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      <dc:title>Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in pp collisions at root s = 13 TeV with the ATLAS detector</dc:title>
      <dc:creator>Aad, G.</dc:creator>
      <dc:creator>Aguilar Saavedra, Juan Antonio</dc:creator>
      <dc:creator>Atlas Collaboration</dc:creator>
      <dc:subject>Hadron-Hadron scattering (experiments)</dc:subject>
      <dc:subject>Supersymmetry</dc:subject>
      <dc:description>We thank CERN for the very successful operation of the LHC, as well as the support staff&#xd;
from our institutions without whom ATLAS could not be operated efficiently.&#xd;
We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia;&#xd;
BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP,&#xd;
Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC,&#xd;
China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic;&#xd;
DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG,&#xd;
Georgia; BMBF, HGF and MPG, Germany; GSRT, Greece; RGC and Hong Kong SAR,&#xd;
China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST,&#xd;
Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal;&#xd;
MNE/IFA, Romania; MES of Russia and NRC KI, Russia Federation; JINR; MESTD,&#xd;
Serbia; MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DST/NRF, South Africa; MICINN,&#xd;
Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and&#xd;
Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and&#xd;
NSF, United States of America. In addition, individual groups and members have received&#xd;
support from BCKDF, CANARIE, Compute Canada and CRC, Canada; ERC, ERDF,&#xd;
Horizon 2020, Marie Skłodowska-Curie Actions and COST, European Union; Investissements&#xd;
d’Avenir Labex, Investissements d’Avenir Idex and ANR, France; DFG and AvH Foundation,&#xd;
Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the&#xd;
Greek NSRF, Greece; BSF-NSF and GIF, Israel; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat&#xd;
Valenciana, Spain; Göran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme&#xd;
Trust, United Kingdom.&#xd;
The crucial computing support from all WLCG partners is acknowledged gratefully,&#xd;
in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF&#xd;
(Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF&#xd;
(Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (U.K.) and BNL (U.S.A.),&#xd;
the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors&#xd;
of computing resources are listed in ref. [138].</dc:description>
      <dc:description>A search for new phenomena with top quark pairs in final states with one isolated electron or muon, multiple jets, and large missing transverse momentum is performed. Signal regions are designed to search for two-, three-, and four-body decays of the directly pair-produced supersymmetric partner of the top quark (stop). Additional signal regions are designed specifically to search for spin-0 mediators that are produced in association with a pair of top quarks and decay into a pair of dark-matter particles. The search is performed using the Large Hadron Collider proton-proton collision dataset at a centre-of-mass energy of s = 13 TeV recorded by the ATLAS detector from 2015 to 2018, corresponding to an integrated luminosity of 139 fb(-1). No significant excess above the Standard Model background is observed, and limits at 95% confidence level are set in the stop-neutralino mass plane and as a function of the mediator mass or the dark-matter particle mass. Stops are excluded up to 1200 GeV (710 GeV) in the two-body (three-body) decay scenario. In the four-body scenario stops up to 640 GeV are excluded for a stop-neutralino mass difference of 60 GeV. Scalar and pseudoscalar dark-matter mediators are excluded up to 200 GeV when the coupling strengths of the mediator to Standard Model and dark-matter particles are both equal to one and when the mass of the dark-matter particle is 1 GeV.</dc:description>
      <dc:date>2021-06-07T06:52:01Z</dc:date>
      <dc:date>2021-06-07T06:52:01Z</dc:date>
      <dc:date>2021-04-19</dc:date>
      <dc:type>info:eu-repo/semantics/article</dc:type>
      <dc:identifier>The ATLAS collaboration., Aad, G., Abbott, B. et al. Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in pp collisions at s√ = 13 TeV with the ATLAS detector. J. High Energ. Phys. 2021, 174 (2021). [https://doi.org/10.1007/JHEP04(2021)174]</dc:identifier>
      <dc:identifier>http://hdl.handle.net/10481/68999</dc:identifier>
      <dc:identifier>10.1007/JHEP04(2021)174</dc:identifier>
      <dc:language>eng</dc:language>
      <dc:rights>http://creativecommons.org/licenses/by/3.0/es/</dc:rights>
      <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
      <dc:rights>Atribución 3.0 España</dc:rights>
      <dc:publisher>Springer</dc:publisher>
   </ow:Publication>
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