Zobrazeno 1 - 10
of 512
pro vyhledávání: '"Chetyrkin, K G"'
Conformal symmetry of QCD is restored at the Wilson-Fisher critical point in noninteger $4-2\epsilon$ space-time dimensions. Correlation functions of multiplicatively renormalizable operators with different anomalous dimensions at the critical point
Externí odkaz:
http://arxiv.org/abs/2205.08228
Autor:
Chetyrkin, K. G., Grozin, A. G.
Coefficient functions of the operator product expansion of correlators of HQET heavy--light quark currents are calculated up operators of dimension 4 up to to 3 loops.
Comment: 20 pages, 3 figures. v2: tiny text improvements
Comment: 20 pages, 3 figures. v2: tiny text improvements
Externí odkaz:
http://arxiv.org/abs/2111.14571
We consider the short-distance expansion of the product of two gluon field strength tensors connected by a straight-line-ordered Wilson line. The vacuum expectation value of this nonlocal operator is a common object in studies of the QCD vacuum struc
Externí odkaz:
http://arxiv.org/abs/2103.09478
Publikováno v:
JHEP 2007 (2020) 161
We argue that the renormalization factors for nonlocal quark-antiquark and gluon operators at space-like and time-like separations connected by a Wilson line coincide to all orders in perturbation theory. We calculate the anomalous dimensions and ren
Externí odkaz:
http://arxiv.org/abs/2004.01043
Autor:
Baikov, P. A., Chetyrkin, K. G.
We give a short account of recent advances in our understanding of the $\pi$-dependent terms in massless (Euclidean) 2-point functions as well as in generic anomalous dimensions (ADs) and $\beta$-functions. We extend the considerations of \cite{Baiko
Externí odkaz:
http://arxiv.org/abs/1908.03012
Autor:
d'Enterria, David, Kluth, Stefan, Alekhin, S., Baikov, P. A., Banfi, A., Barreiro, F., Bazavov, A., Bethke, S., Blümlein, J., Boito, D., Brambilla, N., Britzger, D., Brodsky, S. J., Camarda, S., Chetyrkin, K. G., d'Enterria, D., Brida, M. Dalla, Tormo, X. Garcia i, Golterman, M., Horsley, R., Huston, J., Jamin, M., Kardos, A., Keshavarzi, A., Kluth, S., Kühn, J., Maltman, K., Miravitllas, R., Moch, S. -O., Monni, P. F., Nomura, D., Onogi, T., Pérez-Ramos, R., Peris, S., Petreczky, P., Pires, J., Poldaru, A., Rabbertz, K., Ringer, F., Sint, S., Sommer, R., Somogyi, G., Soto, J., Szőr, Z., Takaura, H., Teubner, T., Trócsányi, Z., Tulipánt, Z., Vairo, A., Verbytskyi, A., Weber, J. H., Weichen, X., Zanderighi, G.
This document collects a written summary of all contributions presented at the workshop "$\alpha_s$(2019): Precision measurements of the strong coupling" held at ECT* (Trento) in Feb. 11--15, 2019. The workshop explored in depth the latest developmen
Externí odkaz:
http://arxiv.org/abs/1907.01435
Autor:
Baikov, P. A., Chetyrkin, K. G.
We provide the reader with a (very) short review of recent advances in our understanding of the $\pi$-dependent terms in massless (Euclidean) 2-point functions as well as in generic anomalous dimensions and $\beta$-functions. We extend the considerat
Externí odkaz:
http://arxiv.org/abs/1808.00237
Autor:
Baikov, P. A., Chetyrkin, K. G.
Extending an argument of [Baikov:2010hf] for the case of 5-loop massless propagators we prove a host of new exact model-independent relations between contributions proportional to odd and even zetas in generic \MSbar\ anomalous dimensions as well as
Externí odkaz:
http://arxiv.org/abs/1804.10088
The global R* operation is a powerful method for computing renormalisation group functions. This technique, based on the principle of infrared rearrangement, allows to express all the ultraviolet counterterms in terms of massless propagator integrals
Externí odkaz:
http://arxiv.org/abs/1801.03024
Recent developments in perturbative QCD, leading to the beta function in five-loop approximation are presented. In a first step the two most important decay modes of the Higgs boson are discussed: decays into a pair of gluons and, alternatively, deca
Externí odkaz:
http://arxiv.org/abs/1711.05592