Two-Pomeranchukon Cut and Its Relation to Diffractive Inclusive Processes

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Abstract
Within the framework of the Gribov Reggeon calculus the discontinuity of the two-Pomeranchukon cut is related to the Pomeranchukon-particle amplitude measured in diffractive inclusive processes. Assuming that the triple-Pomeranchukon vertex vanishes for zero-mass legs, we show how this relationship continues to be valid when the Pomeranchukon-particle amplitude contains the exchange of Pomeranchukon poles or cuts. In particular, we show that the Gribov-Migdal bound is not valid in general. An estimate of the magnitude of the two-Pomeranchukon cut is given.