Single spin asymmetry for the Drell-Yan process
نویسندگان
چکیده
منابع مشابه
Single transverse-spin asymmetry in Drell-Yan lepton angular distribution
We calculate a single transverse-spin asymmetry for the Drell-Yan lepton-pair’s angular distribution in perturbative QCD. At leading order in the strong coupling constant, the asymmetry is expressed in terms of a twist-3 quark-gluon correlation function T (V ) F (x1, x2). In our calculation, the same result was obtained in both light-cone and covariant gauge in QCD, while keeping explicit elect...
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The angular distribution of lepton pairs produced via the qq annihilation process is studied through O(ai) in perturbative QCD. Asymmetries for single spin experiments are found to be very small -in this channel. This provides an interesting new QCD test in forth+ coming 77 p experiments. The smallness of the result is intimately related to the gauge structure of the theory and to the color coe...
متن کاملSingle spin asymmetries in the Drell - Yan process 1
We discuss single transverse spin asymmetries in the Drell-Yan process originating from so-called gluonic poles in twist-three hadronic matrix elements, as first considered by Qiu and Sterman. Even though time-reversal invariance is not broken, the effects of such poles cannot be distinguished from those of time-reversal odd distribution functions. We show the connection between gluonic poles a...
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The longitudinal-transverse spin asymmetry ALT in the polarized Drell-Yan process depends on twist-3 quark distributions of nucleon. In addition to the contributions associated with the twist-3 operators, these distributions contain the “Wandzura-Wilczek (WW)” part, which is determined by a certain integral of twist-2 distributions. The recently obtained empirical information on the transversit...
متن کاملDouble transverse spin asymmetry in the pp̄ Drell-Yan process from Sivers functions
We show that the transverse double spin asymmetry (DSA) in the Drell-Yan process contributed only from the Sivers functions can be picked out by the weighting function QT M (cos(φ−φS1) cos(φ− φS2) + 3 sin(φ − φS1) sin(φ − φS2)). The asymmetry is proportional to the product of two Sivers functions from each hadron f ⊥(1) 1T × f ⊥(1) 1T . Using two sets of Sivers functions extracted from the semi...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1997
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(96)01404-9