Radiative QCD backgrounds to exclusive \(H\to b\bar{b}\) production: radiation from the screening gluon

Regular Article - Theoretical Physics

Abstract

Central exclusive Higgs boson production, ppp H p, at the LHC can provide an important complementary contribution to the comprehensive study of the Higgs sector in a remarkably clean topology. The \(b\bar{b}\) Higgs decay mode is especially attractive, and for certain BSM scenarios may even become the discovery channel. Obvious requirements for the success of such exclusive measurements are strongly suppressed and controllable backgrounds. One potential source of background comes from additional gluon radiation which leads to a three-jet \(b\bar{b}g\) final state. We perform an explicit calculation of the subprocesses \(gg\to q\bar{q}g\), ggggg in the case of ‘internal’ gluon radiation from the spectator, t-channel screening gluon, when the two incoming active t-channel gluons form a color octet. We find that the overall contribution of this source of background is orders of magnitude lower than that caused by the main irreducible background resulting from the \(gg^{\mathrm{PP}}\to b\bar{b}\) subprocess. Therefore, this background contribution can be safely neglected.

Keywords

Higgs Boson Gluon Radiation Central Exclusive Production Outgoing Proton Hard Subprocess 

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2009

Authors and Affiliations

  1. 1.Department of Physics and Institute for Particle Physics PhenomenologyUniversity of DurhamDurhamUK
  2. 2.Petersburg Nuclear Physics InstituteSt. PetersburgRussia

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