We report a measurement of resonance parameters of the orbitally excited (L=1) narrow B(0) mesons in decays to B((*)+)pi(-) using 1.7 fb(-1) of data collected by the CDF II detector at the Fermilab Tevatron. The mass and width of the B(2)(*0) state are measured to be m(B(2)(*0))=5740.2(-1.8)(+1.7)(stat)(-0.8)(+0.9)(syst) MeV/c(2) and Gamma(B(2)(*0))=22.7(-3.2)(+3.8)(stat)(-10.2)(+3.2)(syst) MeV/c(2). The mass difference between the B(2)(*0) and B(1)(0) states is measured to be 14.9(-2.5)(+2.2)(stat)(-1.4)(+1.2)(syst) MeV/c(2), resulting in a B(1)(0) mass of 5725.3(-2.2)(+1.6)(stat)(-1.5)(+1.4)(syst) MeV/c(2). This is currently the most precise measurement of the masses of these states and the first measurement of the B(2)(*0) width.
Measurement of Resonance Parameters of Orbitally Excited Narrow B(0) Mesons RID G-1087-2011 RID E-4473-2011
DELL'ORSO, MAURO;DONATI, SIMONE;PUNZI, GIOVANNI;
2009-01-01
Abstract
We report a measurement of resonance parameters of the orbitally excited (L=1) narrow B(0) mesons in decays to B((*)+)pi(-) using 1.7 fb(-1) of data collected by the CDF II detector at the Fermilab Tevatron. The mass and width of the B(2)(*0) state are measured to be m(B(2)(*0))=5740.2(-1.8)(+1.7)(stat)(-0.8)(+0.9)(syst) MeV/c(2) and Gamma(B(2)(*0))=22.7(-3.2)(+3.8)(stat)(-10.2)(+3.2)(syst) MeV/c(2). The mass difference between the B(2)(*0) and B(1)(0) states is measured to be 14.9(-2.5)(+2.2)(stat)(-1.4)(+1.2)(syst) MeV/c(2), resulting in a B(1)(0) mass of 5725.3(-2.2)(+1.6)(stat)(-1.5)(+1.4)(syst) MeV/c(2). This is currently the most precise measurement of the masses of these states and the first measurement of the B(2)(*0) width.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
