Angular distribution of leptons from the decay of massive vector bosons

Abstract

We examine the transverse momentum $Q_{\perp }$ dependence of the helicity structure functions for massive vector bosons of mass $Q$ in hadron reactions. We demonstrate that large logarithmic terms of the form $\ln (Q/Q_{\perp })$ in the helicity structure functions have the same origin as the logarithmic terms in the angular-integrated cross section and that they can be resummed to all orders in the strong coupling ${\alpha }_s$, in the same way as the angular-integrated cross section. As a consequence of current conservation, the resummed part of the helicity structure functions preserves the Lam-Tung relation as a function of $Q_{\perp }$ to all orders in ${\alpha }_s$.

4 pages; a few changes in wording; one reference added. Version in press at Phys. Lett. B

References in corpus (1)

• Transverse momentum dependence of the angular distribution of the Drell-Yan process