Search for new resonances with top quarks

Abstract

Many models of physics beyond the Standard Model predict new gauge bosons that decay to a top quark pair or a top quark and a bottom quark. The most recent results from new resonance searches for Z′ → tt → W+bW−b and W′ → tb → Wbb are presented using the proton-proton collision data at a centre-of-mass energy of 8 TeV. The searches are performed with the ATLAS and CMS experiments at the LHC using an integrated luminosity of 20.3 fb−1 and 19.7 fb−1, respectively. The analyses are done in the leptonic and hadronic decay modes of the top quark. No evidence for new resonances with top quark is observed and 95% confidence level (CL) limits on the production rate are determined for massive states in theories beyond the Standard Model. Presented at TOP2015 8th International Workshop on Top Quark Physics Search for new resonances with top quark Min Suk Kim∗ Department of Physics, Kyungpook National University, Daegu, South-Korea E-mail: minsuk@cern.ch Many models of physics beyond the Standard Model predict new gauge bosons that decay to a top quark pair or a top quark and a bottom quark. The most recent results from new resonance searches for Z′ → tt→W+bW−b and W′ → tb→Wbb are presented using the proton-proton collision data at a centre-of-mass energy of 8 TeV. The searches are performed with the ATLAS and CMS experiments at the LHC using an integrated luminosity of 20.3 fb−1 and 19.7 fb−1, respectively. The analyses are done in the leptonic and hadronic decay modes of the top quark. No evidence for new resonances with top quark is observed and 95% confidence level (CL) limits on the production rate are determined for massive states in theories beyond the Standard Model. 8th International Workshop on Top Quark Physics, TOP2015 14-18 September, 2015 Ischia, Italy