An updated review of the new hadron states

Chen, Hua-Xing; Chen, Wei; Liu, Xiang; Liu, Yan‐Rui; Zhu, Shi-Lin

doi:10.1088/1361-6633/aca3b6

Cited by 264 publications

(77 citation statements)

References 1,115 publications

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“…tetraquark or hadrocharmonium states, see Refs. [109][110][111][112][113][114][115][116][117] for review. A complete spectrum for hadronic molecules seems to be emergent and could be nicely organized by heavy quark spin and flavor symmetries [118].…”

Section: −12 +14mentioning

confidence: 99%

“…The parameters of resonances from low to high excitation are extracted with continuous improvement of accuracy. Herein we briefly outline the essentials of the framework, in particular the main feature of technique and reaction kinematics, but leave the theories and models of hadron structure into other comprehensive reviews [109][110][111][112][113][114][115][116][117]. .…”

Section: Outline Of the Frameworkmentioning

confidence: 99%

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Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom

Xu¹

2023

Preprint

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Accessing a full image of the inner content of hadrons represents a central endeavour of modern particle physics, with the main scientific motivation to investigate the strong interaction binding the visible matter. On the one hand, the structure of known exotic candidates is a fundamental open issue addressed widely by scientists. On the other hand, looking for new states of exotic nature is a central component for theoretical and experimental efforts from electron-positron machine and electron accelerator with fixed target to heavy ion and electron-ion colliders. In this article we present a succinct short overview of the attempt to search for exotic narrow N * and Z states containing light quarks only or also charm, and its connotation for bottom regions (the latter two are also known as P c (Z c ) and P b (Z b ) states, respectively in the literature). We address the effort of searching for exotic narrow N * and Z states in light quark sector. We focus on recent progress in searching for signal of P c and Z c states photoproduction and its implication into the P b and Z b photoproduction and their decay properties. We also discuss future perspectives for the field in electron-ion colliders, a good place to disentangle the nature of some of these states and investigate some other enlightening topics including QCD trace anomaly and quarkonium-nucleon scattering length.

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Section: −12 +14mentioning

confidence: 99%

Section: Outline Of the Frameworkmentioning

confidence: 99%

Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom

Xu¹

2023

Preprint

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“…For a few recent reviews of the relevant experimental discoveries and the corresponding theoretical studies, we refer to Refs. [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Exotic hadrons from an effective field theory perspective

Guo¹

2023

Proceedings of the 39th International Symposium on Lattice Field Theory — PoS(LATTICE2022)

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The last two decades witness the discovery of tens of hadronic structures beyond the expectations of the traditional quark model. They are candidates of exotic hadrons. Many of these structures are close to the thresholds of a pair of hadrons, and thus allow for a treatment using effective field theories at the hadronic level. In this talk, I will give an overview of the understanding of such resonances from an effective field theory pespective, covering positive-parity heavy meson, hidden-charm and double-charm near-threshold hadrons.

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“…It is becoming more evident that QCD hadrons containing one or more heavy charm or bottom quarks can permit more complicated structures than those predicted simply from the relativistic quark model. Such examples of exotic states in the charm sector are the experimental discoveries of various tetraquarks and pentaquarks [1][2][3] (see [4] for a recent review). Lattice QCD is in an ideal place to investigate the spectrum of QCD from first principles, and having well-behaved heavy-quark prescriptions are of significant importance.…”

Section: Introductionmentioning

confidence: 99%

Non-perturbative heavy quark action tuning using machine learning

Hudspith¹,

Mohler²

2023

Proceedings of the 39th International Symposium on Lattice Field Theory — PoS(LATTICE2022)

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We present a fully non-perturbative determination of a relativistic heavy quark action's parameters on the CLS 𝑛 𝑓 = 2 + 1 Wilson-clover ensembles using neural networks. We then further illustrate the applicability of such an approach for lattice NRQCD bottom quarks, and finally investigate some physics quantities under our tuning. In particular, we look at the excited spectrum of bottomonia, a popular 𝑢𝑑 b b tetraquark candidate, and the not-yet observed bottom-strange cousins of the exotic 𝐽 𝑃 = 0 + 𝐷 * 𝑠0 (2317) and 𝐽 𝑃 = 1 + 𝐷 𝑠1 (2460) mesons.

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An updated review of the new hadron states

Cited by 264 publications

References 1,115 publications

Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom

Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom

Exotic hadrons from an effective field theory perspective

Non-perturbative heavy quark action tuning using machine learning

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