207 citations · 1.5k across the 42 of their papers we have counts for
32 papers · 1 filter
The width of the omega meson in the nuclear medium
A. Ramos, L. Tolos, R. Molina +1
We evaluate the width of the meson in nuclear matter. We consider the free decay mode of the into three pions, which is dominated by decay, and replace the and …
Nuclear medium effects on the meson
L. Tolos, R. Molina, E. Oset +1
The meson in dense matter is analyzed by means of a unitary approach in coupled channels based on the local hidden gauge formalism. The self-energy and the co…
meson in nuclear matter
Laura Tolos, Raquel Molina, Eulogio Oset +1
The properties of the meson in dense matter are studied using a unitary approach in coupled channels within the framework of the local hidden gauge formalism. We obtain…
Strange meson production at high density and temperature
L. Tolos, D. Cabrera, R. Molina +2
The properties of strange mesons (, and ) in dense matter are studied using a unitary approach in coupled channels for meson-baryon scattering. The kaon-nucle…
Energy weighted sum rules for mesons in hot and dense matter
D. Cabrera, A. Polls, A. Ramos +1
We study energy weighted sum rules of the pion and kaon propagator in nuclear matter at finite temperature. The sum rules are obtained from matching the Dyson form of the meson pro…
K- absorption in nuclei by two and three nucleons
V. K. Magas, E. Oset, A. Ramos
It will be shown that the peaks in the (Lambda p) and (Lambda d) invariant mass distributions, observed in recent FINUDA experiments and claimed to be signals of deeply bound kaoni…
Strange mesons in nuclear matter at finite temperature
L. Tolos, D. Cabrera, A. Ramos
We study the properties of and mesons in nuclear matter at finite temperature from a chiral unitary approach in coupled channels which incorporates the - and p-wave…
Self-consistent coupled-channel approach to and in hot dense matter
Laura Tolos, Angels Ramos, Tetsuro Mizutani
A self-consistent coupled-channel approach is used to study the properties of and mesons in hot dense matter. The starting point is a broken SU(4) s-wave Tomozawa-Wein…
Microscopic calculations of spin polarized neutron matter at finite temperature
I. Bombaci, A. Polls, A. Ramos +2
The properties of spin polarized neutron matter are studied both at zero and finite temperature within the framework of the Brueckner--Hartree--Fock formalism, using the Argonne v1…
production in the reaction
T. Hyodo, A. Hosaka, E. Oset +2
We discuss the mechanisms that lead to production in the reaction. The problem has gained renewed interest after different works converge to the conclusio…
Antikaon production in A+A collisions at SIS energies within an off-shell G-matrix approach
W. Cassing, L. Tolos, E. L. Bratkovskaya +1
The production and propagation of antikaons -- described by dynamical spectral functions as evaluated from a coupled channel -matrix approach -- is studied…
Chiral dynamics of p-wave in K^- p and coupled states
D. Jido, E. Oset, A. Ramos
We perform an evaluation of the p-wave amplitudes of meson-baryon scattering in the strangeness S=-1 sector starting from the lowest order chiral Lagrangians and introducing explic…
Spin polarized neutron matte and magnetic susceptibility within the Brueckner-Hartree-Fock approximation
I. Vidaña, A. Polls, A. Ramos
The Brueckner--Hartree--Fock formalism is applied to study spin polarized neutron matter properties. Results of the total energy per particle as a function of the spin polarization…
Finite temperature effects on the antikaon optical potential
L. Tolos, A. Polls, A. Ramos
By solving the Bethe-Goldstone equation, we have obtained the optical potential from the effective interaction in nuclear matter at T=0. We have extended the m…
Novel Weak Decays in Doubly Strange Systems
A. Parreno, A. Ramos, C. Bennhold
The strangeness-changing () weak baryon-baryon interaction is studied through the nonmesonic weak decay of double- hypernuclei. Besides the usual nucleon-induced decay $…
Antikaons in nuclei and dense nuclear matter
A. Ramos, S. Hirenzaki, S. S. Kamalov +6
We present recent progress on the properties of antikaons in nuclei and dense nuclear matter as obtained from two {\bar K}N interaction models: one based on the lowest-order meson-…
Chiral unitary approach to the K^- deuteron scattering length
S. S. Kamalov, E. Oset, A. Ramos
Starting from a recent model where the Kbar N amplitudes are evaluated from the chiral Lagrangians using a coupled channel unitary method, we evaluate here the scattering length fo…
Hyperon-hyperon interactions and properties of neutron matter
I. Vidaña, A. Polls, A. Ramos +2
We present results from Brueckner-Hartree-Fock calculatons for beta stable neutron star matter with nucleonic and hyperonic degress degrees of freedom, employing the most recent pa…
The Longitudinal and Transverse responses in inclusive electron scattering within the RPA framework
E. Bauer, A. Polls, A. Ramos
The longitudinal and transverse nuclear responses to inclusive electron scattering reactions are analyzed within the Random Phase Approximation (RPA) framework. Several residual in…
Photoproduction of meson and baryon resonances in a chiral unitary approach
E. Oset, E. Marco, J. C. Nacher +4
By means of a coupled channel non-perturbative unitary approach, it is possible to extend the strong constrains of Chiral Perturbation Theory to higher energies. In particular, it…
Strange nuclear matter within Brueckner-Hartree-Fock Theory
I. Vidana, A. Polls, A. Ramos +2
We have developed a formalism for microscopic Brueckner-type calculations of dense nuclear matter that includes all types of baryon-baryon interactions and allows to treat any asym…
Chiral Unitary Approach To The N*N*pi, N*N*eta Couplings For The N*(1535) Resonance
J. C. Nacher, A. Parreno, E. Oset +3
Using a chiral unitary model in which the negative parity nucleon resonance is generated dynamically by means of the Bethe Salpeter equation with coupl…
Decay of Hypernuclei
A. Parreño, C. Bennhold, A. Ramos
We present a nonrelativistic transition potential for the weak strangeness-changing reaction . The potential is based on a one meson exchange model (OME), where, in addi…
Recent progress on the chiral unitary approach to meson meson and meson baryon interactions
E. Oset, J. A. Oller, J. R. Pelaez +11
We report on recent progress on the chiral unitary approach, analogous to the effective range expansion in Quantum Mechanics, which is shown to have a much larger convergence radiu…