Double transverse-spin asymmetries in Drell–Yan processes with antiprotons

Barone, Vincenzo; Cafarella, Alessandro; Corianò, Claudio; Guzzi, Marco; Ratcliffe, Philip G.

doi:10.1016/j.physletb.2006.07.012

Cited by 18 publications

(55 citation statements)

References 36 publications

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“…(25) also changes sign. This feature contrasts with other results in the literature [27,28,74,75]. Moreover, we also see a monotonically decreasing trend in x F (and also in y), but our asymmetry is as large as 10% in modulus at most.…”

Section: B the Ssa In Sidiscontrasting

confidence: 99%

Weighted azimuthal asymmetries in a diquark spectator model

et al. 2010

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We analytically calculate weighted azimuthal asymmetries in semi-inclusive lepton-nucleon deepinelastic scattering and Drell-Yan processes, using transverse-momentum-dependent partonic densities obtained in a diquark spectator model. We compare the asymmetries with available preliminary experimental data, in particular for the Collins and the Sivers effect. We make predictions for other cases of interest in running and planned experiments.

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Section: B the Ssa In Sidiscontrasting

confidence: 99%

Weighted azimuthal asymmetries in a diquark spectator model

et al. 2010

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“…It is a remarkable observation that, whenever corrections to leading order DY cross sections were considered, absolute cross sections were found to be considerably altered (typically enhanced), but ratios of observables in DY were found to be only moderately altered. This is in particular the case for collinear double spin asymmetries, for example the double transverse spin asymmetry [111][112][113][114][115][116].…”

Section: Intrinsic Transverse Momenta In Drell-yanmentioning

confidence: 99%

Intrinsic transverse parton momenta in deeply inelastic reactions

2010

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Intrinsic transverse parton momenta pT play an important role in the understanding of azimuthal/spin asymmetries in semi-inclusive deep-inelastic scattering (SIDIS) and the Drell-Yan process (DY). We review and update what is presently known about pT from these processes. In particular, we address the question to which extent data support the popular Gauss model for the pT -distributions. We find that the Gauss model works very well, and observe that the intrinsic transverse momenta in SIDIS and DY are compatible, which is a support for the factorization approach. As a byproduct we recover a simple but practical way of taking into account the energy dependence of pT -distributions.

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“…However, such a measurement is not an easy task because of the technical problems of maintaining the beam polarization through the acceleration. The recently proposed experimental programs at RHIC [7] and at GSI [8] have raised renewed interest in theoretical predictions of the double transverse-spin asymmetry in proton-(anti)proton collisions with dilepton production [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Drell-Yan processes, transversity, and light-cone wave functions

2007

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The unpolarized, helicity and transversity distributions of quarks in the proton are calculated in the overlap representation of light-cone wavefunctions truncated to the lowest order Fock-space components with three valence quarks. The three distributions at the hadronic scale satisfy an interesting relation consistent with the Soffer inequality. Results are derived in a relativistic quark model including evolution up to the next-to-leading order. Predictions for the double transverse-spin asymmetry in Drell-Yan dilepton production initiated by proton-antiproton collisions are presented. Asymmetries of about 20-30% are found in the kinematic conditions of the PAX experiment.

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Double transverse-spin asymmetries in Drell–Yan processes with antiprotons

Cited by 18 publications

References 36 publications

Weighted azimuthal asymmetries in a diquark spectator model

Weighted azimuthal asymmetries in a diquark spectator model

Intrinsic transverse parton momenta in deeply inelastic reactions

Drell-Yan processes, transversity, and light-cone wave functions

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