Article
Physics, Nuclear
H. Kamada, M. Kohno, K. Miyagawa
Summary: Faddeev calculations with the incorporation of a 2 pi-exchange Lambda NN three-baryon force are performed to determine the separation energy of hypertriton, H-3(A). Repulsive contributions of the three-baryon force, on the order of 20 keV, are found depending on the NN interactions used. This effect is significant compared to the small separation energy of H-3(A).
Article
Physics, Nuclear
Xilin Zhang, R. J. Furnstahl
Summary: The researchers developed emulators for solving quantum three-body scattering problems using a combination of variational method and eigenvector continuation concept. The emulators were shown to be accurate and efficient through a nuclear-physics model, and the researchers argued that this strategy could be applied to other fields as well.
Article
Astronomy & Astrophysics
Ahmad Jafar Arifi, Daiki Suenaga, Atsushi Hosaka
Summary: This study investigates relativistic corrections of an order 1/m(2) in heavy baryon decays, finding that these corrections significantly improve decay properties by increasing decay widths and explaining a phenomenological suppression of the quark axial-vector coupling constant g(A)(q) in Σ(c)(2455) and Σ(c)(2520) decays.
Article
Physics, Multidisciplinary
Varese Salvador Timoteo
Summary: The study revisits the three-nucleon system with separable potentials and chiral forces, emphasizing computational aspects. Simplified forms of Faddeev equations for S-wave separable potentials and partial-wave projection with a chiral potential considering only one channel are discussed to provide clear computational details.
Article
Physics, Nuclear
H. Witala, J. Golak, R. Skibinski
Summary: The computational scheme presented in this study significantly reduces the time required for theoretical predictions based on chiral two- and three-nucleon forces, particularly for observables in the three-nucleon continuum. By solving a reduced number of Faddeev-type integral equations, the workload is minimized, enabling rapid computation of observables for various combinations of contact term strengths. The proposed emulator demonstrates high precision and the ability to accurately reproduce exact results, as shown in the example of elastic nucleon-deuteron scattering observables.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Multidisciplinary
H. Witala, J. Golak, R. Skibinski, K. Topolnicki
Summary: The study presents a perturbative approach for solving the three-nucleon continuum Faddeev equation, suitable for handling variable strengths of contact terms in a chiral three-nucleon force. Examples in nucleon-deuteron scattering and deuteron breakup reaction demonstrate high precision and capability to reproduce exact results. The perturbative approach significantly reduces computer time compared to exact treatment, making it valuable for fine-tuning three-nucleon Hamiltonian parameters.
Article
Physics, Multidisciplinary
Giuliano Giacalone, Chun Shen, Bjorn Schenke
Summary: The size of nucleons and their constituents are crucial in understanding the formation and fluctuations of the quark-gluon plasma produced in high-energy nuclear collision experiments. Recent hydrodynamic results show that the correlation between anisotropic flow and the mean transverse momentum of hadrons has a unique sensitivity to the nucleon size in off-central heavy-ion collisions. This finding has broad implications for future analyses of nucleus-nucleus collision data and deep inelastic scattering on protons and nuclei.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
M. R. Hadizadeh, M. Radin, F. Nazari
Summary: The matrix elements of relativistic nucleon-nucleon (NN) potentials are calculated directly from nonrelativistic potentials without partial wave decomposition. An iterative method is used to solve the integral equations for two-nucleon (2N) spin-singlet and spin-triplet states. Numerical analysis shows high accuracy in reproducing deuteron binding energy and neutron-proton elastic scattering using the relativistic NN potential obtained with CD-Bonn potential.
SCIENTIFIC REPORTS
(2021)
Article
Astronomy & Astrophysics
Nikolay Kivel
Summary: We study the relativistic corrections to the J/ψ decay into a proton-antiproton final state. By calculating the relativistic QCD corrections to the dominant decay amplitude, which only depend on the nucleon twist-3 light-cone distribution amplitudes, we find that the collinear factorization is also valid beyond the leading-order approximation. Our numerical estimates show that the relativistic correction can have a significant impact on the decay amplitude.
Article
Astronomy & Astrophysics
P. M. Copeland, Chueng-Ryong Ji, W. Melnitchouk
Summary: The study computes the self-energies of flavor SU(3) octet and decuplet baryons within a relativistic chiral effective theory framework, deriving the leading nonanalytic chiral behavior for the masses. A finite-range regularization consistent with Lorentz and gauge invariance is applied, and the relative importance of various meson-baryon loop contributions to the self-energies is numerically studied. A comparison is made between relativistic results and earlier approximations within the heavy baryon limit.
Article
Physics, Nuclear
Pierre Arthuis, Carlo Barbieri, Francesco Pederiva, Alessandro Roggero
Summary: Neutron matter, which is closely related to neutron stars and systems such as cold atom gases, is an interesting and computationally accessible system in nuclear physics. The configuration-interaction Monte Carlo (CIMC) method is a stochastic many-body technique that allows us to study strongly coupled systems. Unlike other quantum Monte Carlo methods used in nuclear physics, the CIMC method can be formulated directly in momentum space, making it efficient for utilizing nonlocal interactions. In this study, we extend the CIMC method to include three-nucleon interactions using the normal-ordered two-body approximation. We present results for the equation of state of neutron matter that are consistent with other many-body calculations using low-resolution chiral interactions, and also provide predictions for the momentum distribution and the static structure factor.
Article
Physics, Multidisciplinary
Roman Skibinski, Jacek Golak, Henryk Witala, Vaibhav Chahar, Evgeny Epelbaum, Andreas Nogga, Volodymyr Soloviov
Summary: In this study, the nucleon-induced deuteron breakup reaction is investigated using the Faddeev approach. The theoretical uncertainties in the predicted cross section, which depend on the value of the cutoff parameter, are determined. Predictions based on different potentials are compared, and the effects of the three-nucleon force are studied. The results show that the dependence of the cross sections on the regulator cutoff is moderate at 135 MeV and much stronger at 200 MeV, with up to 45% variation in specific kinematic configurations.
FRONTIERS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Xuezhi Wang, Qinglin Niu, Jinjuan Zhang, Mengjiao Lyu, Jian Liu, Chang Xu, Zhongzhou Ren
Summary: The study investigates the nucleon momentum distribution of Fe-56 using the axially deformed relativistic mean-field model and introduces the effects of nucleon-nucleon correlations based on phenomenological models. The research shows that the NMD is affected by both deformation and NN correlation effects in different momentum regions, and analyzes the relativistic effects on nuclear structures.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2021)
Article
Astronomy & Astrophysics
Y. L. Yang, P. W. Zhao
Summary: For the first time, a microscopic relativistic Hamiltonian is constructed based on the leading-order covariant pionless effective field theory and solved using a new relativistic ab initio method. The results provide insights into relativistic effects and many-body interactions in atomic nuclei.
Article
Astronomy & Astrophysics
E. Filandri, L. Girlanda
Summary: A complete set of relativistic nucleon-nucleon contact operators conserving parity and time-reversal has been identified. The corresponding non-relativistic operators contributing in the general reference frame have also been determined. The results indicate the existence of two free low-energy constants that parametrize an interaction dependent on the total nucleon pair momentum P, which is crucial in resolving the long-standing Ay problem in low-energy p-d scattering. Additionally, all remaining P-dependent interactions at the same order are uniquely determined as relativistic corrections.
Article
Astronomy & Astrophysics
M. Mihovilovic, G. Jin, E. Long, Y. -W. Zhang, K. Allada, B. Anderson, J. R. M. Annand, T. Averett, W. Bertozzi, W. Boeglin, P. Bradshaw, A. Camsonne, M. Canan, G. D. Cates, C. Chen, J. P. Chen, E. Chudakov, R. De Leo, X. Deng, A. Deltuva, A. Deur, C. Dutta, L. El Fassi, D. Flay, S. Frullani, F. Garibaldi, H. Gao, S. Gilad, R. Gilman, O. Glamazdin, J. Golak, S. Golge, J. Gomez, O. Hansen, D. W. Higinbotham, T. Holmstrom, J. Huang, H. Ibrahim, C. W. de Jager, E. Jensen, X. Jiang, M. Jones, H. Kamada, H. Kang, J. Katich, H. P. Khanal, A. Kievsky, P. King, W. Korsch, J. LeRose, R. Lindgren, H. -J. Lu, W. Luo, L. E. Marcucci, P. Markowitz, M. Meziane, R. Michaels, B. Moffit, P. Monaghan, N. Muangma, S. Nanda, B. E. Norum, K. Pan, D. S. Parno, E. Piasetzky, M. Posik, V. Punjabi, A. J. R. Puckett, X. Qian, Y. Qiang, X. Qui, S. Riordan, A. Saha, P. U. Sauer, B. Sawatzky, R. Schiavilla, B. Schoenrock, M. Shabestari, A. Shahinyan, S. Sirca, R. Skibinski, J. St John, R. Subedi, V. Sulkosky, W. Tireman, W. A. Tobias, K. Topolnicki, G. M. Urciuoli, M. Viviani, D. Wang, K. Wang, Y. Wang, J. Watson, B. Wojtsekhowski, H. Witala, Z. Ye, X. Zhan, Y. Zhang, X. Zheng, B. Zhao, L. Zhu
Article
Physics, Multidisciplinary
H. Witala, J. Golak, R. Skibinski, K. Topolnicki, E. Epelbaum, K. Hebeler, H. Kamada, H. Krebs, U. -G. Meissner, A. Nogga
Article
Nanoscience & Nanotechnology
Yong Sun, Kenta Kirimoto, Hiroyuki Kamada, Koichi Onishi, Daichi Etoh, Shohei Yoshimura, Shigeru Kanemitsu
Article
Physics, Multidisciplinary
H. Kamada
Article
Physics, Nuclear
N. G. Kelkar, H. Kamada, M. Skurzok
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2019)
Article
Physics, Multidisciplinary
Hiroyuki Kamada, Jacek Golak
Summary: In this study, a full symmetrizer (antisymmetrizer) S-N for a system of N identical bosons (fermions) is defined, which can be built recursively as a product of simple permutation operators. The N-body Faddeev equation is rewritten using this form of S-N, which significantly simplifies the process of building the N-body wave function. This formulation can be extended to include three- and other many-body forces.
Article
Physics, Multidisciplinary
A. Arslanaliev, P. Frolov, J. Golak, H. Kamada, A. Shebeko, R. Skibinski, M. Stepanova, H. Witala
Summary: The Kharkov potential is a new field theoretical model of nucleon-nucleon interaction built within the framework of relativistic dynamics and unitary clothing transformations. By revisiting best-fit values for adjustable parameters in the clothed particle representation, the model aims to address inconsistencies in constructing 2N and 3N force models.
Article
Physics, Multidisciplinary
Htun Htun Oo, Hiroyuki Kamada
Summary: In this study, we constructed a folding potential between alpha and Lambda particles and analyzed the binding energy of He-5(Lambda) using different potential models. The experimental results are consistent with the predictions of the folding potential model within the error range, but the calculations using realistic potentials result in overbinding.
Article
Physics, Nuclear
A. Grassi, J. Golak, W. N. Polyzou, R. Skibinski, H. Witala, H. Kamada
Summary: We have developed a relativistic model that allows for calculations of cross sections and polarization observables in electron and neutrino scattering experiments with deuteron targets. The dynamics of strong interactions are described by a unitary representation of the Poincare group, with the same representations for space translations and rotations in both interacting and noninteracting states. Our model uses the Argonne V18 potential to reproduce experimental observables for deuteron binding energy and nucleon-nucleon scattering. It is applicable to processes where the internal energy of two nucleons is below the threshold for pion production, but the momentum transfer extends to several GeV.
Article
Physics, Nuclear
P. Maris, R. Roth, E. Epelbaum, R. J. Furnstahl, J. Golak, K. Hebeler, T. Huether, H. Kamada, H. Krebs, H. Le, Ulf -G. Meissner, J. A. Melendez, A. Nogga, P. Reinert, R. Skibinski, J. P. Vary, H. Witala, T. Wolfgruber
Summary: This paper presents a comprehensive investigation on few-nucleon systems as well as light and medium-mass nuclei, using the current Low Energy Nuclear Physics International Collaboration two-nucleon interactions and three-nucleon forces. By considering higher-order corrections and performing correlated truncation error analysis, the resulting Hamiltonian is shown to successfully predict various observables and spectra of nucleon-deuteron scattering and light p-shell nuclei. However, the charge radii are found to be underpredicted by approximately 10% for the oxygen isotopes and almost 20% for 40Ca and 48Ca.
Article
Physics, Nuclear
J. Golak, R. Skibinski, K. Topolnicki, H. Witala, A. Grassi, H. Kamada, L. E. Marcucci
Article
Physics, Nuclear
E. Epelbaum, J. Golak, K. Hebeler, T. Huether, H. Kamada, H. Krebs, P. Maris, Ulf-G Meissner, A. Nogga, R. Roth, R. Skibinski, K. Topolnicki, J. P. Vary, K. Vobig, H. Witala
Article
Physics, Nuclear
J. Golak, R. Skibinski, K. Topolnicki, H. Witala, A. Grassi, H. Kamada, A. Nogga, L. E. Marcucci
Article
Physics, Nuclear
J. Golak, R. Skibinski, K. Topolnicki, H. Witala, A. Grassi, H. Kamada, L. E. Marcucci
Article
Physics, Nuclear
K. Miyagawa, J. Haidenbauer, H. Kamada