Search for type-III seesaw heavy leptons in pp collisions at √s = 8 TeV with the ATLAS detector /G. Aad, B. Abbott, J. Abdallah [et.al.]

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Другой Автор
Aad, G.
Abdallah, J.
Chelkov, G. A.
Abbott, B.
Источник
Physical Review D 2015 Vol. 92, № 3. P. 032001-1-032001-20
Аннотация
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 → Wl∓ (l ¼ e; μ; τ) and L → Wν (ν ¼ νe; νμ; ντ) 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 pffisffiffi ¼ 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 GeVare excluded at the 95% confidence level, depending on the theoretical scenario considered.
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$a 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 → Wl∓ (l ¼ e; μ; τ) and L → Wν (ν ¼ νe; νμ; ντ) 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 pffisffiffi ¼ 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 GeVare excluded at the 95% confidence level, depending on the theoretical scenario considered.
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Резюме
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 → Wl∓ (l ¼ e; μ; τ) and L → Wν (ν ¼ νe; νμ; ντ) 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 pffisffiffi ¼ 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 GeVare excluded at the 95% confidence level, depending on the theoretical scenario considered.