Evidence is presented for the associated production of a single top quark and W boson in pp collisions at root s = 7 TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 4.9 fb(-1). The measurement is performed using events with two leptons and a jet originated from a b quark. A multivariate analysis based on kinematic properties is utilized to separate the t (t) over bar background from the signal. The observed signal has a significance of 4.0 sigma and corresponds to a cross section of 16(-4)(+5) pb, in agreement with the standard model expectation of 15.6 +/- 0.4(-1.2)(+1.0) pb. DOI: 10.1103/PhysRevLett.110.022003
Evidence for Associated Production of a Single Top Quark and W Boson in pp Collisions at root s=7 TeV
ABBRESCIA, Marcello;BARBONE, LUCIA;CALABRIA, CESARE;CHHIBRA, SIMRANJIT SINGH;COLALEO, ANNA;DE PALMA, Mauro;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;MARANGELLI, Bartolomeo;MY, Salvatore;NUZZO, Salvatore Vitale;POMPILI, ALEXIS;PUGLIESE, GABRIELLA M. I.;SELVAGGI, Giovanna;SINGH, GURPREET;VENDITTI, ROSAMARIA;ZITO, GIUSEPPE;
2013-01-01
Abstract
Evidence is presented for the associated production of a single top quark and W boson in pp collisions at root s = 7 TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 4.9 fb(-1). The measurement is performed using events with two leptons and a jet originated from a b quark. A multivariate analysis based on kinematic properties is utilized to separate the t (t) over bar background from the signal. The observed signal has a significance of 4.0 sigma and corresponds to a cross section of 16(-4)(+5) pb, in agreement with the standard model expectation of 15.6 +/- 0.4(-1.2)(+1.0) pb. DOI: 10.1103/PhysRevLett.110.022003I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
