Measurement of bottom-quark hadron masses in exclusive J/ψ decays with the CDF detector
Journal
Physical Review Letters
Journal Volume
96
Journal Issue
20
Date Issued
2006
Author(s)
Acosta, D. et al. (The CDF Collaboration)
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.
Type
journal article