Note on Scalar Mesons

  title={Note on Scalar Mesons},
  author={Claude Amsler and Thomas Gutsche and Stefan Spanier and Nils A. Tornqvist},
  journal={Physics Letters B},

The experimental status of glueballs

Study of light scalar mesons from heavy quark decays

model-independent way to distinguish the descriptions for light scalar mesons . It also applies to the B− → Sl−ν and B0 → J/ψ(ηc)S decays. The SU(3) symmetry breaking effect is found to be under

Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners

We discuss selected and important features of hadronic molecules as one of promising forms of exotic hadrons near thresholds. Using examples of $D \bar D^*$ systems such as $X(3872)$ and $Z_c$,

Dipole portal to heavy neutral leptons

We consider generic neutrino dipole portals between left-handed neutrinos, photons, and right-handed heavy neutral leptons (HNL) with Dirac masses. The dominance of this portal significantly alters

Investigation of Binding Energy and Potential in Mesons

Truly by looking through the analytical model of constituent quarks and further the importance of the effects of relativity on quark dynamics in studying the interior structure of mesons, in this

Minimal supersymmetric inverse seesaw: neutrino masses, lepton flavour violation and LHC phenomenology

We study neutrino masses in the framework of the supersymmetric inverse seesaw model. Different from the non-supersymmetric version a minimal realization with just one pair of singlets is sufficient

Light scalar mesons in photon–photon collisions

Discovered more than forty years ago and from the very start a stumbling block for the naive quark–antiquark model, light scalar mesons are virtually universally believed to be nontrivial in nature

Precision measurement of the neutral pion lifetime

This work precisely measured the decay width Γ of the neutral pion π0 into two photons (γγ), leading to its unusually short lifetime, and confirmed the prediction based on the chiral anomaly in quantum chromodynamics.

Heavy quarkonium: progress, puzzles, and opportunities

A golden age for heavy-quarkonium physics dawned a decade ago, initiated by the confluence of exciting advances in quantum chromodynamics (QCD) and an explosion of related experimental activity. The