The University of Southampton
University of Southampton Institutional Repository
Warning ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

Search for 'invisible' Higgs signals at LHC via associated production with gauge bosons

Search for 'invisible' Higgs signals at LHC via associated production with gauge bosons
Search for 'invisible' Higgs signals at LHC via associated production with gauge bosons
A light Higgs boson with substantial branching ratio into invisible channels can occur in a variety of models with: light neutralinos, spontaneously broken lepton number, radiatively generated neutrino masses, additional singlet scalar(s) and/or right handed neutrinos in the extra dimensions of TeV scale gravity. We study the observability of the WH and ZH modes at LHC with H decaying invisibly, by carrying out a detailed simulation with two event generators (HERWIG and PYTHIA) and realistic detector simulations (GETJET and CMSJET). We find that the signal with 'single lepton plus missing ET' resulting from WH production suffers from a very large background due to the (off-shell) W* production via the Drell-Yan process. In contrast, the ZH mode provides a clean signal in the 'dilepton plus missing ET' channel. By exploiting this second signature, we show that invisible branching ratios of Higgs bosons, BRinv, larger than ?0.42 (0.70) can be probed at 5? level for MH = 120 (160) GeV, respectively, assuming an accumulated luminosity of L = 100 fb-1.
0370-2693
184-192
Godbole, R. M.
c865d120-2aac-420d-96e4-8bb3859ac5f1
Guchait, M.
e9264f49-e483-426e-8680-69c7281ded55
Mazumdar, K.
204ac161-ddf0-4581-9a0a-6cfc7131b186
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Roy, D.P.
0f574338-f3f8-456b-8e42-7ac7542fd4d6
Godbole, R. M.
c865d120-2aac-420d-96e4-8bb3859ac5f1
Guchait, M.
e9264f49-e483-426e-8680-69c7281ded55
Mazumdar, K.
204ac161-ddf0-4581-9a0a-6cfc7131b186
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Roy, D.P.
0f574338-f3f8-456b-8e42-7ac7542fd4d6

Godbole, R. M., Guchait, M., Mazumdar, K., Moretti, S. and Roy, D.P. (2003) Search for 'invisible' Higgs signals at LHC via associated production with gauge bosons. Physics Letters B, 571 (3/4), 184-192. (doi:10.1016/j.physletb.2003.06.066).

Record type: Article

Abstract

A light Higgs boson with substantial branching ratio into invisible channels can occur in a variety of models with: light neutralinos, spontaneously broken lepton number, radiatively generated neutrino masses, additional singlet scalar(s) and/or right handed neutrinos in the extra dimensions of TeV scale gravity. We study the observability of the WH and ZH modes at LHC with H decaying invisibly, by carrying out a detailed simulation with two event generators (HERWIG and PYTHIA) and realistic detector simulations (GETJET and CMSJET). We find that the signal with 'single lepton plus missing ET' resulting from WH production suffers from a very large background due to the (off-shell) W* production via the Drell-Yan process. In contrast, the ZH mode provides a clean signal in the 'dilepton plus missing ET' channel. By exploiting this second signature, we show that invisible branching ratios of Higgs bosons, BRinv, larger than ?0.42 (0.70) can be probed at 5? level for MH = 120 (160) GeV, respectively, assuming an accumulated luminosity of L = 100 fb-1.

This record has no associated files available for download.

More information

Published date: 9 October 2003

Identifiers

Local EPrints ID: 57278
URI: http://eprints.soton.ac.uk/id/eprint/57278
ISSN: 0370-2693
PURE UUID: 26abfba6-29ba-4515-92f5-72539612c36b

Catalogue record

Date deposited: 14 Aug 2008
Last modified: 09 Nov 2021 09:53

Export record

Altmetrics

Contributors

Author: R. M. Godbole
Author: M. Guchait
Author: K. Mazumdar
Author: S. Moretti
Author: D.P. Roy

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×