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11 papers · 1 filter
Measurement of the Bs Meson Lifetime
The CDF Collaboration
The lifetime of the meson is measured using the semileptonic decay . The data sample consists of 19.3 pb of collisions at $\sqrt{s…
Total Cross Sections for Heavy Flavour Production at HERA
S. Frixione, M. L. Mangano, P. Nason +1
We compute total cross sections for charm and bottom photoproduction at HERA energies, and discuss the relevant theoretical uncertainties. In particular we discuss the problems ari…
R-Matrix Formulation of the Quantum Inhomogeneous Groups Iso_qr(N) and Isp_qr(N)
Paolo Aschieri, Leonardo Castellani
The quantum commutations and the orthogonal (symplectic) conditions for the inhomogeneous multiparametric -groups of the type are found in terms of the $…
Spectral stochastic processes arising in quantum mechanical models with a non-L2 ground state
J. Loffelholz, G. Morchio, F. Strocchi
A functional integral representation is given for a large class of quantum mechanical models with a non--L2 ground state. As a prototype the particle in a periodic potential is dis…
Acceleration Schemes for Ab-Initio Molecular Dynamics and Electronic Structure Calculations
Francesco Tassone, Francesco Mauri, Roberto Car
We study the convergence and the stability of fictitious dynamical methods for electrons. First, we show that a particular damped second-order dynamics has a much faster rate of co…
Inhomogeneous quantum groups IGL_{q,r}(N): Universal enveloping algebra and differential calculus
P. Aschieri, L. Castellani
A review of the multiparametric linear quantum group GL_qr(N), its real forms, its dual algebra U(gl_qr(N)) and its bicovariant differential calculus is given in the first part of…