Journal
PHYSICS LETTERS B
Volume 825, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2022.136889
Keywords
Type-III see-saw; Triplet fermions; Multi-lepton final states; Fat-jet signatures
Funding
- DST INSPIRE Research Grant [DST/INSPIRE/04/2014/002158]
- SERB Core Research Grant [CRG/2019/006831]
- SAMKHYA: High Performance Computing Facility provided by Institute of Physics, Bhubaneswar
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A search for triplet fermions at the Large Hadron Collider (LHC) is conducted in final states with multiple leptons and fat-jets, providing predictions for the mass and significance of discovering triplet fermions.
The type-III see-saw model holding out a riveting rationale for the minuscule neutrino masses caters for a well-to-do phenomenology at the Large Hadron Collider (LHC). Several searches targetting the triplet fermions have been performed at the LHC. Not only are the signals for the leptonic final states considered in these searches suppressed by the branching fractions of the Standard Model (SM) bosons, but they are also beset with considerably large SM backgrounds. Thus, these searches are deemed not to be sensitive enough in probing the triplet fermions much heavier than 1 TeV. To this end, we perform a search for the triplet fermions in final states with multiple leptons and fat-jets that are cleaner than the usual LHC searches and allow kinematic reconstruction of the triplets. After performing a systematic and comprehensive analysis with seven distinct final states, we project the required luminosities for both 3 sigma and 5 sigma discoveries of the triplet fermions as a function of their mass. The triplet fermions with mass as large as 1265 (1380) and 1480 (1600) GeV could be discovered with 5 sigma (3 sigma) significance at 500 and 3000 fb(-1) luminosities, respectively. (c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
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