Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Kühn, J. H."'
The precise determination of the cross section for electron-positron annihilation into hadrons is one of the central tasks of ongoing experiments at low energy colliders. These measurements have to be complemented by Monte Carlo generators which simu
Externí odkaz:
http://arxiv.org/abs/1306.1985
Publikováno v:
Nucl.Phys.B 867 (2013) 182-202
In this paper we compute the four-loop corrections to the QED photon self-energy Pi(Q^2) in the two limits of q=0 and Q^2->infinity. These results are used to explicitly construct the conversion relations between the QED charge renormalized in on-she
Externí odkaz:
http://arxiv.org/abs/1207.2199
Publikováno v:
JHEP 1106:143,2011
We derive the high energy asymptotic of one- and two-loop corrections in the next-to-next-to-leading logarithmic approximation to the differential cross section of $W$-pair production at the LHC. For large invariant mass of the W-pair the (negative)
Externí odkaz:
http://arxiv.org/abs/1101.2563
Publikováno v:
Eur.Phys.J.C70:659-671,2010
Electroweak radiative corrections give rise to large negative, double-logarithmically enhanced corrections in the TeV region. These are partly compensated by real radiation and, moreover, affected by selecting isospin-noninvariant external states. We
Externí odkaz:
http://arxiv.org/abs/1004.4117
Autor:
Actis, S., Arbuzov, A., Balossini, G., Beltrame, P., Bignamini, C., Bonciani, R., Calame, C. M. Carloni, Cherepanov, V., Czakon, M., Czyz, H., Denig, A., Eidelman, S., Fedotovich, G. V., Ferroglia, A., Gluza, J., Grzelinska, A., Gunia, M., Hafner, A., Ignatov, F., Jadach, S., Jegerlehner, F., Kalinowski, A., Kluge, W., Korchin, A., Kuhn, J. H., Kuraev, E. A., Lukin, P., Mastrolia, P., Montagna, G., Muller, S. E., Nguyen, F., Nicrosini, O., Nomura, D., Pakhlova, G., Pancheri, G., Passera, M., Penin, A., Piccinini, F., Placzek, W., Przedzinski, T., Remiddi, E., Riemann, T., Rodrigo, G., Roig, P., Shekhovtsova, O., Shen, C. P., Sibidanov, A. L., Teubner, T., Trentadue, L., Venanzoni, G., van der Bij, J. J., Wang, P., Ward, B. F. L., Was, Z., Worek, M., Yuan, C. Z.
Publikováno v:
Eur.Phys.J.C66:585-686,2010
We present the achievements of the last years of the experimental and theoretical groups working on hadronic cross section measurements at the low energy e+e- colliders in Beijing, Frascati, Ithaca, Novosibirsk, Stanford and Tsukuba and on tau decays
Externí odkaz:
http://arxiv.org/abs/0912.0749
Publikováno v:
Phys.Rev.D82:013007,2010
One of the main challenges of the Tevatron at Fermilab and the Large Hadron Collider (LHC) at CERN is the determination of Standard Model (SM) parameters at the TeV scale. In this context various processes will be investigated which involve bottom-qu
Externí odkaz:
http://arxiv.org/abs/0909.0059
Autor:
Chetyrkin, K. G., Kuhn, J. H., Maier, A., Maierhöfer, P., Marquard, P., Steinhauser, M., Sturm, C.
Publikováno v:
Phys.Rev.D80:074010,2009
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:
http://arxiv.org/abs/0907.2110
Autor:
Allison, I., Dalgic, E., Davies, C. T. H., Follana, E., Horgan, R. R., Hornbostel, K., Lepage, G. P., McNeile, C., Shigemitsu, J., Trottier, H., Woloshyn, R. M., Chetyrkin, K. G., Kuhn, J. H., Steinhauser, M., Sturm, C.
Publikováno v:
Phys.Rev.D78:054513,2008
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:
http://arxiv.org/abs/0805.2999
Publikováno v:
Nucl.Phys.B795:277-290,2008
We derive the high energy asymptotic behavior of gauge boson production cross section in a spontaneously broken SU(2) gauge theory in the next-to-next-to-leading logarithmic approximation. On the basis of this result we obtain the logarithmically enh
Externí odkaz:
http://arxiv.org/abs/0709.4055
Publikováno v:
Nucl.Phys.B788:47-62,2008
The two-loop formfactor both for a U(1)xU(1) and a SU(2)xU(1) gauge theory with massive and massless gauge bosons respectively is evaluated at arbitrary momentum transfer q^2. The asymptotic behaviour for q^2->\infinity is compared to a recent calcul
Externí odkaz:
http://arxiv.org/abs/hep-ph/0703013