Publication
Longitudinal double spin asymmetries in single hadron quasi-real photoproduction at high $p_T$
| dc.contributor.author | COMPASS collaboration (210 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 | 2019-02-04T07:57:17Z | |
| dc.date.available | 2019-02-04T07:57:17Z | |
| dc.date.issued | 2016-02-10 | |
| dc.date.updated | 2019-02-04T07:57:16Z | |
| dc.description.abstract | We measured the longitudinal double spin asymmetries $A_{LL}$ for single hadron muo-production off protons and deuterons at photon virtuality $Q^2$ < 1(GeV/$\it c$)$^2$ for transverse hadron momenta $p_T$ in the range 0.7 GeV/$\it c$ to 4 GeV/$\it c$ . They were determined using COMPASS data taken with a polarised muon beam of 160 GeV/$\it c$ or 200 GeV/$\it c$ impinging on polarised $\mathrm{{}^6LiD}$ or $\mathrm{NH_3}$ targets. The experimental asymmetries are compared to next-to-leading order pQCD calculations, and are sensitive to the gluon polarisation $\Delta G$ inside the nucleon in the range of the nucleon momentum fraction carried by gluons $0.05 < x_g < 0.2$. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B753 (2016) 573-579; DOI 10.1016/j.physletb.2015.12.035 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2015.12.035 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26922 | |
| dc.language.iso | eng | |
| dc.title | Longitudinal double spin asymmetries in single hadron quasi-real photoproduction at high $p_T$ | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |