Novel approaches in hadron spectroscopy

M Albaladejo, Ł Bibrzycki, SM Dawid… - Progress in Particle and …, 2022 - Elsevier
The last two decades have witnessed the discovery of a myriad of new and unexpected
hadrons. The future holds more surprises for us, thanks to new-generation experiments …

Study of the doubly charmed tetraquark

Nature Communications, 2022 - nature.com
Quantum chromodynamics, the theory of the strong force, describes interactions of coloured
quarks and gluons and the formation of hadronic matter. Conventional hadronic matter …

Light baryon spectroscopy

A Thiel, F Afzal, Y Wunderlich - Progress in Particle and Nuclear Physics, 2022 - Elsevier
This review treats the advances in Light Baryon Spectroscopy of the last two decades, which
were mainly obtained by measuring meson-production reactions at photon facilities all over …

Coupled-channel approach to including three-body effects

ML Du, V Baru, XK Dong, A Filin, FK Guo, C Hanhart… - Physical Review D, 2022 - APS
A coupled-channel approach is applied to the charged tetraquark state T cc+ recently
discovered by the LHCb Collaboration. The parameters of the interaction are fixed by a fit to …

Three-body unitarity versus finite-volume spectrum from lattice QCD

M Mai, M Döring, C Culver, A Alexandru - Physical Review D, 2020 - APS
Strong three-body interactions above threshold govern the dynamics of many exotics and
conventional excited mesons and baryons. Three-body finite-volume energies calculated …

Observation of a new baryon state in the mass spectrum

R Aaij, C Abellán Beteta, T Ackernley, B Adeva… - Journal of High Energy …, 2020 - Springer
A bstract A new baryon state is observed in the\({\Lambda} _ {\mathrm {b}}^ 0 {\pi}^{+}{\pi}^{-
}\) mass spectrum with high significance using a data sample of pp collisions, collected with …

Numerical exploration of three relativistic particles in a finite volume including two-particle resonances and bound states

F Romero-López, SR Sharpe, TD Blanton… - Journal of High Energy …, 2019 - Springer
A bstract In this work, we use an extension of the quantization condition, given in ref.[1], to
numerically explore the finite-volume spectrum of three relativistic particles, in the case that …

Three-body interactions from the finite-volume QCD spectrum

R Brett, C Culver, M Mai, A Alexandru, M Döring… - Physical Review D, 2021 - APS
We perform a fit of the finite-volume QCD spectrum of three pions at maximal isospin to
constrain the three-body force. We use the unitarity-based relativistic three-particle …

Light-meson spectroscopy with COMPASS

B Ketzer, B Grube, D Ryabchikov - Progress in Particle and Nuclear …, 2020 - Elsevier
Despite decades of research, we still lack a detailed quantitative understanding of the way
quantum chromodynamics (QCD) generates the spectrum of hadrons. Precise experimental …

Three-body scattering and quantization conditions from -matrix unitarity

AW Jackura - Physical Review D, 2023 - APS
Two methodologies have been presented in the literature which connect relativistic three-
particle scattering amplitudes with lattice QCD spectra—the “relativistic effective field theory” …