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Search for scalar leptoquarks in pp collisions at √S = 13TeV with the ATLAS experiment

Aaboud, M; Aad, G; Abbott, B.; Abdallah, J; Abdinov, O; Abeloos, B; Åkesson, Torsten LU ; Bocchetta, Simona LU ; BRYNGEMARK, LENE LU and Doglioni, Caterina LU , et al. (2016) In New Journal of Physics 18(9). p.1-25
Abstract
An inclusive search for a new-physics signature of lepton-jet resonances has been performed by the ATLAS experiment. Scalar leptoquarks, pair-produced in pp collisions at s √S13 TeV at the large hadron collider, have been considered. An integrated luminosity of 3.2 fb−1, corresponding to the full 2015 dataset was used. First (second) generation leptoquarks were sought in events with two electrons (muons) and two or more jets. The observed event yield in each channel is consistent with Standard Model background expectations. The observed (expected) lower limits on the leptoquark mass at 95% confidence level are 1100 and 1050 GeV (1160 and 1040 GeV) for first and second generation leptoquarks, respectively, assuming a branching ratio into a... (More)
An inclusive search for a new-physics signature of lepton-jet resonances has been performed by the ATLAS experiment. Scalar leptoquarks, pair-produced in pp collisions at s √S13 TeV at the large hadron collider, have been considered. An integrated luminosity of 3.2 fb−1, corresponding to the full 2015 dataset was used. First (second) generation leptoquarks were sought in events with two electrons (muons) and two or more jets. The observed event yield in each channel is consistent with Standard Model background expectations. The observed (expected) lower limits on the leptoquark mass at 95% confidence level are 1100 and 1050 GeV (1160 and 1040 GeV) for first and second generation leptoquarks, respectively, assuming a branching ratio into a charged lepton and a quark of 100%. Upper limits on the aforementioned branching ratio are also given as a function of leptoquark mass. Compared with the results of earlier ATLAS searches, the sensitivity is increased for leptoquark masses above 860 GeV, and the observed exclusion limits confirm and extend the published results. © 2016 CERN for the benefit of the ATLAS Collaboration. (Less)
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keywords
ATLAS, Leptoquark, LHC, Elementary particles, Fighter aircraft, Tellurium compounds, ATLAS experiment, Branching ratio, Charged leptons, Confidence levels, Integrated luminosity, Large Hadron Collider, Second generation, Standard model, High energy physics
in
New Journal of Physics
volume
18
issue
9
pages
25 pages
publisher
IOP Publishing Ltd.
external identifiers
  • scopus:84990934088
ISSN
1367-2630
DOI
10.1088/1367-2630/18/9/093016
language
English
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yes
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fe842d29-9ae2-491f-a173-6f56ec97c04f
date added to LUP
2017-06-14 12:48:38
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2017-11-14 09:51:34
@article{fe842d29-9ae2-491f-a173-6f56ec97c04f,
  abstract     = {An inclusive search for a new-physics signature of lepton-jet resonances has been performed by the ATLAS experiment. Scalar leptoquarks, pair-produced in pp collisions at s √S13 TeV at the large hadron collider, have been considered. An integrated luminosity of 3.2 fb−1, corresponding to the full 2015 dataset was used. First (second) generation leptoquarks were sought in events with two electrons (muons) and two or more jets. The observed event yield in each channel is consistent with Standard Model background expectations. The observed (expected) lower limits on the leptoquark mass at 95% confidence level are 1100 and 1050 GeV (1160 and 1040 GeV) for first and second generation leptoquarks, respectively, assuming a branching ratio into a charged lepton and a quark of 100%. Upper limits on the aforementioned branching ratio are also given as a function of leptoquark mass. Compared with the results of earlier ATLAS searches, the sensitivity is increased for leptoquark masses above 860 GeV, and the observed exclusion limits confirm and extend the published results. © 2016 CERN for the benefit of the ATLAS Collaboration.},
  author       = {Aaboud, M and Aad, G and Abbott, B. and Abdallah, J and Abdinov, O and Abeloos, B and Åkesson, Torsten and Bocchetta, Simona and BRYNGEMARK, LENE and Doglioni, Caterina and Floderus, Anders and Hedberg, Vincent and Jarlskog, Göran and Lytken, Else and Mjörnmark, Ulf and Smirnova, Oxana and Viazlo, Oleksandr and , },
  issn         = {1367-2630},
  keyword      = {ATLAS,Leptoquark,LHC,Elementary particles,Fighter aircraft,Tellurium compounds,ATLAS experiment,Branching ratio,Charged leptons,Confidence levels,Integrated luminosity,Large Hadron Collider,Second generation,Standard model,High energy physics},
  language     = {eng},
  number       = {9},
  pages        = {1--25},
  publisher    = {IOP Publishing Ltd.},
  series       = {New Journal of Physics},
  title        = {Search for scalar leptoquarks in pp collisions at √S = 13TeV with the ATLAS experiment},
  url          = {http://dx.doi.org/10.1088/1367-2630/18/9/093016},
  volume       = {18},
  year         = {2016},
}