The prospects to study hyperon-nucleus/nucleon interactions at BESIII and similar e^(+)e^(-)colliders are analyzed in this paper.Utilizing the large quantity of hyperons produced by the decay of 10 billion J/■and 2.7...The prospects to study hyperon-nucleus/nucleon interactions at BESIII and similar e^(+)e^(-)colliders are analyzed in this paper.Utilizing the large quantity of hyperons produced by the decay of 10 billion J/■and 2.7 billion(3686)collected at BESIII,the cross sections of several specific elastic and inelastic hyperon-nucleus reactions can be measured via scattering between hyperons and nucleus in the dense objects of the BESIII detector.Subsequently,the cross sections of the corresponding hyperon-nucleon interactions can be extracted from further phenomenological calculations.The interactions between antihyperons and nucleus/nucleon,including scattering and annihilation,can also be studied using the method proposed in this study.The results will definitely benefit the realization of precise probes for hyperon-nuclei/nucleus interactions and establish constraints to study the potential of strong interaction,the origin of color confinement,a unified model for baryon-baryon interactions,and the internal structure of neutron stars.In addition,the desirable prospects of corresponding studies in the future Super Tau-Charm Factory(STCF)are discussed and estimated in this study.展开更多
We apply a recently proposed covariant power counting in nucleon-nucleon interactions to study strangeness S =-1 ΛN-Σ N interactions in chiral effective field theory. At leading order, Lorentz invariance introduces ...We apply a recently proposed covariant power counting in nucleon-nucleon interactions to study strangeness S =-1 ΛN-Σ N interactions in chiral effective field theory. At leading order, Lorentz invariance introduces 12 low energy constants, in contrast to the heavy baryon approach, where only five appear. The Kadyshevsky equation is adopted to resum the potential in order to account for the non-perturbative nature of hyperon-nucleon interactions.A fit to the 36 hyperon-nucleon scattering data points yields χ2 16, which is comparable with the sophisticated phenomenological models and the next-to-leading order heavy baryon approach. However, one cannot achieve a simultaneous description of the nucleon-nucleon phase shifts and strangeness S =-1 hyperon-nucleon scattering data at leading order.展开更多
We report on new attempt to investigate baryon-baryon interactions in lattice QCD.From the Bethe-Salpeter （BS） wave function,we have successfully extracted the nucleon-nucleon （NN） potentials in quenched QCD simul...We report on new attempt to investigate baryon-baryon interactions in lattice QCD.From the Bethe-Salpeter （BS） wave function,we have successfully extracted the nucleon-nucleon （NN） potentials in quenched QCD simulations,which reproduce qualitative features of modern NN potentials.The method has been extended to obtain the tensor potential as well as the central potential and also applied to the hyperonnucleon （YN） interactions,in both quenched and full QCD.展开更多
Hypernuclear physics has become very exciting owing to new epoch-making experimental data. Recent progress in theoretical and experimental studies of hypernuclei and future developments in this field are discussed.
The complexity of threshold phenomena is exemplified on a prominent and long-known case-the structure in theΛp cross section(invariant mass spectrum)at the opening of the∑N channel.The mass splitting between the∑ba...The complexity of threshold phenomena is exemplified on a prominent and long-known case-the structure in theΛp cross section(invariant mass spectrum)at the opening of the∑N channel.The mass splitting between the∑baryons together with the angular momentum coupling in the^(3)S_(1)-^(3)D_(1)partial wave imply that,in principle,up to six channels are involved.Utilizing hyperon-nucleon potentials that provide an excellent description of the available low-energy Λp and∑N scattering data,the shape of the resulting Λp cross section is discussed and the poles near the ∑N threshold are determined.Evidence for a strangeness S=-1 dibaryon is provided,in the form of a(unstable)∑N bound state in the vicinity of the ∑N threshold.Predictions for level shifts and widths of ∑^(-)p atomic states are given.展开更多
The paper gives a brief introduction into the COSY-facility, the currently used detector systems （ANKE, TOF and WASA） and the targets （cluster jet, pellet and ABS）, and it presents some recent results, which were ...The paper gives a brief introduction into the COSY-facility, the currently used detector systems （ANKE, TOF and WASA） and the targets （cluster jet, pellet and ABS）, and it presents some recent results, which were obtained in the field of baryon excited states.展开更多
基金Supported by the National Natural Science Foundation of China(NSFC)(11935018,11875054,12165022)the Chinese Academy of Sciences(CAS)Key Research Program of Frontier Sciences(QYZDJ-SSW-SLH003)the Fundamental Research Project of Yunnan Province,China(202301AT070162)。
文摘The prospects to study hyperon-nucleus/nucleon interactions at BESIII and similar e^(+)e^(-)colliders are analyzed in this paper.Utilizing the large quantity of hyperons produced by the decay of 10 billion J/■and 2.7 billion(3686)collected at BESIII,the cross sections of several specific elastic and inelastic hyperon-nucleus reactions can be measured via scattering between hyperons and nucleus in the dense objects of the BESIII detector.Subsequently,the cross sections of the corresponding hyperon-nucleon interactions can be extracted from further phenomenological calculations.The interactions between antihyperons and nucleus/nucleon,including scattering and annihilation,can also be studied using the method proposed in this study.The results will definitely benefit the realization of precise probes for hyperon-nuclei/nucleus interactions and establish constraints to study the potential of strong interaction,the origin of color confinement,a unified model for baryon-baryon interactions,and the internal structure of neutron stars.In addition,the desirable prospects of corresponding studies in the future Super Tau-Charm Factory(STCF)are discussed and estimated in this study.
基金Supported by the National Natural Science Foundation of China(11375024,11522539,11375120)the China Postdoctoral Science Foundation(2016M600845,2017T100008)the Fundamental Research Funds for the Central Universities
文摘We apply a recently proposed covariant power counting in nucleon-nucleon interactions to study strangeness S =-1 ΛN-Σ N interactions in chiral effective field theory. At leading order, Lorentz invariance introduces 12 low energy constants, in contrast to the heavy baryon approach, where only five appear. The Kadyshevsky equation is adopted to resum the potential in order to account for the non-perturbative nature of hyperon-nucleon interactions.A fit to the 36 hyperon-nucleon scattering data points yields χ2 16, which is comparable with the sophisticated phenomenological models and the next-to-leading order heavy baryon approach. However, one cannot achieve a simultaneous description of the nucleon-nucleon phase shifts and strangeness S =-1 hyperon-nucleon scattering data at leading order.
基金supported in part by the National Key Research and Development Program of China(2022YFA1604900)the National Natural Science Foundation of China(NSFC)(12025501)+1 种基金supposed in part by the NSFC(11890710,11890714,and 12147101)funded by the U.S.DOE Office of Science(DEsc0012704,DE-FG02-10ER41666,DE-AC02-98CH10886,and DEKB0201022)。
基金Supported by Grants-in-Aid of the Ministry of Education,Culture,Sports,Science and Technology of Japan (20340047,20105001,20105003)
文摘We report on new attempt to investigate baryon-baryon interactions in lattice QCD.From the Bethe-Salpeter （BS） wave function,we have successfully extracted the nucleon-nucleon （NN） potentials in quenched QCD simulations,which reproduce qualitative features of modern NN potentials.The method has been extended to obtain the tensor potential as well as the central potential and also applied to the hyperonnucleon （YN） interactions,in both quenched and full QCD.
文摘Hypernuclear physics has become very exciting owing to new epoch-making experimental data. Recent progress in theoretical and experimental studies of hypernuclei and future developments in this field are discussed.
基金Supported in part by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)the Sino-German Collaborative Research Center CRC 110"Symmetries and the Emergence of Structure in QCD"(DFG Project-ID 196253076-TRR 110,Grant No.12070131001)+2 种基金the EU(STRONG2020)the Chinese Academy of Sciences(CAS)President's International Fellowship Initiative(PIFI)(2018DM0034)VolkswagenStiftung(93562)。
文摘The complexity of threshold phenomena is exemplified on a prominent and long-known case-the structure in theΛp cross section(invariant mass spectrum)at the opening of the∑N channel.The mass splitting between the∑baryons together with the angular momentum coupling in the^(3)S_(1)-^(3)D_(1)partial wave imply that,in principle,up to six channels are involved.Utilizing hyperon-nucleon potentials that provide an excellent description of the available low-energy Λp and∑N scattering data,the shape of the resulting Λp cross section is discussed and the poles near the ∑N threshold are determined.Evidence for a strangeness S=-1 dibaryon is provided,in the form of a(unstable)∑N bound state in the vicinity of the ∑N threshold.Predictions for level shifts and widths of ∑^(-)p atomic states are given.
文摘The paper gives a brief introduction into the COSY-facility, the currently used detector systems （ANKE, TOF and WASA） and the targets （cluster jet, pellet and ABS）, and it presents some recent results, which were obtained in the field of baryon excited states.
