Based on a sample of 227x10(6) B(B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the branching fraction B(B-0→π(0)π(0))=(1.17± 0.32± 0.10)x10(-6), and the asymmetry C-π(0)π(0)=-0.12± 0.56± 0.06. The B-0→π(0)π(0) signal has a significance of 5.0σ. We also measure B(B+→π(+)π(0))=(5.8± 0.6± 0.4)x10(-6), B(B+→ K+π(0))=(12.0± 0.7± 0.6)x10(-6), and the charge asymmetries A(π)(+)π(0)=-0.01± 0.10± 0.02 and A(K)(+)π(0)=0.06± 0.06± 0.01. Using isospin relations, we find an upper bound on the angle difference |α-α(eff)| of 35° at the 90% C.L. RI de Groot, Nicolo/A-2675-2009; Patrignani, Claudia/C-5223-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Sarti, Alessio/I-2833-2012; Monge, Maria Roberta/G-9127-2012

Branching fractions and CP asymmetries in B-0 ->pi(0)pi(0), B+->pi(+)pi(0), and B+-> K+pi(0) decays and isospin analysis of the B ->pi pi system

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

Abstract

Based on a sample of 227x10(6) B(B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the branching fraction B(B-0→π(0)π(0))=(1.17± 0.32± 0.10)x10(-6), and the asymmetry C-π(0)π(0)=-0.12± 0.56± 0.06. The B-0→π(0)π(0) signal has a significance of 5.0σ. We also measure B(B+→π(+)π(0))=(5.8± 0.6± 0.4)x10(-6), B(B+→ K+π(0))=(12.0± 0.7± 0.6)x10(-6), and the charge asymmetries A(π)(+)π(0)=-0.01± 0.10± 0.02 and A(K)(+)π(0)=0.06± 0.06± 0.01. Using isospin relations, we find an upper bound on the angle difference |α-α(eff)| of 35° at the 90% C.L. RI de Groot, Nicolo/A-2675-2009; Patrignani, Claudia/C-5223-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Sarti, Alessio/I-2833-2012; 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 Pous, E; Palano, A; Pompili, A; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/188202
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