A search for direct pair production of supersymmetric top squarks (t??1) is presented, assuming the t??1 decays into a top quark and the lightest supersymmetric particle, ????01, 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+3.7???3.6(4.4+1.7???1.3) events in two signal regions based on ???Ldt=4.7??????fb???1 of pp collision data taken at s???=7??????TeV with the ATLAS detector at the LHC. An exclusion region in the t??1 versus ????01 mass plane is evaluated: 370<mt??1<465??????GeV is excluded for m????01???0??????GeV while mt??1=445??????GeV is excluded for m????01???50??????GeV.
Search for a supersymmetric partner to the top quark in final states with jets and missing transverse momentum at sqrt(s)=7TeV with the ATLAS detector / Aad, G.; Aloisio, Alberto; Alviggi, Mariagrazia; Canale, Vincenzo; Cevenini, Francesco; Chiefari, Giovanni; DELLA VOLPE, Domenico; Merola, Leonardo; Patricelli, Sergio; Conventi, Francesco; DELLA PIETRA, Massimo; Giordano, Raffaele; Musto, Elisa; Rossi, Elvira; SANCHEZ PINEDA, ARTURO RODOLFO; Carlino, Gianpaolo; de Asmundis, Riccardo; Di Donato, Camilla; Doria, Alessandra; Iengo, Paolo; Izzo, Vincenzo; Sekhniaidze, Givi; Al, e. t. .. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 109:211802(2012), pp. 1-18. [10.1103/PhysRevLett.109.211802]
Search for a supersymmetric partner to the top quark in final states with jets and missing transverse momentum at sqrt(s)=7TeV with the ATLAS detector
ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CANALE, VINCENZO;CHIEFARI, GIOVANNI;DELLA VOLPE, DOMENICO;MEROLA, LEONARDO;PATRICELLI, SERGIO;DELLA PIETRA, MASSIMO;GIORDANO, RAFFAELE;Rossi, Elvira;SANCHEZ PINEDA, ARTURO RODOLFO;
2012
Abstract
A search for direct pair production of supersymmetric top squarks (t??1) is presented, assuming the t??1 decays into a top quark and the lightest supersymmetric particle, ????01, 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+3.7???3.6(4.4+1.7???1.3) events in two signal regions based on ???Ldt=4.7??????fb???1 of pp collision data taken at s???=7??????TeV with the ATLAS detector at the LHC. An exclusion region in the t??1 versus ????01 mass plane is evaluated: 370I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
