@misc{10481/60165,
year = {2019},
month = {5},
url = {http://hdl.handle.net/10481/60165},
abstract = {A search for new particles decaying into a pair of top quarks is performed using proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at a center-of-mass energy of s√=13 TeV corresponding to an integrated luminosity of 36.1 fb−1. Events consistent with top-quark pair production and the fully hadronic decay mode of the top quarks are selected by requiring multiple high transverse momentum jets including those containing b-hadrons. Two analysis techniques, exploiting dedicated top-quark pair reconstruction in different kinematic regimes, are used to optimize the search sensitivity to new hypothetical particles over a wide mass range. The invariant mass distribution of the two reconstructed top-quark candidates is examined for resonant production of new particles with various spins and decay widths. No significant deviation from the Standard Model prediction is observed and limits are set on the production cross-section times branching fraction for new hypothetical Z′ bosons, dark-matter mediators, Kaluza-Klein gravitons and Kaluza-Klein gluons. By comparing with the predicted production cross-sections, the Z′ boson in the topcolor-assisted-technicolor model is excluded for masses up to 3.1−3.6 TeV, the dark-matter mediators in a simplified framework are excluded in the mass ranges from 0.8 TeV to 0.9 TeV and from 2.0 TeV to 2.2 TeV, and the Kaluza-Klein gluon is excluded for masses up to 3.4 TeV, depending on the decay widths of the particles.},
organization = {We
acknowledge the support of ANPCyT, Argentina; YerPhI,
Armenia; ARC, Australia; BMWFW and FWF, Austria;
ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP,
Brazil; NSERC,NRCand CFI, Canada; CERN; CONICYT,
Chile; CAS, MOST and NSFC, China; COLCIENCIAS,
Colombia; MSMT CR, MPO CR and VSC CR, Czech
Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS,
CEA-DRF/IRFU, France; SRNSFG,Georgia;BMBF, HGF,
and MPG, Germany; GSRT, Greece; RGC, Hong Kong
SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy;
MEXT and JSPS, Japan; CNRST, Morocco; NWO,
Netherlands; RCN, Norway; MNiSW and NCN, Poland;
FCT, Portugal; MNE/IFA, Romania; MES of Russia and
NRC KI, Russian Federation; JINR; MESTD, Serbia;
MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DST/NRF,
South Africa; MINECO, Spain; SRC and Wallenberg
Foundation, Sweden; SERI, SNSF and Cantons of Bern
and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey;
STFC, United Kingdom; DOE and NSF, United States of
America. In addition, individual groups and members have
received support from BCKDF, CANARIE, CRC and
Compute Canada, Canada; COST, ERC, ERDF, Horizon
2020, and Marie Skłodowska-Curie Actions, European
Union; Investissements d’ Avenir Labex and Idex, ANR,
France; DFG and AvH Foundation, Germany; Herakleitos,
Thales and Aristeia programmes co-financed by EU-ESF
and the Greek NSRF, Greece; BSF-NSF and GIF, Israel;
CERCA Programme Generalitat de Catalunya, Spain; The
Royal Society and Leverhulme Trust, United Kingdom.},
publisher = {American Physical Society},
title = {Search for heavy particles decaying into a top-quark pair in the fully hadronic final state in pp collisions at s√=13 TeV with the ATLAS detector},
doi = {10.1103/PhysRevD.99.092004},
author = {Aaboud, M. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration},
}