Running electromagnetic-coupling constant: Low-energy normalization and the value at M Z
نویسندگان
چکیده
منابع مشابه
On the running electromagnetic coupling constant at MZ
We present a discussion on how to define the running electromagnetic coupling constant at MZ or some other intermediate scale as e.g. mΥ. We argue that a natural definition consistent with general requirements of the renormalization group should be based on Euclidean values of the momentum of the photon propagator as the appropriate scale. We demonstrate in an explicit example of evaluating the...
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Using an analogy between Bogomol'nyi bound and the harmonic oscillator in quantum mechanics we propose a possible explanation of the coupling constant numerical value at the grand unification scale. It is found to be 1/8π. According to the recent precise experiments [1], the running coupling constants do not meet in a single point in the standard model. Nevertheless, in its supersymmetric exten...
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ژورنال
عنوان ژورنال: Physics of Atomic Nuclei
سال: 2002
ISSN: 1063-7788,1562-692X
DOI: 10.1134/1.1495645