We have observed the decays B --> phiK and phiK* in a sample of over 45 million B mesons collected with the BABAR detector at the PEP-II collider. The measured branching fractions are B(B(+)--> phiK(+)) = (7.7(-1.4)(+1.6)+/-0.8) x 10(-6), B(B(0)--> phiK(0)) = (8.1(-2.5)(+3.1)+/-0.8) x 10(-6), B(B(+)--> phiK*(+)) = (9.7(-3.4)(+4.2)+/-1.7) x 10(-6), and B(B(0)--> phiK*(0)) = (8.7(-2.1)(+2.5)+/-1.1) x 10(-6). We also report the upper limit B(B(+)--> phi pi (+)) < 1.4 x 10(-6) (90% C.L.).

Measurement of the decays B ->phi K and B ->phi K - asterisk

PREST, MICHELA;
2001-01-01

Abstract

We have observed the decays B --> phiK and phiK* in a sample of over 45 million B mesons collected with the BABAR detector at the PEP-II collider. The measured branching fractions are B(B(+)--> phiK(+)) = (7.7(-1.4)(+1.6)+/-0.8) x 10(-6), B(B(0)--> phiK(0)) = (8.1(-2.5)(+3.1)+/-0.8) x 10(-6), B(B(+)--> phiK*(+)) = (9.7(-3.4)(+4.2)+/-1.7) x 10(-6), and B(B(0)--> phiK*(0)) = (8.7(-2.1)(+2.5)+/-1.1) x 10(-6). We also report the upper limit B(B(+)--> phi pi (+)) < 1.4 x 10(-6) (90% C.L.).
2001
BABAR; PEP-II collider; branching fraction of B decay
Aubert, B; Boutigny, D; Gaillard, Jm; Hicheur, A; Karyotakis, Y; Lees, Jp; Robbe, P; Tisserand, V; Palano, A; Chen, Gp; Chen, Jc; Qi, Nd; Rong, G; Wan...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/1791114
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