Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Matthias Steinhauser"'
Autor:
Matthias Steinhauser, Martin Beneke
Publikováno v:
Nuclear and Particle Physics Proceedings. :378-413
Non-relativistic physics is often associated with atomic physics and low-energy phenomena of the strong interactions between nuclei and quarks. In this review we cover three topics in contemporary high-energy physics at or close to the TeV scale, whe
Autor:
Matthias Steinhauser, Y. Kiyo, Jan H. Piclum, Peter Marquard, Alexander A. Penin, Martin Beneke
Publikováno v:
Physical Review Letters. 115
We present the third-order QCD prediction for the production of top antitop quark pairs in electron-positron collisions close to the threshold in the dominant S-wave state. We observe a significant reduction of the theoretical uncertainty and discuss
Publikováno v:
Nuclear Physics B. 716:303-318
We compute the third-order corrections to the heavy quarkonium spectrum and production/annihilation rates due to the leading renormalization group running of the static potential. The previously known complete O ( m q α s 5 ) result for the heavy qu
Publikováno v:
Physical Review Letters. 112
We present the complete result for the O(α7me) one photon annihilation contribution to the hyperfine splitting of the ground state energy levels in positronium. Numerically it increases the prediction of quantum electrodynamics by 217±1 kHz.
Autor:
A. Maier, Matthias Steinhauser, Christian Sturm, Johann H. Kuhn, K.G. Chetyrkin, P. Maierhöfer, Peter Marquard
Using new four-loop results for the heavy quark vacuum polarization and new data for bottom quark production in electron-positron annihilation, an update on the determination of charm- and bottom-quark masses through sum rules has been performed. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2447c4152e352f610d960850bff2661
http://arxiv.org/abs/0907.2110
http://arxiv.org/abs/0907.2110
In this paper we investigate supersymmetric effects to the threshold production cross section of top quark pairs in electron positron annihilation. In particular, we consider the complete one-loop corrections from the strong and weak sector of the Mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05c2a7c8e9a7e2c2015b7144fafe1d3c
http://arxiv.org/abs/0907.1146
http://arxiv.org/abs/0907.1146
Publikováno v:
High Performance Computing in Science and Engineering '08 ISBN: 9783540883012
High Performance Computing in Science and Engineering
High Performance Computing in Science and Engineering
The main purpose of particle physics is the explanation of the fundamental mechanism for the interaction of the elementary particles. On the experimental side the investigations take mainly place at the big accelerators at CERN (Geneva) or FERMILAB (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d8890c9c0cc801f02c2ecbb7301c975
https://doi.org/10.1007/978-3-540-88303-6_3
https://doi.org/10.1007/978-3-540-88303-6_3
Autor:
Matthias Steinhauser, R. R. Horgan, E. Dalgic, K. Hornbostel, G. P. Lepage, Christine Davies, I. F. Allison, Craig McNeile, Jens H. Kuhn, R. M. Woloshyn, Junko Shigemitsu, Howard D. Trottier, E. Follana, Christian Sturm, K. G. Chetyrkin
We use lattice QCD simulations, with MILC gluon configurations and HISQ c-quark propagators, to make very precise determinations of moments of charm-quark pseudoscalar, vector and axial-vector correlators. These moments are combined with new four-loo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13bfad4be840b17f21b5506947016e44
http://arxiv.org/abs/0805.2999
http://arxiv.org/abs/0805.2999
Publikováno v:
Physical Review D. 76
Using recent CLEO III results for the cross section for $e^+e^- \to {\rm hadrons}$ at seven centre-of-mass energies between 6.964 and 10.538 GeV, we derive a value for the strong coupling constant $\alpha_s(M_Z^2)=0.110_{-0.012}^{-0.010}{}_{-0.011}^{
Autor:
Matthias Steinhauser
Publikováno v:
AIP Conference Proceedings.
We discuss new results obtained for the description of a system of two heavy quarks close to the production threshold. Special emphasis is put on the resummation of logarithms in the quark velocity. As physical applications we discuss the determinati