Unusual features of Drell-Yan diffraction

B. Z. Kopeliovich, I. K. Potashnikova, Ivan Schmidt, and A. V. Tarasov
Phys. Rev. D 74, 114024 – Published 26 December 2006

Abstract

The cross section of the diffractive Drell-Yan (DY) process, ppl¯lXp, where the system l¯lX is separated by a large rapidity gap from the recoil proton, is calculated in the light-cone dipole approach. This process reveals unusual features, quite different from what is known for diffractive deeply inelastic scattering (DIS) and non-Abelian radiation: (i) the diffractive radiation of a heavy dilepton by a quark vanishes in the forward direction; (ii) the diffractive production of a dilepton is controlled by the large hadronic radius; (iii) in contrast with DIS where diffraction is predominantly soft, the diffractive DY reaction is semihard-semisoft; (iv) as a result of the saturated shape of the dipole cross section, the fraction of diffractive DY events steeply falls with energy but rises as a function of the hard scale. These features are common for other Abelian bremsstrahlung processes (higgsstrahlung, Z-strahlung, etc.). Measurements of diffractive DY processes at modern colliders would be a sensitive probe for the shape of the dipole cross section at large separations.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 10 June 2006

DOI:https://doi.org/10.1103/PhysRevD.74.114024

©2006 American Physical Society

Authors & Affiliations

B. Z. Kopeliovich1,2,3, I. K. Potashnikova1,3, Ivan Schmidt1, and A. V. Tarasov2,3

  • 1Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110-V, Valparaíso, Chile
  • 2Institut für Theoretische Physik der Universität, Philosophenweg 19, 69120 Heidelberg, Germany
  • 3Joint Institute for Nuclear Research, Dubna, Russia

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 74, Iss. 11 — 1 December 2006

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×