Nucleon Tensor Charge from Collins Azimuthal Asymmetry Measurements

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WG6 Spin Physics


Alexei Prokudin (Jefferson Lab)


We investigate the nucleon tensor charge from current experiments by a combined analysis of the Collins asymmetries in two hadron production in $e^+e^-$ annihilations and single inclusive hadron production in deep inelastic scattering processes. The transverse momentum dependent evolution is taken into account, for the first time, in the global fit of the Collins fragmentation functions and the quark transversity distributions at the approximate next-to-leading logarithmic order. We obtain the nucleon tensor charge contribution from up and down quarks as: $\delta u=+0.30^{+0.12}_{-0.11}$ and $\delta d=-0.20_{-0.13}^{+0.35}$ at 90\% of confidence level for momentum fraction $0.0065 \le x_B \le 0.35$ and $Q^2=$ 10 GeV$^2$.

Primary author

Alexei Prokudin (Jefferson Lab)


Feng Yuan (LBNL) Dr Zhongbo Kang (Los Alamos National Laboratory) peng sun (LBNL)

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