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Title: Gluon-gluon contributions to W+ W- production and Higgs interference effects

Abstract

In this paper we complete our re-assessment of the production of W boson pairs at the LHC, by calculating analytic results for the gg {yields} W{sup +}W{sup -} {yields} {nu}{ell}{sup +}{ell}{sup -}{bar {nu}} process including the effect of massive quarks circulating in the loop. Together with the one-loop amplitudes containing the first two generations of massless quarks propagating in the loop, these diagrams can give a significant contribution with a large flux of gluons. One of the component parts of this calculation is the production of a standard model Higgs boson, gg {yields} H and its subsequent decay, H {yields} W{sup +}({yields} {nu}{ell}{sup +})W{sup -}({yields} {ell}{sup -}{bar {nu}}). We will quantify the importance of the interference between the Higgs boson production process and the gluon-induced continuum production in the context of searches for the Higgs boson at the Tevatron and the LHC. For instance, for m{sub H} < 140 GeV the effect of the interference typically results in around a 10% reduction in the expected number of Higgs signal events. The majority of this interference is due to non-resonant contributions. Therefore cuts on the transverse mass such as those currently used by the ATLAS collaboration reduce the destructive interference tomore » about a 1% effect. We advocate that a cut on the maximum transverse mass be used in future Higgs searches in this channel.« less

Authors:
; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1027244
Report Number(s):
FERMILAB-PUB-11-340-T
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1107.5569; TRN: US1105199
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Volume: 2011; Journal Issue: 10; Journal ID: ISSN 1029-8479
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS, 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; DECAY; FERMILAB TEVATRON; GLUONS; HIGGS BOSONS; INTERMEDIATE BOSONS; PRODUCTION; QUARKS; STANDARD MODEL; Experiment-HEP, Phenomenology-HEP

Citation Formats

Campbell, John M, Ellis, R Keith, and Williams, Ciaran. Gluon-gluon contributions to W+ W- production and Higgs interference effects. United States: N. p., 2011. Web. doi:10.1007/JHEP10(2011)005.
Campbell, John M, Ellis, R Keith, & Williams, Ciaran. Gluon-gluon contributions to W+ W- production and Higgs interference effects. United States. doi:10.1007/JHEP10(2011)005.
Campbell, John M, Ellis, R Keith, and Williams, Ciaran. Fri . "Gluon-gluon contributions to W+ W- production and Higgs interference effects". United States. doi:10.1007/JHEP10(2011)005.
@article{osti_1027244,
title = {Gluon-gluon contributions to W+ W- production and Higgs interference effects},
author = {Campbell, John M and Ellis, R Keith and Williams, Ciaran},
abstractNote = {In this paper we complete our re-assessment of the production of W boson pairs at the LHC, by calculating analytic results for the gg {yields} W{sup +}W{sup -} {yields} {nu}{ell}{sup +}{ell}{sup -}{bar {nu}} process including the effect of massive quarks circulating in the loop. Together with the one-loop amplitudes containing the first two generations of massless quarks propagating in the loop, these diagrams can give a significant contribution with a large flux of gluons. One of the component parts of this calculation is the production of a standard model Higgs boson, gg {yields} H and its subsequent decay, H {yields} W{sup +}({yields} {nu}{ell}{sup +})W{sup -}({yields} {ell}{sup -}{bar {nu}}). We will quantify the importance of the interference between the Higgs boson production process and the gluon-induced continuum production in the context of searches for the Higgs boson at the Tevatron and the LHC. For instance, for m{sub H} < 140 GeV the effect of the interference typically results in around a 10% reduction in the expected number of Higgs signal events. The majority of this interference is due to non-resonant contributions. Therefore cuts on the transverse mass such as those currently used by the ATLAS collaboration reduce the destructive interference to about a 1% effect. We advocate that a cut on the maximum transverse mass be used in future Higgs searches in this channel.},
doi = {10.1007/JHEP10(2011)005},
journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 10,
volume = 2011,
place = {United States},
year = {2011},
month = {7}
}