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Search for type-III seesaw heavy leptons in pp collisions at vs= 8 TeV with the ATLAS detector

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posted on 2023-06-09, 01:43 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, Carlos Chavez Barajas, Antonella De SantoAntonella De Santo, Tina Potter, Fabrizio SalvatoreFabrizio Salvatore, Itzebelt Santoyo Castillo, Kerim Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, et al The ATLAS Collaboration
A search for the pair production of heavy leptons (N0,L±) predicted by the type-III seesaw theory formulated to explain the origin of small neutrino masses is presented. The decay channels N0?W±l± (l=e,µ,t) and L±?W±? (?=?e,?µ,?t) are considered. The analysis is performed using the final state that contains two leptons (electrons or muons), two jets from a hadronically decaying W boson and large missing transverse momentum. The data used in the measurement correspond to an integrated luminosity of 20.3??fb-1 of pp collisions at sv=8??TeV collected by the ATLAS detector at the LHC. No evidence of heavy lepton pair production is observed. Heavy leptons with masses below 325–540 GeV are excluded at the 95% confidence level, depending on the theoretical scenario considered.

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Publication status

  • Published

File Version

  • Published version

Journal

Physical Review D

ISSN

1550-7998

Publisher

American Physical Society

Issue

3

Volume

92

Page range

032001

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-06-17

First Open Access (FOA) Date

2016-06-17

First Compliant Deposit (FCD) Date

2016-06-17

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