Search for W′→tb¯ in the lepton plus jets final state in proton–proton collisions at a centre-of-mass energy of s=8 TeV with the ATLAS detector

doi:10.1016/j.physletb.2015.02.051

Physics Letters B

Volume 743, 9 April 2015, Pages 235-255

https://doi.org/10.1016/j.physletb.2015.02.051 Get rights and content

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Abstract

A search for new charged massive gauge bosons, called $W^{'}$ , is performed with the ATLAS detector at the LHC, in proton–proton collisions at a centre-of-mass energy of $\sqrt{s} = 8 TeV$ , using a dataset corresponding to an integrated luminosity of $20.3 {fb}^{- 1}$ . This analysis searches for $W^{'}$ bosons in the $W^{'} \to t \bar{b}$ decay channel in final states with electrons or muons, using a multivariate method based on boosted decision trees. The search covers masses between 0.5 and 3.0 TeV, for right-handed or left-handed $W^{'}$ bosons. No significant deviation from the Standard Model expectation is observed and limits are set on the $W^{'} \to t \bar{b}$ cross-section times branching ratio and on the $W^{'}$ -boson effective couplings as a function of the $W^{'}$ -boson mass using the ${CL}_{s}$ procedure. For a left-handed (right-handed) $W^{'}$ boson, masses below 1.70 (1.92) TeV are excluded at 95% confidence level.

Cited by (0)

^a: Also at Department of Physics, King's College London, London, United Kingdom.

^b: Also at Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan.

^c: Also at Novosibirsk State University, Novosibirsk, Russia.

^d: Also at Particle Physics Department, Rutherford Appleton Laboratory, Didcot, United Kingdom.

^e: Also at TRIUMF, Vancouver, BC, Canada.

^f: Also at Department of Physics, California State University, Fresno, CA, United States.

^g: Also at Tomsk State University, Tomsk, Russia.

^h: Also at CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France.

ⁱ: Also at Università di Napoli Parthenope, Napoli, Italy.

^j: Also at Institute of Particle Physics (IPP), Canada.

^k: Also at Department of Physics, St. Petersburg State Polytechnical University, St. Petersburg, Russia.

^l: Also at Department of Financial and Management Engineering, University of the Aegean, Chios, Greece.

^m: Also at Louisiana Tech University, Ruston, LA, United States.

ⁿ: Also at Institucio Catalana de Recerca i Estudis Avancats, ICREA, Barcelona, Spain.

^o: Also at Department of Physics, The University of Texas at Austin, Austin, TX, United States.

^p: Also at Institute of Theoretical Physics, Ilia State University, Tbilisi, Georgia.

^q: Also at CERN, Geneva, Switzerland.

^r: Also at Ochadai Academic Production, Ochanomizu University, Tokyo, Japan.

^s: Also at Manhattan College, New York, NY, United States.

^t: Also at Institute of Physics, Academia Sinica, Taipei, Taiwan.

^u: Also at LAL, Université Paris-Sud and CNRS/IN2P3, Orsay, France.

^v: Also at Academia Sinica Grid Computing, Institute of Physics, Academia Sinica, Taipei, Taiwan.

^w: Also at Laboratoire de Physique Nucléaire et de Hautes Energies, UPMC and Université Paris-Diderot and CNRS/IN2P3, Paris, France.

^x: Also at School of Physical Sciences, National Institute of Science Education and Research, Bhubaneswar, India.

^y: Also at Dipartimento di Fisica, Sapienza Università di Roma, Roma, Italy.

^z: Also at Moscow Institute of Physics and Technology State University, Dolgoprudny, Russia.

^aa: Also at Section de Physique, Université de Genève, Geneva, Switzerland.

^ab: Also at International School for Advanced Studies (SISSA), Trieste, Italy.

^ac: Also at Department of Physics and Astronomy, University of South Carolina, Columbia, SC, United States.

^ad: Also at School of Physics and Engineering, Sun Yat-sen University, Guangzhou, China.

^ae: Also at Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia.

^af: Also at National Research Nuclear University MEPhI, Moscow, Russia.

^ag: Also at Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Budapest, Hungary.

^ah: Also at Department of Physics, Oxford University, Oxford, United Kingdom.

^ai: Also at Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany.

^aj: Also at Department of Physics, The University of Michigan, Ann Arbor, MI, United States.

^ak: Also at Discipline of Physics, University of KwaZulu-Natal, Durban, South Africa.

^al: Also at University of Malaya, Department of Physics, Kuala Lumpur, Malaysia.

^⁎: Deceased.

^⋆: E-mail address: [email protected].

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