We study the decays B<sup>-</sup> → D*<sup>0</sup>π <sup>-</sup> and B<sup>-</sup>→ D*<sup>0</sup>K<sup>-</sup>, where the D*<sup>0</sup> decays into D<sup>0</sup>π<sup>0</sup>, with the D<sup>0</sup> reconstructed in the CP-even (CP+) eigenstates K<sup>-</sup>K <sup>+</sup> and π<sup>-</sup>π<sup>+</sup> and in the (non-CP) channels K<sup>-</sup>π<sup>+</sup>, K <sup>-</sup>π<sup>+</sup>π<sup>+</sup>π<sup>-</sup>, and K <sup>-</sup>π<sup>+</sup>π<sup>0</sup>. Using a sample of about 123 × 10<sup>6</sup> BB̄ pairs, we measure the ratios of decay rates R*<inf>non-CP</inf> ≡ B(B<sup>-</sup> → D* <inf>non-CP</inf><sup>0</sup>K<sup>-</sup>)/B(B<sup>-</sup> → D*<inf>non-CP</inf><sup>0</sup>π<sup>-</sup>) = 0.086 ± 0.0040(stat)<inf>-0.0031</inf><sup>+0.0042</sup>(syst), and provide the first measurements of R*<inf>CP+</inf> ≡ B(B<sup>-</sup> → D*<inf>CP+</inf><sup>0</sup>K<sup>-</sup>)/B(B<sup>-</sup> → D*<inf>CP+</inf><sup>0</sup>π<sup>-</sup>) = 0.0086 ± 0.021(stat) ± 0.007(syst), and of the CP asymmetry A*<inf>CP+</inf> ≡ B(B<sup>-</sup> → D*<inf>CP+</inf><sup>0</sup>K <sup>-</sup>)-B(B<sup>+</sup> → D*<inf>CP+</inf><sup>0</sup>K <sup>+</sup>)/B(B<sup>-</sup> → D*<inf>CP+</inf><sup>0</sup>K <sup>-</sup>)+B(B<sup>+</sup> → D*<inf>CP+</inf><sup>0</sup>K <sup>+</sup>) = 0.10 ± 0.23(stat)<inf>-0.04</inf><sup>+0.03</sup>(syst). © 2005 The American Physical Society.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Measurement of the ratio B(B<sup>-</sup> → D*<sup>0</sup>K <sup>-</sup>)/B(B → D*<sup>0</sup>π<sup>-</sup>) and of the CP asymmetry of B<sup>-</sup> → D*<inf>CP+</inf><sup>0</sup>K <sup>-</sup> decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 71(3), 1-8 [10.1103/PhysRevD.71.031102].

Measurement of the ratio B(B- → D*0K -)/B(B → D*0π-) and of the CP asymmetry of B- → D*CP+0K - decays

PATRIGNANI, CLAUDIA;
2005

Abstract

We study the decays B- → D*0π - and B-→ D*0K-, where the D*0 decays into D0π0, with the D0 reconstructed in the CP-even (CP+) eigenstates K-K + and π-π+ and in the (non-CP) channels K-π+, K -π+π+π-, and K -π+π0. Using a sample of about 123 × 106 BB̄ pairs, we measure the ratios of decay rates R*non-CP ≡ B(B- → D* non-CP0K-)/B(B- → D*non-CP0π-) = 0.086 ± 0.0040(stat)-0.0031+0.0042(syst), and provide the first measurements of R*CP+ ≡ B(B- → D*CP+0K-)/B(B- → D*CP+0π-) = 0.0086 ± 0.021(stat) ± 0.007(syst), and of the CP asymmetry A*CP+ ≡ B(B- → D*CP+0K -)-B(B+ → D*CP+0K +)/B(B- → D*CP+0K -)+B(B+ → D*CP+0K +) = 0.10 ± 0.23(stat)-0.04+0.03(syst). © 2005 The American Physical Society.
2005
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Measurement of the ratio B(B<sup>-</sup> → D*<sup>0</sup>K <sup>-</sup>)/B(B → D*<sup>0</sup>π<sup>-</sup>) and of the CP asymmetry of B<sup>-</sup> → D*<inf>CP+</inf><sup>0</sup>K <sup>-</sup> decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 71(3), 1-8 [10.1103/PhysRevD.71.031102].
Aubert, B; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Tisserand, V.; Zghiche, A.; Grauges-Pous, E.; Palano, A.; P...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/551704
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