Double Transverse-spin Asymmetries in Drell–yan and J/ψ Production from Proton–antiproton Collisions
نویسندگان
چکیده
M. GUZZI, V. BARONE, A. CAFARELLA, C. CORIANÒ and P.G. RATCLIFFE Dip. di Fisica, Università di Lecce, 73100 Lecce, Italy INFN, Sezione di Lecce, 73100 Lecce, Italy Dip. di Fisica e Matematica, Università dell’Insubria, 22100 Como, Italy Di.S.T.A., Università del Piemonte Orientale “A. Avogadro” 15100 Alessandria, Italy INFN, Gruppo Collegato di Alessandria, 15100 Alessandria, Italy Dept. of Physics, University of Crete, 71003 Heraklion, Greece INFN, Sezione di Milano, 20133 Milano, Italy
منابع مشابه
Monte Carlo simulation of events with Drell-Yan lepton pairs from antiproton-proton collisions: the fully polarized case
In this paper, we extend the study of Drell-Yan processes with antiproton beams already presented in a previous work. We consider the fully polarized p̄p → μμX process, because this is the simplest scenario for extracting the transverse spin distribution of quarks, or transversity, which is the missing piece to complete the knowledge of the nucleon spin structure at leading twist. We perform Mon...
متن کاملSummary of Physics Prospects for Polarized Nucleon - Nucleon Scattering at HERA - ~ N ⋆
The physics scope of polarized nucleon–nucleon collisions originating from an internal polarized target in the HERA proton beam is summarized. Based on 240 pb −1 integrated luminosity at 40 GeV c.m. energy, statistical sensitivities are given over a wide (x F , p T)–range for a variety of inclusive and exclusive final states. By measuring single spin asymmetries unique information can be obtain...
متن کاملDrell-Yan double-spin asymmetry ALT in polarized pp̄ collisions: Wandzura-Wilczek contribution
The longitudinal-transverse spin asymmetry ALT in the polarized Drell-Yan process depends on the twist-3 spin-dependent distributions of nucleon. In addition to the contributions expressed as matrix element of the twist-3 operators, these distributions contain the so-called Wandzura-Wilczek part, which is completely determined by a certain integral of the twist-2 spin-dependent parton distribut...
متن کاملDouble–spin Transverse Asymmetries in Drell–yan Processes
We calculate the double–spin transverse asymmetries for the Drell–Yan lepton pair production in pp and p̄p collisions. We assume the transverse and the longitudinal polarization densities to be equal at a very small scale, as it is suggested by confinement model results. Using a global fit for the longitudinal distributions, we find transverse asymmetries of order of 10 at most, in the accessibl...
متن کاملDouble Transverse-Spin Asymmetries for Small-QT Drell-Yan Pair Production in pp̄ Collisions
We discuss the double-spin asymmetries in transversely polarized Drell-Yan process, calculating all-order gluon resummation corrections up to the next-to-leading logarithmic accuracy. This resummation is relevant when the transverse-momentum QT of the produced lepton pair is small, and reproduces the (fixed-order) next-to-leading QCD corrections upon integrating over QT . The resummation correc...
متن کامل