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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…
Compositeness and several applications to exotic hadronic states with heavy quarks
J. A. Oller, Z. -H. Guo
Several methods for studying the nature of a resonance are applied to resonances recently discovered in the bottonomium and charmonium sectors. We employ the effective-range expans…
Unitarizing infinite-range forces: Graviton-graviton scattering, the graviball, and Coulomb scattering
J. A. Oller
We study graviton-graviton scattering in partial-wave amplitudes after unitarizing their Born terms. In order to apply -matrix techniques, based on unitarity and analyticity, we…
Methods on compositeness and related aspects
J. A. Oller
In many physical applications, bound states and/or resonances are observed, which raises the question whether these states are elementary or composite. Here we elaborate on several…
Axion-pion thermalization rate in unitarized NLO chiral perturbation theory
Luca Di Luzio, Jorge Martin Camalich, Guido Martinelli +2
We compute the axion-pion scattering , relevant for the axion thermalization rate in the early universe, within unitarized NLO chiral perturbation theory. The latter ext…
Axion-meson mixing in light of recent lattice - simulations and their two-photon couplings within chiral theory
Rui Gao, Zhi-Hui Guo, J. A. Oller +1
We study the mixing of the QCD/QCD-like axion and light-flavor mesons within the framework of chiral perturbation theory up to next-to-leading order in this wor…