This Letter presents a search for pair production of heavy down-type quarks decaying via b??????Wt in the lepton+jets channel, as b???b?? ??????W-tW+t?? ???bb?? W+W-W+W-???l±??bb?? qq?? qq?? qq?? . In addition to requiring exactly one lepton, large missing transverse momentum, and at least six jets, the invariant mass of nearby jet pairs is used to identify high transverse momentum W bosons. In data corresponding to an integrated luminosity of 1.04??????fb-1 from pp collisions at ???s=7??????TeV recorded with the ATLAS detector, a heavy down-type quark with mass less than 480 GeV can be excluded at the 95% confidence level.
Search for down-type fourth generation quarks with the ATLAS detector in events with one lepton and hadronically decaying W bosons / Aad, G., Aloisio, A., Alviggi, M., Canale, V., Cevenini, F., Chiefari, G., DELLA VOLPE, D., Merola, L., Patricelli, S., Conventi, F., DELLA PIETRA, M., Giordano, R., Musto, E., Rossi, E., SANCHEZ PINEDA, A.R., Carlino, G., de Asmundis, R., Di Donato, C., Doria, A., Iengo, P., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 109:(2012), pp. 1-19. [10.1103/PhysRevLett.109.032001]
Search for down-type fourth generation quarks with the ATLAS detector in events with one lepton and hadronically decaying W bosons
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
This Letter presents a search for pair production of heavy down-type quarks decaying via b??????Wt in the lepton+jets channel, as b???b?? ??????W-tW+t?? ???bb?? W+W-W+W-???l±??bb?? qq?? qq?? qq?? . In addition to requiring exactly one lepton, large missing transverse momentum, and at least six jets, the invariant mass of nearby jet pairs is used to identify high transverse momentum W bosons. In data corresponding to an integrated luminosity of 1.04??????fb-1 from pp collisions at ???s=7??????TeV recorded with the ATLAS detector, a heavy down-type quark with mass less than 480 GeV can be excluded at the 95% confidence level.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
