We measure the masses of b hadrons in exclusively reconstructed final states containing a J/ψ→μ-μ+ decay using 220pb-1 of data collected by the CDF II experiment. We find: m(B+)=5279.10±0.41(stat.) ±0.36(sys.)MeV/c2, m(B0)=5279.63±0.53(stat.)±0.33(sys.)MeV/ c2, m(Bs0)=5366.01±0.73(stat.)±0.33(sys.)MeV/c2, m(Λb0)=5619.7±1.2(stat.)±1.2(sys.)MeV/c2. m(B+)-m(B0)=-0.53±0.67(stat.)±0.14(sys.)MeV/c2, m(Bs0)-m(B0)=86.38±0.90(stat.)±0.06(sys.)MeV/c2, m(Λb0)-m(B0)=339.2±1.4(stat.)±0.1(sys.)MeV/c2. The measurements of the Bs0, Λb0 mass, m(Bs0)-m(B0) and m(Λb0)-m(B0) mass difference are of better precision than the current world averages. © 2006 The American Physical Society.
Measurement of bottom-quark hadron masses in exclusive J/ψ decays with the CDF detector
Piacentino G.;
2006-01-01
Abstract
We measure the masses of b hadrons in exclusively reconstructed final states containing a J/ψ→μ-μ+ decay using 220pb-1 of data collected by the CDF II experiment. We find: m(B+)=5279.10±0.41(stat.) ±0.36(sys.)MeV/c2, m(B0)=5279.63±0.53(stat.)±0.33(sys.)MeV/ c2, m(Bs0)=5366.01±0.73(stat.)±0.33(sys.)MeV/c2, m(Λb0)=5619.7±1.2(stat.)±1.2(sys.)MeV/c2. m(B+)-m(B0)=-0.53±0.67(stat.)±0.14(sys.)MeV/c2, m(Bs0)-m(B0)=86.38±0.90(stat.)±0.06(sys.)MeV/c2, m(Λb0)-m(B0)=339.2±1.4(stat.)±0.1(sys.)MeV/c2. The measurements of the Bs0, Λb0 mass, m(Bs0)-m(B0) and m(Λb0)-m(B0) mass difference are of better precision than the current world averages. © 2006 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.