberOfPages
7
n14:doi
10.1016/j.physletb.2012.09.055
n15:organizacniJednotka
24220