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Study on open charm hadron production and angular correlation in high-energy nuclear collisions

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Nuclear Science and Techniques 2021年第1期32卷 10-16页

作者： Hai Wang jin-hui chen Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Fudan UniversityShanghai 200433China

We study the production and angular correlationof charm hadrons in hot and dense matter produced in high-energy nuclear-nuclear collisions within a multiphasetransport model(AMPT).By triggering additional charm-anticharm quark pair production in the AMPT,the modeldescribes the D^0 nuclear modification factor in the low andintermediate pr regions in Au+Au collisions at√VSNN=200 GeV reasonably *** exploration of the D^0 pair azimuthal angular correlation for different centralitiesshows clear evolution from low-multiplicity to high-mul-tiplicity events,which is associated with the number ofcharm quark interactions with medium partons duringAMPT transport.

关键词： Heavy-ion collision Heavy flavor Nuclear modification factor Two-particle correlations

Anisotropy flows in Pb-Pb collisions at LHC energies from parton scatterings with heavy quark trigger

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Nuclear Science and Techniques 2022年第2期33卷 14-20页

作者： Hai Wang jin-hui chen Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China

By implementing an additional heavy quark-antiquark pair production trigger in a multiphase transport(AMPT)model,we study the effect on anisotropy flows of identified particles with a focus on charged particles and quarkonium(J/ΨandΥ).A systematic increase in the collision rate for active partons in the AMPT model with such an implementation has been *** leads to a slight increase of identified particles anisotropy flows as a function of transverse momentum(pT)and rapidity,and gives a better description of the experimental data of elliptic flow toward larger *** approach provides an efficient way to study the heavy quark dynamics in the AMPT model at LHC energies.

关键词： Heavy-ion collision Quark-gluon plasma Quarkonium Collective flow

Gamma-,neutron-,and muon-induced environmental background simulations for 100Mo-based bolometric double-beta decay experiment at jinping Underground Laboratory

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Nuclear Science and Techniques 2023年第9期34卷 50-57页

作者： Wei chen Long Ma jin-hui chen Huan-Zhong Huang Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China University of California Los AngelesCA 90095USA

The sensitivity of an experiment to detect the Majorana neutrino mass via neutrinoless double-beta decay(0νββ) strongly depends on the rate of background events that can mimic this decay. One major source of this background is the radioactive emissions from the laboratory environment. In our study, we focused on assessing the background contributions from environmental gamma rays, neutrons, and underground muons to the jinping bolometric demonstration experiment. This experiment uses an array of lithium molybdate crystal bolometers to probe the potential 0νββ decay of the100Mo isotope at the China jinping Underground Laboratory. We also evaluated the shielding effectiveness of the experimental setup through an attenuation study. Our simulations indicate that the combined background from environmental gamma rays, neutrons, and muons in the relevant100Mo 0νββ Q-value region can be reduced to approximately 0.003 cts/kg/keV/yr.

关键词： Neutrinoless double-beta decay Geant4 CUPID

A brief review of antimatter production

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Frontiers of physics 2012年第6期7卷 637-646页

作者： Yu-Gang Ma jin-hui chen Liang Xue Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100080China

In this article, we present a brief review of the discoveries of kinds of antimatter particles, including positron （^-e）, antiproton （^-p）, antideuteron （^-d） and antihelium-3 （3^-He）. Special emphasis is put on the discovery of the antihypertriton（∧^3^-H） and antihelium-4 nucleus （4^-He, or ^-α） which were reported by the RHIC-STAR experiment very recently. In addition, brief discussions about the effort to search for antinuclei in cosmic rays and study of the longtime confinement of the simplest antimatter atom, antihydrogen are also given. Moreover, the production mechanism of anti-light nuclei is introduced.

关键词： antimatter,^-e,^-p,^-d 3^-H ∧^3^-H 3^-He 4^-He

Production of light nuclei and hypernuclei at High Intensity Accelerator Facility energy region

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Nuclear Science and Techniques 2017年第4期28卷 84-90页

作者： Peng Liu jin-hui chen Yu-Gang Ma Song Zhang Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049 China

Heavy-ion collisions are powerful tools for studying hypernuclear *** develop a dynamical coalescence model coupled with an ART model(version1.0) to study the production rates of light nuclear clusters and hypernuclei in heavy-ion reactions,for instance,the deuteron(d),triton(t),helium(~3He),and hypertriton(_A^3H)in minimum bias(0-80%centrality)~6Li+^(12)C reactions at beam energy of 3.5A *** penalty factor for light clusters is extracted from the yields,and the distributions of 0 angle of particles,which provide direct suggesetions about the location of particle detectors in the near future facility-High Intensity heavy-ion Accelerator Facility(HIAF) are *** calculation demonstrates that HIAF is suitable for studying hypernuclear physics.

关键词： Heavy-ion accelerator facility Hyperon Hypernuclei Coalescence Light nuclei

Silica optical fiber integrated with two-dimensional materials:towards opto-electro-mechanical technology

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Light(Science & Applications) 2021年第5期10卷 767-784页

作者： jin-hui chen Yi-feng Xiong Fei Xu Yan-qing Lu Institute of Electromagnetics and Acoustics Xiamen UniversityXiamen 361005China College of Engineering and Applied Sciences National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

In recent years,the integration of graphene and related two-dimensional(2D)materials in optical fbers have stimulated signifcant advances in ll-fber photonics and *** conventional passive silia fiber devices with 2D materials are empowered for enhancing light-matter interactions and are applied for manipulating light beams in respect of their polarization,phase,intensity and frequency,and even realizing the active photo-electric conversion and electro-optic modulation,which paves a new route to the integrated multifunctional ll-fber optoelectronic *** article reviews the fast-progress field of hybrid 2D-materials-optical fiber for the opto-electro-mechanical *** challenges and opportunities in this field for future development are discussed.

关键词： fiber optical polarization

Electromagnetic fields in ultra-peripheral relativistic heavy-ion collisions

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Nuclear Science and Techniques 2024年第2期35卷 103-109页

作者： Jie Zhao jin-hui chen Xu-Guang Huang Yu-Gang Ma Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Research Center for Theoretical Nuclear Physics NSFC and Fudan UniversityShanghai 200438China Physics Department and Center for Particle Physics and Field Theory Fudan UniversityShanghai 200438China

Ultra-peripheral heavy-ion collisions(UPCs)offer unique opportunities to study processes under strong electromagnetic *** these collisions,highly charged fast-moving ions carry strong electromagnetic fields that can be effectively treated as photon *** exchange of photons can induce photonuclear and two-photon interactions and excite *** excitation of the ions results in Coulomb dissociation with the emission of photons,neutrons,and other ***,the electromagnetic fields generated by the ions can be sufficiently strong to enforce mutual interactions between the two colliding ***,the two colliding ions experience an electromagnetic force that pushes them in opposite directions,causing a back-to-back correlation in the emitted *** a Monte Carlo simulation,we qualitatively demonstrate that the above electromagnetic effect is large enough to be observed in UPCs,which would provide a clear means to study strong electromagnetic fields and their effects.

关键词： Electromagnetic fields Neutrons Ultra-peripheral relativistic heavy-ion collisions(UPC)

Low-mass vector meson production at forward rapidity in p+p and d+Au collisions at (~SNN)^(1/2)=200 GeV from a multiphase transport model

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Nuclear Science and Techniques 2016年第4期27卷 78-82页

作者： Yi-Fei Xu Yong-jin Ye jin-hui chen Yu-Gang Ma Song Zhang chen Zhong Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049 China Shanghai Tech University Shanghai 200031 China

Low-mass vector meson(ρ, ω, and Ф) production at forward rapidity in p+p and d+Au collisions at (~SNN)^(1/2)=200 Ge V is studied within the framework of a multiphase transport model(AMPT). Detailed investigations, including the transverse momentum and the rapidity dependence of low-mass vector meson production in the AMPT model, show that the hadron interaction process is important for a quantitative description of the ρ and ω *** for the Ф meson, the strange quark production in the AMPT model with the string melting scenario describes the data reasonably well, while the default AMPT model under-predicts the data. The N(Ф)=N(ρ+ω) ratio from the AMPT model with the string melting scenario perfectly describes the data in p+p collisions. For the d+Au collisions, an increased trend of this ratio vs. transverse momentum and the number of participants are observed from the AMPT model. Our results indicate that a precise measurement of the N(Ф)=N(ρ+ω) ratio in d+Au and Au+Au collisions will shed more light on the strangeness production and its dynamics in quark–gluon plasma.

关键词：生产速度矢量介子输运模型低质量 SRT 碰撞 Au 多相

Charm hadron azimuthal angular correlations in Au+Au collisions at ■=200 GeV from parton scatterings

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Nuclear Science and Techniques 2019年第12期30卷 111-118页

作者： Hai Wang jin-hui chen Yu-Gang Ma Song Zhang Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Fudan UniversityShanghai 200433China

The dynamic evolution of the charm hadron in hot quark matter was studied in the framework of a multiphase transport(AMPT)*** first reproduced the open charm hadron D0pT spectrum in Au+Au collisions at √sNN=200 GeV by triggering the c c production in AMPT,and then the elliptic flow of charm hadrons was described with different parton cascade cross *** hadron azimuthal angular correlations were proposed,and they are affected by the different parton crosssection parameter applied in the model,which can facilitate our understanding of the loss of collision energy of charm quarks in hot quark medium and can stimulate further experimental studies.

关键词： Quark gluon plasma Heavy flavor Twoparticle correlations