A search for prompt lepton-jets in pp collisions at root s=7 TeV with the ATLAS detector


Aad G., Abajyan T., Abbott B., Abdallah J., Khalek S. A., Abdelalim A. A., ...Daha Fazla

PHYSICS LETTERS B, cilt.719, ss.299-317, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 719
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.physletb.2013.01.034
  • Dergi Adı: PHYSICS LETTERS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.299-317
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

We present a search for a light (mass < 2 GeV) boson predicted by Hidden Valley supersymmetric models that decays into a final state consisting of collimated muons or electrons, denoted "lepton-jets". The analysis uses 5 fb(-1) of root s = 7 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider to search for the following signatures: single lepton-jets with at least four muons; pairs of lepton-jets, each with two or more muons; and pairs of lepton-jets with two or more electrons. This study finds no statistically significant deviation from the Standard Model prediction and places 95% confidence-level exclusion limits on the production cross section times branching ratio of light bosons for several parameter sets of a Hidden Valley model. (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.