Abstract
We study the emission of a hard photon in the spectator, free quark approximation ofB meson decays. We thus obtain an estimate for the high end of the photon spectrum in the processb→X u,c+γ and in the processesb→\(\bar c\)+X u,c+γ andb→l \(\bar v\)+X u,c+γ, whereX q=q+X. We show that the hard photon spectrum will allow to distinguish between decays via spectator and “annihilation” amplitudes, and could be used as well for an independent estimate of |V ub/V cb|. Further implications of our calculation are discussed.
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For a review of CKM fromB Physics, see for example, K.R. Schubert, in: Proc., of 1989 international conference on heavy quark physics, Ithaca NY, June 1989. Eds. P. Drell and D. Rubin, and references therein
G. Altarelli et al.: Nucl. Phys. B 208 (1982) 365
N. Isgur, D. Scora, B. Grinstein, M.B. Wise: Phys. Rev. D39 (1989) 799
G. Eilam, B. Margolis, R.R Mendel, A. Soni: Phys. Lett. 185B (1987) 145 We estimate that the results in that paper should be scaled down by roughly a factor of 6 (We were using |V cb|≃0.06 andf B/f π≈2.7)
D. Atwood, W. Marciano: Phys. Rev. D 41 (1990) 1736
See for example R. Rückl: Weak decays of heavy flavours, CERN preprint (1984)
Particle Data group, Phys. Lett. B239 (1990) 1
Y.S. Tsai: Phys. Rev. D19 (1979) 2809
H. Simma, D. Wyler: ETH preprint,. 1990
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Eilam, G., Mendel, R.R. & Migneron, R. Hard photon emission in spectatorB meson decays. Z. Phys. C - Particles and Fields 52, 145–148 (1991). https://doi.org/10.1007/BF01412337
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DOI: https://doi.org/10.1007/BF01412337