Search for charged Higgs bosons through the violation of lepton universality in tt events using pp collision data at √S=7 TeV with the ATLAS experiment. Journal of High Energy Physics Volume 2013, Issue 3, 2013, Article number 076
14 сентября 2018
234
Предметная область | — |
Выходные данные | — |
Ключевые слова | — |
Вид публикации | Статья |
Контактные данные автора публикации | Aad, G.bp, Abajyan, T.ad, Abbott, B.eh, Abdallah, J.p, Khalek, S.A.el, Abdelalim, A.A. et.al. |
Ссылка на публикацию в интернете | www.scopus.com/record/display.url?origin=recordpage&eid=2-s2.0-84876245762&citeCnt=3&noHighlight=false&sort=plf-f&src=s&st1=MEPhI&nlo=&nlr=&nls=&sid=F0743CC1BB1CEC168410A18CB87C48A7.Vdktg6RVtMfaQJ4pNTCQ:6500&sot=b&sdt=b&sl=31&s=AFFIL(MEPhI) AND PU |
Аннотация
In several extensions of the Standard Model, the top quark can decay into a bottom quark and a light charged Higgs boson H , t → bH , in addition to the Standard Model decay t → bW. Since W bosons decay to the three lepton generations equally, while H maypredominantlydecayinto τν, charged Higgs bosons can be searched for using the violation of lepton universality in top quark decays. The analysis in this paper is based on 4.6 fb-1 of proton-proton collision data at √s=7 TeV collected by the ATLAS experiment at the Large Hadron Collider. Signatures containing leptons (e or μ) and/or a hadronically decaying τ (τ had) are used. Event yield ratios between e τ had and e μ, as well as between μ τ had andμ e, final states are measured in the data and compared to predictions from simulations. This ratio-based method reduces the impact of systematic uncertainties in the analysis. No significant deviation from the Standard Model predictions is observed. With the assumption that the branching fraction ℬ (H → τν) is 100%, upper limits in the range 3.2%-4.4% can be placed on the branching fraction ℬ (t → bH ) for charged Higgs boson masses m H in the range 90-140 GeV. After combination with results from a search for charged Higgs bosons in toverline{t} decays using the τ had jets final state, upper limits on ℬ (t → bH ) can be set in the range 0.8%-3.4%, for m H in the range 90-160 GeV.[Figure not available: see fulltext.] © 2013 Cern for the benefit of the ATLAS collaboration.
Author keywords
Hadron-Hadron Scattering
ПодробнееAuthor keywords
Hadron-Hadron Scattering
Для того чтобы оставить комментарий необходимо авторизоваться.