926 citations · 10.4k across the 147 of their papers we have counts for
147 papers
Gravitational waves decay in vacuum
Diego Blas, José Antonio Oller
We show that gravitational waves (GW), treated as coherent graviton states, decay into photon pairs in vacuum. The process, even if suppressed by , is lifted by two effects co…
Pole properties of a resonance: When to subtract partial-decay widths to obtain the pole widths
J. A. Oller
When a resonance lies near the threshold of a heavier channel, an interesting feature can occur. The paradigmatic example employed here is the scalar isoscalar resonance…
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…