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Search for four-top-quark production in the single-lepton and opposite-sign dilepton final states in pp collisions at s=13 TeV with the ATLAS detector

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 26 Mar 2019Embargo end date: 03 Jun 2020 Italy, Chile, Italy, United Kingdom, Sweden, Spain, France, Italy, Australia, Italy, United States, Germany, Norway, Germany, Italy, China (People's Republic of), Italy, Turkey, Denmark, South Africa, Poland, Italy, United States, Spain, Italy, Turkey, China (People's Republic of), Netherlands, Italy, Turkey, Spain, Belarus, United Kingdom, United Kingdom, Netherlands, Italy, United Kingdom, Italy, Italy, Spain, Netherlands, Netherlands, Italy, Switzerland, Norway, Turkey, Italy Publisher:American Physical Society (APS)Journal:Physical Review D, volume 99 (issn: 2470-0010, eissn: 2470-0029,

Authors: James Black; Andy Parker; Ren-Jie Wang; Lukas Heinrich; Petr Gallus; Gabija Zemaityte; Lara Hannan Mason; +193 Authors

James Black; Andy Parker; Ren-Jie Wang; Lukas Heinrich; Petr Gallus; Gabija Zemaityte; Lara Hannan Mason; Barry King; Bruce Yabsley; Antonio Miucci; Alexandra Tudorache; Andrew Blue; Simone Monzani; Thu Pham; Alessandro De Salvo; Nedaa Asbah; Joseph Stanford Ennis; Jonathan David Bossio Sola; Anna Kaczmarska; Norman Gee; HT Yang; Jeffrey Tseng; Eleni Mountricha; Steffen Staerz; Graham Richard Lee; Mark Hodgkinson; Matthew Henry Klein; George Redlinger; Patrick Rieck; Marisilvia Donadelli; Reisaburo Tanaka; Vasiliki A Mitsou; Ryunosuke Iguchi; Teresa Lenz; Ewa Stanecka; Bojan Hiti; Reiner Hauser; Christoph Rembser; Simon Schmitz; Meisam Ghasemi Bostanabad; Alexey Boldyrev; Cherifa Sabrina Amrouche; Maria Ines Abreu Juliao Ochoa De Castro; Matteo Franchini; Yohei Yamaguchi; Andrea Ventura; Nikolai Fomin; Dominic Hirschbuehl; Ladislav Chytka; Andrea Sansoni; Steven Errede; John Parsons; Karl Gellerstedt; Peyton Rose; Ricardo Piegaia; Andrea Negri; Tatsumi Nitta; Ralf Hertenberger; Michael Adersberger; Arno Straessner; Yann Coadou; Konstantin Zhukov; Kazuhiko Hara; J. N. Butler; Kate Shaw; Nikiforos Nikiforou; Stefania Xella; Elizabeth Gallas; Loic Valery; James Mueller; Maria Del Mar Capeans Garrido; Fabio Cerutti; Vincenzo Cavasinni; Ilkay Turk Cakir; Edoardo Maria Farina; Isabel Nitsche; Teresa Barillari; S. Passaggio; Ossama AbouZeid; Wolfgang Walkowiak; Enrico Pasqualucci; Jared David Little; Herman Ten Kate; Yun Sang Chow; Antonio Policicchio; Alvaro Lopez Solis; Yuri Kulchitsky; Bo Liu; Torre Wenaus; Dave Charlton; Ishan Pokharel; Hidetoshi Otono; Christophe Clement; Sven Menke; Volker Buescher; Barbara Liberti; Claudia Glasman; Julian Glatzer; Ben William Whitmore; Klaudia Burka; Nooshin Dehghanian; Theodoros Alexopoulos; Filippo Ceradini; Olivier Le Dortz; Yoshiji Yasu; Theo Jean Megy; Ksenia Gasnikova; Benjamin Philip Nachman; Jiri Kvita; Ilya Korolkov; Juansher Jejelava; Wenhao Xu; Laurent Vacavant; Antonio Zoccoli; Piotr Andrzej Janus; Attila Krasznahorkay; Sinan Kuday; Claire Bourdarios; Antonio De Maria; Giuseppe Mornacchi; Elisabeth Petit; Aziz Chafaq; Riccardo Vari; Philipp Mogg; Djamel Eddine Boumediene; Hugh Williams; Alan Peyaud; Bruno Mansoulie; Mohamed Ouchrif; David Berge; Ahmed Tarek Abouelfadl Mohamed; Tim Martin; Minyu Feng; Pawel Malecki; Marianna Testa; João Barreiro Guimarães da Costa; Francesca Ungaro; Driss Benchekroun; Jahred Adelman; David Paul Yallup; John Kenneth Anders; Tobias Kupfer; Siarhei Harkusha; James Proudfoot; Andrew Buckley; Zach Marshall; Dimitrios Fassouliotis; Maarten Boonekamp; Alfred Goshaw; Annabelle Julia Chuinard; Robert Keyes; Claudio Ferretti; Weimin Song; Yang Gao; Yang Liu; Gregor Kramberger; Hernan Wahlberg; Feng Lyu; James Boyd; Victoria Castillo Gimenez; Christian Gutschow; Santiago González de la Hoz; Jacob Henry Rawling; Swagato Banerjee; Thibault Guillemin; Laurence Anthony Spiller; Steven Worm; Matthew Gignac; Vadim Kostyukhin; Francesco Lo Sterzo; Rachik Soualah; Guenter Duckeck; Thilo Pauly; Jason Tylor Colt Barkeloo; Xanthe Hoad; Jean-Pierre Meyer; Jakub Andrzej Kremer; Alexey Myagkov; Monica Dobre; Sergii Raspopov; Denis Salihagic; Michael Schernau; Christian Oliver Sander; Chrysostomos Valderanis; James Chapman; Peter Hansen; Michal Svatos; Anne-Isabelle Etienvre; Tiago Dias Do Vale; Philip Sommer; Tadashi Maeno; Ulf Fredrik Mikael Martensson; Carlo Enrico Pandini; Geoffrey Mullier; Katharine Leney; Bin Gui; Mykhailo Lisovyi; Robert Richter; Cristian Stanescu; Giuliano Gustavino;

doi: 10.1103/physrevd.99.052009 , 10.17863/cam.53166 , 10.48550/arxiv.1811.02305

arXiv: http://arxiv.org/abs/1811.02305

Search for four-top-quark production in the single-lepton and opposite-sign dilepton final states in pp collisions at s=13 TeV with the ATLAS detector

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Abstract

A search for four-top-quark production, $t\bar{t}t\bar{t}$, is presented. It is based on proton-proton collision data with a center-of-mass energy $\sqrt{s}$ = 13 TeV collected by the ATLAS detector at the Large Hadron Collider during the year 2015 and 2016, corresponding to an integrated luminosity of $36.1$ fb$^{-1}$. Data are analyzed in both the single-lepton and opposite-sign dilepton channels, characterized by the presence of one or two isolated electrons or muons with high-transverse momentum and multiple jets. A data-driven method is used to estimate the dominant background from top-quark pair production in association with jets. No significant excess above the Standard Model expectation is observed. The result is combined with the previous same-sign dilepton and multilepton searches carried out by ATLAS and an observed (expected) upper limit of 5.3 (2.1) times the four-top-quark Standard Model cross section is obtained at 95% confidence level. Additionally, upper limit on anomalous four-top-quark production cross section is set in the context of an effective field theory model.

Countries

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

Related Organizations

Grenoble Alpes University
France
New York University
United States
Roma Tre University
Italy
University of Trento
Italy
National Institute for Nuclear Physics
Italy

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Keywords

electron, Physics and Astronomy (miscellaneous), 13000 GeV-cms, channel cross section: upper limit, High Energy Physics - Experiment, Subatomär fysik, High Energy Physics - Experiment (hep-ex), effective field theory, Hadron colliders; boson production; pair-production; cross-section; plus plus; top; breaking; physics; gluon; LHC, Subatomic Physics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Particle Physics Experiments, Collisions , HADRON COLLIDERS, info:eu-repo/classification/ddc/530, QC, proton–proton collisions, dilepton: same sign, Q007D13, VDP::Kjerne- og elementærpartikkelfysikk: 431, Particle and High Energy Physics, ATLAS, Nuclear and Plasma Physics, Settore FIS/01 - FISICA SPERIMENTALE, :Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431 [VDP], CERN LHC Coll, Physical Sciences, top: multiple production, LHC, top: pair production, p p: scattering, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], VDP::Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431, final state: ((n)jet lepton), FOS: Physical sciences, LHC, ATLAS, High Energy Physics, 530, info:eu-repo/classification/ddc/500.2, HADRON COLLIDERS; BOSON PRODUCTION; PAIR-PRODUCTION; CROSS-SECTION; PLUS; PLUS; TOP; BREAKING; PHYSICS; GLUON; LHC, muon, High Energy Physics, ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика, BOSON PRODUCTION, VDP::Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431, final state: ((n)jet dilepton), background, hep-ex, :Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431 [VDP], 500, Física, jets , Experimental High Energy Physics, Hadron-hadron collisions ; top quark, p p: colliding beams, experimental results, ddc: ddc:500.2

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