منابع مشابه
0Kπ coupling constant in QCD
The strong coupling constant gK∗ 0 Kπ of the scalar K ∗ 0 meson decay to Kπ is calculated in light cone QCD sum rule. The predicted value of the coupling constant gK∗ 0 Kπ is in a good agreement with the experimental result. e-mail: [email protected] e-mail: [email protected]
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We work out the method for evaluating the QCD coupling constant at finite temperature (T ) by making use of the finite T renormalization group equation up to the one-loop order on the basis of the background field method with the imaginary time formalism. The background field method, which maintains the explicit gauge invariance, provides notorious simplifications since one has to calculate onl...
متن کاملgρσγ coupling constant in light cone QCD
The coupling constant gρσγ is determined from light cone QCD sum rules. A comparison of our result with the ones existing in literature is presented. PACS number(s): 11.55.Hx, 13.40.Hq, 14.40.Cs e-mail: [email protected] e-mail: [email protected] e-mail: [email protected]
متن کاملTHE STRONG gB ∗ ∗ Bπ COUPLING CONSTANT IN FULL QCD.
To leading order in α s , the leading and non-leading 1/m b corrections to the excited B * * meson coupling g B * * Bπ is calculated in the framework of QCD spectral moment sum rules in the full theory. Our prediction is in good agreement with the light − cone QCD sum rule result.
متن کاملLattice Simulations for the Running Coupling Constant of Qcd
The strong coupling constant αs(μ0), taken at a fixed reference scale μ0, is the single free parameter of QCD and should be known to the highest available precision. The value of αs should also be determined with good accuracy over as large a range of scales as possible, in order to reveal potential anomalous running in the strength of the strong interaction. Lattice QCD is now able to calculat...
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ژورنال
عنوان ژورنال: Annual Review of Nuclear and Particle Science
سال: 2000
ISSN: 0163-8998,1545-4134
DOI: 10.1146/annurev.nucl.50.1.643