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Gauge technique for heavy quarks


Delbourgo, R and Liu, DS, Gauge technique for heavy quarks, Physical Review D, 56, (1) pp. 27-31. ISSN 0556-2821 (1997) [Refereed Article]

DOI: doi:10.1103/PhysRevD.56.27


It is possible to determine an off-shell propagator for heavy quarks to order 1/m in mass and in any covariant gauge ξ, which applies universally to all the quarks, by using the gauge technique. Given a simple ansatz for the gluon propagator, the result for the leading behavior of the quark propagator is S(v·k) = "(1 + 2αξ)[(1 + γ·v)/2v·k](-v·k/Λ)2αξ 0 F2[1 + αξ,3/2 + αξ; αξ(v·k)2/3πΛ2], where v is the velocity of the particle containing the heavy quark, Λ is a QCD mass scale, and αξ≡ -α(2 + ξ)/3π. The above result is a totally reliable deduction from the assumed gluon propagator in the infrared limit (∼ 1/q2) and accounts for soft-gluon corrections for the fermion in internal loops.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Other physical sciences
Research Field:Other physical sciences not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Delbourgo, R (Professor Robert Delbourgo)
UTAS Author:Liu, DS (Dr Dongsheng Liu)
ID Code:10105
Year Published:1997
Web of Science® Times Cited:1
Deposited By:Physics
Deposited On:1997-08-01
Last Modified:2011-08-11

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