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

CIOCCI, MARIA AGNESE;DONATI, SIMONE;
2006-01-01

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.
2006
D., Acosta; J., Adelman; T., Affolder; T., Akimoto; M. G., Albrow; D., Ambrose; S., Amerio; D., Amidei; A., Anastassov; K., Anikeev; A., Annovi; J., A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/828909
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