267 research outputs found
A note on Higgs decays into boson and
Rare decays with denoting the narrow or
resonances, such as or states, have been analyzed. Within
the standard model, these channels may proceed through the tree-level
transition with the virtual , and also loop-induced
process , followed by . Our analysis shows that,
for the bottomonium final states, the decay rate of from the
loop-induced process is small and the former transition gives the dominant
contribution; while, for the charmonium final states,
and induced by could be
comparable to the contribution given by the tree-level
transition.Comment: 6 pages, 2 figure
Intrinsic Regularization Method in QCD
There exist certain intrinsic relations between the ultraviolet divergent
graphs and the convergent ones at the same loop order in renormalizable quantum
field theories. Whereupon we may establish a new method, the intrinsic
regularization method, to regularize those divergent graphs. In this paper, we
apply this method to QCD at the one loop order. It turns out to be
satisfactory:The gauge invariance is preserved manifestly and the results are
the same as those derived by means of other regularization methods.Comment: 18 pages, LaTeX , 7 figures in a separate compressed postscript fil
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