Search for W'→tb→qqbb decays in pp collisions at s√ = 8 TeV with the ATLAS detector

Ajuts: We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of EPLANET, ERC and NSRF, European Union, MINECO and PIC, Spain. Funded by SCOAP3. A search for a mas...

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Hauptverfasser:	Abdallah, J, Agustoni, M, Alpigiani, C, Anger, P, Atlay, Naim Bora, Battistin, M, Boonekamp, M, Brazzale, S. F, Brooijmans, G, Buehrer, F, Cameron, D, Capeans Garrido, M. D. M, Catastini, P, Cheatham, S, Cheu, E, Chilingarov, A, Colijn, A. P, Dabrowski, W, Durglishvili, A, Faltova, J, Farilla, A, Fuster, J, Gagnon, P, Gallo, V, Gemmell, A, Gentile, S, Gillberg, D, Gonzalez Parra, G, Gorini, B, Haddad, N, Hanagaki, K, Haug, S, Heelan, L, Horii, Y, Hoummada, A, Huffman, T. B, Iodice, M, Jain, V, Jeanty, L, Kehoe, R, Kessoku, K, Kiuchi, K, Klein, M, Koll, J, Kortner, O, Krasznahorkay, A, Kruchonak, U, Leonhardt, K, Lo Sterzo, F, Lopez Paredes, B, Lytken, E, Madaffari, D, Madar, R, Mal, P, Maleev, V. P, Malon, D, Mashimo, T, Masubuchi, T, McCubbin, N. A, Mohapatra, S, Moles-Valls, R, Monnier, E, Nemethy, P, Ntekas, K, Oh, S. H, Ohm, C. C, Okuyama, T, Padilla, Cristobal, Pagáčová, M, Paredes Hernandez, D, Pataraia, S, Pilkington, A. D, Pinto, B, Pires, S, Prieur, D, Qin, Y, Reece, R, Rossi, E, Schäfer, U, Schultens, M. J, Sekula, S. J, Skottowe, H. P, Smizanska, M, Soloshenko, A, Solovyev, V, Sopko, B, Tam, J. Y. C, Taylor, F. E, Unal, G, Wagner, W, Walder, J, Wenaus, T, Wilson, J. A, Wollstadt, S. J, Yatsenko, E, Ye, S, Yildirim, E, Zengel, K, Zhang, H, Zhao, Z
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Sprache:	eng
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Zusammenfassung:	Ajuts: We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of EPLANET, ERC and NSRF, European Union, MINECO and PIC, Spain. Funded by SCOAP3. A search for a massive gauge boson decaying to a top quark and a bottom quark is performed with the ATLAS detector in collisions at the LHC. The dataset was taken at a centre-of-mass energy of and corresponds to 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 bosons in the range 1.5-3.0 . -tagging is used to identify jets originating from -quarks. The data are consistent with Standard Model background-only expectations, and upper limits at 95 % confidence level are set on the cross section times branching ratio ranging from to for left-handed bosons, and ranging from to for bosons with purely right-handed couplings. Upper limits at 95 % confidence level are set on the -boson coupling to as a function of the mass using an effective field theory approach, which is independent of details of particular models predicting a boson.