CERN Accelerating science

Preprint
Report number	arXiv:2207.14594
Title	Summary of Topical Group on Hadron Spectroscopy (RF07) Rare Processes and Precision Frontier of Snowmass 2021
Author(s)	Lebed, R.F. (ed.) (Arizona State U.) ; Skwarnicki, T. (ed.) (Syracuse U.) ; An, L. (CERN) ; Dobbs, S. (Florida State U.) ; Fulsom, B. (PNL, Richland) ; Guo, F.-K. (Nanjing U. ; Beijing, GUCAS) ; Karliner, M. (Tel Aviv U.) ; Mitchell, R.E. (Indiana U.) ; Pilloni, A. (INFN, Messina ; INFN, Catania) ; Pompili, A. (Bari U. ; INFN, Bari) ; Prelovsek, S. (Ljubljana U. ; Stefan Inst., Ljubljana) ; Santopinto, E. (INFN, Genoa) ; Stevens, J. (William-Mary Coll.) ; Szczepaniak, A. (Indiana U., CEEM ; Indiana U. ; Jefferson Lab)
Imprint	2022-07-29
Note	Submitted to the Proceedings of the US Community Study on the Future of Particle Physics (Snowmass 2021). Editors: R. F. Lebed, T. Skwarnicki
Presented at	2021 Snowmass Summer Study, Seattle, WA, United States, 11 - 20 July 2021, pp.
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Abstract	Hadron spectroscopy, the driving force of high-energy physics in its early decades, has experienced a renaissance in interest over the past 20 years due to the discovery of scores of new, potentially "exotic states" (tetraquarks, pentaquarks, hybrid mesons, glueballs), as well as the observation of many new "conventional" hadrons. The new discoveries expose our lack of understanding about hadronic states, beyond just a few low excitations of the simplest quark configurations. Even so, no single theoretical interpretation (such as hadron molecules, threshold effects, diquark compounds, or others) as yet successfully accommodates all of the new multiquark particles, while a great deal of work remains to extract signals of hybrids and glueballs from reaction-amplitude data. This document summarizes the current state of the field from both experimental and theoretical perspectives. On the experimental side, this report summarizes the current, planned, and proposed activities of LHCb and other LHC experiments, Belle II, BESIII, and GlueX, as well as the approved Electron-Ion Collider, the proposed Super Tau-Charm factory, and other future experiments. The theoretical portion provides a brief overview of multiple phenomenological approaches studied to date, progress in rigorous studies of reaction amplitudes, and advances in lattice-QCD simulations.
Other source	Inspire
Copyright/License	preprint: (License: CC BY 4.0)