Search for a supersymmetric partner to the top quark in final states with jets and missing transverse momentum at √s = 7 TeV with the ATLAS detector

0441710 - FZÚ 2015 RIV US eng J - Článek v odborném periodiku
Aad, G. - Abajyan, T. - Abbott, B. - Böhm, Jan - Chudoba, Jiří - Gallus, Petr - Gunther, Jaroslav - Jakoubek, Tomáš - Juránek, Vojtěch - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Marčišovský, Michal - Mikeštíková, Marcela - Myška, Miroslav - Němeček, Stanislav - Růžička, Pavel - Schovancová, Jaroslava - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Tic, Tomáš - Valenta, J. - Vrba, Václav - Zeman, Martin … celkem 2890 autorů
Search for a supersymmetric partner to the top quark in final states with jets and missing transverse momentum at √s = 7 TeV with the ATLAS detector.
Physical Review Letters. Roč. 109, č. 21 (2012), "211802-1"-"211802-20". ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA MŠMT LA08032
Institucionální podpora: RVO:68378271
Klíčová slova: transverse momentum * missing-energy * scattering * ATLAS * top * decay * final state * ((n)jet) * sparticle * mass * experimental results * CERN
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 7.943, rok: 2012

A search for direct pair production of supersymmetric top squarks ((t) over tilde (1)) is presented, assuming the (t) over tilde (1) decays into a top quark and the lightest supersymmetric particle, (chi) over tilde (0)(1), and that both top quarks decay to purely hadronic final states. A total of 16 (4) events are observed compared to a predicted standard model background of 13.5(-3.6)(+3.7) (4.4(-1.3)(+1.7)) events in two signal regions based on integral Ldt = 4.7 fb(-1) of pp collision data taken at root s = 7 TeV with the ATLAS detector at the LHC. An exclusion region in the (t) over tilde (1) versus (chi) over tilde (0)(1) mass plane is evaluated: 370 < m(<(t)over tilde>1) < 465 GeV is excluded for m(<(chi)over tilde>10) similar to 0 GeV while m((t) over tilde1) = 445 GeV is excluded for m((chi) over tilde 10) <= 50 GeV.
Trvalý link: http://hdl.handle.net/11104/0244667