RT Journal Article
T1 Unitarity Violation in non-Abelian Pauli-Villars Regularization
A1 Ruíz Ruíz, Fernando
A1 León, J.H.
A1 Martín, C.P.
AB We regularize QCD using the combination of higher covariant derivatives and Pauli-Villars determinants proposed by Slavnov. It is known that for pure Yang-Mills theory the Pauli-Villars determinants generate unphysical logarithmic radiative corrections at one loop that modify the beta function. Here we prove that when the gauge fields are coupled to fermions so that one has QCD, these unphysical corrections translate into a violation of unitarity. We provide an understanding of this by showing that Slavnov's choice for the Pauli-Villars determinants introduces extra propagating degrees of freedom that are responsible for the unitarity breaking. This shows that Slavnov's regularization violates unitarity, hence that it should be rejected.
PB Elsevier Science Bv
SN 0370-2693
YR 1995
FD 1995-08-03
LK https://hdl.handle.net/20.500.14352/59013
UL https://hdl.handle.net/20.500.14352/59013
LA eng
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RD 15 may 2024