We report on an improved measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase γ through a Dalitz plot analysis of neutral D meson decays to KS0π+π- and KS0K+K- produced in the processes B →DK, B →D*K with D*→Dπ0, Dγ, and B →DK* with K* →KS0π. Using a sample of 383×106 BB̄ pairs collected by the BABAR detector, we measure γ=(76±22±5±5)° (mod 180°), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty on the description of the Dalitz plot distributions. The corresponding 2-standard-deviation region is 29°<122°. This result has a significance of direct CP violation (γ ≠0) of 3.0 standard deviations.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Improved measurement of the CKM angle γ in B →d(*) K(*) decays with a Dalitz plot analysis of D decays to KS0π+π- and KS0K+K-. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 78(3) [10.1103/PhysRevD.78.034023].

Improved measurement of the CKM angle γ in B →d(*) K(*) decays with a Dalitz plot analysis of D decays to KS0π+π- and KS0K+K-

CARPINELLI, Massimo;
2008

Abstract

We report on an improved measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase γ through a Dalitz plot analysis of neutral D meson decays to KS0π+π- and KS0K+K- produced in the processes B →DK, B →D*K with D*→Dπ0, Dγ, and B →DK* with K* →KS0π. Using a sample of 383×106 BB̄ pairs collected by the BABAR detector, we measure γ=(76±22±5±5)° (mod 180°), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty on the description of the Dalitz plot distributions. The corresponding 2-standard-deviation region is 29°<122°. This result has a significance of direct CP violation (γ ≠0) of 3.0 standard deviations.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2008
78
3
034023
none
Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Improved measurement of the CKM angle γ in B →d(*) K(*) decays with a Dalitz plot analysis of D decays to KS0π+π- and KS0K+K-. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 78(3) [10.1103/PhysRevD.78.034023].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389636
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