Minijet veto: a tool for the heavy Higgs search at the LHC

Abstract

The distinct color flow of the $qq\to qqH,H\to W^{+}{W}^{-}$ process leads to suppressed radiation of soft gluons in the central region, a feature which is not shared by major background processes like $t\bar{t}$ production or $q\bar{q}\to W^{+}{W}^{-}$. For the leptonic decay of a heavy Higgs boson, $H\to W^{+}{W}^{-}\to {\ell }^{+}\nu {\ell }^{-}\bar{\nu }$, it is shown that these backgrounds are typically accompanied by minijet emission in the 20--40 GeV range. A central minijet veto thus constitutes a powerful background rejection tool. It may be regarded as a rapidity gap trigger at the semihard parton level which should work even at high luminosities.

18 pages, Revtex version 3 (can also run version 2). 3 postscript figures included (using uufiles). Compressed postscript version with figures available via anonymous ftp at ftp://phenom.physics.wisc.edu/pub/preprints/current/madph-94-856.ps.Z

References in corpus (4)

• Hadronic $ZZ$, $W^{-}{W}^{+}$, and $W^{\pm }Z$ Production with QCD Corrections and Leptonic Decays
• Large Rapidity Gaps in PP Collisions
• Rapidity gap signals in Higgs production at the SSC
• Heavy Higgs Boson Production in Association with Three Jets at Hadron Supercolliders

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