Summary
The bremsstrahlung calculations for the B → B′πγ decays cannot be considered to be adequate expecially when we have high-momentum photons and when the processes which are related to the ΔS=1 B → B′γ decays followed (or preceded) by the strong emission of a pion become important. We calculate the contributions to the rate of the B → B′πγ decays from these processes as well as the espressions for the πγ angular distribution due to this mechanism as well as due to bremsstrahlung.
Riassunto
I calcoli di bremsstrahlung per i decadimenti B → B′πγ non possono considerarsi sufficienti specialmente quando si hanno fotoni ad impulso elevato e quando i processi che sono in relazione con i decadimenti B → B′γ per ΔS=1, seguiti (o preceduti) dall’emissione forte di un pione, diventano importanti. Si calcola il contributo al tasso di decadimento B → B′πγ da parte di questi processi così come l’espressione per la distribuzione angolare di πγ dovuta a questo meccanismo e al bremsstrahlung.
Реэюме
Вычисления тормоэного иэлучения для распадов B → B′πγ не могут дать адекватного описания, когда мы имеем фотоны с больщими импульсами и когда становятся важными процессы, свяэанные с распадами B → B′γ с ΔS=1, с последуюшим (или с предществуюшим) испусканием пиона. Мы вычисляем вклады зтих процессов в интенсивность распадов B → B′πγ, а также выражения для πγ углового распределения, обусловленного зтим механиэмом и тормоэным иэлучением.
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Reference
K. Gavroglu andM. D. Scadron:Nuovo Cimento A,14, 812 (1973).
For details seeR. E. Marshak, Riazuddin andC. P. Ryan:Theory of Weak Interactions in Particle Physics (New York, N. Y., 1968), and references therein.
M. D. Scadron andL. Thebaud:Phys. Rev. D,5, 2306 (1972).
J. M. Gaillard: private communication. An excellent article presenting the experimental situation concerning the hyperons is byJ. Lach andL. Pondrom: to appear inAnn. Rev. Nucl. Part. Sci.,29 (December 1979). Also Fermilab preprint 79/25 Exp. 2085.00.
Some of the more interesting and relatively recent articles which study these decays areI. Raszillier andI. O. Stamatescu:Rev. Roum. Phys.,16, 63 (1971);B. Brook:Prog. Theor. Phys.,51, 1123 (1974);I. Raszillier andL. Burlacu:Z. Phys.,233, 471 (1970);V. I. Zakharov, L. A. Kondratyuk andL. A. Ponomarev:Sov. J. Nucl. Phys.,8, 60 (1969).
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Baltas, A., Gavroglu, K. & Photinos, D. Contributions of the B → B′γ process to the B → B′πγ decays. Nuov Cim A 56, 327–335 (1980). https://doi.org/10.1007/BF02730181
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DOI: https://doi.org/10.1007/BF02730181