We measure the masses of b hadrons in exclusively reconstructed final states containing a J/psi ->mu(-)mu(+) decay using 220 pb(-1) of data collected by the CDF II experiment. We find: m(B(+))=5279.10 +/- 0.41((stat.))+/- 0.36((sys.)) MeV/c(2), m(B(0))=5279.63 +/- 0.53((stat.))+/- 0.33((sys.)) MeV/c(2), m(B(s)(0))=5366.01 +/- 0.73((stat.))+/- 0.33((sys.)) MeV/c(2), m(Lambda(0)(b))=5619.7 +/- 1.2((stat.))+/- 1.2((sys.)) MeV/c(2). m(B(+))-m(B(0))=-0.53 +/- 0.67((stat.))+/- 0.14((sys.)) MeV/c(2), m(B(s)(0))-m(B(0))=86.38 +/- 0.90((stat.))+/- 0.06((sys.)) MeV/c(2), m(Lambda(0)(b))-m(B(0))=339.2 +/- 1.4((stat.))+/- 0.1((sys.)) MeV/c(2). The measurements of the B(s)(0), Lambda(0)(b) mass, m(B(s)(0))-m(B(0)) and m(Lambda(0)(b))-m(B(0)) mass difference are of better precision than the current world averages.
Measurement of bottom-quark hadron masses in exclusive J/psi decays with the CDF detector RID G-1087-2011 RID E-4473-2011
MORELLO, MICHAEL JOSEPH;
2006
Abstract
We measure the masses of b hadrons in exclusively reconstructed final states containing a J/psi ->mu(-)mu(+) decay using 220 pb(-1) of data collected by the CDF II experiment. We find: m(B(+))=5279.10 +/- 0.41((stat.))+/- 0.36((sys.)) MeV/c(2), m(B(0))=5279.63 +/- 0.53((stat.))+/- 0.33((sys.)) MeV/c(2), m(B(s)(0))=5366.01 +/- 0.73((stat.))+/- 0.33((sys.)) MeV/c(2), m(Lambda(0)(b))=5619.7 +/- 1.2((stat.))+/- 1.2((sys.)) MeV/c(2). m(B(+))-m(B(0))=-0.53 +/- 0.67((stat.))+/- 0.14((sys.)) MeV/c(2), m(B(s)(0))-m(B(0))=86.38 +/- 0.90((stat.))+/- 0.06((sys.)) MeV/c(2), m(Lambda(0)(b))-m(B(0))=339.2 +/- 1.4((stat.))+/- 0.1((sys.)) MeV/c(2). The measurements of the B(s)(0), Lambda(0)(b) mass, m(B(s)(0))-m(B(0)) and m(Lambda(0)(b))-m(B(0)) mass difference are of better precision than the current world averages.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
