Search for a light charged Higgs boson in the decay channel H+ → c[bar over s] in t[bar over t] events using pp collisions at √s = 7 TeV with the ATLAS detector

G Aad, T Abajyan, B Abbott,J Abdallah,S Abdel Khalek,AA Abdelalim,O Abdinov,R Aben, B Abi, M Abolins, OS AbouZeid, H Abramowicz, H Abreu,BS Acharya,L Adamczyk,DL Adams, TN Addy,J Adelman, S Adomeit, P Adragna, T Adye, S Aefsky,JA Aguilar-Saavedra, M Agustoni,SP Ahlen, F Ahles,A Ahmad, M Ahsan, G Aielli,TPA Åkesson, G Akimoto,AV Akimov,MA Alam,J Albert, S Albrand,M Aleksa, IN Aleksandrov, F Alessandria,C Alexa, G Alexander,G Alexandre, T Alexopoulos,M Alhroob,M Aliev,G Alimonti, J Alison, BMM Allbrooke,LJ Allison, PP Allport, SE Allwood-Spiers,J Almond, A Aloisio, R Alon, A Alonso, F Alonso, A Altheimer,B Alvarez Gonzalez,MG Alviggi, K Amako,C Amelung,VV Ammosov, SP Amor Dos Santos,A Amorim,S Amoroso, N Amram, C Anastopoulos, LS Ancu,N Andari, T Andeen, CF Anders, G Anders,KJ Anderson,A Andreazza, V Andrei,ML Andrieux,XS Anduaga,S Angelidakis,P Anger, A Angerami, F Anghinolfi, A Anisenkov, N Anjos,A Annovi, A Antonaki,M Antonelli,A Antonov,J Antos, F Anulli,M Aoki, S Aoun,L Aperio Bella, R Apolle, G Arabidze, I Aracena,Y Arai, ATH Arce, S Arfaoui,JF Arguin, S Argyropoulos,E Arik,M Arik, AJ Armbruster, O Arnaez,V Arnal, A Artamonov, G Artoni, D Arutinov, S Asai, S Ask, B Åsman, D Asner, L Asquith, K Assamagan, A Astbury,M Atkinson,B Aubert, E Auge, K Augsten, M Aurousseau, G Avolio, D Axen, G Azuelos, Y Azuma,MA Baak,G Baccaglioni, C Bacci,AM Bach, H Bachacou, K Bachas,M Backes,M Backhaus,J Backus Mayes, E Badescu, P Bagnaia,Y Bai,DC Bailey, T Bain, JT Baines,OK Baker,S Baker, P Balek, E Banas,P Banerjee,Sw Banerjee, D Banfi, A Bangert,V Bansal, HS Bansil, L Barak, SP Baranov

user-5ebe3bbdd0b15254d6c50b2c（2013）

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摘要

A search for a charged Higgs boson (H+) in t[bar over t] decays is presented, where one of the top quarks decays via t → H+b, followed by H+ → two jets (c[bar over s]). The other top quark decays to Wb, where the W boson then decays into a lepton (e/μ) and a neutrino. The data were recorded in pp collisions at √s = 7 TeV by the ATLAS detector at the LHC in 2011, and correspond to an integrated luminosity of 4.7 fb−1. With no observation of a signal, 95 % confidence level (CL) upper limits are set on the decay branching ratio of top quarks to charged Higgs bosons varying between 5 % and 1 % for H+ masses between 90 GeV and 150 GeV, assuming B(H+ → c[bar over s]) = 100 %.

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