Publications [#246020] of Haiyan Gao

Papers Published
  1. Ackerstaff, K; Airapetian, A; Akopov, N; Akushevich, I; Amarian, M; Ashenauer, EC; Avakian, H; Avakian, R; Avetissian, A; Bains, B; Baumgarten, C; Beckmann, M; Belostotski, S; Belz, JE; Benisch, T; Bernreuther, S; Bianchi, N; Blouw, J; Böttcher, H; Borissov, A; Brack, J; Brauksiepe, S; Braun, B; Bray, B; Brons, S; Brückner, W; Brüll, A; Bruins, EEW; Bulten, HJ; Cadman, RV; Capitani, GP; Carter, P; Chumney, P; Cisbani, E; Court, GR; Dalpiaz, PF; De Sanctis, E; De Schepper, D; Devitsin, E et al., Flavor Asymmetry of the Light Quark Sea from Semi-inclusive Deep-Inelastic Scattering, Physical Review Letters, vol. 81 no. 25 (December, 1998), pp. 5519-5523 [doi] .

    The flavor asymmetry of the light quark sea of the nucleon is determined in the kinematic range 0.02 < x < 0.3 and 1 < Q2 < 10 GeV2 for the first time from semi-inclusive deep-inelastic scattering. The quantity [d̄(x) -ū(x)]/[u(x) - d(x)] is derived from a relationship between the yields of positive and negative pions from unpolarized hydrogen and deuterium targets. The flavor asymmetry d̄ - ū is found to he nonzero and x dependent, showing an excess of d̄ over ū quarks in the proton.