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Large width effects in processes of production of extra quarks decaying to Dark Matter at the LHC

Large width effects in processes of production of extra quarks decaying to Dark Matter at the LHC
Large width effects in processes of production of extra quarks decaying to Dark Matter at the LHC
This paper explores the effects of finite width in processes of pair production of a heavy eXtra Quark (XQ) with charge 2/3 and its subsequent decay into a Dark Matter (DM) candidate -- either scalar or vector -- and Standard Model (SM) up-type quarks at the Large Hadron Collider (LHC). This dynamics has been ignored so far in standard experimental searches of heavy quarks decaying to DM and we assess herein the regions of validity of current approaches, based on the assumption that the XQ has a narrow width. Further, we discuss the configurations of masses, widths and couplings where the latter breaks down.
hep-ph
Prager, Hugo
49e874e6-4343-4cc7-a85c-d6e78b0a8ab0
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
O'Brien, Dermot
25b3b9ee-f780-4762-b049-72dbec38aed3
Panizzi, Luca
e8ade38e-ee5d-4e2d-8307-3286a8b92740
Prager, Hugo
49e874e6-4343-4cc7-a85c-d6e78b0a8ab0
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
O'Brien, Dermot
25b3b9ee-f780-4762-b049-72dbec38aed3
Panizzi, Luca
e8ade38e-ee5d-4e2d-8307-3286a8b92740

Prager, Hugo, Moretti, Stefano, O'Brien, Dermot and Panizzi, Luca (2017) Large width effects in processes of production of extra quarks decaying to Dark Matter at the LHC. Proceedings of Science.

Record type: Article

Abstract

This paper explores the effects of finite width in processes of pair production of a heavy eXtra Quark (XQ) with charge 2/3 and its subsequent decay into a Dark Matter (DM) candidate -- either scalar or vector -- and Standard Model (SM) up-type quarks at the Large Hadron Collider (LHC). This dynamics has been ignored so far in standard experimental searches of heavy quarks decaying to DM and we assess herein the regions of validity of current approaches, based on the assumption that the XQ has a narrow width. Further, we discuss the configurations of masses, widths and couplings where the latter breaks down.

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More information

Published date: 13 June 2017
Additional Information: 6 pages, 7 figures, proceeding DIS 2017
Keywords: hep-ph

Identifiers

Local EPrints ID: 414470
URI: http://eprints.soton.ac.uk/id/eprint/414470
PURE UUID: 139e5b75-e1eb-48d0-afe9-1dc9d1cdb14c

Catalogue record

Date deposited: 29 Sep 2017 16:31
Last modified: 09 Nov 2021 11:28

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Contributors

Author: Hugo Prager
Author: Stefano Moretti
Author: Dermot O'Brien
Author: Luca Panizzi

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