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87 papers · 1 filter
Exclusive radiative and electroweak b->d and b->s penguin decays at NLO
M. Beneke, Th. Feldmann, D. Seidel
We provide Standard Model expectations for the rare radiative decays B->K^* gamma, B->rho gamma and B-> omega gamma, and the electroweak penguin decays B->K^* l^+ l^- and B->rho l^…
Two-Loop QCD Corrections to the Heavy Quark Form Factors: Axial Vector Contributions
W. Bernreuther, R. Bonciani, T. Gehrmann +4
We consider the Z Q Qbar vertex to second order in the QCD coupling for an on-shell massive quark-antiquark pair and for arbitrary momentum transfer of the Z boson. We present clos…
Time-resolved broadband analysis of slow-light propagation and superluminal transmission of electromagnetic waves in three-dimensional photonic crystals
J. Gomez Rivas, A. Farre Benet, J. Niehusmann +2
A time-resolved analysis of the amplitude and phase of THz pulses propagating through three-dimensional photonic crystals is presented. Single-cycle pulses of THz radiation allow m…
CP noninvariance and an effective cosmological constant: the energy density in a pseudoscalar field which arises from a cosmological, spontaneously-broken chiral symmetry
Saul Barshay, Georg Kreyerhoff
We present and discuss the properties and the main results of a cosmological model with a spontaneously-broken chiral symmetry. The model contains and relates dynamically, two spin…
Heavy Quarkonium Physics
N. Brambilla, M. Krämer, R. Mussa +82
This report is the result of the collaboration and research effort of the Quarkonium Working Group over the last three years. It provides a comprehensive overview of the state of t…
Orbital currents and charge density waves in a generalized Hubbard ladder
J. O. Fjaerestad, J. B. Marston, U. Schollwoeck
We study a generalized Hubbard model on the two-leg ladder at zero temperature, focusing on a parameter region with staggered flux (SF)/d-density wave (DDW) order. To guide our num…