We report the first measurement of the transverse momentum dependence of double-spin asymmetries in semi-inclusive production of pions in deep-inelastic scattering off the longitudinally polarized proton. Data have been obtained using a polarized electron beam of 5.7 GeV with the CLAS detector at the Jefferson Lab (JLab). Modulations of single spin asymmetries over the azimuthal angle between lepton scattering and hadron production planes phi have been measured over a wide kinematic range in Bjorken x and virtual photon squared four-momentum Q(2). A significant nonzero sin2 phi single spin asymmetry was observed for the first time indicating strong spin-orbit correlations for transversely polarized quarks in the longitudinally polarized proton.

Avakian, H., Bosted, P., Burkert, V., Elouadrhiri, L., Adhikari, K., Aghasyan, M., et al. (2010). Measurement of Single- and Double-Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target. PHYSICAL REVIEW LETTERS, 105(26), 262002-1-262002-5 [10.1103/PhysRevLett.105.262002].

Measurement of Single- and Double-Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target

D'ANGELO, ANNALISA;PISANO, SILVIA;
2010-12-22

Abstract

We report the first measurement of the transverse momentum dependence of double-spin asymmetries in semi-inclusive production of pions in deep-inelastic scattering off the longitudinally polarized proton. Data have been obtained using a polarized electron beam of 5.7 GeV with the CLAS detector at the Jefferson Lab (JLab). Modulations of single spin asymmetries over the azimuthal angle between lepton scattering and hadron production planes phi have been measured over a wide kinematic range in Bjorken x and virtual photon squared four-momentum Q(2). A significant nonzero sin2 phi single spin asymmetry was observed for the first time indicating strong spin-orbit correlations for transversely polarized quarks in the longitudinally polarized proton.
22-dic-2010
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
FINAL-STATE INTERACTIONS; TRANSVERSE-MOMENTUM; AZIMUTHAL ASYMMETRIES; DRELL-YAN; SCATTERING; DISTRIBUTIONS; QUARK; DEPENDENCE; CLAS; QCD
Clas Collaboration
http://prl.aps.org/abstract/PRL/v105/i26/e262002
Avakian, H., Bosted, P., Burkert, V., Elouadrhiri, L., Adhikari, K., Aghasyan, M., et al. (2010). Measurement of Single- and Double-Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target. PHYSICAL REVIEW LETTERS, 105(26), 262002-1-262002-5 [10.1103/PhysRevLett.105.262002].
Avakian, H; Bosted, P; Burkert, V; Elouadrhiri, L; Adhikari, K; Aghasyan, M; Amaryan, M; Anghinolfi, M; Baghdasaryan, H; Ball, J; Battaglieri, M; Bedl...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/37912
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