We present measurements of the branching fractions B(B-0 -> D*- D-s(*+)) and B(D-s(+) -> phi pi(+)), based on 123 x 10(6) Upsilon(4S) -> B (B) over bar decays collected by the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) B factory. A partial reconstruction technique is used to measure B(B-0 -> D*- D-s(*+)) and the decay chain is fully reconstructed to measure the branching fraction product B(B-0 -> D*- D-s(*+)) x B(D-s(+) -> phi pi(+)). Comparing these two measurements provides a model-independent determination of the D-s(+) -> phi pi(+) branching fraction. We obtain B(B-0 -> D*- D-s(*+)) = (1.88 +/- 0.09 +/- 0.17)% and B(D-s(+) -> phi pi(+)) = (4.81 +/- 0.52 +/- 0.38)%, where the first uncertainties are statistical and the second systematic.

Measurement of the B-0 -> D*- D-s(*+) and D-s(+)-> phi pi(+) branching fractions

ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;CALDERINI, GIOVANNI;FORTI, FRANCESCO;GIORGI, MARCELLO;PAOLONI, EUGENIO;RIZZO, GIULIANA;
2005-01-01

Abstract

We present measurements of the branching fractions B(B-0 -> D*- D-s(*+)) and B(D-s(+) -> phi pi(+)), based on 123 x 10(6) Upsilon(4S) -> B (B) over bar decays collected by the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) B factory. A partial reconstruction technique is used to measure B(B-0 -> D*- D-s(*+)) and the decay chain is fully reconstructed to measure the branching fraction product B(B-0 -> D*- D-s(*+)) x B(D-s(+) -> phi pi(+)). Comparing these two measurements provides a model-independent determination of the D-s(+) -> phi pi(+) branching fraction. We obtain B(B-0 -> D*- D-s(*+)) = (1.88 +/- 0.09 +/- 0.17)% and B(D-s(+) -> phi pi(+)) = (4.81 +/- 0.52 +/- 0.38)%, where the first uncertainties are statistical and the second systematic.
2005
Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, Jp; Poireau, V; Tisserand, V; Zghiche, A; Grauges Pous, E; Palano, A; Pappagallo, ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/183034
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