Quark-antiquark potential in QCD
نویسندگان
چکیده
منابع مشابه
The Static Quark-Antiquark Potential in QCD to Three Loops
The static potential between an infinitely heavy quark and antiquark is derived in the framework of perturbative QCD to three loops by performing a full calculation of the two-loop diagrams and using the renormalization group. The contribution of massless fermions is included. The force law between infinitely heavy quarks has been investigated since more than 20 years because of its importance ...
متن کاملQuark-antiquark potential in the analytic approach to QCD
The quark-antiquark potential is constructed by making use of a new analytic running coupling in QCD. This running coupling arises under “analytization” of the renormalization group equation. The rising behavior of the quarkantiquark potential at large distances, which provides the quark confinement, is shown explicitly. At small distances, the standard behavior of this potential originating in...
متن کاملQCD Box Graphs and the Quark-Antiquark Potential
The tt̄ system allows a truly perturbative treatment of the potential. Completing previous computations, we calculate the contributions of QCD box graph corrections, which make the “relativistic” O(α4) corrections in the non-Abelian case differ from the well known corrections of the same order in QED. PACS: 11.10S, 11.15, 12.10D, 12.38, 14.40G CERN-TH/96-27 TUW-96-02 February 1996 [email protected]...
متن کامل- quark - antiquark potential
We calculate the leading mass-suppressed two-loop contribution, proportional to αs/(mqr 2), to the potential of a heavy quark-antiquark system. This contribution originates in the nonabelian nature of quantum chromodynamics (QCD) and has no analogue in quantum electrodynamics (QED). For this purpose, we elaborate a technique based on the implementation of the threshold expansion within the effe...
متن کاملStatic quark-antiquark potential in the quark-gluon plasma from lattice QCD.
We present a state-of-the-art determination of the complex valued static quark-antiquark potential at phenomenologically relevant temperatures around the deconfinement phase transition. Its values are obtained from nonperturbative lattice QCD simulations using spectral functions extracted via a novel Bayesian inference prescription. We find that the real part, both in a gluonic medium, as well ...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1977
ISSN: 0550-3213
DOI: 10.1016/0550-3213(77)90026-8