6,446 research outputs found
Matter-induced hadronic processes
Two examples of ``exotic'' phenomena which become possible and important in
the presence of nuclear matter are discussed: omega -> pi pi decay, and
rho-omega mixing. Significance of these processes for the low-mass dilepton
production in relativistic heavy-ion collisions is indicated.Comment: 8 pages, uses aipproc.cls, talk presented by W. Florkowski at the
International Workshop on Hadron Physics "Effective Theories of Low Energy
QCD", Coimbra, Portugal, September 10-15, 199
Event-by-event fluctuations of transverse-momentum and multiparticle clusters in relativistic heavy-ion collisions
We analyze the event-by-event fluctuations of mean transverse-momentum
measured recently by the PHENIX and STAR Collaborations at RHIC. We argue that
the observed scaling of strength of dynamical fluctuations with the inverse
number of particles can be naturally explained by formation of multiparticle
clusters.Comment: talk presented by WF at the XXXVI International Symposium on
Multiparticle Dynamics, Sept. 2 - 8, 2006, Paraty, Brazi
Role of current quark mass dependent multi-quark interactions in low lying meson mass spectra
We call attention to a class of current-quark mass dependent multi-quark
interaction terms which break explicitly the chiral and
symmetries. They complete the set of effective quark interactions that
contribute at the same order in as the 't Hooft flavor determinant
interaction and the eight quark interactions in the phase of spontaneously
broken chiral symmetry. The classification scheme matches the counting
rules based on arguments set by the scale of spontaneous chiral symmetry
breaking. Together with the leading in four quark Nambu-Jona-Lasinio
Lagrangian and current quark mass matrix, the model is apt to account for the
correct empirical ordering and magnitude of the splitting of states in the low
lying mass spectra of spin zero mesons. The new terms turn out to be essential
for the ordering in the pseudoscalar sector and for the scalars.Comment: 6 pages, 1 figure, prepared for the proceedings of the workshop
"Excited QCD 2013", 03-09 February 2013 in Bjelasnica Mountain, Sarajevo,
Bosni
Sonoluminescence as Quantum Vaccum Radiation
We argue that the available experimental data is not compatible with models
of sonoluminescence which invoke dynamical properties of the interface without
regard to the compositional properties of the trapped gas inside the bubble.Comment: 2 pages,Revtex,No figures,Submitted to PRL(comments
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