Improved Bethe-Heitler formula
نویسندگان
چکیده
منابع مشابه
The Bethe-Heitler Process as a Source of Muons
in high-energy photon interactions with a nucleus A, as recently suggested in [7] (slide 23). Of course, muon-pair production by this process is suppressed relative to electron-positron pair production by the ratio (me/mμ) 2 ≈ 1/40, 000, so there is an issue of the efficiency of muon production via reaction (1). The Bethe-Heitler process (1) is further suppressed near threshold, so it would be ...
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We calculate the Bethe–Heitler cross section for the production of lepton pairs in the field of a longitudinally polarized nucleon, taking into account the lepton masses and the target mass. This process is a dominant background to the detection of open charm from semi-leptonic decay modes, which is a potential probe of the polarized gluon distribution in the nucleon. The knowledge on the spin ...
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Studying the Bethe–Salpeter formalism for interactions instantaneous in the rest frame of the bound states described, we show that, for bound-state constituents of arbitrary masses, the mass of the ground state of a given spin may be calculated almost entirely analytically with high accuracy, without the (numerical) diagonalization of the matrix representation obtained by expansion of the solut...
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We present calculations of the spectral and temporal radiative signatures expected from ultrarelativistic protons in compact sources. The coupling between the protons and the leptonic component is assumed to occur via Bethe-Heitler pair production. This process is treated by modeling the results of Monte-Carlo simulations and incorporating them in a time-dependent kinetic equation, that we subs...
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Although a local modification of the usual alcohol-glycerinephenol-formaldehyde embalming formula has proved generally satisfactory through the years, continued price advances in the principal items of this formula led to its re-examination from a number of standpoints. A first consideration was the investigation of the possibility of substitutes for those items, such as ethanol and glycerine, ...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2020
ISSN: 0550-3213
DOI: 10.1016/j.nuclphysb.2020.114958