Production of digluon and quark-antiquark dijets in central exclusive processes

Abstract

We discuss exclusive central production of Higgs boson, quark-antiquark and digluon dijets. Some differential distributions are shown and disussed. Irreducible leading-order $b\bar{b}$ background to Higgs production is calculated. The signal-to-background ratio is shown and improvements are suggested by imposing cuts on $b$ ($\bar{b}$) transverse momenta and rapidities. We disuss also gluonic dijet production. Here we use rather reggeon-reggeon-gluon vertices. We discuss briefly also a new mechanism of emission of gluons from different $t$-channel gluons (reggeons). The latter contribution turned out to be rather small. When gluons are missidentified as $b$ or $\bar{b}$ jets the latter contribution constitutes a reducible but large contribution to exclusive Standard Model Higgs boson.

Comments: 7 pages, 8 figures, invited talk at the EDS Blois workshop in Qui Nhon, Vietnam, December 15-21, 2011