Zobrazeno 1 - 10
of 438
pro vyhledávání: '"Schweda M"'
Publikováno v:
JHEP0511:041,2005
The divergence structure of non-commutative gauge field theories (NCGFT) with a Slavnov extension is examined at one-loop level with main focus on the gauge boson self-energy. Using an interpolating gauge we show that even with this extension the qua
Externí odkaz:
http://arxiv.org/abs/hep-th/0510100
Publikováno v:
JHEP 0507 (2005) 071
IR divergences of a non-commutative U(1) Maxwell theory are discussed at the one-loop level using an interpolating gauge to show that quadratic IR divergences are independent not only from a covariant gauge fixing but also independent from an axial g
Externí odkaz:
http://arxiv.org/abs/hep-th/0506117
The gauge independence in connection with the UV/IR-mixing is discussed with the help of the non-commutative U(1)-gauge field model proposed by A. A. Slavnov with two different gauges: the covariant gauge fixing defined via a gauge parameter \alpha a
Externí odkaz:
http://arxiv.org/abs/hep-th/0502198
Publikováno v:
Czech.J.Phys. 54 (2004) 711-719
In this letter we will dicuss the possibility of a resummation procedure in order to cure the UV/IR-mixing problem of noncommutative field theories. The method is presented for a scalar phi^4 theory on Euclidean space. Finally, we sketch the idea of
Externí odkaz:
http://arxiv.org/abs/hep-th/0302038
Publikováno v:
Int.J.Mod.Phys. A19 (2004) 5615-5624
We discuss the different possibilities of constructing the various energy-momentum tensors for noncommutative gauge field models. We use Jackiw's method in order to get symmetric and gauge invariant stress tensors--at least for commutative gauge fiel
Externí odkaz:
http://arxiv.org/abs/hep-th/0210288
Publikováno v:
Eur.Phys.J.C29:133-141,2003
As argued previously, amplitudes of quantum field theories on noncommutative space and time cannot be computed using naive path integral Feynman rules. One of the proposals is to use the Gell-Mann--Low formula with time-ordering applied before perfor
Externí odkaz:
http://arxiv.org/abs/hep-th/0209253
Autor:
Bichl, A. A., Ertl, M., Gerhold, A., Grimstrup, J. M., Grosse, H., Popp, L., Putz, V., Schweda, M., Wulkenhaar, R.
Publikováno v:
Int.J.Mod.Phys. A19 (2004) 4231-4250
The quantization of the non-commutative N=1, U(1) super-Yang-Mills action is performed in the superfield formalism. We calculate the one-loop corrections to the self-energy of the vector superfield. Although the power-counting theorem predicts quadra
Externí odkaz:
http://arxiv.org/abs/hep-th/0203141
Autor:
Grimstrup, J. M., Grosse, H., Popp, L., Putz, V., Schweda, M., Wickenhauser, M., Wulkenhaar, R.
Publikováno v:
Europhys.Lett. 67 (2004) 186-190
We analyse the IR-singularities that appear in a noncommutative scalar quantum field theory on $\mathcal{E}_4$. We demonstrate with the help of the quadratic one-loop effective action and an appropriate field redefinition that no IR-singularities exi
Externí odkaz:
http://arxiv.org/abs/hep-th/0202093
We discuss $\theta$-deformed Maxwell theory at first order in $\theta$ with the help of the Seiberg-Witten (SW) map. With an appropriate field redefinition consistent with the SW-map we analyse the one-loop corrections of the vacuum polarization of p
Externí odkaz:
http://arxiv.org/abs/hep-th/0202092
Publikováno v:
Phys.Rev. D66 (2002) 025027
Topological field theories of Schwarz-type generally admit symmetries whose algebra does not close off-shell, e.g. the basic symmetries of BF models or vector supersymmetry of the gauge-fixed action for Chern-Simons theory (this symmetry being at the
Externí odkaz:
http://arxiv.org/abs/hep-th/0111258