Using 230 x 10(6) B (B) over bar events recorded with the BABAR detector at the e(+)e(-) storage rings PEP-II, we reconstruct approximately 4100 B(0) -> J/psi K(+)pi(-) and 9930 B(+) -> J/psi K(+) decays with J/psi -> mu(+)mu(-) and e(+)e(-). From the measured B-momentum distributions in the e(+)e(-) rest frame, we determine the mass difference m(B(0)) - m(B(+)) = (+0.33 +/- 0.05 +/- 0.03) MeV/c(2).

Measurement of the mass difference m(B(0))-m(B(+)) RID C-5223-2009

LUSIANI, Alberto;
2008

Abstract

Using 230 x 10(6) B (B) over bar events recorded with the BABAR detector at the e(+)e(-) storage rings PEP-II, we reconstruct approximately 4100 B(0) -> J/psi K(+)pi(-) and 9930 B(+) -> J/psi K(+) decays with J/psi -> mu(+)mu(-) and e(+)e(-). From the measured B-momentum distributions in the e(+)e(-) rest frame, we determine the mass difference m(B(0)) - m(B(+)) = (+0.33 +/- 0.05 +/- 0.03) MeV/c(2).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/4917
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