Istituto Nazionale di Fisica Nucleare, Sezione di Napoli

output

19922026

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 1996 · hep-phShow all

12 papers · 2 filters

hep-ph1996★ 26 cited

The B -> X_s gamma gamma rare decay

Laura Reina, Giulia Ricciardi, Amarjit Soni

The rare decay B -> X_s gamma gamma is studied in the Standard Model (SM) and in two different versions (Model I and Model II) of the Two Higgs Doublet Model (2HDM). In the SM the…

hep-ph1996★ 80 cited

CP violation in kaon decays

G. D'Ambrosio, G. Isidori

We review the Standard Model predictions of CP violation in kaon decays. We present an elementary introduction to Chiral Perturbation Theory, four--quark effective hamiltonians and…

hep-ph1996★ 64 cited

Rare B \to K^{(*)} ν\barνDecays at B Factories

P. Colangelo, F. De Fazio, P. Santorelli +1

We compute the branching fraction of the decays $B \to K ν ν ˉ$ and $B \to K^{*} ν ν ˉ$ in the Standard Model. We also comment on the experimental difficulties and procedures to de…

hep-ph1996★ 61 cited

Vector meson exchange contributions to K --> pi gamma gamma and K(L) -> gamma lepton+ lepton-

Giancarlo D'Ambrosio, Jorge Portoles

We have studied in the framework of Chiral Perturbation Theory (ChPT) the O(p^6) Vector Meson contributions to K -> pi gamma gamma and K(L) -> gamma gamma^*. We construct the most…

hep-ph1996★ 68 cited

Comment on ``Confirmation of the Sigma Meson''

Masayasu Harada, Francesco Sannino, Joseph Schechter

We comment on the recent paper by N.A. Tornqvist and M. Roos published in Phys. Rev. Lett. 76, 1575 (1996).

hep-ph1996★ 3 cited

Standard vs. Generalized Chiral Perturbation Theory : the Chell-Olsson test

M. R. Pennington, J. Portoles

A way of testing the $π π$ predictions of Chiral Perturbation Theory against experimental data is to use dispersion relations to continue experimental information into the subthresh…

hep-ph1996★ 4 cited

On the indistinguishibility of Majorana- from Dirac-neutrino propagation in a stellar medium

S. Esposito

We study, in the framework of the Standard Model, the propagation of (pure) Majorana neutrinos in a typical stellar medium and show that Majorana neutrino matter oscillations are c…

hep-ph1996★ 5 cited

Supernova Neutrino Energy Spectra and the MSW Effect

F. Buccella, S. Esposito, C. Gualdi +1

The distortions in the thermal energy spectra for neutrinos produced in a supernova when a resonant oscillation, MSW effect, occurs are determined. In order to show this effect for…

hep-ph1996★ 4 cited

Unitarity and vector meson contributions to K^+ -> pi^+ gamma gamma

G. D'Ambrosio, J. Portoles

We compute the one-loop unitarity corrections O(p^6) from K^+ -> pi^+ pi^+ pi^- to K^+ -> pi^+ gamma gamma and we find they are relevant, increasing the leading order prediction fo…

hep-ph1996★ 6 cited

Quantum Statistical Parton Distributions and the Spin Crisis

F. Buccella, G. Miele, N. Tancredi

Quantum statistical distributions for the partons provide a fair description of deep inelastic scattering data at $Q^{2} = 3$ and $10 (G e V / c)^{2}$ . The study of the polarized structure…

hep-ph1996★ 10 cited

A Geometric Picture For Fermion Masses

Salvatore Esposito, Pietro Santorelli

We describe a geometric picture for the pattern of fermion masses of the three generations which is invariant with respect to the renormalization group below the electroweak scale.…

hep-ph1996★ 17 cited

Radiative Four--Meson Amplitudes in Chiral Perturbation Theory

G. D'Ambrosio, G. Ecker, G. Isidori +1

We present a general discussion of radiative four--meson processes to $O (p^{4})$ in chiral perturbation theory. We propose a definition of ``generalized bremsstrahlung'' that takes f…