Transverse momentum dependence of the angular distribution of the Drell-Yan process
| dc.creator | Berger, Edmond L | |
| dc.creator | Qiu, Jian-Wei | |
| dc.creator | Rodriguez-Pedraza, Ricardo A. | |
| dc.date | 2007-08-03 | |
| dc.date | 2007-09-29 | |
| dc.date.accessioned | 2026-07-07T10:57:00Z | |
| dc.date.available | 2026-07-07T10:57:00Z | |
| dc.description | We calculate the transverse momentum Q_{\perp} dependence of the helicity structure functions for the hadroproduction of a massive pair of leptons with pair invariant mass Q. These structure functions determine the angular distribution of the leptons in the pair rest frame. Unphysical behavior in the region Q_{\perp} --> 0 is seen in the results of calculations done at fixed-order in QCD perturbation theory. We use current conservation to demonstrate that the unphysical inverse-power and \ln(Q/Q_{\perp}) logarithmic divergences in three of the four independent helicity structure functions share the same origin as the divergent terms in fixed-order calculations of the angular-integrated cross section. We show that the resummation of these divergences to all orders in the strong coupling strength α_s can be reduced to the solved problem of the resummation of the divergences in the angular-integrated cross section, resulting in well-behaved predictions in the small Q_{\perp} region. Among other results, we show the resummed part of the helicity structure functions preserves the Lam-Tung relation between the longitudinal and double spin-flip structure functions as a function of Q_{\perp} to all orders in α_s. | |
| dc.description | 18 pages, 4 figures; typos corrected, references updated, a few clarifications recommended by the referee. Paper accepted for publication in Physical Review D | |
| dc.identifier | https://arxiv.org/abs/0708.0578 | |
| dc.identifier | http://arxiv.org/abs/0708.0578 | |
| dc.identifier | Phys.Rev.D76:074006,2007 | |
| dc.identifier | doi:10.1103/PhysRevD.76.074006 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/186608 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Transverse momentum dependence of the angular distribution of the Drell-Yan process | |
| dc.type | text |