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

V. A. Khoze; A. D. Martin; M. G. Ryskin; A. G. Shuvaev; I. V. Surnin

doi:10.1140/epjc/s10052-019-7120-x

EPJ

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

V. A. Khoze¹^,2, A. D. Martin¹^*, M. G. Ryskin¹^,2, A. G. Shuvaev² and I. V. Surnin²^,3

¹ Institute for Particle Physics Phenomenology, University of Durham, Durham, DH1 3LE, UK
² Kurchatov National Research Centre, Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188300, Russia
³ St. Petersburg State University, St. Petersburg, Russia

Received: 24 May 2019
Accepted: 8 July 2019
Published online: 18 July 2019

Abstract

We consider the central exclusive production of high

jets

. 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

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.