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Threshold effects in hadron spectrum: a new spectroscopy?
Pablo G. Ortega, Jorge Segovia, David R. Entem +1
The exploration of energies above the open-flavor threshold in the meson spectra has led to the appearance of unexpected states difficult to accommodate in the naive picture of a b…
Counting states and the Hadron Resonance Gas: Does X(3872) count?
Pablo G. Ortega, David R. Entem, Francisco Fernandez +1
We analyze how the renowned X(3872), a weakly bound state right below the threshold, should effectively be included in a hadronic representation of the QCD partition f…
Charmonium resonances in the 3.9 GeV/ energy region and the puzzle
Pablo G. Ortega, Jorge Segovia, David R. Entem +1
An interesting controversy has emerged challenging the widely accepted nature of the and the resonances, which had initially been assigned to the a…
High-quality two-nucleon potentials up to fifth order of the chiral expansion
D. R. Entem, R. Machleidt, Y. Nosyk
We present NN potentials through five orders of chiral effective field theory ranging from leading order (LO) to next-to-next-to-next-to-next-to-leading order (N4LO). The construct…