We report the observation of the decay B--> D(pi)(+)pi(-)pi(0)K(-), where D(pi)(+)pi(-)pi(0) indicates a neutral D meson detected in the final state pi(+)pi(-)pi(0), excluding K(S)(0)pi(0). This doubly Cabibbo-suppressed decay chain can be used to measure the CKM phase gamma. Using about 229x10(6) e(+)e(-)-> B (B) over bar events recorded by the BABAR experiment at the PEP-II e(+)e(-) storage ring, we measure the branching fraction B(B--> D(pi)(+)pi(-)pi(0)K(-))=(5.5 +/- 1.0(stat.)+/- 0.7(syst.))x10(-6) and the decay rate asymmetry A(B--> D(pi)(+)pi(-)pi(0)K(-))=-0.02 +/- 0.16(stat.)+/- 0.03(syst.) for the full decay chain. RI Peters, Klaus/C-2728-2008; Patrignani, Claudia/C-5223-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; Neri, Nicola/G-3991-2012; Monge, Maria Roberta/G-9127-2012

Measurement of the branching fraction and decay rate asymmetry of B--> D-pi(+)pi(-)pi K-0(-)

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

Abstract

We report the observation of the decay B--> D(pi)(+)pi(-)pi(0)K(-), where D(pi)(+)pi(-)pi(0) indicates a neutral D meson detected in the final state pi(+)pi(-)pi(0), excluding K(S)(0)pi(0). This doubly Cabibbo-suppressed decay chain can be used to measure the CKM phase gamma. Using about 229x10(6) e(+)e(-)-> B (B) over bar events recorded by the BABAR experiment at the PEP-II e(+)e(-) storage ring, we measure the branching fraction B(B--> D(pi)(+)pi(-)pi(0)K(-))=(5.5 +/- 1.0(stat.)+/- 0.7(syst.))x10(-6) and the decay rate asymmetry A(B--> D(pi)(+)pi(-)pi(0)K(-))=-0.02 +/- 0.16(stat.)+/- 0.03(syst.) for the full decay chain. RI Peters, Klaus/C-2728-2008; Patrignani, Claudia/C-5223-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; Neri, Nicola/G-3991-2012; Monge, Maria Roberta/G-9127-2012
2005
Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, Jp; Poireau, V; Tisserand, V; Zghiche, A; Grauges, E; Palano, A; Pappagallo, M; Po...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/182112
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