Rapidity-Dependent jet vetoes

Gangal, Shireen; Tackmann, Frank J.; Stahlhofen, Maximilian

Preprint/Internal Report

PUBDB-2015-00157

Rapidity-Dependent jet vetoes

Gangal, S.DESY* ; Stahlhofen, M. (Corresponding Author)DESY* ; Tackmann, F. J.DESY*

2014

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Report No.: DESY-14-240

Abstract: Jet vetoes are a prominent part of the signal selection in various analyses at the LHC. We discuss jet vetoes for which the transverse momentum of a jet is weighted by a smooth function of the jet rapidity. With a suitable choice of the rapidity-weighting function, such jet-veto variables can be factorized and resummed allowing for precise theory predictions. They thus provide a complementary way to divide phase space into exclusive jet bins. In particular, they provide a natural and theoretically clean way to implement a tight veto on central jets with the veto constraint getting looser for jets at increasingly forward rapidities. We mainly focus our discussion on the 0-jet case in color-singlet processes, using Higgs production through gluon fusion as a concrete example. For one of our jet-veto variables we compare the resummed theory prediction at NLL'+NLO with the recent differential cross section measurement by the ATLAS experiment in the $H\to\gamma\gamma$ channel, finding good agreement. We also propose that these jet-veto variables can be measured and tested against theory predictions in other SM processes, such as Drell-Yan, diphoton, and weak diboson production.

Keyword(s): jet: transverse momentum ; jet: rapidity ; gluon: fusion ; Drell-Yan process ; Higgs particle: production ; Higgs particle: decay ; final state: two-photon ; differential cross section ; rapidity dependence ; CERN LHC Coll ; ATLAS ; Higgs particle --> photon photon