An Effective $p_T$ Cutoff for the Isolalated Lepton Background from Bottom Decay --

Details An Effective $p_T$ Cutoff for the Isolalated Lepton Background from Bottom Decay -- An Effective $p_T$ Cutoff for the Isolalated Lepton Background from Bottom Decay --

1993-05-28

arxiv.org/abs/hep-ph/9305344v1

Phys.Rev.D49:183-189,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

TIFR/TH/93-23 (LATEX, 20 pages, 7 figures available on request)

Scientific paper

10.1103/PhysRevD.49.183

There is a strong correlation between the $p_T$ and isolation of the lepton coming from $B$ decay. Consequently the isolated lepton background from $B$ decay goes down rapidly with increasing lepton $p_T$; and there is a $p_T$ cutoff beyond which it effectively vanishes. For the isolation cut of $E^{AC}_T < 10$ GeV, appropriate for LHC, the lepton $p_T$ cutoff is 80 GeV. This can be exploited to effectively eliminate the $B$ background from the like sign dilepton channel apropriate for Majorana particle searches, as well as the unlike sign dilepton and the single lepton channels appropriate for the top quark search. We illustrate this with a detailed analysis of the $B$ background in these channels along with the signals at LHC energy using both parton level MC and ISAJET programs.

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