A Method of Experimentally Probing Transeverse Momentum Dependent Distributions
نویسندگان
چکیده
We calculate the double spin asymmetry ALL(x, y, z, PhT ) of π0 production with the spectator model and the model based on the factorization ansatz. We also calculate the double spin asymmetry for the integration over the range of (x, y, z) for the setups of the experiments of COMPASS, HERMES, and JLab. We find that the results are characteristically dependent on the model used. Therefore, we suggest that the measurements of the double spin asymmetry provides a method of experimentally probing the transeverse momentum dependent distributions. PACS numbers: 12.39.Ki, 13.60.-r, 13.60.Le, 13.88.+e ar X iv :0 71 0. 26 72 v1 [ he pph ] 1 4 O ct 2 00 7
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تاریخ انتشار 2008