Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Feldmann, Th."'
We develop a systematic framework for exclusive rare B decays of the type B -> K(*)l+l- at large dilepton invariant mass q^2. It is based on an operator product expansion (OPE) for the required matrix elements of the nonleptonic weak Hamiltonian in t
Externí odkaz:
http://arxiv.org/abs/1101.5118
The gauge sector of the Standard Model (SM) exhibits a flavour symmetry which allows for independent unitary transformations of the fermion multiplets. In the SM the flavour symmetry is broken by the Yukawa couplings to the Higgs boson, and the resul
Externí odkaz:
http://arxiv.org/abs/0906.1523
Autor:
Feldmann, Th., Mannel, Th.
Publikováno v:
Phys.Rev.D78:036009,2008
Lepton-flavour symmetry in the Standard Model is broken by small masses for charged leptons and neutrinos. Introducing neutrino masses via dimension-5 operators associated to lepton-number violation at a very high scale, the corresponding coupling ma
Externí odkaz:
http://arxiv.org/abs/0806.0717
Autor:
Buchalla, G., Komatsubara, T. K., Muheim, F., Silvestrini, L., Artuso, M., Asner, D. M., Ball, P., Baracchini, E., Bell, G., Beneke, M., Berryhill, J., Bevan, A., Bigi, I. I., Blanke, M., Bobeth, Ch., Bona, M., Borzumati, F., Browder, T., Buanes, T., Buchmuller, O., Buras, A. J., Burdin, S., Cassel, D. G., Cavanaugh, R., Ciuchini, M., Colangelo, P., Crosetti, G., Dedes, A., De Fazio, F., Descotes-Genon, S., Dickens, J., Dolezal, Z., Durr, S., Egede, U., Eggel, C., Eigen, G., Fajfer, S., Feldmann, Th., Ferrandes, R., Gambino, P., Gershon, T., Gibson, V., Giorgi, M., Gligorov, V. V., Golob, B., Golutvin, A., Grossman, Y., Guadagnoli, D., Haisch, U., Hazumi, M., Heinemeyer, S., Hiller, G., Hitlin, D., Huber, T., Hurth, T., Iijima, T., Ishikawa, A., Isidori, G., Jager, S., Khodjamirian, A., Koppenburg, P., Lagouri, T., Langenegger, U., Lazzeroni, C., Lenz, A., Lubicz, V., Lucha, W., Mahlke, H., Melikhov, D., Mescia, F., Misiak, M., Nakao, M., Napolitano, J., Nikitin, N., Nierste, U., Oide, K., Okada, Y., Paradisi, P., Parodi, F., Patel, M., Petrov, A. A., Pham, T. N., Pierini, M., Playfer, S., Polesello, G., Policicchio, A., Poschenrieder, A., Raimondi, P., Recksiegel, S., Reznicek, P., Robert, A., Robertson, S., Rosner, J. L., Ruggiero, G., Sarti, A., Schneider, O., Schwab, F., Simula, S., Sivoklokov, S., Slavich, P., Smith, C., Smizanska, M., Soni, A., Speer, T., Spradlin, P., Spranger, M., Starodumov, A., Stech, B., Stocchi, A., Stone, S., Tarantino, C., Teubert, F., T'Jampens, S., Toms, K., Trabelsi, K., Trine, S., Uhlig, S., Vagnoni, V., van Hunen, J. J., Weiglein, G., Weiler, A., Wilkinson, G., Xie, Y., Yamauchi, M., Zhu, G., Zupan, J., Zwicky, R.
Publikováno v:
Eur.Phys.J.C57:309-492,2008
With the advent of the LHC, we will be able to probe New Physics (NP) up to energy scales almost one order of magnitude larger than it has been possible with present accelerator facilities. While direct detection of new particles will be the main ave
Externí odkaz:
http://arxiv.org/abs/0801.1833
Publikováno v:
Phys.Rev.D77:033006,2008
We discuss the phenomenology of strange-quark dynamics in the nucleon, based on experimental and theoretical results for electroweak form factors and for parton densities. In particular, we construct a model for the generalized parton distribution th
Externí odkaz:
http://arxiv.org/abs/0711.4304
Autor:
Feldmann, Th., Bell, G.
Publikováno v:
AIPConf.Proc.964:110-117,2007
We calculate light-cone distribution amplitudes for non-relativistic bound states, including radiative corrections from relativistic gluon exchange to first order in the strong coupling constant. Our results apply to hard exclusive reactions with non
Externí odkaz:
http://arxiv.org/abs/0711.4014
Publikováno v:
JHEP 0802:031,2008
We investigate sum rules for heavy-to-light transition form factors at large recoil derived from correlation functions with interpolating currents for light pseudoscalar or vector fields in soft-collinear effective theory (SCET). We consider both, fa
Externí odkaz:
http://arxiv.org/abs/0711.3999
Publikováno v:
JHEP 0710:039,2007
Many models for physics beyond the Standard Model predict lepton-flavour violating decays of charged leptons at a level which may become observable very soon. In the present paper we investigate the decays of a Tau into three charged leptons in a gen
Externí odkaz:
http://arxiv.org/abs/0707.0988
Autor:
Feldmann, Th., Mannel, Th.
Publikováno v:
JHEP 0702:067,2007
Starting from the effective-theory framework for Minimal Flavour Violation, we give a systematic definition of next-to-minimal (quark) flavour violation in terms of a set of spurion fields exhibiting a particular hierarchy with respect to a small (Wo
Externí odkaz:
http://arxiv.org/abs/hep-ph/0611095
Publikováno v:
JHEP0605:056,2006
We study radiative corrections to $\bar{B} \to X_c \ell \bar{\nu}_\ell$ decays assuming the power counting $m_c \sim \sqrt{\Lambda_QCD m_b}$ for the charm-quark mass. Concentrating on the shape-function region, we use effective field-theory methods t
Externí odkaz:
http://arxiv.org/abs/hep-ph/0512157