Search for light long-lived neutral particles produced in pp collisions at $$\sqrt{s} = 13~\mathrm {TeV}$$ and decaying into collimated leptons or light hadrons with the ATLAS detector

descriptionPublicationkeyboard_double_arrow_right Article , Research , Preprint , Other literature type 01 May 2020Embargo end date: 04 Jul 2020 Norway, Netherlands, Turkey, Chile, Norway, Australia, Austria, Italy, Italy, Turkey, Italy, Italy, Poland, Czech Republic, Belarus, Portugal, Netherlands, Italy, South Africa, Spain, Italy, Netherlands, Denmark, Germany, Australia, Turkey, Italy, Netherlands, Spain, Sweden, Spain, United Kingdom, United Kingdom, China (People's Republic of), United States, Germany, Italy, France, Germany, China (People's Republic of), China (People's Republic of), Italy, Italy, Turkey, Italy, Italy, Switzerland, Italy, Italy English Publisher:Springer Science and Business Media LLCJournal:The European Physical Journal C, volume 80 (issn: 1434-6044, eissn: 1434-6052,

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Authors: Aad, Georges; Abbott, Brad; Abreu, Henso; Arcangeletti, Chiara; Hadavand, Haleh Khani; Haddad, Nacim; Hadef, Asma; +193 Authors

Aad, Georges; Abbott, Brad; Abreu, Henso; Arcangeletti, Chiara; Hadavand, Haleh Khani; Haddad, Nacim; Hadef, Asma; Hageboeck, Stephan; Haleem, Mahsana; Haley, Joseph; Halladjian, Garabed; Hallewell, Gregory David; Hamacher, Klaus; Hamal, Petr; Arce, Ayana; Hamano, Kenji; Hamdaoui, Hassane; Hamity, Guillermo Nicolas; Han, Kunlin; Han, Liang; Han, Shuo; Han, Yi Fei; Hanagaki, Kazunori; Hance, Michael; Handl, David Michael; Arduh, Francisco Anuar; Haney, Bijan; Hankache, Robert; Hansen, Eva; Hansen, Jorgen Beck; Hansen, Jorn Dines; Hansen, Maike Christina; Hansen, Peter Henrik; Hanson, Emily Claire; Hara, Kazuhiko; Hard, Andrew Straiton; Arguin, Jean-Francois; Harenberg, Torsten; Harkusha, Siarhei; Harrison, Paul Fraser; Hartmann, Nikolai Marcel; Hasegawa, Yoji; Hasib, Ahmed; Hassani, Samira; Haug, Sigve; Hauser, Reiner; Havener, Laura Brittany; Argyropoulos, Spyridon; Havranek, Miroslav; Hawkes, Christopher; Hawkings, Richard; Hayden, Daniel; Hayes, Christopher; Hayes, Robin Leigh; Hays, Chris; Hays, Jonathan Michael; Hayward, Helen; Haywood, Stephen; Arling, Jan-Hendrik; He, Fudong; Heath, Matthew Peter; Hedberg, Vincent; Heelan, Louise; Heer, Sebastian; Heidegger, Kim Katrin; Heidorn, William Dale; Heilman, Jesse; Heim, Sarah; Heim, Timon Frank-thomas; Armbruster, Aaron James; Heinemann, Beate; Heinrich, Jochen Jens; Heinrich, Lukas; Heinz, Christian; Hejbal, Jiri; Helary, Louis; Held, Alexander; Hellesund, Simen; Helling, Cole Michael; Hellman, Sten; Armstrong, Alexander III; Helsens, Clement; Henderson, Robert; Heng, Yang; Henkelmann, Steffen; Henriques Correia, Ana Maria; Herbert, Geoffrey Henry; Herde, Hannah; Herget, Verena; Hernandez Jimenez, Yesenia; Herr, Holger; Arnaez, Olivier; Herrmann, Maximilian Georg; Herrmann, Tim; Herten, Gregor; Hertenberger, Ralf; Hervas, Luis; Herwig, Theodor Christian; Hesketh, Gavin Grant; Hessey, Nigel; Higashida, Akihiro; Higashino, Satoshi; Arnold, Hannah; Higon-Rodriguez, Emilio; Hildebrand, Kevin; Hill, Ewan; Hill, John; Hill, Kurt Keys; Hiller, Karl Heinz; Hillier, Stephen; Hils, Maximilian; Hinchliffe, Ian; Hinterkeuser, Florian; Abulaiti, Yiming; Artamonov, Andrei; Hirose, Minoru; Hirose, Shigeki; Hirschbuehl, Dominic; Hiti, Bojan; Hladik, Ondrej; Hlaluku, Dingane Reward; Hoad, Xanthe; Hobbs, John; Hod, Noam; Hodgkinson, Mark; Artoni, Giacomo; Hoecker, Andreas; Hoenig, Friedrich; Hohn, David; Hohov, Dmytro; Holmes, Tova Ray; Holzbock, Michael; Hommels, Bart; Honda, Shunsuke; Hong, Tae Min; Honle, Andreas; Artz, Sebastian; Hooberman, Benjamin Henry; Hopkins, Walter Howard; Horii, Yasuyuki; Horn, Philipp; Horyn, Lesya Anna; Hou, Suen; Hoummada, Abdeslam; Howarth, James; Hoya, Joaquin; Hrabovsky, Miroslav; Asai, Shoji; Hrdinka, Julia; Hristova, Ivana; Hrivnac, Julius; Hrynevich, Aliaksei; Hryn'ova, Tetiana; Hsu, Pai-hsien Jennifer; Hsu, Shih-Chieh; Hu, Qipeng; Hu, Shuyang; Huang, Dan Ping; Asbah, Nedaa; Huang, Yicong; Huang, Yanping; Hubacek, Zdenek; Hubaut, Fabrice; Huebner, Michael; Huegging, Fabian; Huffman, Todd Brian; Huhtinen, Mika; Hunter, Robert Francis; Huo, Peng; Asimakopoulou, Eleni Myrto; Hupe, Andre Marc; Huseynov, Nazim; Huston, Joey; Huth, John; Hyneman, Rachel; Hyrych, Sofiia; Iacobucci, Giuseppe; Iakovidis, Georgios; Ibragimov, Iskander; Iconomidou-Fayard, Lydia; Asquith, Lily; Idrissi, Zineb; Iengo, Paolo; Ignazzi, Rosanna; Igonkina, Olga; Iguchi, Ryunosuke; Iizawa, Tomoya; Ikegami, Yoichi; Ikeno, Masahiro; Iliadis, Dimitrios; Ilic, Nikolina; Assahsah, Jihad; Iltzsche Speiser, Franziska; Introzzi, Gianluca; Iodice, Mauro; Iordanidou, Kalliopi; Ippolito, Valerio; Isacson, Max Fredrik; Ishino, Masaya; Islam, Wasikul;

doi: 10.1140/epjc/s10052-020-7997-4 , 10.17863/cam.54699 , 10.17863/cam.70202 , 10.3204/pubdb-2020-02609 , 10.3204/pubdb-2019-05168 , 10.17863/cam.53058 , 10.17863/cam.53605 , 10.48550/arxiv.1909.01246 , 10.17863/cam.54286

arXiv: 1909.01246

Search for light long-lived neutral particles produced in pp collisions at $$\sqrt{s} = 13~\mathrm {TeV}$$ and decaying into collimated leptons or light hadrons with the ATLAS detector

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Abstract

AbstractSeveral models of physics beyond the Standard Model predict the existence of dark photons, light neutral particles decaying into collimated leptons or light hadrons. This paper presents a search for long-lived dark photons produced from the decay of a Higgs boson or a heavy scalar boson and decaying into displaced collimated Standard Model fermions. The search uses data corresponding to an integrated luminosity of 36.1 fb$$^{-1}$$-1 collected in proton–proton collisions at $$\sqrt{s} = 13$$s=13 $$\text {Te}\text {V}$$Te recorded in 2015–2016 with the ATLAS detector at the Large Hadron Collider. The observed number of events is consistent with the expected background, and limits on the production cross section times branching fraction as a function of the proper decay length of the dark photon are reported. A cross section times branching fraction above 4 pb is excluded for a Higgs boson decaying into two dark photons for dark-photon decay lengths between 1.5 mm and 307 mm.

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Norway, Netherlands, Turkey, Chile, Norway, Australia, Austria, Italy, Italy, Turkey, Italy, Italy, Poland, Czech Republic, Belarus, Portugal, Netherlands, Italy, South Africa, Spain, Italy, Netherlands, Denmark, Germany, Australia, Turkey, Italy, Netherlands, Spain, Sweden, Spain, United Kingdom, United Kingdom, China (People's Republic of), United States, Germany, Italy, France, Germany, China (People's Republic of), China (People's Republic of), Italy, Italy, Turkey, Italy, Italy, Switzerland, Italy, Italy

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Keywords

lepton, 13000 GeV-cms, PROTON-PROTON COLLISIONS, Atomic, Subatomär fysik, ЭБ БГУ::ТЕХНИЧЕСКИЕ И ПРИКЛАДНЫЕ НАУКИ. ОТРАСЛИ ЭКОНОМИКИ::Ядерная техника, Particle and Plasma Physics, CERN, Jets, neutral particle: long-lived, 5107 Particle and high energy physics (for-2020), info:eu-repo/classification/ddc/530, 5107 Particle and High Energy Physics (for-2020), new physics, 51 Physical Sciences (for-2020), ddc:530, collimator, Particle physics, VDP::Kjerne- og elementærpartikkelfysikk: 431, Channel cross section: branching ratio: upper limit, Darkness, Settore FIS/01 - FISICA SPERIMENTALE, channel cross section: branching ratio: upper limit, CERN LHC Coll, Physical Sciences, Vector Gauge Boson, 51 Physical Sciences, p p: scattering, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], molecular and optical physics (for-2020), LHC, ATLAS, High Energy Physics, -, Higgs particle, Lepton, Neutral particle: long-lived, High Energy Physics, molecular and optical physics, DARK PHOTON, Proton-Proton Collisions; Higgs-Boson Production; Vector Gauge Boson; Phi-Meson Decays; Parton Distributions; Exclusion Limits; Dark Photon; Forces; Jets; Pair, boson: scalar, photon: hidden sector, Decay: length, Parton Distributions, P p: colliding beams, 500, Molecular, Nuclear & Particles Physics (science-metrix), Missing Mass (Astrophysics), PHI-Meson Decays, Higgs particle: radiative decay, Experimental High Energy Physics, hadron, p p: colliding beams, :Kjerne- og elementærpartikkelfysikk: 431 [VDP], 5106 Nuclear and Plasma Physics (for-2020), Exclusion Limits, Forces, High Energy Physics - Experiment, Higgs-Boson Production, High Energy Physics - Experiment (hep-ex), Phi-Meson Decays, Subatomic Physics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Dark Matter, New physics, Boson: scalar, Photon: hidden sector, Quantum Physics, photon, Particle and High Energy Physics, 0206 Quantum Physics (for), S015XL, Higgs particle: rare decay, ATLAS, Nuclear and Plasma Physics, hidden sector, Nuclear & Particles Physics, :Nuclear and elementary particle physics: 431 [VDP], P p: scattering, VDP::Nuclear and elementary particle physics: 431, LHC, 5107 Particle and High Energy Physics, rare decay, Regular Article - Experimental Physics, PHI-MESON DECAYS, Particle and Plasma Physics (for), FOS: Physical sciences, 535, 530, 5102 Atomic, PAIR, Collimator, VECTOR GAUGE BOSON, 539, Nuclear, Experimental results, High energy physics, ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика, 5101 Astronomical sciences (for-2020), EXCLUSION LIMITS, hep-ex, Dark Photon, background, decay: length, Física, Background, Pair, Hadron, PARTON DISTRIBUTIONS, Proton-Proton Collisions, Astronomical sciences, 0202 Atomic, JETS, HIGGS-BOSON PRODUCTION, 5106 Nuclear and Plasma Physics, FORCES, Hadron-hadron collisions, 500.2, experimental results

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