Exclusive omega meson muoproduction on transversely polarised protons
Author
Adolph C.
| Institute of Physics, University of Erlangen Nuremberg
|
Finger Miroslav, prof. Ing. DrSc.
| Faculty of Mathematics and Physics, Charles University in Prague
|
Finger Michael, M.Sc. CSc.
| Faculty of Mathematics and Physics, Charles University in Prague, JINR Dubna
|
Slunečka Miloš, Ing.
| Faculty of Mathematics and Physics, Charles University in Prague, JINR Dubna
|
Smolík Jan, Mgr. Ph.D.
| Faculty of Nuclear Sciences and Physical Engineering CTU
|
Taševský  Marek, Mgr. Ph.D.
| Institute of Physics ASCR
|
et al. 
| different institutions
|
Year
2017
Scientific journal
Nuclear Physics B, 915, 454-475
Web
Abstract
Exclusive production of omega 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 in the range of photon virtuality 1(GeV/c)(2) < Q(2) < 10(GeV/c)(2), Bjorken scaling variable 0.003 < xBj < 0.3 and transverse momentum squared of the omega meson 0.05(GeV/c)(2) < p(T)(2) < 0.5(GeV/c)(2). The measured asymmetries are sensitive to the nucleon helicity-flip Generalised Parton Distributions (GPD) Et hat are related to the orbital angular momentum of quarks, the chiral-odd GPDs H-T that are related to the transversity Parton Distribution Functions, and the sign of the pi omega transition form factor. The results are compared to recent calculations of a GPD-based model. (C) 2016 The Author(s). Published by Elsevier B.V.
Cite article as:
C. Adolph, M. Finger, M. Finger, M. Slunečka, J. Smolík, M. Taševský , . et al., "Exclusive omega meson muoproduction on transversely polarised protons", Nuclear Physics B, 915, 454-475 (2017)