Transverse target spin asymmetries in exclusive ρ0 muoproduction

COMPASS Collaboration

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

Exclusive production of ρ0 mesons was studied at the COMPASS experiment by scattering 160GeV/c muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured as a function of Q2, x B j, or pT2. The sinφS asymmetry is found to be -0.019 ± 0.008(stat) ± 0.003(syst). All other asymmetries are also found to be of small magnitude and consistent with zero within experimental uncertainties. Very recent calculations using a GPD-based model agree well with the present results. The data is interpreted as evidence for the existence of chiral-odd, transverse generalized parton distributions.

Lingua originaleInglese
pagine (da-a)19-26
Numero di pagine8
RivistaPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume731
DOI
Stato di pubblicazionePubblicato - 4 apr 2014
Pubblicato esternamente

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