New Production Mechanism for Heavy Neutrinos at the LHC

We study a new production mechanism for heavy neutrinos at the LHC, which dominates over the usually considered s-channel W-exchange diagram for heavy-neutrino masses larger than 100-200 GeV. The new mechanism is infrared-enhanced by t-channel W\gamma-fusion processes. This has important implication...

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Detalles Bibliográficos
Autores principales: Dev, P S Bhupal, Pilaftsis, Apostolos, Yang, Un-ki
Lenguaje:eng
Publicado: 2013
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.112.081801
http://cds.cern.ch/record/1571098
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author Dev, P S Bhupal
Pilaftsis, Apostolos
Yang, Un-ki
author_facet Dev, P S Bhupal
Pilaftsis, Apostolos
Yang, Un-ki
author_sort Dev, P S Bhupal
collection CERN
description We study a new production mechanism for heavy neutrinos at the LHC, which dominates over the usually considered s-channel W-exchange diagram for heavy-neutrino masses larger than 100-200 GeV. The new mechanism is infrared-enhanced by t-channel W\gamma-fusion processes. This has important implications for experimental tests of the seesaw mechanism for neutrino masses, and in particular, in the present and upcoming heavy neutrino searches at the LHC. We find that the direct collider limits on the light-to-heavy neutrino mixing can be significantly improved by a factor of few, when this new production channel is properly taken into account. The scope of this new mechanism can equally well be extended to other exotic searches at the LHC.
id cern-1571098
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15710982019-09-30T06:29:59Zdoi:10.1103/PhysRevLett.112.081801http://cds.cern.ch/record/1571098engDev, P S BhupalPilaftsis, ApostolosYang, Un-kiNew Production Mechanism for Heavy Neutrinos at the LHCParticle Physics - PhenomenologyWe study a new production mechanism for heavy neutrinos at the LHC, which dominates over the usually considered s-channel W-exchange diagram for heavy-neutrino masses larger than 100-200 GeV. The new mechanism is infrared-enhanced by t-channel W\gamma-fusion processes. This has important implications for experimental tests of the seesaw mechanism for neutrino masses, and in particular, in the present and upcoming heavy neutrino searches at the LHC. We find that the direct collider limits on the light-to-heavy neutrino mixing can be significantly improved by a factor of few, when this new production channel is properly taken into account. The scope of this new mechanism can equally well be extended to other exotic searches at the LHC.arXiv:1308.2209MAN-HEP-2013-15CERN-PH-TH-2013-192oai:cds.cern.ch:15710982013-08-09
spellingShingle Particle Physics - Phenomenology
Dev, P S Bhupal
Pilaftsis, Apostolos
Yang, Un-ki
New Production Mechanism for Heavy Neutrinos at the LHC
title New Production Mechanism for Heavy Neutrinos at the LHC
title_full New Production Mechanism for Heavy Neutrinos at the LHC
title_fullStr New Production Mechanism for Heavy Neutrinos at the LHC
title_full_unstemmed New Production Mechanism for Heavy Neutrinos at the LHC
title_short New Production Mechanism for Heavy Neutrinos at the LHC
title_sort new production mechanism for heavy neutrinos at the lhc
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevLett.112.081801
http://cds.cern.ch/record/1571098
work_keys_str_mv AT devpsbhupal newproductionmechanismforheavyneutrinosatthelhc
AT pilaftsisapostolos newproductionmechanismforheavyneutrinosatthelhc
AT yangunki newproductionmechanismforheavyneutrinosatthelhc

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