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    Survival probability for high mass diffraction

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    Based on the calculation of survival probabilities, we discuss the problem of extracting the value of G3PG_{3P}, the triple Pomeron 'bare' coupling constant, by comparing the large rapidity gap single high mass diffraction data in proton-proton scattering and J/ΨJ/\Psi photo and DIS production. For p-p scattering the calculation in a three amplitude rescattering eikonal model, predicts the survival probability to be an order of magnitude smaller than for the two amplitude case. The survival probabilities calculation for photo and DIS J/ΨJ/\Psi production is made in a dedicated model. In this process we show that, even though its survival probability is considerably larger than in p-p scattering, its value is below unity and cannot be neglected in the data analysis. We argue that, regardless of the uncertainties in the suggested procedure, its outcome is important both with regards to a realistic estimate of G3PG_{3P}, and the survival probabilities relevant to LHC experiments.Comment: 17 pages, 8 pictures and one tabl
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