Search for third-generation scalar leptoquarks in the tτ channel in proton-proton collisions at √s=8 TeV


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Khachatryan V., Sirunyan A., Tumasyan A., Adam W., Asilar E., Bergauer T., ...Daha Fazla

Journal of High Energy Physics, cilt.2015, sa.7, 2015 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2015 Sayı: 7
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1007/jhep07(2015)042
  • Dergi Adı: Journal of High Energy Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Beyond Standard Model, Hadron-Hadron Scattering
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

A search for pair production of third-generation scalar leptoquarks decaying to top quark and τ lepton pairs is presented using proton-proton collision data at a center-of-mass energy of s=8$$ \sqrt{s}=8 $$ TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb−1. The search is performed using events that contain an electron or a muon, a hadronically decaying τ lepton, and two or more jets. The observations are found to be consistent with the standard model predictions. Assuming that all leptoquarks decay to a top quark and a τ lepton, the existence of pair produced, charge −1/3, third-generation leptoquarks up to a mass of 685 GeV is excluded at 95% confidence level. This result constitutes the first direct limit for leptoquarks decaying into a top quark and a τ lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling λ333 ′.