Abstract
We present a `global' description of the wide variety of high energy elastic and diffractive data that are presently available, particularly from the LHC experiments. The model is based on only one pomeron pole, but includes multi-pomeron interactions and, significantly, includes the transverse momentum dependence of intermediate partons as a function of their rapidity, which provides the rapidity dependence of the multi-pomeron vertices. We give predictions for diffractive observables at LHC energies.
Highlights
High-energy diffractive processes caused by pomeron exchange are usually described within the framework of Reggeon Field Theory (RFT) [1]
8 GeV) MX interval is more than twice larger than that in the central interval. (dividing the TOTEM preliminary cross sections presented in Table 1 by the size of the ln M2 intervals (1.71 and 7.56) we find dσSD/d ln ξ = 1.05 mb and 0.44 mb for the first and the second mass
In order to reproduce the cross section in the diffractive dip region we find that the form factors, (14) have to have powers d1 = 0.52 and d2 = 0.51,√close to the form used long ago by Orear et al, F = exp(−b t) [17]
Summary
High-energy diffractive processes caused by pomeron exchange are usually described within the framework of Reggeon Field Theory (RFT) [1]. Recall that in conventional RFT it was assumed that all the transverse momenta are limited and that the Reggeon trajectories and the couplings (including those for the mu√ltipomeron vertices) do not depend on incoming energy, s. This framework allowed a satisfactory description of the available diffractive data up to the Tevatron energy. To make the discussion more transparent, we will not include explicitly the enhanced diagrams (which account for the rescattering of the intermediate ladder partons) The role of these diagrams is mainly to renormalise (diminish) the intercept of the original (bare) pomeron and to enlarge the characteristic transverse momentum which arises from the stronger absorption of the partons with low kt. We will use renormalised parameters of the pomeron trajectory (determined by fitting to the data), and a reasonable assumption for the energy and rapidity behaviour of kt
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