Zobrazeno 1 - 10
of 159
pro vyhledávání: '"Nogradi Daniel"'
Autor:
Chung, Hee Sok, Nogradi, Daniel
Two particular ratios related to mesons are proposed for the study of the conformal window in $SU(3)$ gauge theory and fundamental fermions. Lattice and other studies indicate that the lower end, $N_f^*$, is at around 7 - 13 flavors which is a wide r
Externí odkaz:
http://arxiv.org/abs/2311.08668
Autor:
Chung, Hee Sok, Nogradi, Daniel
The $f_\varrho / m_\varrho$ ratio is calculated at N$^3$LO order within perturbative (p)NRQCD with $N_f$ flavors of mass degenerate fermions. The massless limit of the ratio is expanded \'a la Banks-Zaks in $\epsilon = 16.5 - N_f$ leading to reliable
Externí odkaz:
http://arxiv.org/abs/2302.06411
Publikováno v:
EPJ Web of Conferences, Vol 175, p 08027 (2018)
We describe a new method to determine non-perturbatively the beta function of a gauge theory using lattice simulations in the p-regime of the theory. This complements alternative measurements of the beta function working directly at zero fermion mass
Externí odkaz:
https://doaj.org/article/587b2f214c534c238f089570adaa6169
Publikováno v:
EPJ Web of Conferences, Vol 175, p 08014 (2018)
As part of our ongoing lattice study of SU(3) gauge theory with two flavors of fermions in the two-index symmetric representation (the sextet model), we present the current status of the pseudoscalar particle spectrum. We use a mixed action approach
Externí odkaz:
https://doaj.org/article/709ccf25c9754a2ea356326f1f5b2122
Publikováno v:
EPJ Web of Conferences, Vol 175, p 08015 (2018)
We discuss near-conformal gauge theories beyond the standard model (BSM) where interesting results on the twelve-flavor β-function of massless fermions in the fundamental representation of the SU(3) color gauge group and dilaton tests of the light s
Externí odkaz:
https://doaj.org/article/0a8024e8c619486cab8e41be2610c893
Publikováno v:
EPJ Web of Conferences, Vol 175, p 08028 (2018)
Results are reported for the β-function of weakly coupled conformal gauge theories on the lattice, SU(3) with Nf = 14 fundamental and Nf = 3 sextet fermions. The models are chosen to be close to the upper end of the conformal window where perturbati
Externí odkaz:
https://doaj.org/article/fa5f84a67c2e4d19992ba0fed85789ee
Autor:
Pasztor, Attila, Borsanyi, Szabolcs, Fodor, Zoltan, Giordano, Matteo, Katz, Sandor D., Nogradi, Daniel, Wong, Chik Him
Most lattice studies of hot and dense QCD matter rely on extrapolation from zero or imaginary chemical potentials. The ill-posedness of numerical analytic continuation puts severe limitations on the reliability of such methods. We studied the QCD chi
Externí odkaz:
http://arxiv.org/abs/2201.00887
Autor:
Pasztor, Attila, Borsanyi, Szabolcs, Fodor, Zoltan, Kapas, Kornel, Katz, Sandor D., Giordano, Matteo, Nogradi, Daniel, Wong, Chik Him
Approaches to finite baryon density lattice QCD usually suffer from uncontrolled systematic uncertainties in addition to the well-known sign problem. We test a method - sign reweighting - that works directly at finite chemical potential and is yet fr
Externí odkaz:
http://arxiv.org/abs/2112.02134
Autor:
Nogradi, Daniel, Ozsvath, Balint
Publikováno v:
SciPost Phys. 12, 169 (2022)
Spontaneous scale invariance breaking and the associated Goldstone boson, the dilaton, is investigated in renormalizable, unitary, interacting non-supersymmetric scalar field theories in $4-\varepsilon$ dimensions. At leading order it is possible to
Externí odkaz:
http://arxiv.org/abs/2109.09822
Autor:
Nogradi, Daniel
The most general local, classically scale invariant, perturbatively renormalizable, globally $SU(N)$ invariant Lagrangian is constructed for spin-1 fields in 4 dimensions. The total number of independent couplings is 7 and the 1-loop $\beta$-function
Externí odkaz:
http://arxiv.org/abs/2109.09535