Search for W - GT tb - GT qqbb decays in pp collisions at root s=8 TeV with the ATLAS detector

A search for a massive W gauge boson decaying to a top quark and a bottom quark is performed with the ATLAS detector in pp collisions at the LHC. The datasetwas taken at a centre-of-mass energy of root s = 8 TeV and corresponds to 20.3 fb(-1) of integrated luminosity. This analysis is done in the hadronic decay mode of the top quark, where novel jet substructure techniques are used to identify jets from high-momentum top quarks. This allows for a search for high-mass W bosons in the range 1.5-3.0 TeV. b-tagging is used to identify jets originating from b-quarks. The data are consistent with Standard Model background-only expectations, and upper limits at 95% confidence level are set on the W - GT tb cross section times branching ratio ranging from 0.16 pb to 0.33 pb for left-handed W bosons, and ranging from 0.10 pb to 0.21 pb for W bosons with purely righthanded couplings. Upper limits at 95% confidence level are set on the W-boson coupling to tb as a function of the W mass using an e...

Source:
European Physical Journal C. Particles and Fields, 2015, 75, 4

Funding / projects:

ANPCyT, Argentina, YerPhI, Armenia, ARC, Australia, BMWFW, Austria, FWF, Austria, ANAS, Azerbaijan, SSTC, Belarus, CNPq, Brazil, FAPESP, Brazil, NSERC, Canada, NRC, Canada, CFI, Canada, CERN, CONICYT, Chile, CAS, China, MOST, China, NSFC, China, COLCIENCIAS, Colombia, MSMT CR, Czech Republic, MPO CR, Czech Republic, VSC CR, Czech Republic, DNRF, Denmark, DNSRC, Denmark, Lundbeck Foundation, Denmark, EPLANET, European Union, ERC, European Union, NSRF, European Union, IN2P3-CNRS, France, CEA-DSM/IRFU, France, GNSF, Georgia, BMBF, Germany, DFG, Germany, HGF, Germany, MPG, Germany, AvH Foundation, Germany, GSRT, Greece, NSRF, Greece, RGC, Hong Kong SAR, China, ISF, Israel, MINERVA, Israel, GIF, Israel, I-CORE, Israel, Benoziyo Center, Israel, INFN, Italy, MEXT, Japan, JSPS, Japan, CNRST, Morocco, FOM, Netherlands, NWO, Netherlands, BRF, Norway, RCN, Norway, MNiSW, Poland, NCN, Poland, GRICES, Portugal, FCT, Portugal, MNE/IFA, Romania, MES of Russia, ROSATOM, Russian Federation, JINR, MSTD, Serbia, MSSR, Slovakia, ARRS, Slovenia, MIZS, Slovenia, DST/NRF, South Africa, MINECO, Spain, SRC, Sweden, Wallenberg Foundation, Sweden, SER, Switzerland, SNSF, Switzerland, Cantons of Bern and Geneva, Switzerland, NSC, Taiwan, TAEK, Turkey, STFC, United Kingdom, Royal Society, United Kingdom, Leverhulme Trust, United Kingdom, DOE, United States of America, NSF, United States of America, ICREA

DOI: 10.1140/epjc/s10052-015-3372-2

ISSN: 1434-6044; 1434-6052

WoS: 000355671700005

Scopus: 2-s2.0-84951869663

[ Google Scholar ]



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TY  - JOUR
AU  - Aad, G.
AU  - Agatonović-Jovin, Tatjana
AU  - Ćirković, Predrag
AU  - Dimitrievska, A.
AU  - Krstić, Jelena
AU  - Mamužić, Judita
AU  - Marjanović, M.
AU  - Popović, D. S.
AU  - Sijacki, Dj.
AU  - Simić, Lj.
AU  - Vranješ, Nenad
AU  - Vranješ Milosavljević, Marija
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/587
AB  - A search for a massive W gauge boson decaying to a top quark and a bottom quark is performed with the ATLAS detector in pp collisions at the LHC. The datasetwas taken at a centre-of-mass energy of root s = 8 TeV and corresponds to 20.3 fb(-1) of integrated luminosity. This analysis is done in the hadronic decay mode of the top quark, where novel jet substructure techniques are used to identify jets from high-momentum top quarks. This allows for a search for high-mass W bosons in the range 1.5-3.0 TeV. b-tagging is used to identify jets originating from b-quarks. The data are consistent with Standard Model background-only expectations, and upper limits at 95% confidence level are set on the W - GT tb cross section times branching ratio ranging from 0.16 pb to 0.33 pb for left-handed W bosons, and ranging from 0.10 pb to 0.21 pb for W bosons with purely righthanded couplings. Upper limits at 95% confidence level are set on the W-boson coupling to tb as a function of the W mass using an effective field theory approach, which is independent of details of particular models predicting a W boson.
T2  - European Physical Journal C. Particles and Fields
T1  - Search for W - GT tb - GT qqbb decays in pp collisions at root s=8 TeV with the ATLAS detector
VL  - 75
IS  - 4
DO  - 10.1140/epjc/s10052-015-3372-2
ER  -

@article{
author = "Aad, G. and Agatonović-Jovin, Tatjana and Ćirković, Predrag and Dimitrievska, A. and Krstić, Jelena and Mamužić, Judita and Marjanović, M. and Popović, D. S. and Sijacki, Dj. and Simić, Lj. and Vranješ, Nenad and Vranješ Milosavljević, Marija",
year = "2015",
abstract = "A search for a massive W gauge boson decaying to a top quark and a bottom quark is performed with the ATLAS detector in pp collisions at the LHC. The datasetwas taken at a centre-of-mass energy of root s = 8 TeV and corresponds to 20.3 fb(-1) of integrated luminosity. This analysis is done in the hadronic decay mode of the top quark, where novel jet substructure techniques are used to identify jets from high-momentum top quarks. This allows for a search for high-mass W bosons in the range 1.5-3.0 TeV. b-tagging is used to identify jets originating from b-quarks. The data are consistent with Standard Model background-only expectations, and upper limits at 95% confidence level are set on the W - GT tb cross section times branching ratio ranging from 0.16 pb to 0.33 pb for left-handed W bosons, and ranging from 0.10 pb to 0.21 pb for W bosons with purely righthanded couplings. Upper limits at 95% confidence level are set on the W-boson coupling to tb as a function of the W mass using an effective field theory approach, which is independent of details of particular models predicting a W boson.",
journal = "European Physical Journal C. Particles and Fields",
title = "Search for W - GT tb - GT qqbb decays in pp collisions at root s=8 TeV with the ATLAS detector",
volume = "75",
number = "4",
doi = "10.1140/epjc/s10052-015-3372-2"
}

Aad, G., Agatonović-Jovin, T., Ćirković, P., Dimitrievska, A., Krstić, J., Mamužić, J., Marjanović, M., Popović, D. S., Sijacki, Dj., Simić, Lj., Vranješ, N.,& Vranješ Milosavljević, M.. (2015). Search for W - GT tb - GT qqbb decays in pp collisions at root s=8 TeV with the ATLAS detector. in European Physical Journal C. Particles and Fields, 75(4).
https://doi.org/10.1140/epjc/s10052-015-3372-2

Aad G, Agatonović-Jovin T, Ćirković P, Dimitrievska A, Krstić J, Mamužić J, Marjanović M, Popović DS, Sijacki D, Simić L, Vranješ N, Vranješ Milosavljević M. Search for W - GT tb - GT qqbb decays in pp collisions at root s=8 TeV with the ATLAS detector. in European Physical Journal C. Particles and Fields. 2015;75(4).
doi:10.1140/epjc/s10052-015-3372-2 .

Aad, G., Agatonović-Jovin, Tatjana, Ćirković, Predrag, Dimitrievska, A., Krstić, Jelena, Mamužić, Judita, Marjanović, M., Popović, D. S., Sijacki, Dj., Simić, Lj., Vranješ, Nenad, Vranješ Milosavljević, Marija, "Search for W - GT tb - GT qqbb decays in pp collisions at root s=8 TeV with the ATLAS detector" in European Physical Journal C. Particles and Fields, 75, no. 4 (2015),
https://doi.org/10.1140/epjc/s10052-015-3372-2 . .