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相关论文: $\Sigma$-nuclear spin-orbit coupling from two-pion…

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Nuclear spins are known to experience spontaneous long-range correlations only below 2.5 mili-Kelvin in superfluid $^3$He. Here we present the first evidence of nuclear spin coupling in molecular hydrogen (H$_2$) at 74-92 Kelvin using…

材料科学 · 物理学 2016-02-05 Raina J. Olsen , Jon W. Taylor , Cristian I. Contescu , James R. Morris

We revisit the classical relation between the strangeness content of the nucleon, the pion-nucleon sigma term and the $SU(3)_F$ breaking of the baryon masses in the context of Lorentz covariant chiral perturbation theory with explicit…

高能物理 - 唯象学 · 物理学 2014-02-18 J. M. Alarcon , L. S. Geng , J. Martin Camalich , J. A. Oller

Coupled channels model of meson-baryon interactions based on the effective chiral Lagrangian is extended to account explicitly for the $\Sigma(1385)$ resonance that dominates the $P$-wave $\bar{K}N$ and $\pi\Sigma$ interactions at energies…

核理论 · 物理学 2015-05-08 Aleš Cieplý , Vojtěch Krejčiřík

The work that Peter Schuck and I carried out during the nineties in collaboration with the Lyon and Darmstadt theory groups is summarized. I retrace how our theoretical developments combined with experimental results concerning the…

核理论 · 物理学 2023-10-31 Guy Chanfray

It was pointed out [Phys. Rev. C \textbf{91}, 021302(R)] that the isotope shifts of the Pb nuclei, the kink at $N=126$ in particular, can be well described by the Hartree-Fock-Bogolyubov calculations if a density-dependent LS interaction…

核理论 · 物理学 2015-10-12 H. Nakada

Pairing correlations play a very important role in atomic nuclei. Although several effective pairing interactions have been used in mean field calculations for nucleons, little is known about effective pairing interactions for hyperons.…

核理论 · 物理学 2021-08-03 Yu-Ting Rong , Pengwei Zhao , Shan-Gui Zhou

Kitaev interactions underlying a quantum spin liquid have been long sought, but experimental data from which their strengths can be determined directly is still lacking. Here, by carrying out inelastic neutron scattering measurements on…

As a nuclear spin model of scalable quantum register, the one-dimensional chain of the magnetic atoms with nuclear spins 1/2 substituting the basic atoms in the plate of nuclear spin free easy-axis 3D antiferromagnet is considered. It is…

量子物理 · 物理学 2008-12-02 A. A. Kokin , V. A. Kokin

The so-called neutron spin resonance consists of a prominent enhancement of the magnetic response at a particular energy and momentum transfer upon entering the superconducting state of unconventional superconductors. In the case of…

超导电性 · 物理学 2019-06-21 Daniel D. Scherer , Brian M. Andersen

In the weak ferromagnetic MnCO$_3$ system, a low-frequency collective spin excitation (magnon) is the hybridized oscillation of nuclear and electron spins coupled through the hyperfine interaction. By using a split-ring resonator, we…

介观与纳米尺度物理 · 物理学 2015-06-05 Leonid V. Abdurakhimov , Yuriy M. Bunkov , Denis Konstantinov

We extend a recent chiral approach to nuclear matter by including the most general (momentum-independent) NN-contact interaction. Iterating this two-parameter contact-vertex with itself and with one-pion exchange the emerging energy per…

核理论 · 物理学 2009-11-10 S. Fritsch , N. Kaiser

Hybridized nuclear and electron spin excitation in a MnCO$_3$ crystal, a weakly-anisotropic antiferromagnet, has been investigated. In this material, the hyperfine interaction is strong enough to form a nuclear spin wave. We measure the…

We explore a spin-fermion model with fermion-spin-quadrupolar interaction. In a nematic phase, this interaction reduces to a four-fermion interaction that is a basis of superconductivity. When the coupling constant is positive the…

超导电性 · 物理学 2020-04-22 Naoum Karchev

$\gamma$-triclinic and $\alpha$-monoclinic polymorphs of CoV$_{2}$O$_{6}$ are two of the few known transition metal ion based materials that display stepped $1/3$ magnetization plateaus at low temperatures. Neutron diffraction [M. Markkula…

The leading contribution to the three-pion exchange nucleon-nucleon potential is calculated in the framework of chiral symmetry. It has pseudoscalar and axial components and is dominated by the former, which has a range of about 1.5 fm and…

核理论 · 物理学 2009-10-31 J. C. Pupin , M. R. Robilotta

In this work we study the production of $\Sigma$ and $\Lambda$ hyperons in strangeness changing $\Delta S = -1$ charged current interactions of muon antineutrinos on nuclear targets. At the nucleon level, besides quasielastic scattering we…

高能物理 - 唯象学 · 物理学 2024-01-08 M. Benitez Galan , L. Alvarez-Ruso , M. Rafi Alam , I. Ruiz Simo , M. J. Vicente Vacas

Several realistic spin-orbital models for transition metal oxides go beyond the classical expectations and could be understood only by employing the quantum entanglement. Experiments on these materials confirm that spin-orbital entanglement…

强关联电子 · 物理学 2020-09-25 Dorota Gotfryd , Ekaterina Paerschke , Krzysztof Wohlfeld , Andrzej M. Oles

It has been argued that the leading scalar-isoscalar WIMP-nucleus interactions receive parametrically enhanced contributions in the context of nuclear effective field theories. These contributions arise from meson-exchange currents (MECs)…

高能物理 - 唯象学 · 物理学 2015-03-19 S. R. Beane , S. D. Cohen , W. Detmold , H. -W. Lin , M. J. Savage

The coupling of the breathing and rotational modes of the skyrmion-skyrmion system leads to a nucleon-nucleon spin-orbit interaction of short range, as well as to spin-orbit potentials for the transitions $NN \to N(1440)N$, $NN \to…

核理论 · 物理学 2009-10-30 A. P. Kobushkin , D. O. Riska