Search for heavy resonances decaying to tau lepton pairs in proton-proton collisions at root s=13 TeV


Ruiz Vargas J. C. , Battilana C., Malberti M., Pigazzini S., Nardo G. D. , Thyssen F., ...More

JOURNAL OF HIGH ENERGY PHYSICS, no.2, 2017 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: Issue: 2
  • Publication Date: 2017
  • Doi Number: 10.1007/jhep02(2017)048
  • Title of Journal : JOURNAL OF HIGH ENERGY PHYSICS

Abstract

A search for heavy resonances that decay to tau lepton pairs is performed using proton-proton collisions at root s = 13 TeV. The data were collected with the CMS detector at the CERN LHC and correspond to an integrated luminosity of 2.2 fb(-1). The observations are in agreement with standard model predictions. An upper limit at 95% confidence level on the product of the production cross section and branching fraction into tau lepton pairs is calculated as a function of the resonance mass. For the sequential standard model, the presence of Z' bosons decaying into tau lepton pairs is excluded for Z/ masses below 2.1 TeV, extending previous limits for this final state. For the topcolor-assisted technicolor model, which predicts Z' bosons that preferentially couple to third-generation fermions, Z' masses below 1.7 TeV are excluded, representing the most stringent limit to date.