We present measurements of the branching fraction and CP-violating asymmetries in the decay B0 → f0(980)K s0. The results are obtained from a data sample of 123 × 106 Y(4S) → BB̄ decays. From a time-dependent maximum likelihood fit, we measure the branching fraction B(B0 → f0(980)(→ π+ π-)K0) = (6.0 ± 0.9 ± 0.6 ± 1.2) × 10-6, the mixing-induced CP violation parameter S = -1.62-0.51+0.56 ± 0.09 ± 0.04, and the direct CP violation parameter C = 0.27 ± 0.36 ± 0.10 ± 0.07, where the first errors are statistical, the second systematic, and the third due to model uncertainties. We measure the f0 (980) mass and width to be mf(980) = (980.6±4.1± 0.5±4.0)MeV/c2 and Γf0(980) = (43-9+12±3±9) MeV/c2, respectively.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Gaillard, J., Hicheur, A., et al. (2005). Measurements of the branching fraction and CP-violation asymmetries in B0 f0(980)KS0. PHYSICAL REVIEW LETTERS, 94(4) [10.1103/PhysRevLett.94.041802].

Measurements of the branching fraction and CP-violation asymmetries in B0 f0(980)KS0

CARPINELLI, Massimo;
2005

Abstract

We present measurements of the branching fraction and CP-violating asymmetries in the decay B0 → f0(980)K s0. The results are obtained from a data sample of 123 × 106 Y(4S) → BB̄ decays. From a time-dependent maximum likelihood fit, we measure the branching fraction B(B0 → f0(980)(→ π+ π-)K0) = (6.0 ± 0.9 ± 0.6 ± 1.2) × 10-6, the mixing-induced CP violation parameter S = -1.62-0.51+0.56 ± 0.09 ± 0.04, and the direct CP violation parameter C = 0.27 ± 0.36 ± 0.10 ± 0.07, where the first errors are statistical, the second systematic, and the third due to model uncertainties. We measure the f0 (980) mass and width to be mf(980) = (980.6±4.1± 0.5±4.0)MeV/c2 and Γf0(980) = (43-9+12±3±9) MeV/c2, respectively.
Articolo in rivista - Articolo scientifico
Approximation theory; Calorimeters; Drift chambers; Elementary particles; Matrix algebra; Maximum likelihood estimation; Neural networks; Resonance; Branching fraction; Electromagnetic calorimeters (EMC); Particle identification (PID); Quasi two body (Q2B) approach; High energy physics;
English
2005
94
4
041802
none
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Gaillard, J., Hicheur, A., et al. (2005). Measurements of the branching fraction and CP-violation asymmetries in B0 f0(980)KS0. PHYSICAL REVIEW LETTERS, 94(4) [10.1103/PhysRevLett.94.041802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389855
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