We analyze the decay B0→K+π−π0 with a sample of 4.54×108 BB⎯⎯⎯ events collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC, and extract the complex amplitudes of seven interfering resonances over the Dalitz plot. These results are combined with amplitudes measured in B0→K0Sπ+π− decays to construct isospin amplitudes from B0→K∗π and B0→ρK decays. We measure the phase of the isospin amplitude Φ3/2, useful in constraining the Cabibbo-Kobayashi-Maskawa unitarity triangle angle γ and evaluate a CP rate asymmetry sum rule sensitive to the presence of new physics operators. We measure direct CP violation in B0→K*+π− decays at the level of 3σ when measurements from both B0→K+π−π0 and B0→K0Sπ+π− decays are combined.

Lees, J.P., Poireau, V., Prencipe, E., Tisserand, V., Garra Tico, J., Grauges, E., et al. (2011). Amplitude analysis of B(0) -> K(+) pi(-) pi(0) and evidence of direct CP violation in B -> K * pi decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 83(11), 1-21 [10.1103/PhysRevD.83.112010].

Amplitude analysis of B(0) -> K(+) pi(-) pi(0) and evidence of direct CP violation in B -> K * pi decays

PATRIGNANI, CLAUDIA;
2011

Abstract

We analyze the decay B0→K+π−π0 with a sample of 4.54×108 BB⎯⎯⎯ events collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC, and extract the complex amplitudes of seven interfering resonances over the Dalitz plot. These results are combined with amplitudes measured in B0→K0Sπ+π− decays to construct isospin amplitudes from B0→K∗π and B0→ρK decays. We measure the phase of the isospin amplitude Φ3/2, useful in constraining the Cabibbo-Kobayashi-Maskawa unitarity triangle angle γ and evaluate a CP rate asymmetry sum rule sensitive to the presence of new physics operators. We measure direct CP violation in B0→K*+π− decays at the level of 3σ when measurements from both B0→K+π−π0 and B0→K0Sπ+π− decays are combined.
2011
Lees, J.P., Poireau, V., Prencipe, E., Tisserand, V., Garra Tico, J., Grauges, E., et al. (2011). Amplitude analysis of B(0) -> K(+) pi(-) pi(0) and evidence of direct CP violation in B -> K * pi decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 83(11), 1-21 [10.1103/PhysRevD.83.112010].
Lees, J. P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Milanes, D. A.; Palano, A.; Pappagallo, M.; Eigen,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/543531
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