17 papers
A Constituent Quark-Meson Model for Heavy-Meson Processes
A. Deandrea, N. Di Bartolomeo, R. Gatto +2
We describe the effective heavy meson lagrangian for S- and P-wave heavy-light mesons in terms of a model based on meson-quark interactions, where mesonic transition amplitudes are…
Four-Fermion Effective Interactions and Recent Data at HERA
Nicola Di Bartolomeo, Marco Fabbrichesi
We discuss the possibility of explaining the excess in the cross section at high-Q^2 recently found at HERA in terms of four-fermion effective interactions. To avoid the constraint…
Non Leptonic Heavy Hadron Decays and Local Duality
A. Deandrea, N. Di Bartolomeo, R. Gatto +1
We discuss local duality for weak non leptonic B and Lambda_b decays in the m_b -> infinity limit under the hypothesis of factorization and in the Shifman-Voloshin limit. We show t…
The fate of the leptophobic Z'
M. L. Mangano, G. Altarelli, N. Di Bartolomeo +2
We review the main features of the leptophobic-Z' phenomenology, commenting on the prospects of these models after the recent experimental results on R_c, R_b and after the recent…
Phenomenology of Heavy Meson Chiral Lagrangians
R. Casalbuoni, A. Deandrea, N. Di Bartolomeo +3
The approximate symmetries of Quantum ChromoDynamics in the infinite heavy quark () mass limit () and in the chiral limit for the light quarks ($m_q \to 0,\;…
Rb, Rc and Jet Distributions at the Tevatron in a Model with an extra vector boson
G. Altarelli, N. Di Bartolomeo, F. Feruglio +2
We show that the reported anomalies in and can be interpreted as the effect of a heavy vector boson \zprime\ universally coupled to - and -type quarks separately…