Non-perturbative formulation of the static color octet potential
نویسندگان
چکیده
منابع مشابه
The non-perturbative QCD potential
The potential between heavy quarks can be rigorously defined in a QCD effective field theories framework. I discuss the general situation when the coupling constant may not be considered small and provide an explicit expression for the potential valid up to order 1/m. Spin dependent and spin independent terms are expressed in terms of Wilson loops, completing an ideal journey started twenty yea...
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The static singlet potential between a heavy quark and an antiquark is an object of considerable interest both theoretically and phenomenologically. Strictly speaking, the potential being a dynamical quantity, it can be defined only in a context where the full dynamics of the system is consistently taken into account, for instance, in the proper Schrödinger equation. Nevertheless, the static si...
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Gluon fragmentation represents the dominant source of high energy prompt quarkonia at hadron colliders. Fragmentation approximations break down, however, when a quarkonium’s transverse momentum becomes comparable to its mass. In this paper, we identify a large class of color-octet diagrams that mediate quarkonia production at all energies and reduce to the dominant set of gluon fragmentation gr...
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Many new-physics models, especially those with a color-triplet top-quark partner, contain a heavy color-octet state. The “naturalness” argument for a light Higgs boson requires that the color-octet state be not much heavier than a TeV, and thus it can be pair-produced with large cross sections at high-energy hadron colliders. It may decay preferentially to a top quark plus a top partner, which ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2002
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(02)01777-x