Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at √(s) = 8 TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1103/PhysRevD.88.112006

Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at √(s) = 8 TeV with the ATLAS detector

ATLAS Collaboration

University of Freiburg
University Bonn
University of Oklahoma
The Barcelona Institute of Science and Technology
Laboratoire de l'Accélérateur Linéaire
Azerbaijan Academy of Sciences
University of Amsterdam
Oklahoma State University
Michigan State University
University of Toronto
Tel Aviv University
Universite Paris-Saclay
Stockholm University
Oskar Klein Centre
INFN Sezione di Trieste
Abdus Salam International Centre for Theoretical Physics
King's College London
Agh University of Science and Technology Faculty of Computer Science
Brookhaven National Laboratory
Hampton University
Yale University
Universität München
Rutherford Appleton Laboratory
Brandeis University
University of Belgrade
University of Granada
Lisboa
University of Bern
Boston University
Stony Brook University
Joint Institute for Nuclear Research, Dubna
University of Texas
INFN Roma Tor Vergata
University of Rome “Tor Vergata”
Lund University
University of Tokyo
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Royal Holloway University of London
University of Victoria
Laboratoire de Physique Subatomique et de Cosmologie de Grenoble
Instituto de Física La Plata
European Organization for Nuclear Research
Sezione INFN di Milano
Horia Hulubei National Institute of Physics and Nuclear Engineering
University of Geneva
National Technical University of Athens
and Physics University of Udine
Humboldt-Universität zu Berlin
Universités Paris VI and VII
University of Cambridge
Université Savoie Mont Blanc
Aix Marseille Université
University of Chicago
University of Birmingham
Lancaster University
University of Liverpool
University of Glasgow
University of Manchester
INFN Sezione di Napoli
University of Naples Federico II
Weizmann Institute of Science Israel
Niels Bohr Institutet
Columbia University
High Energy Accelerator Research Organization (KEK)
Instituto de Biofisica da UFRJ
Kurchatov Institute
Faculdade de Ciências, Universidade de Lisboa
University of Heidelberg
University of Milano
University of Athens
Technical University Dresden
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
LNF-INFN
National Research Nuclear University MEPhI
Slovak Academy of Sciences
Sezione di Roma
Nagoya University
University of Oxford
Stanford Linear Accelerator Center
Duke University
Universite de Montreal
c/o DESY
Bogazici University
University of Michigan, Ann Arbor
Johannes Gutenberg University
Universidad Autónoma de Madrid
Institute for Theoretical and Experimental Physics
Argonne National Laboratory
Comenius University
University of Illinois
Universität Siegen
Czech Technical University in Prague
University of Johannesburg
University of British Columbia
TRIUMF
University Roma Tre
Ernest Orlando Lawrence Berkeley National Laboratory
Aristotle University of Thessaloniki
Dipartimento di Fisica
Institute of High Energy Physics, Chinese Academy of Sciences
University College London
Charles University
Institute for Nuclear Physics
University of Wisconsin-Madison
University of Sydney
University of Melbourne
Sezione di Genova
University of Genoa
Max-Planck-Institut für Physik
Bergische Universität Gesamthochschule Wuppertal
Harvard University
University of Sussex
California State University, Fresno
Tufts University
University of Washington
Gaziantep University
McGill University
INFN Sezione di Bologna
Carleton University
Novosibirsk State University
Université Hassan II
York University
University of Regina
Louisiana Tech University
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
University of Pisa
Radboud University
University of Edinburgh
University of Pittsburgh
Georg-August-Universität Göttingen
University of Bologna
B. I. Stepanov Institute of Physics
Institute of Physics of the Czech Academy of Sciences
Moscow State University
Queen Mary University of London
Université Blaise Pascal
Université Mohamed Premier
University of Texas at Arlington
Tokyo Metropolitan University
UMass Amherst
University of Oregon
University of Pennsylvania School of Arts and Sciences
Uppsala University
Universidad Técnica Federico Santa María
Indiana University Bloomington
University of Bergen
New York University
University of Oslo
University of Dortmund
University of Alberta
University of Valencia
Ankara University
Northern Illinois University
Southern Methodist University
University of Calabria
Pontificia Universidad Católica de Chile
University of the Witwatersrand, Johannesburg
University of Coimbra
Sezione di Lecce
Federal University of Juiz de Fora (UFJF)
Dogus University
Iowa State University
Nanjing University
Faculté des Sciences Rabat
University of Arizona
Academia Sinica, Institute Of Physics
University of Iowa
University of Ljubljana
INFN Sezione di Pavia
University of Pavia
Università di Napoli Parthenope
Institute of Particle Physics
Long Beach VA and University of California
The University of Sheffield
University of California at Santa Cruz
University 'Politehnica' of Bucharest
Simon Fraser University
Middle East Technical University (METU)
Technion - Israel Institute of Technology
Tbilisi State University
Federal University of Sao Joao del Rei (UFSJ)
Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa
University of São Paulo
Justus-Liebig-Universität Giessen
State University of New York Albany
Cadi Ayyad University
University of Warwick
Petersburg Nuclear Physics Institute (PNPI)
Shandong University
The Ohio State University
University of Würzburg
University of Innsbruck
University of Science and Technology of China
Centre National de l'Energie des Sciences Techniques Nucleaires
University of the Aegean
Universidad de Buenos Aires
University of New Mexico
University of Salento
Pompeu Fabra University (UPF)
Yerevan Physics Institute
Palacky University Olomouc
University of Cape Town
Osaka University
University of Tsukuba
Shinshu University
Waseda University
Kobe University
Kyoto University
Tokyo Institute of Technology
University of Adelaide
KTH Royal Institute of Technology
Kyushu University
Ochanomizu University
Manhattan College
University of Belgrade
Sun Yat-Sen University
Universidad Antonio Narino
National Institute of Science Education and Research
Moscow Institute of Physics and Technology
Hiroshima Institute of Technology
Okayama University
Universidade de Minho
The University of Texas at Austin
Wigner Research Centre for Physics
International School of Advanced Studies
National Institute for Research and Development of Isotopic and Molecular Technologies
University of South Carolina
Université Paris-Sud
Jagiellonian University
Nagasaki Institute of Applied Science
TOBB University of Economics and Technology
Kyoto University of Education
Ritsumeikan University Biwako-Kusatsu Campus
Massachusetts Institute of Technology
Tbilisi State University
Turkish Atomic Energy Authority
Universität Hamburg
University of KwaZulu-Natal
Shanghai Jiao Tong University
National Centre for Particle and High Energy Physics
Gazi University

Research output: Contribution to journal › Article › peer-review

Abstract

A search is presented for direct chargino production based on a disappearing-track signature using 20:3 fb^-1 of proton-proton collisions at √s = 8 TeV collected with the ATLAS experiment at the LHC. In anomaly-mediated supersymmetry breaking (AMSB) models, the lightest chargino is nearly mass degenerate with the lightest neutralino and its lifetime is long enough to be detected in the tracking detectors by identifying decays that result in tracks with no associated hits in the outer region of the tracking system. Some models with supersymmetry also predict charginos with a significant lifetime. This analysis attains sensitivity for charginos with a lifetime between 0.1 and 10 ns, and significantly surpasses the reach of the LEP experiments. No significant excess above the background expectation is observed for candidate tracks with large transverse momentum, and constraints on chargino properties are obtained. In the AMSB scenarios, a chargino mass below 270 GeV is excluded at 95% confidence level.

Original language	English
Article number	112006
Pages (from-to)	112006-1-112006-23
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	88
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.88.112006
Publication status	Published - 1 Jan 2013
Externally published	Yes

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10.1103/PhysRevD.88.112006

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@article{34ab89eb3a7a425ba301363ba46acdda,

title = "Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at √(s) = 8 TeV with the ATLAS detector",

abstract = "A search is presented for direct chargino production based on a disappearing-track signature using 20:3 fb-1 of proton-proton collisions at √s = 8 TeV collected with the ATLAS experiment at the LHC. In anomaly-mediated supersymmetry breaking (AMSB) models, the lightest chargino is nearly mass degenerate with the lightest neutralino and its lifetime is long enough to be detected in the tracking detectors by identifying decays that result in tracks with no associated hits in the outer region of the tracking system. Some models with supersymmetry also predict charginos with a significant lifetime. This analysis attains sensitivity for charginos with a lifetime between 0.1 and 10 ns, and significantly surpasses the reach of the LEP experiments. No significant excess above the background expectation is observed for candidate tracks with large transverse momentum, and constraints on chargino properties are obtained. In the AMSB scenarios, a chargino mass below 270 GeV is excluded at 95\% confidence level.",

author = "\{ATLAS Collaboration\} and G. Aad and T. Abajyan and B. Abbott and J. Abdallah and \{Abdel Khalek\}, S. and O. Abdinov and R. Aben and B. Abi and M. Abolins and \{Abou Zeid\}, \{O. S.\} and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and L. Adamczyk and Adams, \{D. L.\} and Addy, \{T. N.\} and J. Adelman and S. Adomeit and T. Adye and S. Aefsky and T. Agatonovic-Jovin and Aguilar-Saavedra, \{J. A.\} and M. Agustoni and Ahlen, \{S. P.\} and A. Ahmad and F. Ahmadov and M. Ahsan and G. Aielli and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and Alam, \{M. A.\} and J. Albert and S. Albrand and \{Alconada Verzini\}, \{M. J.\} and M. Aleksa and Aleksandrov, \{I. N.\} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and M. Aliev and G. Alimonti and O. Davignon and T. Mueller and Sauvan, \{J. B.\} and O. Simard",

note = "Publisher Copyright: {\textcopyright} 2013 CERN, for the ATLAS Collaboration.",

year = "2013",

month = jan,

day = "1",

doi = "10.1103/PhysRevD.88.112006",

language = "English",

volume = "88",

pages = "112006--1--112006--23",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "11",

}

Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at √(s) = 8 TeV with the ATLAS detector. / ATLAS Collaboration.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 88, No. 11, 112006, 01.01.2013, p. 112006-1-112006-23.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at √(s) = 8 TeV with the ATLAS detector

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abajyan, T.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdel Khalek, S.

AU - Abdinov, O.

AU - Aben, R.

AU - Abi, B.

AU - Abolins, M.

AU - Abou Zeid, O. S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Adomeit, S.

AU - Adye, T.

AU - Aefsky, S.

AU - Agatonovic-Jovin, T.

AU - Aguilar-Saavedra, J. A.

AU - Agustoni, M.

AU - Ahlen, S. P.

AU - Ahmad, A.

AU - Ahmadov, F.

AU - Ahsan, M.

AU - Aielli, G.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Alconada Verzini, M. J.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Aliev, M.

AU - Alimonti, G.

AU - Davignon, O.

AU - Mueller, T.

AU - Sauvan, J. B.

AU - Simard, O.

PY - 2013/1/1

Y1 - 2013/1/1

N2 - A search is presented for direct chargino production based on a disappearing-track signature using 20:3 fb-1 of proton-proton collisions at √s = 8 TeV collected with the ATLAS experiment at the LHC. In anomaly-mediated supersymmetry breaking (AMSB) models, the lightest chargino is nearly mass degenerate with the lightest neutralino and its lifetime is long enough to be detected in the tracking detectors by identifying decays that result in tracks with no associated hits in the outer region of the tracking system. Some models with supersymmetry also predict charginos with a significant lifetime. This analysis attains sensitivity for charginos with a lifetime between 0.1 and 10 ns, and significantly surpasses the reach of the LEP experiments. No significant excess above the background expectation is observed for candidate tracks with large transverse momentum, and constraints on chargino properties are obtained. In the AMSB scenarios, a chargino mass below 270 GeV is excluded at 95% confidence level.

AB - A search is presented for direct chargino production based on a disappearing-track signature using 20:3 fb-1 of proton-proton collisions at √s = 8 TeV collected with the ATLAS experiment at the LHC. In anomaly-mediated supersymmetry breaking (AMSB) models, the lightest chargino is nearly mass degenerate with the lightest neutralino and its lifetime is long enough to be detected in the tracking detectors by identifying decays that result in tracks with no associated hits in the outer region of the tracking system. Some models with supersymmetry also predict charginos with a significant lifetime. This analysis attains sensitivity for charginos with a lifetime between 0.1 and 10 ns, and significantly surpasses the reach of the LEP experiments. No significant excess above the background expectation is observed for candidate tracks with large transverse momentum, and constraints on chargino properties are obtained. In the AMSB scenarios, a chargino mass below 270 GeV is excluded at 95% confidence level.

UR - https://www.scopus.com/pages/publications/84890919315

U2 - 10.1103/PhysRevD.88.112006

DO - 10.1103/PhysRevD.88.112006

M3 - Article

AN - SCOPUS:84890919315

SN - 1550-7998

VL - 88

SP - 112006-1-112006-23

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 11

M1 - 112006

ER -

Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at √(s) = 8 TeV with the ATLAS detector

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