269 research outputs found
Gluon polarization tensor in color magnetic background
In SU(2) gluodynamics we calculate the gluon polarization tensor in an
Abelian homogeneous magnetic field in one-loop order in the Lorentz background
field gauge. It turned out to be non transversal and consisting of ten tensor
structures and corresponding form factors - four in color neutral and six in
color charged sector. Seven tensor structures are transversal, three are not.
The non transversal parts are obtained by explicit calculation. We represent
the form factors in terms of double parametric integrals which can be computed
numerically. Some examples are provided and possible applications are
discussed.Comment: A number of misprints is correcte
The polarization tensor of neutral gluons in external fields at high temperature
The one-loop polarization operator of neutral gluons in the background
constant Abelian isotopic, , and hypercharge, , chromomagnetic
fields combined with electrostatic potential at high temperature is
calculated. The case when is investigated separately. The proper time
method is applied. It is found that neutral gluons do not acquire magnetic
masses in the background fields, in contrast to the charged ones. The
application of the results are discussed.Comment: 13 pages, 1 figur
Anomalous Magnetic Moment of W-boson at high temperature
By the Schwinger proper-time method, the one-loop contribution to the
anomalous magnetic moment of the W-boson is calculated at high temperature. It
is shown that the value of AMM is positive and depends linearly upon
temperature
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