Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-04-08
Mod.Phys.Lett.A21:1851-1863,2006
Physics
High Energy Physics
High Energy Physics - Theory
1+11 pages, 6 figures; v2: references added, typos corrected, conclusions unchanged
Scientific paper
10.1142/S021773230602113X
We study noncommutative field theories, which are inherently nonlocal, using a Poincar\'e-invariant regularisation scheme which yields an effective, nonlocal theory for energies below a cut-off scale. After discussing the general features and the peculiar advantages of this regularisation scheme for theories defined in noncommutative spaces, we focus our attention onto the particular case when the noncommutativity parameter is inversely proportional to the square of the cut-off, via a dimensionless parameter $\eta$. We work out the perturbative corrections at one-loop order for a scalar theory with quartic interactions, where the signature of noncommutativity appears in $\eta$-dependent terms. The implications of this approach, which avoids the problems related to UV-IR mixing, are discussed from the perspective of the Wilson renormalisation program. Finally, we remark about the generality of the method, arguing that it may lead to phenomenologically relevant predictions, when applied to realistic field theories.
Govindarajan T. R.
Kurkcuoglu Seckin
Panero Marco
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