Search for new phenomena in high-mass diphoton final states using 37 fb−1 of proton–proton collisions collected at s=13TeV with the ATLAS detector

doi:10.1016/j.physletb.2017.10.039

Physics Letters B

Volume 775, 10 December 2017, Pages 105-125

https://doi.org/10.1016/j.physletb.2017.10.039 Get rights and content

Under a Creative Commons license

open access

Abstract

Searches for new phenomena in high-mass diphoton final states with the ATLAS experiment at the LHC are presented. The analysis is based on pp collision data corresponding to an integrated luminosity of 36.7 fb⁻¹ at a centre-of-mass energy $\sqrt{s} = 13 TeV$ recorded in 2015 and 2016. Searches are performed for resonances with spin 0, as predicted by theories with an extended Higgs sector, and for resonances with spin 2, using a warped extra-dimension model as a benchmark model, as well as for non-resonant signals, assuming a large extra-dimension scenario. No significant deviation from the Standard Model is observed. Upper limits are placed on the production cross section times branching ratio to two photons as a function of the resonance mass. In addition, lower limits are set on the ultraviolet cutoff scale in the large extra-dimensions model.

Cited by (0)

^ay: Also at PKU-CHEP.

^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 TRIUMF, Vancouver BC, Canada.

^e: Also at Department of Physics & Astronomy, University of Louisville, Louisville, KY, United States of America.

^f: Also at Physics Department, An-Najah National University, Nablus, Palestine.

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

^h: Also at Department of Physics, University of Fribourg, Fribourg, Switzerland.

ⁱ: Also at II Physikalisches Institut, Georg-August-Universität, Göttingen, Germany.

^j: Also at Departament de Fisica de la Universitat Autonoma de Barcelona, Barcelona, Spain.

^k: Also at Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Portugal.

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

^m: Also at The Collaborative Innovation Center of Quantum Matter (CICQM), Beijing, China.

ⁿ: Also at Universita di Napoli Parthenope, Napoli, Italy.

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

^p: Also at Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania.

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

^r: Also at Borough of Manhattan Community College, City University of New York, New York City, United States of America.

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

^t: Also at Centre for High Performance Computing, CSIR Campus, Rosebank, Cape Town, South Africa.

^u: Also at Louisiana Tech University, Ruston LA, United States of America.

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

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

^x: Also at Graduate School of Science, Osaka University, Osaka, Japan.

^y: Also at Fakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg, Germany.

^z: Also at Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen, Netherlands.

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

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

^ac: Also at CERN, Geneva, Switzerland.

^ad: Also at Georgian Technical University (GTU), Tbilisi, Georgia.

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

^af: Also at Manhattan College, New York NY, United States of America.

^ag: Also at The City College of New York, New York NY, United States of America.

^ah: Also at Departamento de Fisica Teorica y del Cosmos, Universidad de Granada, Granada, Portugal.

^ai: Also at Department of Physics, California State University, Sacramento CA, United States of America.

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

^ak: Also at Departement de Physique Nucleaire et Corpusculaire, Université de Genève, Geneva, Switzerland.

^al: Also at Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Barcelona, Spain.

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

^an: Also at Institute for Nuclear Research and Nuclear Energy (INRNE) of the Bulgarian Academy of Sciences, Sofia, Bulgaria.

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

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

^aq: Also at Department of Physics, Stanford University, Stanford CA, United States of America.

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

^as: Also at Giresun University, Faculty of Engineering, Turkey.

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

^au: Also at Department of Physics, Nanjing University, Jiangsu, China.

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

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

^ax: Also at LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France.

^⁎: Deceased.

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