Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Schroder, Y."'
Publikováno v:
Phys. Rev. D 101, 023532 (2020)
The Debye mass sets a scale for the screening of static charges and the scattering of fast charges within a gauge plasma. Inspired by its potential cosmological applications, we determine a QCD Debye mass at 2-loop order in a broad temperature range
Externí odkaz:
http://arxiv.org/abs/1911.09123
Publikováno v:
JHEP 1805 (2018) 037
We analyze 3-loop contributions to the gauge coupling felt by ultrasoft ("magnetostatic") modes in hot Yang-Mills theory. So-called soft/hard terms, originating from dimension-six operators within the soft effective theory, are shown to cancel 1097/1
Externí odkaz:
http://arxiv.org/abs/1803.08689
Autor:
Luthe, T., Schroder, Y.
We provide an update on a long-term project that aims at evaluating massive vacuum integrals at the five-loop frontier, with high precision and in various space-time dimensions. A number of applications are sketched, mainly concerning the determinati
Externí odkaz:
http://arxiv.org/abs/1609.06786
Publikováno v:
Phys. Rev. D 95, 025005 (2017)
Recently, the existence of a candidate a-function for renormalisable theories in three dimensions was demonstrated for a general theory at leading order and for a scalar-fermion theory at next-to-leading order. Here we extend this work by constructin
Externí odkaz:
http://arxiv.org/abs/1609.06458
We renormalize the SU(N) Gross-Neveu model in the modified minimal subtraction (MSbar) scheme at four loops and determine the beta-function at this order. The theory ceases to be multiplicatively renormalizable when dimensionally regularized due to t
Externí odkaz:
http://arxiv.org/abs/1609.05071
Autor:
Ghisoiu, I., Schroder, Y.
We evaluate a new 3-loop sum-integral which contributes to the Debye screening mass in hot QCD. While we manage to derive all divergences analytically, its finite part is mapped onto simple integrals and evaluated numerically.
Comment: 15 pages
Comment: 15 pages
Externí odkaz:
http://arxiv.org/abs/1207.6214
Autor:
Schroder, Y.
In order to prepare the ground for evaluating classes of three-loop sum-integrals that are presently needed for thermodynamic observables, we take a fresh and systematic look on the few known cases, and review their evaluation in a unified way using
Externí odkaz:
http://arxiv.org/abs/1207.5666
Autor:
Nishimura, M., Schroder, Y.
We demonstrate the applicability of integration-by-parts (IBP) identities in finite-temperature field theory. As a concrete example, we perform 3-loop computations for the thermodynamic pressure of QCD in general covariant gauges, and confirm earlier
Externí odkaz:
http://arxiv.org/abs/1207.4042
Autor:
Maniatis, M., Schroder, Y.
Electroweak precision measurements, encoded in the oblique parameters, give strong constraints on physics beyond the Standard Model. The oblique parameters S, T, U (V, W, X) are calculated in the next-to-minimal supersymmetric model (NMSSM). We outli
Externí odkaz:
http://arxiv.org/abs/1207.0729
Perturbation theory for non-Abelian gauge theories at finite temperature is plagued by infrared divergences caused by magnetic soft modes $\sim g^2T$, which correspond to the fields of a 3d Yang-Mills theory. We revisit a gauge invariant resummation
Externí odkaz:
http://arxiv.org/abs/1203.6538