In this paper we present a short overview on the dynamical holographic QCD(DhQCD)method for hadron physics and QCD matter.The five-dimensional DhQCD model is constructed in the graviton-dilaton-scalar framework with t...In this paper we present a short overview on the dynamical holographic QCD(DhQCD)method for hadron physics and QCD matter.The five-dimensional DhQCD model is constructed in the graviton-dilaton-scalar framework with the dilaton background fieldΦand the scalar field X dual to the gluon condensate and the chiral condensate operator thus can represent the gluodynamics(linear confinement)and chiral dynamics(chiral symmetry breaking),respectively.The dilaton background field and the scalar field are a function of the 5th dimension,which plays the role of the energy scale,in this way,the DhQCD model can resemble the renormalization group from ultraviolet(UV)to infrared(IR).By solving the Einstein equation,the metric structure at IR is automatically deformed by the nonperturbative gluon condensation and chiral condensation in the vacuum.We review the results on the hadron spectra including the glueball spectra,the light/heavy meson spectra,as well as on QCD phase transitions,and thermodynamical as well as transport properties in the framework of the DhQCD model.展开更多
In response to the capabilities presented by the High-Intensity Heavy Ion Accelerator Facility(HIAF) and the Accelerator-Driven Subcritical System(Ci ADS), as well as the proposed Chinese Advanced Nuclear Physics Rese...In response to the capabilities presented by the High-Intensity Heavy Ion Accelerator Facility(HIAF) and the Accelerator-Driven Subcritical System(Ci ADS), as well as the proposed Chinese Advanced Nuclear Physics Research Facility(CNUF), we are assembling a consortium of experts in relevant disciplines, both domestically and internationally,to delineate high-precision physics experiments that leverage the state-of-the-art research environment afforded by CNUF.Our focus encompasses six primary domains of inquiry: hadron physics—including endeavors such as the super eta factory and investigations into light hadron structures;muon physics;neutrino physics;neutron physics;the testing of fundamental symmetries;and the exploration of quantum effects within nuclear physics, along with the utilization of vortex accelerators.We aim to foster a well-rounded portfolio of large, medium, and small-scale projects, thus unlocking new scientific avenues and optimizing the potential of the Huizhou large scientific facility. The aspiration for international leadership in scientific research will be a guiding principle in our strategic planning. This initiative will serve as a foundational reference for the Institute of Modern Physics in its strategic planning and goal-setting, ensuring alignment with its developmental objectives while striving to secure a competitive edge in technological advancement. Our ambition is to engage in substantive research within these realms of high-precision physics, to pursue groundbreaking discoveries, and to stimulate progress in China's nuclear physics landscape, positioning Huizhou as a preeminent global hub for advanced nuclear physics research.展开更多
The X_(0)(2900),recently observed by the LHCb Collaboration in the D-K+invariant mass of the B+→D+D-K+process,is the first exotic candidate with four different flavors,beginning a new era for the hadron community.Und...The X_(0)(2900),recently observed by the LHCb Collaboration in the D-K+invariant mass of the B+→D+D-K+process,is the first exotic candidate with four different flavors,beginning a new era for the hadron community.Under the assumption that the Xo(2900)is a I(J^(P))=0(0+)D*K* hadronic molecule,we extracted the whole heavy-quark symmetry multiplet formed by the(D,D*)doublet and the K*meson.For the bound state case,there would be two additional I(J^(P))=0(1+)hadronic molecules associated with the DK*and D*K*channels,as well as one additional I(J^(P))=0(2+)D*K*molecule.In the light quark limit,they are 36.66 MeV and 34.22 MeV below the DK*and D*K*thresholds,respectively,which are unambiguously fixed by the mass position of the Xo(2900).For the virtual state case,there would be one additional I(J^(P))=0(1+)hadronic molecule,strongly coupled to the DK*channel,and one additional I(J^(P))=0(2+)D*K*molecule.Searching for these heavy quark spin partners will help shed light on the nature of the X_(0)(2900).展开更多
The inclusion of theρ−ωmixing effect is essential for a precise description of the pion electromagnetic form factor in the e+e−→π+π−process,which quantifies the two-pion contribution to the anomalous magnetic mom...The inclusion of theρ−ωmixing effect is essential for a precise description of the pion electromagnetic form factor in the e+e−→π+π−process,which quantifies the two-pion contribution to the anomalous magnetic moment of muon aμ.In this study,we analyze the momentum dependence ofρ−ωmixing by considering loop contributions at the next-to-leading order in 1/NC expansion within the framework of resonance chiral theory.We revisit a previous study[Y.H.Chen,D.L.Yao,and H.Q.Zheng,Commun.Theor.Phys.69,1(2018)]and consider the contribution arising from the kaon mass splitting in the kaon loops and latest experimental data.We perform two types of fits(with momentum-independent or momentum-dependentρ−ωmixing amplitude)to describe e+e−→π+π−andτ→ντ2πdata within the energy region of 600−900 MeV and decay width ofω→π+π−.Furthermore,we compare their results.Our findings indicate that the momentum-independent and momentum-dependentρ−ωmixing schemes provide appropriate descriptions of the data.However,the momentum-dependent scheme exhibits greater self-consistency,considering the reasonable imaginary part of the mixing matrix elementΠρωobtained.Regarding the contribution to the anomalous magnetic moment of the muon,aππμ|[0.6,0.9]GeV,the results obtained from the fits considering the momentum-dependentρ−ωmixing amplitude are in good agreement with those obtained without incorporating the momentum dependence ofρ−ωmixing,within the margin of errors.Furthermore,based on the fitted values of the relevant parameters,we observe that the decay width ofω→π+π−is predominantly influenced by theρ−ωmixing effect.展开更多
ηN interactions are investigated in hot magnetized asymmetric nuclear matter using the chiral SU(3)model and chiral perturbation theory(ChPT).In the chiral modcl,thc in-medium properties of η-mesons are calcu-lated ...ηN interactions are investigated in hot magnetized asymmetric nuclear matter using the chiral SU(3)model and chiral perturbation theory(ChPT).In the chiral modcl,thc in-medium properties of η-mesons are calcu-lated using medium modified scalar densities under the influence of an extermal magnetic field.Further,in a com-bined chiral model and ChPT approach,off-shell contributions of the ηN interactions are evaluated from the ChPTeffective ηN Lagrangian,and the in-medium effect of scalar densities are incorporated from the chiral SU(3)model.We find that the magnetic field has a significant effect on the in-medium mass and optical potential of η mesons,andwe observe a deeper mass-shift in the combined chiral model and ChPT approach than in the solo chiral SU(3)model.In both approaches,no additional mass-shift is observed due to the uncharged nature of η mesons in the presenceof a magnetic field.展开更多
Theoretical and computational advances have enabled not only the masses of the ground states,but also some of the low-lying excited states to be calculated using Lattice Gauge Theory.In this talk,I look at recent prog...Theoretical and computational advances have enabled not only the masses of the ground states,but also some of the low-lying excited states to be calculated using Lattice Gauge Theory.In this talk,I look at recent progress aimed at understanding the spectrum of baryon excited states,including both baryons composed of the light u and d quarks,and of the heavier quarks.I then describe recent work aimed at understanding the radiative transitions between baryons,and in particular the N-Roper transition.I conclude with the prospects for future calculations.展开更多
基金supported in part by the National Natural Science Foundation of China(NSFC)Grant Nos.11725523,11735007,11805084supported by the Strategic Priority Research Program of Chinese Academy of Sciences under Grant Nos.XDB34030000 and XDPB15+3 种基金the start-up funding from University of Chinese Academy of Sciences(UCAS)the Fundamental Research Funds for the Central Universitiesthe China Postdoctoral Science Foundation under Grant No.2021M703169Guangdong Pearl River Talents Plan under Grant No.2017GC010480
文摘In this paper we present a short overview on the dynamical holographic QCD(DhQCD)method for hadron physics and QCD matter.The five-dimensional DhQCD model is constructed in the graviton-dilaton-scalar framework with the dilaton background fieldΦand the scalar field X dual to the gluon condensate and the chiral condensate operator thus can represent the gluodynamics(linear confinement)and chiral dynamics(chiral symmetry breaking),respectively.The dilaton background field and the scalar field are a function of the 5th dimension,which plays the role of the energy scale,in this way,the DhQCD model can resemble the renormalization group from ultraviolet(UV)to infrared(IR).By solving the Einstein equation,the metric structure at IR is automatically deformed by the nonperturbative gluon condensation and chiral condensation in the vacuum.We review the results on the hadron spectra including the glueball spectra,the light/heavy meson spectra,as well as on QCD phase transitions,and thermodynamical as well as transport properties in the framework of the DhQCD model.
基金supported by the National Natural Science Foundation of China (Grant No.12075326)the Guangdong Basic and Applied Basic Research Foundation (Grant No.2025A1515010669)+2 种基金the Natural Science Foundation of Guangzhou (Grant No.2024A04J6243)the Fundamental Research Funds for the Central Universities in Sun Yat-sen University (No.23xkjc017)the Innovation Training Program for bachelor students in Sun Yat-sen University。
文摘In response to the capabilities presented by the High-Intensity Heavy Ion Accelerator Facility(HIAF) and the Accelerator-Driven Subcritical System(Ci ADS), as well as the proposed Chinese Advanced Nuclear Physics Research Facility(CNUF), we are assembling a consortium of experts in relevant disciplines, both domestically and internationally,to delineate high-precision physics experiments that leverage the state-of-the-art research environment afforded by CNUF.Our focus encompasses six primary domains of inquiry: hadron physics—including endeavors such as the super eta factory and investigations into light hadron structures;muon physics;neutrino physics;neutron physics;the testing of fundamental symmetries;and the exploration of quantum effects within nuclear physics, along with the utilization of vortex accelerators.We aim to foster a well-rounded portfolio of large, medium, and small-scale projects, thus unlocking new scientific avenues and optimizing the potential of the Huizhou large scientific facility. The aspiration for international leadership in scientific research will be a guiding principle in our strategic planning. This initiative will serve as a foundational reference for the Institute of Modern Physics in its strategic planning and goal-setting, ensuring alignment with its developmental objectives while striving to secure a competitive edge in technological advancement. Our ambition is to engage in substantive research within these realms of high-precision physics, to pursue groundbreaking discoveries, and to stimulate progress in China's nuclear physics landscape, positioning Huizhou as a preeminent global hub for advanced nuclear physics research.
基金This work is partly supported by the National Natural Science Foundation of China(NSFC)and the Deutsche Forschungsgemeinschaft(DFG)through the funds provided to the Sino-German Collaborative Research Center“Symmetries and the Emergence of Structure in QCD”(NSFC Grant No.12070131001 and DFG Grant No.TRR110)Science and Technology Program of Guangzhou(2019050001)+1 种基金NSFC Grant No.12035007,Guangdong Provincial funding with(2019QN01X172)MWH and XYL are also supported by Entrepreneurship competition for College Students of SCNU。
文摘The X_(0)(2900),recently observed by the LHCb Collaboration in the D-K+invariant mass of the B+→D+D-K+process,is the first exotic candidate with four different flavors,beginning a new era for the hadron community.Under the assumption that the Xo(2900)is a I(J^(P))=0(0+)D*K* hadronic molecule,we extracted the whole heavy-quark symmetry multiplet formed by the(D,D*)doublet and the K*meson.For the bound state case,there would be two additional I(J^(P))=0(1+)hadronic molecules associated with the DK*and D*K*channels,as well as one additional I(J^(P))=0(2+)D*K*molecule.In the light quark limit,they are 36.66 MeV and 34.22 MeV below the DK*and D*K*thresholds,respectively,which are unambiguously fixed by the mass position of the Xo(2900).For the virtual state case,there would be one additional I(J^(P))=0(1+)hadronic molecule,strongly coupled to the DK*channel,and one additional I(J^(P))=0(2+)D*K*molecule.Searching for these heavy quark spin partners will help shed light on the nature of the X_(0)(2900).
基金the Fundamental Research Funds for the Central Universities(FRF-BR-19-001A)the National Natural Science Foundation of China(11975028,11974043)。
文摘The inclusion of theρ−ωmixing effect is essential for a precise description of the pion electromagnetic form factor in the e+e−→π+π−process,which quantifies the two-pion contribution to the anomalous magnetic moment of muon aμ.In this study,we analyze the momentum dependence ofρ−ωmixing by considering loop contributions at the next-to-leading order in 1/NC expansion within the framework of resonance chiral theory.We revisit a previous study[Y.H.Chen,D.L.Yao,and H.Q.Zheng,Commun.Theor.Phys.69,1(2018)]and consider the contribution arising from the kaon mass splitting in the kaon loops and latest experimental data.We perform two types of fits(with momentum-independent or momentum-dependentρ−ωmixing amplitude)to describe e+e−→π+π−andτ→ντ2πdata within the energy region of 600−900 MeV and decay width ofω→π+π−.Furthermore,we compare their results.Our findings indicate that the momentum-independent and momentum-dependentρ−ωmixing schemes provide appropriate descriptions of the data.However,the momentum-dependent scheme exhibits greater self-consistency,considering the reasonable imaginary part of the mixing matrix elementΠρωobtained.Regarding the contribution to the anomalous magnetic moment of the muon,aππμ|[0.6,0.9]GeV,the results obtained from the fits considering the momentum-dependentρ−ωmixing amplitude are in good agreement with those obtained without incorporating the momentum dependence ofρ−ωmixing,within the margin of errors.Furthermore,based on the fitted values of the relevant parameters,we observe that the decay width ofω→π+π−is predominantly influenced by theρ−ωmixing effect.
文摘ηN interactions are investigated in hot magnetized asymmetric nuclear matter using the chiral SU(3)model and chiral perturbation theory(ChPT).In the chiral modcl,thc in-medium properties of η-mesons are calcu-lated using medium modified scalar densities under the influence of an extermal magnetic field.Further,in a com-bined chiral model and ChPT approach,off-shell contributions of the ηN interactions are evaluated from the ChPTeffective ηN Lagrangian,and the in-medium effect of scalar densities are incorporated from the chiral SU(3)model.We find that the magnetic field has a significant effect on the in-medium mass and optical potential of η mesons,andwe observe a deeper mass-shift in the combined chiral model and ChPT approach than in the solo chiral SU(3)model.In both approaches,no additional mass-shift is observed due to the uncharged nature of η mesons in the presenceof a magnetic field.
基金Supported by US DOE Contract No.DE-AC05-06OR23177,under which Jeffer-son Science Associates,LLC operates Jefferson Laboratory
文摘Theoretical and computational advances have enabled not only the masses of the ground states,but also some of the low-lying excited states to be calculated using Lattice Gauge Theory.In this talk,I look at recent progress aimed at understanding the spectrum of baryon excited states,including both baryons composed of the light u and d quarks,and of the heavier quarks.I then describe recent work aimed at understanding the radiative transitions between baryons,and in particular the N-Roper transition.I conclude with the prospects for future calculations.
