• Corpus ID: 253761203

Cornering Large-$N_c$ QCD with Positivity Bounds

  title={Cornering Large-\$N\_c\$ QCD with Positivity Bounds},
  author={Clara Fernandez and Alex Pomarol and Francesco Riva and Francesco Sciotti},
The simple analytic structure of meson scattering amplitudes in the large- N c limit, combined with positivity of the spectral density, provides precise predictions on low-energy observables. Building upon previous studies, we explore the allowed regions of chiral Lagrangian parameters and meson couplings to pions. We reveal a structure of kinks at all orders in the chiral expansion and develop analytical tools to show that kinks always correspond to amplitudes with a single light pole. We… 

Figures from this paper

Bell inequalities in 2-2 scattering

For 2-2 scattering of photons, gravitons, fermions and pions, we consider entanglement in isospin and helicity. While the photon, graviton and fermion examples involve qubits, pions are qutrits. We

Cutting the Coon Amplitude

The Coon amplitude is a $q$-deformed generalization of the Veneziano amplitude exhibiting a semi-infinite sequence of poles that converge on an accumulation point, from which a branch cut emerges. A



I and J

Currents and mesons

"Current and Mesons" is the most recent publication in the "Chicago Lectures in Physics" series. The book presents Professor Sakurai's introduction to a new field of elementary particle physics which

and P

    Journal of Functional Analysis 179

    • 214
    • 2001

    Particle Data Group)

    • PTEP 2022,
    • 2022