We present measurements of CP-violating asymmetries in the decay B0→a1±(1260)π with a1±(1260) →ππ±π±. The data sample corresponds to 384×106 BB̄ pairs collected with the BABAR detector at the PEP-II asymmetric B factory at SLAC. We measure the CP-violating asymmetry ACPa1π=-0.07±0. 07±0.02, the mixing-induced CP violation parameter Sa1π=0.37±0. 21±0.07, the direct CP violation parameter Ca1π=-0.10±0. 15±0.09, and the parameters ΔCa1π=0.26±0.15±0.07 and ΔSa1π=-0.14±0.21±0.06. From these measured quantities we determine the angle αeff=78.6°±7.3°.

Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2007). Measurements of CP-violating asymmetries in B0→a1±(1260)π decays. PHYSICAL REVIEW LETTERS, 98(18) [10.1103/PhysRevLett.98.181803].

Measurements of CP-violating asymmetries in B0→a1±(1260)π decays

CARPINELLI, Massimo;
2007

Abstract

We present measurements of CP-violating asymmetries in the decay B0→a1±(1260)π with a1±(1260) →ππ±π±. The data sample corresponds to 384×106 BB̄ pairs collected with the BABAR detector at the PEP-II asymmetric B factory at SLAC. We measure the CP-violating asymmetry ACPa1π=-0.07±0. 07±0.02, the mixing-induced CP violation parameter Sa1π=0.37±0. 21±0.07, the direct CP violation parameter Ca1π=-0.10±0. 15±0.09, and the parameters ΔCa1π=0.26±0.15±0.07 and ΔSa1π=-0.14±0.21±0.06. From these measured quantities we determine the angle αeff=78.6°±7.3°.
Articolo in rivista - Articolo scientifico
Charged particles; Continuum mechanics; Measurement theory; Particle detectors; BABAR detectors; CP violation parameters; CP-violating asymmetries; High energy physics;
English
2007
98
18
181803
none
Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2007). Measurements of CP-violating asymmetries in B0→a1±(1260)π decays. PHYSICAL REVIEW LETTERS, 98(18) [10.1103/PhysRevLett.98.181803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389665
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