Zobrazeno 1 - 10
of 175
pro vyhledávání: '"Kuehn, J. H."'
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
We extend the ${\cal O}(\alpha_s^5)$ result of the analytic calculation of the quark mass anomalous dimension in pQCD [1] to the case of a generic gauge group. We present explicit formulas which express the relevant renormalization constants in terms
Externí odkaz:
http://arxiv.org/abs/1702.01458
Publikováno v:
Phys. Rev. Lett. 118, 082002 (2017)
We analytically compute the five-loop term in the beta function which governs the running of $\alpha_s$ --- the quark-gluon coupling constant in QCD. The new term leads to a reduction of the theory uncertainty in $\alpha_s$ taken at the Z-boson scale
Externí odkaz:
http://arxiv.org/abs/1606.08659
This is a short review of recent developments in calculation of higher order corrections to various two-point correlators and related quantities in (massless) QCD.
Comment: Material presented at the final Workshop of Sonderforschungsbereich Tran
Comment: Material presented at the final Workshop of Sonderforschungsbereich Tran
Externí odkaz:
http://arxiv.org/abs/1501.06739
We report first results of an ongoing project devoted to the analytical calculation of the QCD $\beta$-function and the quark mass anomalous dimension at the five loop level.
Comment: 7 pages, to appear in the proccedings of the 11th Internation
Comment: 7 pages, to appear in the proccedings of the 11th Internation
Externí odkaz:
http://arxiv.org/abs/1402.6606
We present the results of the first complete analytic calculation of the quark mass and field anomalous dimensions to ${\cal O}(\alpha_s^5)$ in QCD.
Externí odkaz:
http://arxiv.org/abs/1402.6611
Autor:
Czyż, H., Denig, A., Eidelman, S., Hu, H., Jegerlehner, F., Kloss, B., Kühn, J. H., Kupsc, A., Kuraev, E. A., Masjuan, P., Müller, S. E., Ping, R. G, Redmer, C. F., Roig, P., Sanchez-Puertas, P., Shekhovtsova, O., Spiesberger, H., Tomasi-Gustafsson, E., Teubner, T., Vanderhaeghen, M., Venanzoni, G., Wang, Y.
The mini-proceedings of the Workshop on "Constraining the hadronic contributions to the muon anomalous magnetic moment" which included the "13th meeting of the Radio MonteCarLow WG" and the "Satellite meeting R-Measurements at BES-III" held in Trento
Externí odkaz:
http://arxiv.org/abs/1306.2045
Publikováno v:
Phys.Rev. D91 (2015) 1, 014020
Weak corrections for top-quark pair production at hadron colliders are revisited. Predictions for collider energies of 8 TeV, adopted to the recent LHC run, and for 13 as well as 14 TeV, presumably relevant for the next round of LHC experiments, are
Externí odkaz:
http://arxiv.org/abs/1305.5773
We report on our calculation of the order \alpha_s^4 axial singlet contributions for the decay rates of the Z-boson as well as the vector singlet contribution to the cross section for electron-positron annihilation into hadrons. Together with recentl
Externí odkaz:
http://arxiv.org/abs/1210.3594
Publikováno v:
JHEP 1207 (2012) 017
We present a concise summary of recent results for the vector correlator in massless QCD at order ${\cal O}(\alpha_s^4)$, with all colour factors being given for a generic colour group. As a direct consequence we arrive at: (i) the full QCD contribut
Externí odkaz:
http://arxiv.org/abs/1206.1284