Photon energy spectrum in B → XS + γ and comparison with data
نویسندگان
چکیده
منابع مشابه
Measurement of B ( B ! Xs ) , the B ! Xs photon energy spectrum , and the direct CP asymmetry in B ! Xs þ d decays
J. P. Lees, V. Poireau, V. Tisserand, J. Garra Tico, E. Grauges, A. Palano, G. Eigen, B. Stugu, D.N. Brown, L. T. Kerth, Yu. G. Kolomensky, G. Lynch, H. Koch, T. Schroeder, D. J. Asgeirsson, C. Hearty, T. S. Mattison, J. A. McKenna, R. Y. So, A. Khan, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, V. B. Golubev, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, ...
متن کاملPhoton Energy Spectrum in B -+ X, + y and comparison with Data
A comparison of the inclusive photon energy spectrum in the radiative decay B + X, + y, measured recently by the CLEO collaboration, with the standard model is presented, using a B-meson wave function model and improving earlier perturbative QCD-based computations of the same. The dependence of the photon energy spectrum on the non-perturbative model -parameters, PF, the b-quark Fermi momentum ...
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J. P. Lees, V. Poireau, V. Tisserand, J. Garra Tico, E. Grauges, A. Palano, G. Eigen, B. Stugu, D.N. Brown, L. T. Kerth, Yu. G. Kolomensky, G. Lynch, H. Koch, T. Schroeder, D. J. Asgeirsson, C. Hearty, T. S. Mattison, J. A. McKenna, R. Y. So, A. Khan, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, V. B. Golubev, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, ...
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چکیده ندارد.
Long distance effects on the B → X s γ photon energy spectrum
We compute long distance effects on the photon energy spectrum in inclusive radiative decays of B mesons using light-cone expansion and heavy quark effective theory. We show that for sufficiently high photon energy the leading nonperturbative QCD contribution is attributed to the distribution function. The distribution function is found to be universal in the sense that the same distribution fu...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1995
ISSN: 0370-2693
DOI: 10.1016/0370-2693(95)01118-a