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The fusion of hard and soft pomerons : 3-jet diffractive production.

Khoze, V. A. and Martin, A. D. and Ryskin, M. G. and Shuvaev, A. G. and Surnin, I. V. (2019) 'The fusion of hard and soft pomerons : 3-jet diffractive production.', The European physical journal C., 79 (7). p. 605.


We consider the central exclusive production of high E_T jets pp\rightarrow p+(X+\mathrm{dijet})+p. In particular we study the possible contamination of the purely exclusive signal by semi-exclusive production where no other secondaries are emitted in one hemisphere, between the highest E_T dijet and the recoil proton, while in the other hemisphere a third jet, plus possibly additional hadron activity, is allowed, but still separated from the incoming proton by a large rapidity gap. This process arising from the fusion of a hard and a soft Pomeron has not been considered before. It turns out that it gives a negligible contribution. The calculation involves a careful treatment of the QCD colour structure of the amplitudes.

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Publisher statement:This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Date accepted:08 July 2019
Date deposited:08 January 2020
Date of first online publication:18 July 2019
Date first made open access:02 August 2019

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