We present a study of the decay B-→D(CP)0K- and its charge conjugate, where D(CP)0 is reconstructed in both a non-CP flavor eigenstate and in CP (CP-even and CP-odd) eigenstates, based on a sample of 382 million Υ(4S)→BB̄ decays collected with the BABAR detector at the PEP-II e+e- storage ring. We measure the direct CP asymmetries ACP± and the ratios of the branching fractions RCP±: ACP+=0.27±0.09(stat) ±0.04(syst), ACP-=-0.09±0.09(stat)±0.02(syst), RCP+=1.06±0.10(stat)±0.05(syst), RCP-=1.03±0.10(stat) ±0.05(syst). We also express the results in terms of the so-called Cartesian coordinates x+, x-, and r2: x+=-0.09±0.05(stat)±0. 02(syst), x-=0.10±0.05(stat)±0.03(syst), r2=0.05±0.07(stat) ±0.03(syst). These results will help to better constrain the phase parameter γ=arg (-VudVub*/VcdVcb*) of the Cabibbo-Kobayashi- Maskawa quark mixing matrix. © 2008 The American Physical Society.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J.P., Poireau, V., Prencipe, E., et al. (2008). Improved measurement of CP observables in B±→DCP0K± decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 77(11), 1-8 [10.1103/PhysRevD.77.111102].

Improved measurement of CP observables in B±→DCP0K± decays

PATRIGNANI, CLAUDIA;
2008

Abstract

We present a study of the decay B-→D(CP)0K- and its charge conjugate, where D(CP)0 is reconstructed in both a non-CP flavor eigenstate and in CP (CP-even and CP-odd) eigenstates, based on a sample of 382 million Υ(4S)→BB̄ decays collected with the BABAR detector at the PEP-II e+e- storage ring. We measure the direct CP asymmetries ACP± and the ratios of the branching fractions RCP±: ACP+=0.27±0.09(stat) ±0.04(syst), ACP-=-0.09±0.09(stat)±0.02(syst), RCP+=1.06±0.10(stat)±0.05(syst), RCP-=1.03±0.10(stat) ±0.05(syst). We also express the results in terms of the so-called Cartesian coordinates x+, x-, and r2: x+=-0.09±0.05(stat)±0. 02(syst), x-=0.10±0.05(stat)±0.03(syst), r2=0.05±0.07(stat) ±0.03(syst). These results will help to better constrain the phase parameter γ=arg (-VudVub*/VcdVcb*) of the Cabibbo-Kobayashi- Maskawa quark mixing matrix. © 2008 The American Physical Society.
2008
Aubert, B., Bona, M., Karyotakis, Y., Lees, J.P., Poireau, V., Prencipe, E., et al. (2008). Improved measurement of CP observables in B±→DCP0K± decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 77(11), 1-8 [10.1103/PhysRevD.77.111102].
Aubert, B; Bona, M.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; Tico, J. Garra; Grauges, E.; Lopez, L.; Palano...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/548197
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