Milestones

2023

Milestone 3 (Lattice):
Extension of finite-volume three-body formalism to scattering of particles with spin
Quartile: Q2, Status: Completed, Responsible: Stephen Sharpe
Papers: JHEP 07 (2023), 226
News: Extension of finite-volume three-body formalism to scattering of particles with spin

Milestone 1 (AmpAn):
Mass-independent partial-wave analysis. Determine the existence of ambiguities in mass independent PWA of two-pseudoscalar meson photoproduction
Quartile: Q3, Status: Completed, Responsible: Adam Szczepaniak
Papers: Phys. Rev. D 108 (2023), 076001
News: No ambiguities in the partial wave analysis for hybrids

Milestone 2 (AmpAn):
Formulate and apply mass-dependent amplitude analysis to describe $\Delta^{++}$ production and explain the momentum transfer behavior of the beam spin asymmetry
Quartile: Q3, Status: Partially completed, Responsible: Adam Szczepaniak
Papers: arXiv:2407.19577
News: Reconciling gauge invariance and Reggeization of pion exchange

Milestone 4 (Lattice):
First dispersive extractions of the $\sigma/f_0(500)$ from lattice QCD at various light-quark masses
Quartile: Q3, Status: Completed, Responsible: Arkaitz Rodas Bilbao
Papers: Phys. Rev. D 109 (2024), 034513; Phys. Rev. D 108 (2023), 034513
News: Dispersion relations and Lattice QCD pinpoint the $\sigma$ meson

Milestone 6 (Pheno):
Calculation of decays of $T_{cc}^+(3875)$ in XEFT at LO, and determining implications of the systematic treatment of the nearby coupled 2-body channel for lighter exotic hadrons
Quartile: Q3, Status: Partially completed, Responsible: Eric Braaten
Papers: Phys. Rev. D 109 (2024), 094051

Milestone 8 (Pheno):
Take advantage of the GlueX measurements on photoproduction of vector mesons to perform quantitative analysis of their implications for fundamental properties such as the proton mass radius
Quartile: Q4, Status: Completed, Responsible: Jinfeng Liao
Papers: arXiv:2405.07077; Phys. Rev. D 108 (2023), 054018
News: Revisiting $J/\psi$ photoproduction at threshold

2024

Milestone 13 (Lattice):
Extension of finite-volume three-body formalism to more general cases of multiple coupled systems
Quartile: Q2, Status: Completed, Responsible: Stephen Sharpe
Papers: JHEP 07 (2024), 083
News: Three particles with coupled channels

2025

Milestone 16 (AmpAn):
Develop unitary coupled-channel amplitudes compatible with Regge asymptotics for production of three-body final states
Quartile: Q2, Status: Partially completed, Responsible: Emilie Passemar
Papers: arXiv:2409.09172
News: Towards a unified description of hadron scattering at all energies

Milestone 17 (AmpAn):
Development of formalism to analytically continue three-body integral equations into the complex plane in order to search for resonance pole singularities
Quartile: Q4, Status: Completed, Responsible: Michael Döring
Papers: Phys. Rev. D 108 (2023), 034016

Milestone 23 (Pheno):
Identify and compute distinctive decay modes of the exotics to quasi-stable hadronic final states within the dynamical model previously developed
Quartile: Q4, Status: Completed, Responsible: Eric Swanson
Papers: Phys. Rev. D 109 (2024), 094015
News: A Constituent Model of Light Hybrid Meson Decays