Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ${\rho }^0$ mesons

Abstract

The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure of the nucleon and the related phenomena. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced ${\rho }^0$ mesons. The analysis is based on the data set collected in deep inelastic scattering in $2010$ using a $160\mathrm{GeV}/c$ ${\mu }^{+}$ beam impinging on a transversely polarized ${\mathrm{NH}}_3$ target. The ${\rho }^0$ mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-$x$ variable, the transverse momentum of the pair and the fraction of the energy $z$ carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.

References in corpus (6)

• The COMPASS Experiment at CERN
• Collins and Sivers asymmetries in muonproduction of pions and kaons off transversely polarised proton
• Transverse spin effects in hard semi-inclusive collisions
• Extracting the transversity distributions from single-hadron and dihadron production
• Transverse-momentum dependent functions in semi-inclusive DIS
• Production of vector mesons in the String+${}^3{P}_0$ model of polarized quark fragmentation

Cited by in corpus (3)

• Semi-inclusive deep inelastic scattering off a tensor-polarized spin-1 target
• Production cross sections of light and charmed mesons in $e^{+}{e}^{-}$ annihilation near 10.58 GeV
• The Sivers asymmetry of vector meson production in semi-inclusive deep inelastic scattering