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Novel SM-like Higgs decay into displaced heavy neutrino pairs in U(1)' models

Novel SM-like Higgs decay into displaced heavy neutrino pairs in U(1)' models
Novel SM-like Higgs decay into displaced heavy neutrino pairs in U(1)' models
We examine the observability of heavy neutrino (nu_h) signatures of a U(1)' enlarged Standard Model (SM) encompassing three heavy Majorana neutrinos alongside the known light neutrino states at the the Large Hadron Collider (LHC). We show that heavy neutrinos can be rather long-lived particles producing distinctive displaced vertices that can be accessed in the CERN LHC detectors. We concentrate here on the gluon fusion production mechanism gg -> H_{1,2} -> nu_h nu_h, where H_1 is the discovered SM-like Higgs and H_2 is a heavier state, yielding displaced leptons following nu_h decays into weak gauge bosons. Using data collected by the end of the LHC Run 2, these signatures would prove to be accessible with negligibly small background.
hep-ph
1029-8479
Accomando, E.
8ebc75d7-bd92-4f70-a974-7bc15ebf088f
Rose, L. Delle
67bc0c1b-393f-48ad-8122-cfe4426dbc1c
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Olaiya, E.
5270d470-e1b5-44d9-8e54-7cec8ed910eb
Shepherd-Themistocleous, C.
d3226af5-5027-47f6-8f98-7453131cfa35
Accomando, E.
8ebc75d7-bd92-4f70-a974-7bc15ebf088f
Rose, L. Delle
67bc0c1b-393f-48ad-8122-cfe4426dbc1c
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Olaiya, E.
5270d470-e1b5-44d9-8e54-7cec8ed910eb
Shepherd-Themistocleous, C.
d3226af5-5027-47f6-8f98-7453131cfa35

Accomando, E., Rose, L. Delle, Moretti, S., Olaiya, E. and Shepherd-Themistocleous, C. (2017) Novel SM-like Higgs decay into displaced heavy neutrino pairs in U(1)' models Journal of High Energy Physics, 2017, (04) (doi:10.1007/JHEP04(2017)081).

Record type: Article

Abstract

We examine the observability of heavy neutrino (nu_h) signatures of a U(1)' enlarged Standard Model (SM) encompassing three heavy Majorana neutrinos alongside the known light neutrino states at the the Large Hadron Collider (LHC). We show that heavy neutrinos can be rather long-lived particles producing distinctive displaced vertices that can be accessed in the CERN LHC detectors. We concentrate here on the gluon fusion production mechanism gg -> H_{1,2} -> nu_h nu_h, where H_1 is the discovered SM-like Higgs and H_2 is a heavier state, yielding displaced leptons following nu_h decays into weak gauge bosons. Using data collected by the end of the LHC Run 2, these signatures would prove to be accessible with negligibly small background.

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Accepted/In Press date: 28 March 2017
e-pub ahead of print date: 13 April 2017
Keywords: hep-ph
Organisations: Theory Group

Identifiers

Local EPrints ID: 411863
URI: http://eprints.soton.ac.uk/id/eprint/411863
ISSN: 1029-8479
PURE UUID: 3a7314c2-9071-4e58-9475-9fed13f15b6d

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Date deposited: 27 Jun 2017 16:31
Last modified: 02 Nov 2017 17:31

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Contributors

Author: E. Accomando
Author: L. Delle Rose
Author: S. Moretti
Author: E. Olaiya
Author: C. Shepherd-Themistocleous

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