Article
Physics, Nuclear
Zi-Long Li, Xing-Yue Tan, Zhu-Feng Zhang, Zhen-Yang Wang, Xin-Heng Guo
Summary: In this study, we systematically investigated systems with two pseudoscalar mesons and obtained some conclusions by numerically solving the Bethe-Salpeter equation.
Article
Astronomy & Astrophysics
Fu-Lai Wang, Rui Chen, Xiang Liu
Summary: This study systematically investigates the S-wave interactions between a pair of charmed mesons and proposes potential candidates for doubly charmed molecular tetraquark states. The authors suggest further experiments by LHCb or Belle II to search for these predicted states near the energy thresholds.
Article
Physics, Particles & Fields
Jing-Juan Qi, Zhen-Yang Wang, Zhu-Feng Zhang, Xin-Heng Guo
Summary: In this study, the X1(2900) is interpreted as an S-wave D1K molecular state using the Bethe-Salpeter equation approach with ladder and instantaneous approximations. By numerically solving the equation with a kernel containing one-particle-exchange diagrams and introducing three different form factors in the vertices, the existence of a bound state is confirmed. Furthermore, the decay width of X1(2900) decaying to D-K+ is also investigated.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Nuclear
Dan Song, Shu Chen, Shu-Yi Kong, Jun He
Summary: In this work, we investigate the molecular states composed of two charmed strange baryons and their hidden-charm hidden-strange partners. Using the heavy quark chiral effective Lagrangians, we describe the interactions between the charmed strange baryons with light meson exchanges. The potential kernels are constructed and inserted into the quasipotential Bethe-Salpeter equation. The results suggest the presence of strong attractions between the charmed strange baryons, forming bound states.
Article
Astronomy & Astrophysics
A. Castro, W. de Paula, T. Frederico, G. Salme
Summary: The Bethe-Salpeter equation for a pseudoscalar bound-system is solved in Minkowski space using the Nakanishi integral representation of the Bethe-Salpeter amplitude, with a ladder kernel featuring massive gluons, dynamically-dressed quark mass function, and an extended quark-gluon vertex. Quark dressing is implemented through a phenomenological ansatz tuned by lattice QCD calculations. The framework allows investigating gluon dynamics in the physical space. The first results for low-density pseudoscalar systems are presented to understand the interplay between gluonic phenomena.
Review
Astronomy & Astrophysics
Vladimir A. Karmanov
Summary: This passage discusses the possibility of systems dominated by exchange particles, which are mainly composed of massless particles moving at the speed of light and cannot be described by the Schrodinger equation.
Article
Astronomy & Astrophysics
Tian-Wei Wu, Ya-Wen Pan, Ming-Zhu Liu, Jun-Xu Lu, Li-Sheng Geng, Xiao-Hai Liu
Summary: This study investigates the existence of a three-body Sigma(c) DK bound state, similar to the first hidden charm pentaquark state discovered by the LHCb Collaboration. By solving the Schrodinger equation, the researchers found an excited hidden charm exotic state with strangeness, P-cs(*)(4739), and analyzed its strong decays, primarily into D Xi(')(c) and D-s(*)Sigma(c) with decay widths in the tens of MeV range.
Article
Optics
Peter L. Hagelstein
Summary: A moving nucleus undergoes Lorentz contraction and spin rearrangement due to relativity. Vibrations in a molecule or solid cause minor relativistic modifications in a oscillating nucleus, indicating a relativistic phonon-nuclear interaction. The derivation of the lowest-order interaction is reviewed using the many-particle Dirac model. The lowest-order phonon-nuclear interaction obtained from the covariant two-body Bethe-Salpeter model is similar to the interaction obtained from the Dirac model, indicating that it is not an artifact. Matrix elements of the lowest-order interaction are expressed in terms of one-body operators, facilitating evaluation and quantitative estimation of the magnitude.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
David Amblard, Gabriele D'Avino, Ivan Duchemin, Xavier Blase
Summary: Defect energy levels in hexagonal boron nitride with varying number of layers were studied using a fragment many-body GW formalism. It was found that a single layer can be fragmented to faithfully reproduce the effect of the dielectric environment. The evolution of defect energy levels from monolayer to multilayer systems follows a simple pattern, allowing safe extrapolation of results to few layers, surface, or bulk h-BN.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Multidisciplinary
Bao-Xi Sun, Ying-Ying Fan, Qin-Qin Cao
Summary: The ALICE Collaboration has recently reported a strong attractive interaction between the phi meson and the proton. The corresponding scattering length f(0) is calculated to be Re( f(0)) = 0.85 +/- 0.34(stat)+/- 0.14(syst) and Im(f(0)) = 0.16 +/- 0.10(stat)+/- 0.09(syst) fm. The dominance of elastic scattering is indicated by the significant real part compared to the imaginary part.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2023)
Article
Chemistry, Physical
Iryna Knysh, Kelvine Letellier, Ivan Duchemin, Xavier Blase, Denis Jacquemin
Summary: The study investigates the mixing between charge transfer (CT) and local excited (LE) characters upon twisting of N-phenylpyrrole (N-PP) geometry using theoretical calculations of six low-lying singlet excited states (ES). Results show that the Bethe-Salpeter equation (BSE) formalism is more reliable than Time-Dependent Density Functional Theory (TD-DFT) for close-lying ES with mixed CT/LE nature. BSE/GW provides a more accurate evolution of the excited state potential energy surfaces (PES) with negligible exchange-correlation functional starting point dependency.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Yi Yao, Dorothea Golze, Patrick Rinke, Volker Blum, Yosuke Kanai
Summary: We present an accurate computational approach to calculate absolute K-edge core electron excitation energies as measured by X-ray absorption spectroscopy. The method is based on the Bethe-Salpeter equation and GW quasiparticle energies, and takes into account various numerical approximations and basis sets. The results show excellent agreement with experimental data, demonstrating the high accuracy of the method.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2022)
Article
Chemistry, Physical
Paul N. Day, Ruth Pachter, Kiet A. Nguyen
Summary: In this study, theoretical investigations were carried out on phosphine-ligated gold clusters using mass-selective electronic absorption photofragmentation spectroscopy. The calculated optical absorption spectra showed good agreement with experimental measurements. The study also included a theoretical evaluation of two-photon absorption cross-sections.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Yi Yao, Dorothea Golze, Patrick Rinke, Volker Blum, Yosuke Kanai
Summary: This article presents an accurate computational approach to calculate absolute K-edge core electron excitation energies using numeric atom-centered orbitals (NAOs). The method is validated by comparing the results with experimental data and demonstrates excellent agreement.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2022)
Article
Materials Science, Multidisciplinary
Michael Winter, Manon H. E. Bousquet, Denis Jacquemin, Ivan Duchemin, Xavier Blase
Summary: The study revealed a luminescence zero-phonon energy of 4.36 eV in the carbon-dimer defect in h-BN monolayer, including contributions from zero-point vibrational energy and reorganization energy. Interlayer screening further decreased the emission energy by about 0.3 eV. The comparisons with optical gaps suggested a large excitonic binding energy of 3 eV for the associated localized Frenkel exciton.
PHYSICAL REVIEW MATERIALS
(2021)
