Search for resonances in diphoton events at s = 13 $$ \sqrt{s}=13 $$ TeV with the ATLAS detector
M. AaboudFaculté des Sciences, Université Mohamed Premier and LPTPM, Oujda, MoroccoG. AadCPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, FranceBraden Keim AbbottHomer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, United States of AmericaJ. AbdallahUniversity of Iowa, Iowa City, IA, United States of AmericaO. AbdinovInstitute of Physics, Azerbaijan Academy of Sciences, Baku, AzerbaijanB. AbeloosLAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, FranceR. AbenNikhef National Institute for Subatomic Physics and University of Amsterdam, Amsterdam, NetherlandsO. S. AbouZeidSanta Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz, CA, United States of AmericaN. L. AbrahamDepartment of Physics and Astronomy, University of Sussex, Brighton, United KingdomH. AbramowiczRaymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, IsraelH. AbreuDepartment of Physics, Technion: Israel Institute of Technology, Haifa, IsraelR. AbreuCenter for High Energy Physics, University of Oregon, Eugene, OR, United States of AmericaY. AbulaitiDepartment of Physics, Stockholm University, Stockholm, SwedenB. S. AcharyaINFN Gruppo Collegato di Udine, Sezione di Trieste, Udine, ItalyL. AdamczykAGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, PolandD. L. AdamsPhysics Department, Brookhaven National Laboratory, Upton, NY, United States of AmericaJahred AdelmanDepartment of Physics, Northern Illinois University, DeKalb, IL, United States of AmericaS. AdomeitFakultät für Physik, Ludwig-Maximilians-Universität München, München, GermanyTim AdyeParticle Physics Department, Rutherford Appleton Laboratory, Didcot, United KingdomTony AffolderOliver Lodge Laboratory, University of Liverpool, Liverpool, United KingdomT. Agatonović-JovinInstitute of Physics, University of Belgrade, Belgrade, SerbiaJ. AgricolaII Physikalisches Institut, Georg-August-Universität, Göttingen, GermanyJ. A. Aguilar–SaavedraLaboratório de Instrumentação e Física Experimental de Partículas - LIP, Lisboa, PortugalS. AhlenDepartment of Physics, Boston University, Boston, MA, United States of AmericaF. AhmadovInstitute of Physics, Azerbaijan Academy of Sciences, Baku, AzerbaijanGiulio AielliINFN Sezione di Roma Tor Vergata, Roma, ItalyH. ÅkerstedtDepartment of Physics, Stockholm University, Stockholm, SwedenTorsten AkessonFysiska institutionen, Lunds universitet, Lund, SwedenAndrei AkimovP.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, RussiaGian Luigi AlberghiINFN Sezione di Bologna, Bologna, ItalyJ. AlbertDepartment of Physics and Astronomy, University of Victoria, Victoria, BC, CanadaS. AlbrandLaboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, FranceM. J. Alconada VerziniInstituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, ArgentinaMartin AleksaCERN, Geneva, SwitzerlandI. N. AleksandrovJoint Institute for Nuclear Research, JINR Dubna, Dubna, RussiaC. AlexaG. AlexanderRaymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, IsraelT. AlexopoulosPhysics Department, National Technical University of Athens, Zografou, GreeceMuhammad AlhroobHomer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, United States of AmericaBabar AliII Physikalisches Institut, Georg-August-Universität, Göttingen, GermanyM. AlievINFN Sezione di Lecce, Lecce, ItalyGianluca AlimontiINFN Sezione di Milano, Milano, ItalyJ. AlisonEnrico Fermi Institute, University of Chicago, Chicago, IL, United States of AmericaS. P. AlkireNevis Laboratory, Columbia University, Irvington, NY, United States of AmericaBenedict AllbrookeDepartment of Physics and Astronomy, University of Sussex, Brighton, United KingdomB. W. AllenCenter for High Energy Physics, University of Oregon, Eugene, OR, United States of AmericaPhilip Patrick AllportSchool of Physics and Astronomy, University of Birmingham, Birmingham, United KingdomA. AloisioINFN Sezione di Napoli, Napoli, ItalyA. AlonsoNiels Bohr Institute, University of Copenhagen, Kobenhavn, DenmarkF. AlonsoInstituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, ArgentinaCristiano AlpigianiDepartment of Physics, University of Washington, Seattle, WA, United States of AmericaM. I. AlstatyCPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, FranceB. Álvarez GonzálezCERN, Geneva, SwitzerlandD. Álvarez PiquerasInstituto de Fisica Corpuscular (IFIC) and Departamento de Fisica Atomica, Molecular y Nuclear and Departamento de Ingeniería Electrónica and Instituto de Microelectrónica de Barcelona (IMB-CNM), University of Valencia and CSIC, Valencia, SpainMariagrazia AlviggiINFN Sezione di Napoli, Napoli, ItalyB. T. AmadioPhysics Division, Lawrence Berkeley National Laboratory and University of California, Berkeley, CA, United States of AmericaK. AmakoKEK, High Energy Accelerator Research Organization, Tsukuba, JapanY. Amaral CoutinhoUniversidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro, BrazilC. AmelungDepartment of Physics, Brandeis University, Waltham, MA, United States of AmericaDante AmideiDepartment of Physics, The University of Michigan, Ann Arbor, MI, United States of AmericaS. P. Amor Dos SantosLaboratório de Instrumentação e Física Experimental de Partículas - LIP, Lisboa, PortugalA. AmorimLaboratório de Instrumentação e Física Experimental de Partículas - LIP, Lisboa, PortugalS. AmorosoCERN, Geneva, SwitzerlandG. AmundsenDepartment of Physics, Brandeis University, Waltham, MA, United States of AmericaChristos AnastopoulosDepartment of Physics and Astronomy, University of Sheffield, Sheffield, United KingdomL. S. AncuSection de Physique, Université de Genève, Geneva, SwitzerlandN. AndariSchool of Physics and Astronomy, University of Birmingham, Birmingham, United KingdomT. AndeenDepartment of Physics, The University of Texas at Austin, Austin, TX, United States of AmericaC. F. AndersPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyJohn Kenneth AndersOliver Lodge Laboratory, University of Liverpool, Liverpool, United KingdomK. J. AndersonEnrico Fermi Institute, University of Chicago, Chicago, IL, United States of AmericaA. AndreazzaINFN Sezione di Milano, Milano, ItalyV. AndreiKirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyS. AngelidakisPhysics Department, University of Athens, Athens, GreeceI. AngelozziNikhef National Institute for Subatomic Physics and University of Amsterdam, Amsterdam, NetherlandsP. AngerInstitut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden, GermanyAaron AngeramiNevis Laboratory, Columbia University, Irvington, NY, United States of AmericaF. AnghinolfiCERN, Geneva, SwitzerlandAlexey AnisenkovBudker Institute of Nuclear Physics, SB RAS, Novosibirsk, RussiaN. AnjosInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Barcelona, SpainAlberto AnnoviINFN Sezione di Pisa, Pisa, ItalyC. AntelKirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyM. AntonelliINFN Laboratori Nazionali di Frascati, Frascati, ItalyА. АнтоновNational Research Nuclear University MEPhI, Moscow, RussiaFabio AnulliINFN Sezione di Roma, Roma, ItalyMasato AokiKEK, High Energy Accelerator Research Organization, Tsukuba, JapanL. Aperio BellaSchool of Physics and Astronomy, University of Birmingham, Birmingham, United KingdomG. ArabidzeDepartment of Physics and Astronomy, Michigan State University, East Lansing, MI, United States of AmericaY. AraiKEK, High Energy Accelerator Research Organization, Tsukuba, JapanJ. P. AraqueLaboratório de Instrumentação e Física Experimental de Partículas - LIP, Lisboa, PortugalA. T. H. ArceDepartment of Physics, Duke University, Durham, NC, United States of AmericaF. A. ArduhInstituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, ArgentinaJ-F. ArguinGroup of Particle Physics, University of Montreal, Montreal, QC, CanadaS. ArgyropoulosUniversity of Iowa, Iowa City, IA, United States of AmericaM. ArikDepartment of Physics, Bogazici University, Istanbul, TurkeyA. J. ArmbrusterSLAC National Accelerator Laboratory, Stanford, CA, United States of AmericaL. J. ArmitageSchool of Physics and Astronomy, Queen Mary University of London, London, United KingdomO. ArnaezCERN, Geneva, SwitzerlandH. ArnoldFakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg, Germany
2016en
ABI
Аннотация
Searches for new resonances decaying into two photons in the ATLAS experiment at the CERN Large Hadron Collider are described. The analysis is based on protonproton collision data corresponding to an integrated luminosity of 3.2 fb -1 at s = 13 TeV recorded in 2015. Two searches are performed, one targeted at a spin-2 particle of mass larger than 500 GeV, using Randall-Sundrum graviton states as a benchmark model, and one optimized for a spin-0 particle of mass larger than 200 GeV. Varying both the mass and the decay width, the most significant deviation from the background-only hypothesis is observed at a diphoton invariant mass around 750 GeV with local significances of 3.8 and 3.9 standard deviations in the searches optimized for a spin-2 and spin-0 particle, respectively. The global significances are estimated to be 2.1 standard deviations for both analyses. The consistency between the data collected at 13 TeV and 8 TeV is also evaluated. Limits on the production cross section times branching ratio to two photons for the two resonance types are reported.
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