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Hyperon-Nuclear Interactions From SU(3) Chiral Effective Field Theory

FRONTIERS IN PHYSICS (2020)

期刊

FRONTIERS IN PHYSICS

卷 8, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA

DOI: 10.3389/fphy.2020.00012

关键词

chiral Lagrangian; effective field theory; hyperon-nucleon interaction; flavor SU(3) symmetry; strangeness nuclear physics

类别

Physics, Multidisciplinary

资金

Deutsche Forschungsgemeinschaft (DFG) [TRR110]
CAS President's International Fellowship Initiative (PIFI) [2018DM0034]
VolkswagenStiftung [93562]

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Protocol

Reagent

摘要

The interaction between hyperons and nucleons has a wide range of applications in strangeness nuclear physics and is a topic of continuing great interest. These interactions are not only important for hyperon-nucleon scattering but also essential as basic input to studies of hyperon-nuclear few- and many-body systems including hypernuclei and neutron star matter. We review the systematic derivation and construction of such baryonic forces from the symmetries of quantum chromodynamics within non-relativistic SU(3) chiral effective field theory. Several applications of the resulting potentials are presented for topics of current interest in strangeness nuclear physics.

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Yong-Hui Lin, Hans-Werner Hammer, Ulf-G. Meissner

Summary: Using dispersion theory, the Sigma-to-Lambda transition form factors in electromagnetic interactions are calculated considering the pion electromagnetic form factor, SU(3) chiral perturbation theory, the baryon decuplet, and the pi pi- K coupled-channel effect. The electric form factor is significantly affected by the inclusion of the K channel, while the magnetic form factor is minimally affected. The uncertainties in the three-flavor chiral perturbation theory are estimated using a bootstrap sampling method.

EUROPEAN PHYSICAL JOURNAL A (2023)

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Article Physics, Particles & Fields

PccN states in a unitarized coupled-channel approach

Chao-Wei Shen, Yong-hui Lin, Ulf-G. Meissner

Summary: Using an effective Lagrangian with heavy quark spin symmetry, this study investigates the coupled-channel dynamics of the doubly charmed systems D-(*) Sigma((*))(c). The potential considered includes exchanges of pseudoscalar and vector mesons in the t-channel. By applying the first iterated solution of the N/ D method, several S-wave bound states with isospin I = 1/2 are discovered. These states correspond to open-charm partners of the hidden charm pentaquarks P-psi(N) observed by the LHCb Collaboration.

EUROPEAN PHYSICAL JOURNAL C (2023)

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Article Physics, Particles & Fields

Definition of gravitational local spatial densities for spin-0 and spin-1/2 systems

J. Yu. Panteleeva, E. Epelbaum, J. Gegelia, U-G Meissner

Summary: Using spherically symmetric sharply localized wave packets, we determine the details of defining the spatial densities corresponding to the gravitational form factors of spin-0 and spin-1/2 systems. The expressions for the spatial densities are provided in the frames with both zero and non-zero expectation values of the momentum operator.

EUROPEAN PHYSICAL JOURNAL C (2023)

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Article Astronomy & Astrophysics

Radiative corrections to elastic muon-proton scattering at low momentum transfers

Norbert Kaiser, Yong-Hui Lin, Ulf-G. Meissner

Summary: This study systematically calculates the order alpha/pi radiative corrections to elastic muon-proton scattering at low momentum transfers, including vacuum polarization, photon-loop form factors, two-photon exchange corrections, and soft photon radiation. The findings suggest that only minor terms from the photon-loop form factors of the proton and two-photon exchange depend on the predetermined proton structure.

PHYSICAL REVIEW D (2022)

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Article Computer Science, Artificial Intelligence

Three-body renormalization group limit cycles based on unsupervised feature learning

Bastian Kaspschak, Ulf-G Meissner

Summary: In this study, the researchers use a boosted ensemble of variational autoencoders and an elitist genetic algorithm to identify the two-body interactions that lead to limit cycles in a three-body system. They find that the inverse square potential is the only potential that minimizes the limit cycle loss, regardless of the hyperangle.

MACHINE LEARNING-SCIENCE AND TECHNOLOGY (2022)

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