Dalitz plot analysis of B- -> D pi(-)pi(-)

作者：Aubert B^*; Bona M; Karyotakis Y; Lees J P; Poireau V; Prencipe E; Prudent X; Tisserand V; Garra Tico J; Grauges E; Lopez L; Palano A; Pappagallo M; Eigen G; Stugu B; Sun L; Abrams G S; Battaglia M; Brown D N; Jacobsen R G; Kerth L T; Kolomensky Yu G; Lynch G; Osipenkov I L; Ronan M T; Tackmann K; Tanabe T; Hawkes C M; Soni N; Watson A T; Koch H; Schroeder T; Asgeirsson D J; Fulsom B G; Hearty C; Mattison T S

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2009, 79(11): 112004.

DOI：10.1103/PhysRevD.79.112004

We report on a Dalitz plot analysis of B- -> D pi(-)pi(-) decays, based on a sample of about 383 x 10(6) Y(4S) -> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We find the total branching fraction of the three-body decay: B(B- -> D pi(-)pi(-)) = (1.08 /- 0.03 /- 0.05) x 10(-3). We observe the established D-2*(0) and confirm the existence of D-0*(0) in their decays to D pi(-), where the D-2*(0) and D-0*(0) are the 2( ) and 0( ) c (u) over bar P-wave states, respectively. We measure the masses and widths of D-2*(0) and D-0*(0) to be: m(D2)*(0) = (2460.4 /- 1.2 /- 1.2 /- 1.9) MeV/c(2), Gamma(D2*0) = (41.8 /- 2.5 /- 2.1 /- 2.0) MeV, m(D0*0) = (2297 /- 8 /- 5 /- 19) MeV/c(2), and Gamma(D0*0) = (273 /- 12 /- 17 /- 45) MeV. The stated errors reflect the statistical and systematic uncertainties, and the uncertainty related to the assumed composition of signal events and the theoretical model.

• 出版日期2009-6
• 单位中国地震局