Gauge-invariant top quark form factors frome+e−experiments
نویسندگان
چکیده
منابع مشابه
Kaon Photoproduction with Form Factors in a Gauge-invariant Approach
The general gauge-invariant photoproduction formalism given by Haberzettl is applied to kaon photoproduction off the nucleon at the tree level, with form factors describing composite nucleons. We demonstrate that, in contrast to Ohta’s gauge-invariance prescription, this formalism allows electric current contributions to be multiplied by a form factor, i.e., they do not need to be treated like ...
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We show how the gauge-invariance formulation given by Haberzettl is implemented in practice for photoproduction amplitudes at the tree level with form factors describing composite nucleons. We demonstrate that, in contrast to Ohta's gauge-invariance prescription, this formalism allows electric current contributions to be multiplied by a form factor, i.e., it does not require that they be treate...
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The QCD sum rules approach to non– perturbative phenomena in strong interaction physics consists in evaluating the power corrections of the product of two hadronic currents via the Operator Product Expansion (OPE), putting the relevant, unknown information about the non-perturbative vacuum structure in the values of local condensates (〈q̄(0)q(0)〉, 〈G(0)G(0)〉, etc.). However, it has been recogniz...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1994
ISSN: 0556-2821
DOI: 10.1103/physrevd.50.3059