Transverse target spin asymmetries in exclusive $\rho^0$ muoproduction

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COMPASS has studied exclusive production of 0 mesons using a 160 GeV/ c muon beam and a transversely polarised NH 3 target. Five single-spin and three double-spin azimuthal aymmetries were measured in dependence on Q 2 , x Bj ,or p 2 T . Except the sin S asymmetry, obtained to be − 0.019 ± 0.008(...

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Detalles Bibliográficos
Autores principales: Schmidt, Katharina, Nowak, Wolf-Dieter
Lenguaje:eng
Publicado: 2014
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1051/epjconf/20147302016
http://cds.cern.ch/record/2021512
Descripción
Sumario:COMPASS has studied exclusive production of 0 mesons using a 160 GeV/ c muon beam and a transversely polarised NH 3 target. Five single-spin and three double-spin azimuthal aymmetries were measured in dependence on Q 2 , x Bj ,or p 2 T . Except the sin S asymmetry, obtained to be − 0.019 ± 0.008( stat .) ± 0.003( syst .), all others were found to be consistent with zero within experimental uncertainties. Phenomenological GPD-based model calculations agree well with the data and interpret the result as evidence for the existence of chiral-odd, transverse generalised parton distribution

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