The role of hidden-charm pentaquark resonance <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msubsup><mml:mrow><mml:mi>P</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup><mml:mo stretchy="false">(</mml:mo><mml:mn>4450</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> in J/ψ photoproduction on nuclei near threshold

Paryev, É. Ya.; Kiselev, Yu.T.

doi:10.1016/j.nuclphysa.2018.08.009

Cited by 19 publications

(3 citation statements)

References 36 publications

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“…Here the detection efficiencies in the third column are estimated from the simulated distribution of final-state particles. The production rates on light nuclei are supposed to be larger [241,248], which however will have lower luminosity. The distributions of the invariant mass spectra, the transverse momenta, the pseudorapidities, and the rapidities of the P b /P c states are presented in Fig.…”

Section: Cross Section Estimates and Simulationsmentioning

confidence: 99%

Electron-ion collider in China

et al. 2021

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Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons as well as nuclei. As a future high energy nuclear physics project, an Electron-ion collider in China (EicC) has been proposed. It will be constructed based on an upgraded heavy-ion accelerator, High Intensity heavy-ion Accelerator Facility (HIAF) which is currently under construction, together with a new electron ring. The proposed collider will provide highly polarized electrons (with a polarization of ∼80%) and protons (with a polarization of ∼70%) with variable center of mass energies from 15 to 20 GeV and the luminosity of (2–3) × 1033 cm−2 · s−1. Polarized deuterons and Helium-3, as well as unpolarized ion beams from Carbon to Uranium, will be also available at the EicC.The main foci of the EicC will be precision measurements of the structure of the nucleon in the sea quark region, including 3D tomography of nucleon; the partonic structure of nuclei and the parton interaction with the nuclear environment; the exotic states, especially those with heavy flavor quark contents. In addition, issues fundamental to understanding the origin of mass could be addressed by measurements of heavy quarkonia near-threshold production at the EicC. In order to achieve the above-mentioned physics goals, a hermetical detector system will be constructed with cutting-edge technologies.This document is the result of collective contributions and valuable inputs from experts across the globe. The EicC physics program complements the ongoing scientific programs at the Jefferson Laboratory and the future EIC project in the United States. The success of this project will also advance both nuclear and particle physics as well as accelerator and detector technology in China.

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Section: Cross Section Estimates and Simulationsmentioning

confidence: 99%

Electron-ion collider in China

et al. 2021

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“…The use of light ion beam as a substitute for the proton beam would magnify the coherent production of states. But incoherence from alteration of nuclear states may so large that the peak signal is lowered in cross sections [272][273][274][275]. Also inclusive processes would be enhanced by several times compared to the exclusive ones in lepton-proton collisions [246,247].…”

Section: Exotic Candidates In Beauty Sectormentioning

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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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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“…Many works have estimated the cross sections for the exclusive photoproduction of the hidden-charm pentaquark states [20][21][22][23][24][25][26][27][28][29][30][31][32] and hidden-charm tetraquark states [33][34][35][36][37][38] with the vector-meson dominance model, which assumes that the photon emitted from the electron converts into a 𝐽/𝜓 which then interacts with the proton to produce the hidden-charm states. Yet, since the production of a heavy quarkonium, such as the 𝐽/𝜓, in high-energy reactions requires the heavy quark and anti-quark pair to be confined in a small phase space, its production rate is much lower than that of a pair of open-charm hadrons.…”

Section: Introductionmentioning

confidence: 99%

Semi-inclusive electroproduction of hidden-charm and double-charm hadronic molecules

Shi¹,

Guo²,

Liu³

2022

Preprint

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The semi-inclusive electroproduction of exotic hadrons, including the 𝑇 𝑐𝑐 states, 𝑃 𝑐𝑠 states, and hidden-charm baryon-antibaryon states, is explored under the assumption that they are 𝑆-wave hadronic molecules of a pair of charmed hadrons. We employ the Monte Carlo event generator Pythia to produce the hadron pairs and then bind them together to form hadronic molecules. With the use of such production mechanism, the semi-inclusive electroproduction rates are estimated at the order-of-magnitude level. Our results indicate that a larger number of 𝑃 𝑐𝑠 states and Λ 𝑐 Λ𝑐 molecules can be produced at the proposed electron-ion colliders in China and in the US, EicC and US-EIC, respectively. The results also suggest that the 𝑇 𝑐𝑐 states and other hidden-charm baryon-antibaryon states can be searched for at US-EIC. Besides, the potential 24 GeV upgrade of CEBAF at Jefferson Lab can play an important role in the search of the hidden-charm tetraquark and pentaquark states due to its high luminosity.

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The role of hidden-charm pentaquark resonance Pc+(4450) in J/ψ photoproduction on nuclei near threshold

Cited by 19 publications

References 36 publications

Electron-ion collider in China

Electron-ion collider in China

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

Semi-inclusive electroproduction of hidden-charm and double-charm hadronic molecules

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