926 citations · 10.4k across the 147 of their papers we have counts for
33 papers · 1 filter
Nuclear matter from the ladder resummation in terms of the experimental nucleon-nucleon scattering amplitudes
J. M. Alarcón, J. A. Oller
Infinite nuclear matter is studied by resuming the series of ladder diagrams based on the results developed by us in Ann. Phys. 437, 168741 (2022). The master formula for the energ…
Ladder resummation of spin 1/2 fermion many-body systems with arbitrary partial-wave content
J. M. Alarcón, J. A. Oller
We resum the ladder diagrams for the calculation of the energy density of a spin 1/2 fermion many-body system in terms of arbitrary vacuum two-body scattering amplitudes.…
Non-perturbative methods for NN singular interactions
D. R. Entem, J. A. Oller
Chiral Effective Field Theory (EFT) has been extensively used to study the interaction during the last three decades. In Effective Field Theories (EFTs) the renormalization…
An in-medium chiral power counting for nuclear matter and some applications
J. A. Oller
We review on a chiral power counting for in-medium chiral perturbation theory with nucleons and pions as explicit degrees of freedom coupled to external sources. It allows for a sy…
The N/D method with non-perturbative left-hand-cut discontinuity and the partial wave
D. R. Entem, J. A. Oller
In this letter we deduce an integral equation that allows to calculate the exact left-hand-cut discontinuity for an uncoupled -wave partial-wave amplitude in potential scatterin…
Nucleon-Nucleon scattering from dispersion relations: next-to-next-to-leading order study
J. A. Oller
We study nucleon-nucleon () scattering by applying the method in chiral perturbation theory up to next-to-next-to-leading (NNLO) order in the calculation of the imaginary…
New insights in \bar{K}N scattering and the Λ(1405)
J. A. Oller
We discuss in this talk aspects of \bar{K}N plus coupled channels dynamics with special emphasis on the Λ(1405) resonance and isovector resonances in the same energy region. We com…
Nucleon-Nucleon scattering from the dispersive N/D method: next-to-leading order study
Zhi-Hui Guo, J. A. Oller, G. Rios
We consider nucleon-nucleon () interactions from Chiral Effective Field Theory applying the method. The dynamical input is given by the discontinuity of the partial-…
Developments in Chiral effective Field Theory for Nuclear Matter
J. A. Oller
We review on a chiral power counting scheme for in-medium chiral perturbation theory with nucleons and pions as degrees of freedom \cite{ref}. It allows for a systematic expansion…
Nucleon-Nucleon Interactions from Dispersion Relations: Coupled Partial Waves
M. Albaladejo, J. A. Oller
We consider nucleon-nucleon interactions from chiral effective field theory applying the N/D method. The case of coupled partial waves is now treated, extending Ref. [1] where the…
Relativistic chiral representation of the πN scattering amplitude
J. M. Alarcón, J. Martín Camalich, J. A. Oller +1
We have analyzed pion-nucleon scattering using the manifestly relativistic covariant frameworks of Infrared Regularization (IR) and Extended-On-Mass-Shell (EOMS) up to O(q^3) in th…
Nucleon-nucleon interactions from dispersion relations: Elastic partial waves
M. Albaladejo, J. A. Oller
We consider nucleon-nucleon (NN) interactions from chiral effective field theory. In this work we restrict ourselves to the elastic NN scattering. We apply the N/D method to calcul…
πN scattering in relativistic baryon chiral perturbation theory revisited
J. M. Alarcon, J. Martin Camalich, J. A. Oller +1
We have analyzed pion-nucleon scattering using the manifestly relativistic covariant framework of Infrared Regularization up to {\cal O}(q^3) in the chiral expansion, where q is a…
Chiral effective field theory for nuclear matter
A. Lacour, U. -G. Meissner, J. A. Oller
We report on the recent developments of a new effective field theory for nuclear matter [1,2,3]. We present first the nuclear matter chiral power counting that takes into account b…
The chiral quark condensate and pion decay constant in nuclear matter at next-to-leading order
A. Lacour, J. A. Oller, U. -G. Meißner
Making use of the recently developed chiral power counting for the physics of nuclear matter [1,2], we evaluate the in-medium chiral quark condensate up to next-to-leading order fo…
Non-perturbative methods for a chiral effective field theory of finite density nuclear systems
A. Lacour, J. A. Oller, U. -G. Meißner
Recently we have developed a novel chiral power counting scheme for an effective field theory of nuclear matter with nucleons and pions as degrees of freedom [1]. It allows for a s…
Chiral Effective Field Theory for Nuclear Matter with long- and short-range Multi-Nucleon Interactions
J. A. Oller, A. Lacour, U. -G. Meißner
We derive a novel chiral power counting scheme for in-medium chiral perturbation theory with explicit nucleonic and pionic degrees of freedom coupled to external sources. It allows…
Chiral Unitary Dynamics of Hadrons and Hadrons in a Nuclear Medium
E. Oset, L. S. Geng, D. Gamermann +7
In this talk I summarize recent findings around the description of axial vector mesons as dynamically generated states from the interaction of pseudoscalar mesons and vector mesons…
Recent Developments in Chiral Unitary Dynamics of Resonances
E. Oset, L. S. Geng, D. Gamermann +6
In this talk I summarize recent findings made on the description of axial vector mesons as dynamically generated states from the interaction of peseudoscalar mesons and vector meso…
Dynamical baryon resonances from chiral unitarity
A. Ramos, C. Bennhold, A. Hosaka +6
We report on the latests developments in the field of baryonic resonances generated from the meson-baryon interaction in coupled channels using a chiral unitary approach. The colle…
Chiral dynamics of the two Lambda(1405) states
D. Jido, J. A. Oller, E. Oset +2
The Lambda(1405) resonance is studied by a chiral unitary approach, in which the resonance is dynamically generated in coupled-channel meson-baryon scattering. Investigating the an…
Dynamical Generation of Hyperon Resonances
A. Ramos, E. Oset, C. Bennhold +2
In this talk we report on how, using a chiral unitary approach for the meson--baryon interactions, two octets of baryon states and a singlet are generated dynamically,…
Chiral Dynamics of the Two Λ(1405) States
D. Jido, J. A. Oller, E. Oset +2
Using a chiral unitary approach for the meson--baryon interactions, we show that two octets of J^π=1/2^- baryon states, which are degenerate in the limit of exact SU(3) symmetry, a…
Nucleon-Nucleon Interactions from Effective Field Theory
Jose A. Oller
We have established a new convergent scheme to treat analytically nucleon-nucleon interactions from a chiral effective field theory. The Kaplan-Savage-Wise (KSW) amplitudes are res…