Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Dütsch, Michael"'
Autor:
Duetsch, Michael
Extending local gauge tansformations in a suitable way to Faddeev-Popov ghost fields, one obtains a symmetry of the total action, i.e., the Yang-Mills action plus a gauge fixing term (in a lambda-gauge) plus the ghost action. The anomalous Master War
Externí odkaz:
http://arxiv.org/abs/2409.10122
Autor:
Duetsch, Michael
Perturbative QFT is developed in terms of off-shell fields (that is, functionals on the configuration space not restricted by any field equation), and by quantizing the (underlying) free theory by an $\hbar$-dependent deformation of the classical pro
Externí odkaz:
http://arxiv.org/abs/2306.17698
The C*-algebraic construction of QFT by Buchholz and one of us relies on the causal structure of spacetime and a classical Lagrangian. In one of our previous papers we have introduced additional structure into this construction, namely an action of s
Externí odkaz:
http://arxiv.org/abs/2210.05908
The C*-algebraic formulation of generic interacting quantum field theories, recently presented by Detlev Buchholz and one of the authors (KF), is enriched by a unitary version of the Master Ward Identity, which was postulated some time ago by Franz M
Externí odkaz:
http://arxiv.org/abs/2108.13336
We extend the $C^*$-algebraic approach to interacting quantum field theory, proposed recently by Detlev Buchholz and one of us (KF) to Fermi fields. The crucial feature of our approach is the use of auxiliary Grassmann variables in a functorial way.<
Externí odkaz:
http://arxiv.org/abs/2103.05740
Publikováno v:
Eur. Phys. J. C (2021) 81:131
We revisit a nearly ten-year old controversy on the diphoton decay of the Higgs particle. To a large extent, the controversy turned around the respective merits of the regularization techniques employed. The novel aspect of our approach is that no re
Externí odkaz:
http://arxiv.org/abs/2011.12675
It is emphasized that for interactions with derivative couplings, the Ward Identity (WI) securing the preservation of a global U(1) symmetry should be modified. Scalar QED is taken as an explicit example. More precisely, it is rigorously shown in sca
Externí odkaz:
http://arxiv.org/abs/2008.08514
Autor:
Duetsch, Michael
Usually the Lagrangian of a model for massive vector bosons is derived in a geometric way by the Higgs mechanism. We investigate whether this geometric structure is maintained under the renormalization group (RG) flow. Using the framework of Epstein-
Externí odkaz:
http://arxiv.org/abs/1502.00099
Autor:
Duetsch, Michael
Publikováno v:
Rev. Math. Phys. 27 (10), (2015), 15500245
The usual derivation of the Lagrangian of a model for massive vector bosons, by spontaneous symmetry breaking of a gauge theory, implies that the prefactors of the various interaction terms are uniquely determined functions of the coupling constant(s
Externí odkaz:
http://arxiv.org/abs/1501.02599