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Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector

Publication ,  Journal Article
Aad, G; Abbott, B; Abdallah, J; Abdel Khalek, S; Abdinov, O; Aben, R; Abi, B; Abolins, M; AbouZeid, OS; Abramowicz, H; Abreu, H; Abreu, R ...
Published in: Journal of High Energy Physics
September 1, 2014

The results of a search for direct pair production of the scalar partner to the top quark using an integrated luminosity of 20.1 fb-1 of proton-proton collision data at yfs = 8 TeV recorded with the ATLAS detector at the LHC are reported. The top squark is assumed to decay via t → t χ¯01 or t → b χ1 → bW(*)χ-01, where χ-01 (x1) denotes the lightest neutralino (chargino) in supersymmetric models. The search targets a fully-hadronic final state in events with four or more jets and large missing transverse momentum. No significant excess over the Standard Model background prediction is observed, and exclusion limits are reported in terms of the top squark and neutralino masses and as a function of the branching fraction of t → t χ-01. For a branching fraction of 100%, top squark masses in the range 270-645 GeV are excluded for χ-01 masses below 30GeV. For a branching fraction of 50% to either t → t χ-01 or t → b χ-01, and assuming the χ¯1 mass to be twice the χ-01 mass, top squark masses in the range 250-550 GeV are excluded for χ-01 masses below 60 GeV.

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Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

ISSN

1126-6708

Publication Date

September 1, 2014

Volume

2014

Issue

9

Start / End Page

1 / 51

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics
 

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Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., … Arnaez, O. (2014). Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector. Journal of High Energy Physics, 2014(9), 1–51. https://doi.org/10.1007/JHEP09(2014)015
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, et al. “Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector.” Journal of High Energy Physics 2014, no. 9 (September 1, 2014): 1–51. https://doi.org/10.1007/JHEP09(2014)015.
Aad G, Abbott B, Abdallah J, Abdel Khalek S, Abdinov O, Aben R, et al. Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector. Journal of High Energy Physics. 2014 Sep 1;2014(9):1–51.
Aad, G., et al. “Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector.” Journal of High Energy Physics, vol. 2014, no. 9, Sept. 2014, pp. 1–51. Scopus, doi:10.1007/JHEP09(2014)015.
Aad G, Abbott B, Abdallah J, Abdel Khalek S, Abdinov O, Aben R, Abi B, Abolins M, AbouZeid OS, Abramowicz H, Abreu H, Abreu R, Abulaiti Y, Acharya BS, Adamczyk L, Adams DL, Adelman J, Adomeit S, Adye T, Agatonovic-Jovin T, Aguilar-Saavedra JA, Agustoni M, Ahlen SP, Ahmadov F, Aielli G, Akerstedt H, Åkesson TPA, Akimoto G, Akimov AV, Alberghi GL, Albert J, Albrand S, Alconada Verzini MJ, Aleksa M, Aleksandrov IN, Alexa C, Alexander G, Alexandre G, Alexopoulos T, Alhroob M, Alimonti G, Alio L, Alison J, Allbrooke BMM, Allison LJ, Allport PP, Almond J, Aloisio A, Alonso A, Alonso F, Alpigiani C, Altheimer A, Alvarez Gonzalez B, Alviggi MG, Amako K, Amaral Coutinho Y, Amelung C, Amidei D, Amor Dos Santos SP, Amorim A, Amoroso S, Amram N, Amundsen G, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders G, Anderson KJ, Andreazza A, Andrei V, Anduaga XS, Angelidakis S, Angelozzi I, Anger P, Angerami A, Anghinolfi F, Anisenkov AV, Anjos N, Annovi A, Antonaki A, Antonelli M, Antonov A, Antos J, Anulli F, Aoki M, Aperio Bella L, Apolle R, Arabidze G, Aracena I, Arai Y, Araque JP, Arce ATH, Arguin JF, Argyropoulos S, Arik M, Armbruster AJ, Arnaez O. Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at √s = 8TeV with the ATLAS detector. Journal of High Energy Physics. 2014 Sep 1;2014(9):1–51.
Journal cover image

Published In

Journal of High Energy Physics

DOI

EISSN

1029-8479

ISSN

1126-6708

Publication Date

September 1, 2014

Volume

2014

Issue

9

Start / End Page

1 / 51

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5106 Nuclear and plasma physics
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0105 Mathematical Physics