Search for top squark pair production in compressed-mass-spectrum scenarios in proton-proton collisions at s=8 TeV using the αT variable

CMS Collaboration

doi:10.1016/j.physletb.2017.02.007

Search for top squark pair production in compressed-mass-spectrum scenarios in proton-proton collisions at s=8 TeV using the α_T variable

CMS Collaboration

Fizik Mühendisliği Bölümü

A. Alikhanian Yerevan Institute of Physics
Austrian Academy of Sciences
TU Wien
Belarusian State University
University of Antwerp
Vrije Universiteit Brussel
Université libre de Bruxelles
Peking University
Ghent University
CNRS/IN2P3
Université catholique de Louvain
Universite de Mons
Centro Brasileiro de Pesquisas Físicas
Universidade do Estado do Rio de Janeiro
Universidade Estadual de Campinas
Universidade Estadual Paulista Júlio de Mesquita Filho
Universidade Federal do ABC
Bulgarian Academy of Sciences
Sofia University St. Kliment Ohridski
Beihang University
CAS - Institute of High Energy Physics
Laboratoire Leprince-Ringuet
Universidad de los Andes Colombia
University of Split
Ruder Boskovic Institute
University of Cyprus
Joint Institute for Nuclear Research
Charles University
Universidad San Francisco de Quito
Suez University
Kyungpook National University
Academy of Scientific Research and Technology
Cairo University
Texas A&M University
Mimar Sinan Guzel Sanatlar University
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
Helsinki Institute of Physics
Lappeenranta-Lahti University of Technology
CEA/Saclay
Université de Haute-Alsace
Institut Pluridisciplinaire Hubert Curien
CERN
Universite Claude Bernard Lyon 1
Lomonosov Moscow State University
Ivane Javakhishvili Tbilisi State University
Georgian Technical University
RWTH Aachen University
German Electron Synchrotron
University of Hamburg
Brandenburg University of Technology
Institut für Experimentelle Kernphysik
Demokritos National Centre for Scientific Research
National and Kapodistrian University of Athens
University of Ioannina
Eotvos Lorand University
Wigner Research Centre for Physics
Institute for Nuclear Research
University of Debrecen
Indian Institute of Science Education and Research Bhopal
National Institute of Science Education and Research
Panjab University
University of Delhi
Saha Institute of Nuclear Physics
Homi Bhabha National Institute
Tata Institute of Fundamental Research
Visva-Bharati University
Erzincan University
University of Ruhuna
Indian Institute of Science Education and Research Pune
Institute for Research for Fundamental Sciences
Isfahan University of Technology
University of Tehran
Islamic Azad University
University College Dublin
National Institute for Nuclear Physics
University of Bari
Polytechnic University of Bari
University of Bologna
University of Catania
University of Florence
University of Genoa
University of Milan - Bicocca
University of Basilicata
Università G. Marconi
University of Naples Federico II
University of Padua
Laboratori Nazionali di Legnaro
University of Trento
University of Pavia
University of Perugia
University of Siena
Scuola Normale Superiore di Pisa
University of Pisa
Purdue University
Università di Roma
University of Turin
University of Eastern Piedmont
University of Trieste
Kangwon National University
Jeonbuk National University
Argonne National Laboratory
Chonnam National University
Korea University
Seoul National University
University of Seoul
Sungkyunkwan University
Vilnius University
University of Malaya
International Islamic University Malaysia
Malaysian Nuclear Agency
Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional
Consejo Nacional de Ciencia y Tecnologia Mexico
Universidad Iberoamericana (UIA)
Benemerita Universidad Autonoma de Puebla
Universidad Autonoma de San Luis Potosi
The University of Auckland
University of Canterbury
Quaid-I-Azam University
National Centre for Nuclear Research
University of Warsaw
Warsaw University of Technology
Laboratório de Instrumentação e Física Experimental de Partículas
RAS - Institute for Nuclear Research
Universitàdi Roma
RAS - Saint Petersburg Nuclear Physics Institute
Peter the Great St. Petersburg Polytechnic University
University of Florida
Alikhanov Institute for Theoretical and Experimental Physics
Moscow Engineering Physics Institute
RAS - P.N. Lebedev Physics Institute
California Institute of Technology
Institute for High Energy Physics
Karlsruhe Institute of Technology
University of Belgrade
CIEMAT
Universidad Autónoma de Madrid
University of Oviedo
Universidad de Cantabria
National Technical University of Athens
Riga Technical University
Paul Scherrer Institute
Swiss Federal Institute of Technology Zurich
University of Zurich
University of Bern
National Central University
National Taiwan University
Chulalongkorn University
Cukurova University
Gaziosmanpasa University
Adiyaman University
Mersin University
Cag University
Piri Reis University
Middle East Technical University
Ozyegin University
Izmir Institute of Technology
Bogazici University
Marmara University
Kafkas University
Istanbul Bilgi University
Yildiz Technical University
Istanbul Technical University
Hacettepe University
NASU - Institute for Single Crystals
NASU - Kharkov Institute of Physics and Technology
University of Bristol
Rutherford Appleton Laboratory
University of Southampton
Imperial College London
Instituto de Astrofísica de Canarias
Brunel University London
Baylor University
University of Alabama
Boston University
Brown University
University of California at Davis
University of California at Los Angeles
University of California at Riverside
University of California at San Diego
Utah Valley University
University of California at Santa Barbara
Carnegie Mellon University
University of Colorado Boulder
Cornell University
Fermi National Accelerator Laboratory
Florida International University
Florida State University
Florida Institute of Technology
University of Illinois at Chicago
University of Iowa
Johns Hopkins University
University of Kansas
Kansas State University
Lawrence Livermore National Laboratory
University of Maryland, College Park
Massachusetts Institute of Technology
University of Minnesota Twin Cities
University of Mississippi
University of Nebraska-Lincoln
SUNY Buffalo
Northwestern University
University of Notre Dame
Ohio State University
Princeton University
University of Puerto Rico
Purdue University Northwest
Rice University
University of Rochester
Rutgers - The State University of New Jersey, New Brunswick
University of Tennessee, Knoxville
Texas Tech University
Vanderbilt University
University of Virginia
Wayne State University
University of Wisconsin-Madison
Northeastern University

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

22 Atıf (Scopus)

Özet

An inclusive search is performed for supersymmetry in final states containing jets and an apparent imbalance in transverse momentum, p→_T ^miss, due to the production of unobserved weakly interacting particles in pp collisions at a centre-of-mass energy of 8 TeV. The data, recorded with the CMS detector at the CERN LHC, correspond to an integrated luminosity of 18.5 fb⁻¹. The dimensionless kinematic variable α_T is used to discriminate between events with genuine p→_T ^miss associated with unobserved particles and spurious values of p→_T ^miss arising from jet energy mismeasurements. No excess of event yields above the expected standard model backgrounds is observed. The results are interpreted in terms of constraints on the parameter space of several simplified models of supersymmetry that assume the pair production of top squarks. The search provides sensitivity to a broad range of top squark (t˜) decay modes, including the two-body decay t˜→cχ˜₁°, where c is a charm quark and χ˜₁° is the lightest neutralino, as well as the four-body decay t˜→bff¯^′χ˜₁°, where b is a bottom quark and f and f¯^′ are fermions produced in the decay of an intermediate off-shell W boson. These modes dominate in scenarios in which the top squark and lightest neutralino are nearly degenerate in mass. For these modes, top squarks with masses as large as 260 and 225 GeV are excluded, respectively, for the two- and four-body decays.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	403-430
Sayfa sayısı	28
Dergi	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Hacim	767
DOI'lar	https://doi.org/10.1016/j.physletb.2017.02.007
Yayın durumu	Yayınlandı - 10 Nis 2017

Bibliyografik not

Publisher Copyright:
© 2017 The Author

Finansman

Individuals have received support from the Marie-Curie programme and the European Research Council and EPLANET (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 Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Council of Scientific and Industrial Research, India; the HOMING PLUS programme of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund; the Mobility Plus programme of the Ministry of Science and Higher Education (Poland); the OPUS programme of the National Science Centre of Poland (Poland); the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF; the National Priorities Research Program by Qatar National Research Fund; the Programa Clarín-COFUND del Principado de Asturias; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University (Thailand); the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); and the Welch Foundation, contract C-1845.

Finansörler	Finansör numarası
Chulalongkorn Academic
EU-ESF
National Science Foundation	1606321, 1151640, 1506168, 1506130, 1211067, 1624356, 1508869
Alfred P. Sloan Foundation
Welch Foundation	C-1845
Alexander von Humboldt-Stiftung
Qatar National Research Fund
Science and Technology Facilities Council	ST/N000250/1, PP/E000479/1, ST/M004775/1, ST/K001256/1, GRIDPP, ST/N001273/1, ST/H000925/1
European Commission
European Research Council
Council of Scientific and Industrial Research, India
Ministerstvo Školství, Mládeže a Tělovýchovy
Fundacja na rzecz Nauki Polskiej
Belgian Federal Science Policy Office
Chulalongkorn University
Agentschap voor Innovatie door Wetenschap en Technologie
Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture
A.G. Leventis Foundation
Narodowe Centrum Nauki
Ministerstwo Edukacji i Nauki
European Regional Development Fund

Belgeye Erişim

10.1016/j.physletb.2017.02.007

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Search for top squark pair production in compressed-mass-spectrum scenarios in proton-proton collisions at s=8 TeV using the αT variable",

abstract = "An inclusive search is performed for supersymmetry in final states containing jets and an apparent imbalance in transverse momentum, p→T miss, due to the production of unobserved weakly interacting particles in pp collisions at a centre-of-mass energy of 8 TeV. The data, recorded with the CMS detector at the CERN LHC, correspond to an integrated luminosity of 18.5 fb−1. The dimensionless kinematic variable αT is used to discriminate between events with genuine p→T miss associated with unobserved particles and spurious values of p→T miss arising from jet energy mismeasurements. No excess of event yields above the expected standard model backgrounds is observed. The results are interpreted in terms of constraints on the parameter space of several simplified models of supersymmetry that assume the pair production of top squarks. The search provides sensitivity to a broad range of top squark (t˜) decay modes, including the two-body decay t˜→cχ˜1°, where c is a charm quark and χ˜1° is the lightest neutralino, as well as the four-body decay t˜→bff¯′χ˜1°, where b is a bottom quark and f and f¯′ are fermions produced in the decay of an intermediate off-shell W boson. These modes dominate in scenarios in which the top squark and lightest neutralino are nearly degenerate in mass. For these modes, top squarks with masses as large as 260 and 225 GeV are excluded, respectively, for the two- and four-body decays.",

keywords = "AlphaT, CMS, Jets, Missing transverse momentum, Physics, SUSY",

author = "\{CMS Collaboration\} and V. Khachatryan and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, \{V. M.\} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and A. K{\"o}nig and M. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and N. Rad and B. Rahbaran and H. Rohringer and J. Schieck and J. Strauss and W. Treberer-Treberspurg and W. Waltenberger and Wulz, \{C. E.\} and V. Mossolov and N. Shumeiko and \{Suarez Gonzalez\}, J. and S. Alderweireldt and T. Cornelis and \{De Wolf\}, \{E. A.\} and X. Janssen and A. Knutsson and J. Lauwers and S. Luyckx and \{Van De Klundert\}, M. and \{Van Haevermaet\}, H. and \{Van Mechelen\}, P. and \{Van Remortel\}, N. and \{Van Spilbeeck\}, A. and \{Abu Zeid\}, S. and A. Cakir",

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T1 - Search for top squark pair production in compressed-mass-spectrum scenarios in proton-proton collisions at s=8 TeV using the αT variable

AU - CMS Collaboration

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - König, A.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rad, N.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Strauss, J.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Alderweireldt, S.

AU - Cornelis, T.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Knutsson, A.

AU - Lauwers, J.

AU - Luyckx, S.

AU - Van De Klundert, M.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Remortel, N.

AU - Van Spilbeeck, A.

AU - Abu Zeid, S.

AU - Cakir, A.

PY - 2017/4/10

Y1 - 2017/4/10

N2 - An inclusive search is performed for supersymmetry in final states containing jets and an apparent imbalance in transverse momentum, p→T miss, due to the production of unobserved weakly interacting particles in pp collisions at a centre-of-mass energy of 8 TeV. The data, recorded with the CMS detector at the CERN LHC, correspond to an integrated luminosity of 18.5 fb−1. The dimensionless kinematic variable αT is used to discriminate between events with genuine p→T miss associated with unobserved particles and spurious values of p→T miss arising from jet energy mismeasurements. No excess of event yields above the expected standard model backgrounds is observed. The results are interpreted in terms of constraints on the parameter space of several simplified models of supersymmetry that assume the pair production of top squarks. The search provides sensitivity to a broad range of top squark (t˜) decay modes, including the two-body decay t˜→cχ˜1°, where c is a charm quark and χ˜1° is the lightest neutralino, as well as the four-body decay t˜→bff¯′χ˜1°, where b is a bottom quark and f and f¯′ are fermions produced in the decay of an intermediate off-shell W boson. These modes dominate in scenarios in which the top squark and lightest neutralino are nearly degenerate in mass. For these modes, top squarks with masses as large as 260 and 225 GeV are excluded, respectively, for the two- and four-body decays.

AB - An inclusive search is performed for supersymmetry in final states containing jets and an apparent imbalance in transverse momentum, p→T miss, due to the production of unobserved weakly interacting particles in pp collisions at a centre-of-mass energy of 8 TeV. The data, recorded with the CMS detector at the CERN LHC, correspond to an integrated luminosity of 18.5 fb−1. The dimensionless kinematic variable αT is used to discriminate between events with genuine p→T miss associated with unobserved particles and spurious values of p→T miss arising from jet energy mismeasurements. No excess of event yields above the expected standard model backgrounds is observed. The results are interpreted in terms of constraints on the parameter space of several simplified models of supersymmetry that assume the pair production of top squarks. The search provides sensitivity to a broad range of top squark (t˜) decay modes, including the two-body decay t˜→cχ˜1°, where c is a charm quark and χ˜1° is the lightest neutralino, as well as the four-body decay t˜→bff¯′χ˜1°, where b is a bottom quark and f and f¯′ are fermions produced in the decay of an intermediate off-shell W boson. These modes dominate in scenarios in which the top squark and lightest neutralino are nearly degenerate in mass. For these modes, top squarks with masses as large as 260 and 225 GeV are excluded, respectively, for the two- and four-body decays.

KW - AlphaT

KW - CMS

KW - Jets

KW - Missing transverse momentum

KW - Physics

KW - SUSY

UR - https://www.scopus.com/pages/publications/85013378489

U2 - 10.1016/j.physletb.2017.02.007

DO - 10.1016/j.physletb.2017.02.007

M3 - Article

AN - SCOPUS:85013378489

SN - 0370-2693

VL - 767

SP - 403

EP - 430

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -