We report on a search for the CP asymmetry in the singly Cabibbo-suppressed decays D+→K-K+π+ and in the resonant decays D+→π+ and D+→K̄*0K+ based on a data sample of 79.9fb-1 recorded by the BABAR detector. We use the Cabibbo-favored Ds+→K-K+π+ branching fraction as normalization in the measurements to reduce systematic uncertainties. The CP asymmetries obtained are ACP(K-K+π±)=(1.4±1.0(stat)±0. 8(syst))×10-2, ACP(π±)=(0.2±1.5(stat)±0.6(syst)) ×10-2, and ACP(K̄*0K±)=(0.9±1.7(stat)±0. 7(syst))×10-2. The relative branching fraction Γ(D+→K-K+π+)/ Γ(D+→K-π+π+) is also measured and is found to be (10.7±0.1(stat)±0.2(syst))×10-2.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Search for CP violation and a measurement of the relative branching fraction in D+→K-K+π+ decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 71(9), 1-8 [10.1103/PhysRevD.71.091101].

Search for CP violation and a measurement of the relative branching fraction in D+→K-K+π+ decays

CARPINELLI, Massimo;
2005

Abstract

We report on a search for the CP asymmetry in the singly Cabibbo-suppressed decays D+→K-K+π+ and in the resonant decays D+→π+ and D+→K̄*0K+ based on a data sample of 79.9fb-1 recorded by the BABAR detector. We use the Cabibbo-favored Ds+→K-K+π+ branching fraction as normalization in the measurements to reduce systematic uncertainties. The CP asymmetries obtained are ACP(K-K+π±)=(1.4±1.0(stat)±0. 8(syst))×10-2, ACP(π±)=(0.2±1.5(stat)±0.6(syst)) ×10-2, and ACP(K̄*0K±)=(0.9±1.7(stat)±0. 7(syst))×10-2. The relative branching fraction Γ(D+→K-K+π+)/ Γ(D+→K-π+π+) is also measured and is found to be (10.7±0.1(stat)±0.2(syst))×10-2.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2005
1
8
8
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Search for CP violation and a measurement of the relative branching fraction in D+→K-K+π+ decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 71(9), 1-8 [10.1103/PhysRevD.71.091101].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389868
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