Publication
Exclusive $\omega$ meson muoproduction on transversely polarised protons
| dc.contributor.author | COMPASS collaboration (228 authors) | |
| dc.contributor.author | Bordalo, P. | |
| dc.contributor.author | Franco, C. | |
| dc.contributor.author | Nunes, A.S. | |
| dc.contributor.author | Quaresma, M. | |
| dc.contributor.author | Quintans, C. | |
| dc.contributor.author | Ramos, S. | |
| dc.contributor.author | Silva, L. | |
| dc.contributor.author | Stolarski, M. | |
| dc.date.accessioned | 2019-02-04T10:19:33Z | |
| dc.date.available | 2019-02-04T10:19:33Z | |
| dc.date.issued | 2017-02 | |
| dc.date.updated | 2019-02-04T10:19:33Z | |
| dc.description.abstract | Exclusive production of ω mesons was studied at the COMPASS experiment by scattering 160 GeV/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<Q2<10 (GeV/c)2 , Bjorken scaling variable 0.003<xBj<0.3 and transverse momentum squared of the ω meson 0.05 (GeV/c)2<pT2<0.5 (GeV/c)2 . The measured asymmetries are sensitive to the nucleon helicity-flip Generalised Parton Distributions (GPD) E that are related to the orbital angular momentum of quarks, the chiral-odd GPDs HT that are related to the transversity Parton Distribution Functions, and the sign of the πω transition form factor. The results are compared to recent calculations of a GPD-based model. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Nucl.Phys. B915 (2017) 454-475; DOI 10.1016/j.nuclphysb.2016.12.015 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.nuclphysb.2016.12.015 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/27114 | |
| dc.language.iso | eng | |
| dc.title | Exclusive $\omega$ meson muoproduction on transversely polarised protons | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |