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Combined searches for the production of supersymmetric top quark partners in proton–proton collisions at √s=13Te

Combined searches for the production of supersymmetric top quark partners in proton–proton collisions at √s=13Te
Combined searches for the production of supersymmetric top quark partners in proton–proton collisions at √s=13Te
A combination of searches for top squark pair production using proton–proton collision data at a center-of-mass energy of 13TeV at the CERN LHC, corresponding to an integrated luminosity of 137fb−1 collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on the model, the combined result excludes a top squark mass up to 1325GeV for a massless neutralino, and a neutralino mass up to 700GeV for a top squark mass of 1150GeV. Top squarks with masses from 145 to 295GeV, for neutralino masses from 0 to 100GeV, with a mass difference between the top squark and the neutralino in a window of 30GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420GeV.
Tumasyan, Armen
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Adam, Wolfgang
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Andrejkovic, Janik Walter
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Bergauer, Thomas
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Chatterjee, Suman
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Dragicevic, Marko
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Valle, Alberto Escalante del
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Fruehwirth, Rudolf
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Jeitler, Manfred
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Krammer, Natascha
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Lechner, Lukas
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Liko, Dietrich
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Mikulec, Ivan
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Paulitsch, Peter
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Pitters, Florian Michael
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Schieck, Jochen
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Robert, Schoefbeck
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Spanring, Markus
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Templ, Sebastian
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Waltenberger, Wolfgang
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Wulz, Claudia-Elisabeth
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Chekhovsky, Vladimir
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Litomin, Aliaksandr
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Makarenko, Vladimir
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Darwish, Mohamed Rashad
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De Wolf, Eddi A
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Janssen, Tahys
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Janssen, Tahys
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Kello, Tomas
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Lelek, Aleksandra
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Rejeb Sfar, Haifa
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Van Mechelen, Pierre
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Van Putte, Senne
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Remortel, Nick van
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Blekman, Freya
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Bols, Emil Sørensen
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D'Hondt, Jorgen
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Clercq, Jarne De
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Wang, Yi
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Wang, Jin
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Chen, Cheng
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Kasem, A.
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Aggleton, Robin
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Kumar, Deepak
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Kim, Jae Sung
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Kim, S.
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Lee, Jason Sang Hun
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Lee, Y
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Yang, S
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James, Thomas
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Belyaev, Alexander
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The CMS Collaboration
Tumasyan, Armen
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Adam, Wolfgang
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Andrejkovic, Janik Walter
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Bergauer, Thomas
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Chatterjee, Suman
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Dragicevic, Marko
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Valle, Alberto Escalante del
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Fruehwirth, Rudolf
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Jeitler, Manfred
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Krammer, Natascha
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Lechner, Lukas
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Liko, Dietrich
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Mikulec, Ivan
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Paulitsch, Peter
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Pitters, Florian Michael
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Schieck, Jochen
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Robert, Schoefbeck
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Spanring, Markus
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Templ, Sebastian
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Waltenberger, Wolfgang
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Wulz, Claudia-Elisabeth
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Chekhovsky, Vladimir
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Litomin, Aliaksandr
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Makarenko, Vladimir
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Darwish, Mohamed Rashad
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De Wolf, Eddi A
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Janssen, Tahys
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Janssen, Tahys
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Kello, Tomas
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Lelek, Aleksandra
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Rejeb Sfar, Haifa
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Van Mechelen, Pierre
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Van Putte, Senne
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Remortel, Nick van
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Blekman, Freya
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Bols, Emil Sørensen
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D'Hondt, Jorgen
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Clercq, Jarne De
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Wang, Yi
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Wang, Jin
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Chen, Cheng
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Kasem, A.
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Aggleton, Robin
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Kumar, Deepak
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Kim, Jae Sung
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Kim, S.
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Lee, Jason Sang Hun
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Lee, Y
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Yang, S
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James, Thomas
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Belyaev, Alexander
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Belyaev, Alexander , The CMS Collaboration (2021) Combined searches for the production of supersymmetric top quark partners in proton–proton collisions at √s=13Te. The European Physical Journal C, 81 (11), [970]. (doi:10.1140/epjc/s10052-021-09721-5).

Record type: Article

Abstract

A combination of searches for top squark pair production using proton–proton collision data at a center-of-mass energy of 13TeV at the CERN LHC, corresponding to an integrated luminosity of 137fb−1 collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on the model, the combined result excludes a top squark mass up to 1325GeV for a massless neutralino, and a neutralino mass up to 700GeV for a top squark mass of 1150GeV. Top squarks with masses from 145 to 295GeV, for neutralino masses from 0 to 100GeV, with a mass difference between the top squark and the neutralino in a window of 30GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420GeV.

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Published date: 3 November 2021
Additional Information: Funding Information: We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid and other centers for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC, the CMS detector, and the supporting computing infrastructure provided by the following funding agencies: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); MINCIENCIAS (Colombia); MSES and CSF (Croatia); RIF (Cyprus); SENESCYT (Ecuador); MoER, ERC PUT and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR, and NRC KI (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI, and FEDER (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Funding Information: Individuals have received support from the Marie-Curie program and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 724704, 752730, 758316, 765710, 824093, and COST Action CA16108 (European Union); the Leventis Foundation; the Alfred P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the “Excellence of Science – EOS” – be.h project n. 30820817; the Beijing Municipal Science & Technology Commission, No. Z191100007219010; the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Deutsche Forschungsgemeinschaft (DFG), under Germany’s Excellence Strategy – EXC 2121 “Quantum Universe” – 390833306, and under project number 400140256 - GRK2497; the Lendület (“Momentum”) Program and the János Bolyai Research Scholarship of the Hungarian Academy of Sciences, the New National Excellence Program ÚNKP, the NKFIA research grants 123842, 123959, 124845, 124850, 125105, 128713, 128786, and 129058 (Hungary); the Council of Science and Industrial Research, India; the Latvian Council of Science; the Ministry of Science and Higher Education and the National Science Center, contracts Opus 2014/15/B/ST2/03998 and 2015/19/B/ST2/02861 (Poland); the National Priorities Research Program by Qatar National Research Fund; the Ministry of Science and Higher Education, project no. 0723-2020-0041 (Russia); the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias; the Stavros Niarchos Foundation (Greece); the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); the Kavli Foundation; the Nvidia Corporation; the SuperMicro Corporation; the Welch Foundation, contract C-1845; and the Weston Havens Foundation (USA). Publisher Copyright: © 2021, The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

Identifiers

Local EPrints ID: 452341
URI: http://eprints.soton.ac.uk/id/eprint/452341
PURE UUID: 79c33790-a8f2-4158-8f36-3f83d5ebd121
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 08 Dec 2021 18:44
Last modified: 09 Jan 2022 03:25

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Contributors

Author: Armen Tumasyan
Author: Wolfgang Adam
Author: Janik Walter Andrejkovic
Author: Thomas Bergauer
Author: Suman Chatterjee
Author: Marko Dragicevic
Author: Alberto Escalante del Valle
Author: Rudolf Fruehwirth
Author: Manfred Jeitler
Author: Natascha Krammer
Author: Lukas Lechner
Author: Dietrich Liko
Author: Ivan Mikulec
Author: Peter Paulitsch
Author: Florian Michael Pitters
Author: Jochen Schieck
Author: Schoefbeck Robert
Author: Markus Spanring
Author: Sebastian Templ
Author: Wolfgang Waltenberger
Author: Claudia-Elisabeth Wulz
Author: Vladimir Chekhovsky
Author: Aliaksandr Litomin
Author: Vladimir Makarenko
Author: Mohamed Rashad Darwish
Author: Eddi A De Wolf
Author: Tahys Janssen
Author: Tahys Janssen
Author: Tomas Kello
Author: Aleksandra Lelek
Author: Haifa Rejeb Sfar
Author: Pierre Van Mechelen
Author: Senne Van Putte
Author: Nick van Remortel
Author: Freya Blekman
Author: Emil Sørensen Bols
Author: Jorgen D'Hondt
Author: Jarne De Clercq
Author: Yi Wang
Author: Jin Wang
Author: Cheng Chen
Author: A. Kasem
Author: Robin Aggleton
Author: Deepak Kumar
Author: Jae Sung Kim
Author: S. Kim
Author: Jason Sang Hun Lee
Author: Y Lee
Author: S Yang
Author: Thomas James
Corporate Author: The CMS Collaboration

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