Publications [#246198] of Haiyan Gao

Papers Published

1. with al, XZE, Precision measurement of the neutron spin asymmetry A1n and spin-flavor decomposition in the valence quark region, Phys. Rev. Lett., vol. 92 no. 1 (2004), pp. 012004, ISSN 0031-9007 [Gateway.cgi], [doi]
   (last updated on 2026/02/08)

   Abstract:
   The neutron spin asymmetry A1ⁿ with high precision at three kinematic in the deep inelastic region at x=0.33, 0.47 and Q ²=2.7, 3.5 and 4.8(GeV/c)², respectively was measured. It was shown that A1ⁿ crosses zero around x=0.47 and becomes significantly positive at x=0.60. The polarized quark distributions, combined with the world proton data were also extracted. The hadron helicity conservation (HHC) mechanism, based on leading-order perturbative quantum chromodynamics (PQCD), where the quark orbital angular momentum (OAM) was assumed to be zero was discussed.