Diffractive Production of Drell-Yan pairs and Heavy Flavors

Abstract

Partonic interpretation of high-energy reactions is known to depend on a reference frame. Particularly, in the rest frame of the target Drell-Yan process looks like freeing of the projectile lepton-antilepton fluctuation, rather than q+qbar -> l+lbar annihilation. The light-cone representation for Drell-Yan reaction is very similar to that in DIS and exposes a substantial contamination of soft interactions, which turn out to be dominant in diffractive production of lepton pairs and in nuclear shadowing. We estimate the fraction of diffractive events in the total Drell-Yan cross section, which scales in M^2, and find a substantial deviation from factorization. An analogous approach is developed for diffractive production of heavy flavors.

Replaced by an extended version for Phys.Lett.B. Based on invited talks at the International Workshop on Diffraction Physics, Rio de Janeiro, February 16-20, 1998, and at DIS'98, Brussels, April 4-8, 1998

References in corpus (1)

• Energy dependence of the survival probability of large rapidity gap

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