Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-05-29
Int.J.Mod.Phys. A11 (1996) 571-612
Physics
High Energy Physics
High Energy Physics - Phenomenology
40 pages, 5 Figures to be added as uuencoded files; plain LaTeX
Scientific paper
10.1142/S0217751X96000274
The photon energy distribution in the inclusive b -> s+\gamma transitions is a combination of two components: the first component, soft physics, is determined by the so called primordial distribution function, while the second component, perturbative physics, is governed by the hard gluon emission. A simple ansatz is suggested for the primordial distribution function which obeys the QCD constraints known so far. We then discuss in detail how the hard gluon emission affects the energy distribution. An extension of the Sudakov approximation is worked out incorporating the Brodsky-Lepage-Mackenzie prescription and its generalizations. We explicitly calculate the marriage of nonperturbative with perturbative effects in the way required by OPE, introducing separation scale \mu. A few parameters, such as m_b and \mu_\pi^2 affect the shape of the distribution and, thus, can be determined by matching to the experimental data. The data, still scarce, while not giving precise values for these parameters, yield consistency with theory: the current values of the above parameters lie within experimental uncertainty. On the theoretical side we outline a method allowing one to go beyond the practical version of OPE.
Dikeman David R.
Shifman Michael
Uraltsev Nikolai G.
No associations
LandOfFree
b -> s +γ: A QCD Consistent Analysis of the Photon Energy Distribution does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with b -> s +γ: A QCD Consistent Analysis of the Photon Energy Distribution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and b -> s +γ: A QCD Consistent Analysis of the Photon Energy Distribution will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-481851