We present results for the branching fractions and charge asymmetries in B+/--->h(+/-)pi(0) (where h(+/-)=pi(+/-),K+/-) and a search for the decay B-0-->pi(0)pi(0) using a sample of approximately 88x10(6) B (B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure B(B+/--->pi(+/-)pi(0))=(5.5(-0.9)(+1.0)+/-0.6)x10(-6), where the first error is statistical and the second is systematic. The B+/--->pi(+/-)pi(0) signal has a significance of 7.7sigma including systematic uncertainties. We simultaneously measure the K(+/-)pi(0) branching fraction to be B(B+/--->K(+/-)pi(0))=(12.8(-1.1)(+1.2)+/-1.0)x10(-6). The charge asymmetries are A(pi +/- pi 0)=-0.03(-0.17)(+0.18)+/-0.02 and A(K +/- pi 0)=-0.09+/-0.09+/-0.01. We place a 90% confidence-level upper limit on the branching fraction B(B-0-->pi(0)pi(0)) of 3.6x10(-6) .

Aubert, B., Barate, R., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., et al. (2003). Observation of the decay B± → π±π0, study of B± → K±π0, and search for B0 → π0 π0. PHYSICAL REVIEW LETTERS, 91(2), 1-4 [10.1103/PhysRevLett.91.021801].

Observation of the decay B± → π±π0, study of B± → K±π0, and search for B0 → π0 π0

CARPINELLI, Massimo;
2003

Abstract

We present results for the branching fractions and charge asymmetries in B+/--->h(+/-)pi(0) (where h(+/-)=pi(+/-),K+/-) and a search for the decay B-0-->pi(0)pi(0) using a sample of approximately 88x10(6) B (B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure B(B+/--->pi(+/-)pi(0))=(5.5(-0.9)(+1.0)+/-0.6)x10(-6), where the first error is statistical and the second is systematic. The B+/--->pi(+/-)pi(0) signal has a significance of 7.7sigma including systematic uncertainties. We simultaneously measure the K(+/-)pi(0) branching fraction to be B(B+/--->K(+/-)pi(0))=(12.8(-1.1)(+1.2)+/-1.0)x10(-6). The charge asymmetries are A(pi +/- pi 0)=-0.03(-0.17)(+0.18)+/-0.02 and A(K +/- pi 0)=-0.09+/-0.09+/-0.01. We place a 90% confidence-level upper limit on the branching fraction B(B-0-->pi(0)pi(0)) of 3.6x10(-6) .
Articolo in rivista - Articolo scientifico
Calorimeters; Cerenkov counters; Decomposition; Electron energy levels; Errors; Kinematics; Mathematical models; Matrix algebra; Optimization; Particle detectors; Photons; Cabibbo-Kobayashi-Maskawa quark mixing matrix; Detector of internally reflected Cherenkov light; Electromagnetic calorimeter; Hadronic final states; Kaons; Meson; Pions; Charged particles;
English
2003
91
2
1
4
021801
none
Aubert, B., Barate, R., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., et al. (2003). Observation of the decay B± → π±π0, study of B± → K±π0, and search for B0 → π0 π0. PHYSICAL REVIEW LETTERS, 91(2), 1-4 [10.1103/PhysRevLett.91.021801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390007
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