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arXiv · hep-ph/0612046

Unitarisation of the hard pomeron and black-disk limit at the LHC

J. -R. Cudell·O. V. Selyugin
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Abstract

Recent models of soft diffraction include a hard pomeron pole besides the usual soft term. Such models violate the black-disk limit around Tevatron energies, so that they need to be supplemented by a unitarisation scheme. Several such schemes are considered in this letter, where we show that they lead to a large uncertainty at the LHC. We also examine the impact of unitarisation on various small-t observables, the slope in t of the elastic cross section, or the ratio of the real to imaginary parts of the scattering amplitude, leading to the conclusion that the existence of a hard pomeron in soft scattering may be confirmed by LHC data.

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J. -R. Cudell, O. V. Selyugin. 2006-12-05. Unitarisation of the hard pomeron and black-disk limit at the LHC. https://doi.org/10.1016/j.physletb.2008.03.033

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