Biomedical subjects

A D Polosa

Publications and source records attributed to A D Polosa.

4 recordsLinked to original sources

PubMed2004

New look at scalar mesons.

Light scalar mesons are found to fit rather well a diquark-antidiquark description. The resulting nonet obeys mass formulas which respect, to a good extent, the Okubo-Zweig-Iizuka (OZI) rule. OZI allowed strong decays are reasonably reproduced by a single amplitude describing the switch of a qq pair, which transforms the state into two colorless pseudoscalar mesons. Predicted heavy states with one or more quarks replaced by charm or beauty are briefly described; they should give rise to narrow states with exotic quantum numbers.

Journal Article↗

PubMed2001

Magnetic order in the Ising model with parallel dynamics.

It is discussed how the equilibrium properties of the Ising model are described by an Hamiltonian with an antiferromagnetic low temperature behavior if only an heat bath dynamics, with the characteristics of a Probabilistic cellular automaton, is assumed to determine the temporal evolution of the system.

Journal Article↗

PubMed2001

B --> rhopi decays, resonant and nonresonant contributions.

We point out that a new contribution to B decays to three pions is relevant in explaining recent data from the CLEO and BABAR Collaborations, in particular, the results on quasi-two-body decays via a rho meson. We also discuss the relevance of these contributions to the measurement of CP violations.

Journal Article↗

PubMed1999

Multiscale analysis of blood pressure signals.

We describe the multiresolution wavelet analysis of blood pressure waves in vasovagal syncope-affected patients compared with those in healthy people, using Haar and Gaussian bases. A comparison between scale-dependent and scale-independent measures discriminating the two classes of subjects is made. What emerges is a sort of equivalence between these two methodological approaches, that is, both methods reach the same statistical significance of separation between the two classes.

Biophysical Phenomena↗