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Non-zero transversity distribution of the pion in a quark-spectator-antiquark model | | Zhun Lu
; Bo-Qiang Ma
; | | Date: |
3 Nov 2004 | | Journal: | Phys.Rev. D70 (2004) 094044 | | Subject: | hep-ph hep-ex nucl-ex nucl-th | | Abstract: | We calculate the non-zero (naïve) T-odd transverse momentum dependent transversity distribution $h_1^{perp}(x,kp^2)$ of the pion in a quark-spectator-antiquark model. The final-state interaction is modelled by the approximation of one gluon exchange between the quark and the antiquark spectator. Using our model result we estimate the unsuppressed cos2$phi$ azimuthal asymmetry in unpolarized $pi^-p$ Drell-Yan process. We find that the transverse momentum dependence of $h_1^{perp}(x,kp^2)$ of the pion is the same as that of $h_1^{perp}(x,kp^2)$ of the proton calculated from the quark-scalar-diquark model, although the $x$ dependencies of them are different from each other. This suggests a connection between cos2$phi$ asymmetries in Drell-Yan processes with different initial hadrons. | | Source: | arXiv, hep-ph/0411043 | | Services: | Forum | Review | PDF | Favorites | |
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