Results 21 to 30 of about 396 (66)

The $O(\alpha^2)$ Initial State QED Corrections to $e^+e^-$ Annihilation to a Neutral Vector Boson Revisited [PDF]

, 2019
We calculate the non-singlet, the pure singlet contribution, and their interference term, at $O(\alpha^2)$ due to electron-pair initial state radiation to $e^+ e^-$ annihilation into a neutral vector boson in a direct analytic computation without any ...
Blümlein, J., De Freitas, A., Raab, C. G., Schönwald, K.   +3 more
core   +2 more sources

The $\rho$ parameter at three loops and elliptic integrals [PDF]

, 2018
We describe the analytic calculation of the master integrals required to compute the two-mass three-loop corrections to the $\rho$ parameter. In particular, we present the calculation of the master integrals for which the corresponding differential ...
Blümlein, J., De Freitas, A., Imamoglu, E., Marquard, P., Schneider, C., van Hoeij, M.   +5 more
core   +2 more sources

Recent progress on the calculation of three-loop heavy flavor Wilson coefficients in deep-inelastic scattering

, 2014
We report on our latest results in the calculation of the three-loop heavy flavor contributions to the Wilson coefficients in deep-inelastic scattering in the asymptotic region $Q^2 \gg m^2$.
Ablinger, A., Behring, A., Blümlein, J., De Freitas, A., Hasselhuhn, A., Raab, C., Round, M., Schneider, C., von Manteuffel, A., Wißbrock, F.   +9 more
core   +1 more source

How perturbative is quantum gravity? [PDF]

, 2019
We explore asymptotic safety of gravity-matter systems, discovering indications for a near-perturbative nature of these systems in the ultraviolet. Our results are based on the dynamical emergence of effective universality at the asymptotically safe ...
Eichhorn, Astrid, Lippoldt, Stefan, Pawlowski, Jan M., Reichert, Manuel, Schiffer, Marc   +4 more
core   +2 more sources

New Results on Massive 3-Loop Wilson Coefficients in Deep-Inelastic Scattering

, 2016
We present recent results on newly calculated 2- and 3-loop contributions to the heavy quark parts of the structure functions in deep-inelastic scattering due to charm and bottom.Comment: Contribution to the Proc.
Ablinger, J., Behring, A., Blümlein, J., De Freitas, A., Falcioni, G., Hasselhuhn, A., Round, M., Schneider, C., von Manteuffel, A., Wißbrock, F.   +9 more
core   +1 more source

Iterated Binomial Sums and their Associated Iterated Integrals [PDF]

, 2014
We consider finite iterated generalized harmonic sums weighted by the binomial $\binom{2k}{k}$ in numerators and denominators. A large class of these functions emerges in the calculation of massive Feynman diagrams with local operator insertions starting
't Hooft G., Blümlein J., Blümlein J., Bronstein M., C. G. Raab, C. Schneider, Geddes K. O., Hadamard J., Hermite Ch., J. Ablinger, J. Blümlein, Kauers M., Landau E., Lewin L., Mellin H., Nielsen N., Reutenauer C., Schneider C., Schneider C., Schwartz L., Schweber S. S.   +20 more
core   +1 more source

Heavy quark form factors at two loops in perturbative QCD [PDF]

, 2017
We present the results for heavy quark form factors at two-loop order in perturbative QCD for different currents, namely vector, axial-vector, scalar and pseudo-scalar currents, up to second order in the dimensional regularization parameter.
Ablinger, J., Behring, A., Blümlein, J., De Freitas, A., Falcioni, G., Marquard, P., Rana, N., Schneider, C.   +7 more
core   +2 more sources

3-Loop Corrections to the Heavy Flavor Wilson Coefficients in Deep-Inelastic Scattering

, 2016
A survey is given on the status of 3-loop heavy flavor corrections to deep-inelastic structure functions at large enough virtualities $Q^2$.Comment: 13 pages Latex, 8 Figures, Contribution to the Proceedings of EPS 2015 ...
Ablinger, J., Behring, A., Blümlein, J., De Freitas, A., Hasselhuhn, A., Raab, C. G., Round, M., Schneider, C., von Manteuffel, A., Wißbrock, F.   +9 more
core   +1 more source

Large scale analytic calculations in quantum field theories

, 2019
We present a survey on the mathematical structure of zero- and single scale quantities and the associated calculation methods and function spaces in higher order perturbative calculations in relativistic renormalizable quantum field theories.Comment: 25 ...
A Kratzer, A Sabry, A Smirnov, A von Manteuffel, AB Goncharov, AI Davydychev, AV Kotikov, AV Smirnov, AV Smirnov, AV Smirnov, C Anastasiou, C Bogner, C Krattenthaler, C Meyer, C Neumann, C Reutenauer, C Schneider, C Schneider, C Schneider, C Schneider, C Schneider, C Schneider, C Schneider, D Hilbert, E Landau, E Panzer, E Remiddi, E Remiddi, E Remiddi, EW Barnes, F Brown, G Almkvist, H Exton, H Exton, H Poincaré, HH Chan, HM Srivastava, I Bierenbaum, J Ablinger, J Ablinger, J Ablinger, J Ablinger, J Ablinger, J Ablinger, J Ablinger, J Ablinger, J Ablinger, J Ablinger, J Ablinger, J Blümlein, J Blümlein, J Blümlein, J Blümlein, J Blümlein, J Brödel, J Carter, J Gluza, J Gluza, J Henn, J Vollinga, J-P Serre, JA Lappo-Danilevsky, JJ Kovacic, JM Henn, JM Henn, KG Chetyrkin, KS Kölbig, KS Kölbig, L Adams, L Guo, L Lewin, L Lewin, L Pochhammer, LJ Slater, M Karr, MJG Veltman, N Nakanishi, O Gituliar, P Appell, P Nogueira, R de Kronig, RN Lee, S Abreu, S Becker, S Becker, S Becker, S Borowka, S Herfurtner, S Laporta, S Lefschetz, S Saran, S Saran, S Yu Sakovich, SA Larin, T Luthe, VA Smirnov, VE Zakharov, WN Bailey, Z Nagy   +98 more
core   +2 more sources

The two-mass contribution to the three-loop pure singlet operator matrix element [PDF]

, 2017
We present the two-mass QCD contributions to the pure singlet operator matrix element at three loop order in x-space. These terms are relevant for calculating the structure function $F_2(x,Q^2)$ at $O(\alpha_s^3)$ as well as for the matching relations in
Ablinger, J., Blümlein, J., De Freitas, A., Schneider, C., Schönwald, K.   +4 more
core   +3 more sources