Lepton angular distribution of W boson productions

W and Z Boson Productions in Cms at Lhc Startup

We report on potential for measurement of W and Z boson production, as well as the production in association with jets. Of particular interest are jet multiplicity and PT distributions. The 10 to 100 pb −1 datasets expected in the startup year of operation of LHC are likely to already provide information beyond the reach of the Tevatron collider both in jet multiplicity and PT range. We are esp...

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...

Polarization effects in electroweak vector boson productions

The electroweak production processes of vector bosons, e+e− → Zγ, γe → Ze, and γe → Wν are considered simultaneousely and in the Standard model the covariant polarization density matrices of vector bosons for these processes are obtained explicitly from one of the processes, γe → Ze. The effect of the photon polarization as well as the vector meson polarization is considered and some special ca...

Angular correlations of lepton pairs from vector boson and top quark decays in Monte Carlo simulations

We explain how angular correlations in leptonic decays of vector bosons and top quarks can be included in Monte Carlo parton showers, in particular those matched to NLO QCD computations. We consider the production of n pairs of leptons, originating from the decays of n electroweak vector bosons or of n top quarks, in the narrow-width approximation. In the latter case, the information on the n b...

Measurement of the Lepton Charge Asymmetry in W - boson Decays Produced in pp Collisions