The photon spectrum in B→Xsγ decay, where Xs is any strange hadronic state, is studied using a data sample of 88.5×106 e+e-→Υ(4S)→BB̄ decays collected by the BABAR experiment at the Stanford Linear Accelerator Center. The partial branching fraction, ΔB(B→Xsγ)=(3.67±0.29(stat)±0.34(syst)±0. 29(model))×10-4, the first moment Eγ=2.288±0.025±0. 017±0.015GeV, and the second moment Eγ2=0.0328±0. 0040±0.0023±0.0036GeV2 are measured for the photon energy range 1.9GeV

Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., et al. (2006). Measurement of the branching fraction and photon energy moments of B→Xsγ and ACP(B→Xs+dγ). PHYSICAL REVIEW LETTERS, 97(17) [10.1103/PhysRevLett.97.171803].

Measurement of the branching fraction and photon energy moments of B→Xsγ and ACP(B→Xs+dγ)

CARPINELLI, Massimo;
2006

Abstract

The photon spectrum in B→Xsγ decay, where Xs is any strange hadronic state, is studied using a data sample of 88.5×106 e+e-→Υ(4S)→BB̄ decays collected by the BABAR experiment at the Stanford Linear Accelerator Center. The partial branching fraction, ΔB(B→Xsγ)=(3.67±0.29(stat)±0.34(syst)±0. 29(model))×10-4, the first moment Eγ=2.288±0.025±0. 017±0.015GeV, and the second moment Eγ2=0.0328±0. 0040±0.0023±0.0036GeV2 are measured for the photon energy range 1.9GeV
Articolo in rivista - Articolo scientifico
Elementary particles; Extrapolation; High energy physics; Linear accelerators; Parameter estimation; Photons; Branching fraction; Photon energy; Photon spectrum; Quarks; Ground state;
English
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., et al. (2006). Measurement of the branching fraction and photon energy moments of B→Xsγ and ACP(B→Xs+dγ). PHYSICAL REVIEW LETTERS, 97(17) [10.1103/PhysRevLett.97.171803].
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