Search for type-III Seesaw heavy leptons in $pp$ collisions at $\sqrt{s}= 8$ TeV with the ATLAS Detector - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Physical Review D Année : 2015

Search for type-III Seesaw heavy leptons in $pp$ collisions at $\sqrt{s}= 8$ TeV with the ATLAS Detector

G. Aad (1) , Z. Barnovska (2) , N. Berger (2) , M. Delmastro (2) , L. Di Ciaccio (2) , S. Elles (2) , T. Hryn’ova (2) , S. Jézéquel (2) , H. Keoshkerian (2) , I. Koletsou (2) , R. Lafaye (2) , J. Leveque (2) , N. Massol (2) , G. Sauvage (2) , E. Sauvan (2) , M. Schwoerer (2) , O. Simard (2) , T. Todorov (2) , I. Wingerter-Seez (2) , E. Yatsenko (2) , G. Rahal (3) , D. Boumediene (4) , Emmanuel Busato (4) , D. Calvet (4) , S. Calvet (4) , J. Donini (4) , E. Dubreuil (4) , G. Gilles (4) , Ph. Gris (4) , H. Liao (4) , R. Madar (4) , D. Pallin (4) , S.M. Romano Saez (4) , C. Santoni (4) , D. Simon (4) , Timothée Theveneaux-Pelzer (4) , F. Vazeille (4) , M.K. Ayoub (5) , A. Bassalat (5) , C. Becot (5) , S. Binet (5) , C. Bourdarios (5) , J.B. de Vivie De Regie (5) , D. Delgove (5) , L. Duflot (5) , M. Escalier (5) , L. Fayard (5) , D. Fournier (5) , E.L. Gkougkousis (5) , J.-F. Grivaz (5) , T. Guillemin (5) , F. Hariri (5) , S. Henrot-Versillé (5) , J. Hrivnac (5) , L. Iconomidou-Fayard (5) , M. Kado (5) , A. Lounis (5) , N. Makovec (5) , N. Morange (5) , C. Nellist (5) , L. Poggioli (5) , P. Puzo (5) , A. Renaud (5) , D. Rousseau (5) , G. Rybkin (5) , A.C. Schaffer (5) , E. Scifo (5) , L. Serin (5) , S. Simion (5) , R. Tanaka (5) , H.L. Tran (5) , D. Zerwas (5) , Zhongkai Zhang (5) , Y. Zhao (5) , L. Alio (1) , M. Barbero (1) , Y. Coadou (1) , C. Diaconu (1) , Sara Diglio (1) , F. Djama (1) , O. Duccu (1) , L. Feligioni (1) , J. Gao (6) , G.D. Hallewell (1) , F. Hubaut (1) , S.J. Kahn (1) , E. B. F. G. Knoops (1) , E. Le Guirriec (1) , J. Liu (1) , K. Liu (1) , D. Madaffari (1) , K. Mochizuki (1) , E. Monnier (1) , S. Muanza (1) , Y. Nagai (1) , E. Nagy (1) , P. Pralavorio (1) , A. Rozanov , T. Serre (1) , M. Talby (1) , R.E. Ticse Torres (1) , E. Tiouchichine (1) , S. Tisserant (1) , J. Toth (1) , F. Touchard (1) , L. Vacavant (1) , S. Albrand (7) , J. Brown (7) , J. Collot (7) , S. Crépé-Renaudin (7) , P.A. Delsart (7) , C. Gabaldon (7) , M.H. Genest (7) , J.Y. Hostachy (7) , F. Ledroit-Guillon (7) , A. Lleres (7) , A. Lucotte (7) , F. Malek (7) , C. Monini (7) , J. Stark (7) , B. Trocmé (7) , M. Wu (7)
G. Aad
N. Berger
T. Hryn’ova
S. Calvet
D. Rousseau
Y. Coadou
A. Rozanov
  • Fonction : Auteur

Résumé

A search for the pair-production of heavy leptons ($N^0,L^{\pm}$) predicted by the type-III seesaw theory formulated to explain the origin of small neutrino masses is presented. The decay channels $N^0\rightarrow W^{\pm}l^{\mp}$ ($\ell = e, \mu, \tau$) and $L^{\pm}\rightarrow W^\pm \nu$ ($\nu=\nu_e, \nu_\mu, \nu_\tau$) 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 $\sqrt{s} = 8$ 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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Dates et versions

in2p3-01164188 , version 1 (07-09-2023)

Identifiants

Citer

G. Aad, Z. Barnovska, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Search for type-III Seesaw heavy leptons in $pp$ collisions at $\sqrt{s}= 8$ TeV with the ATLAS Detector. Physical Review D, 2015, 92, pp.032001. ⟨10.1103/PhysRevD.92.032001⟩. ⟨in2p3-01164188⟩
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