Two-body $J^{\pi}= 0^+$, $1^+$ and $2^+$ resonances of the $Y_c$ ($=\Lambda_c$, $\Sigma_c$, or $\Sigma_c^*$) and N systems are analyzed by the use of the complex scaling method. We employ the $Y_c N$ phenomenological potentials, which are composed of the long-range meson-exchange force and the short-range quark exchange force. We find four Feshbach-type resonance states slightly below the...
It is shown that the existence and the creation of a monopole in Non Abelian Gauge Theories are gauge invariant and Abelian Projection independent concepts.
This puts on a firmer basis the construction of an order parameter for confinement.It also suggests a reinterpretation of old lattice data on monopoles.
We investigate kaon-nucleon interactions in the Skyrme model with the new quantization method. It is based on the bound state approach but is more suited to the weakly bound system. The spatially extended structure of the nucleon as a soliton enables to express the interaction as an $r$-dependent potential. We find that for the isospin 0 antikaon-nucleon system the potential consists of an...
A new radioactive ion beam accelerator RAON is being constructed at the Institute for Basic Science (IBS) in Korea. Among various experimental devices, the large-acceptance multipurpose spectrometer (LAMPS) will be available in the high-energy experimental hall at RAON. The main goal of the LAMPS detector system is to investigate the nuclear equation of state and symmetry energy at...
Recently, the study of the exotic hadron is of current interest in the Nuclear and Hadron physics. In particular, the charged quarkonia, such as Zc(3900), having the genuinely exotic structure attract a lot of interest. The exotic states near the hadron-hadron threshold have been considered to be a hadronic molecule, while the hadron-hadron interaction is not established yet in the heavy...
QCD dynamics under a strong magnetic field is of great interest to the field of relativistic heavy-ion collisions and magnetars. In this talk, I will discuss a new effect we recently found in Ref.[1], 'Hadronic Paschen-Back effect (HPBE)', which is analogous to the Paschen-Back effect observed in atomic physics.
This effect is induced by the interplay between a strong magnetic field and finite...
The exterior electromagnetic fields of slowly rotating relativistic magnetized star in the braneworld are studied in detail. The dependence of the electromagnetic energy losses of the rotating magnetized star from the brane tension is also calculated and has been combined with the astrophysical data on pulsar period slow down in order to get constraints on the brane parameter. We have found...
Einstein gravity pronounced that black hole can be formed as a consequence of gravitational collapse, and Penrose later proposed in 1969 that a singularity would always be hidden behind a horizon. This is what is called Cosmic Censorship Conjecture (CCC). There exists no proof of the conjecture that it has remained unproven yet in either way, true or false. Thus, the physical possibility of...
Plasma magnetosphere surrounding rotating magnetized neutron star in the braneworld has been studied. Goldreich-Julian charge density in plasma magnetosphere is analyzed for the misaligned neutron star with two different values of the inclination angle ($\chi=0$ and $\chi=\pi/2$) between magnetic field and rotation axis.The system of Maxwell equations in spacetime of slowly rotating star in...
In a recent study by Cole et al. [A. L. Cole et al., Phys. Rev. C 86 (2012) 015809], it was concluded that quasi-particle random phase approximation (QRPA) calculations show larger deviations and overestimate the total experimental Gamow–Teller (GT) strength. It was also concluded that QRPA calculated electron capture rates exhibit larger deviation than those derived from the measured GT...
In the present work, a new asymptotical theory is proposed for the peripheral sub- and above-barrier transfer $A(x,y)B$ reaction in the framework of a three-body model, where $x=y+a$, $B=A+a$ and $a$ is a transferred particle. The asymptotic theory is based on the idea of the fact that, firstly, a peripheral reaction is governed by the nearest to the physical region $(-1\le\cos\theta\le 1)$...
Resonant reactions play an important role in astrophysics as they might significantly enhance the cross section with respect to the direct reaction contribution and alter the nucleosynthetic flow. Moreover, resonances bear information about states in the intermediate compound nucleus formed in the reaction. However, nuclear reactions in stars take place at energies well below ∼1 MeV and the...
In recent years, the Trojan Horse Method (THM) has been used to investigate the low-energy cross sections of several reactions of interest for Astrophysics. We present two cases in which the application of THM reaction rates has modified the prediction of stellar nucleosynthesis. In the first case, the determination of the strengths of the 20 keV and 65 keV resonances in the...
The astrophysical S-factor and reaction rate of the direct capture process $\alpha+d \rightarrow {}^6{\rm Li} + \gamma$, as well as the abundance of the 6Li element are estimated in a three-body model. The initial state is factorized into the deuteron bound state and the $\alpha+d$ scattering state. The final nucleus $^6$Li(1+) is described as a three-body bound state $\alpha+ n + p$ in the...
In the present work, the results of the analysis of the experimental astrophysical $S$ factors (AS) $S^{\exp}(E)$ [1,2] for the nuclear-astrophysical $d(\alpha,\gamma){}^6{\rm Li}$ reaction directly measured at extremely low energies E are presented. One notes that the $d(\alpha,\gamma){}^6{\rm Li}$ reaction is of great interest as one of the sources of the 6Li creation in the early...
One of the most interesting problems in heavy-ion physics is an identification of the reactions which are called deep-inelastic collisions, quasifission and fusion-fission. These reactions are called binary reactions and their mechanisms are in competition to synthesis of superheavy elements in the different stages of formation of evaporation residue which is considered as a superheavy...
The astrophysical S-factor and reaction rates of the direct capture processes $^3$He(α, γ)$^7$Be and $^3$H(α, γ)$^7$Li, as well as the abundance of the $^7$Li/H element are studied in the framework of the two-body model with potentials of a simple Gaussian form, which describe correctly the phase shifts in the s, p, d, and f waves, as well as the binding energy and the asymptotic normalization...
The advent of Radioactive Ion Beam facilities and subsequent explosive growth in the studies of neutron rich nuclei near the drip line have opened up new vistas in modern nuclear physics. The discovery of halo structures, both 1-neutron and 2-neutron halos, in neutron-rich, light nuclei has been a significant development in nuclear structure studies. The 2-neutron halo nuclei can have both...
We discuss "the modelling of nuclear physics" in the framework of in-medium modified chiral soliton model. We discuss the hadron structure changes in nuclear matter, Equations of State of symmetric and asymmetric nuclear matter, properties of neutron stars and finite nuclei properties at same footing, starting from the same Lagrangian.
GW170817/SSS17a was an event of the century that opened a new window to multi-messenger astronomy and nuclear astrophysics. Optical and near-infrared emissions among many other observables suggest that their total energy release is consistent with radiative decays of r-process nuclei predicted theoretically although no specific r-process element was identified. Core-collapse supernovae (both...
End state of evolution of isolated and binary massive stars/black holes including various observational astrophysical properties of magnetized neutron stars and black holes are discussed. The energetics of rotating black holes and neutron stars is also analyzed. The possibilities of probing black holes nature through the study of their optical properties areexplored in detail.
Study the...
It is discussed the experimental results and their comparison with multi-source thermal model calculations by fragmentation of isotope $^{10}$C to much lighter nuclear such as $^8$Be, $^4$He and etc. Conclusions obtained basing on investigation and angle distribution analysis fragments relative direction projectile particles and also spectrum of distribution on transverse momentum of fragments...
The equations for the QED effective action derived in [3] are considered using
singular perturbation theory. The effective action is divided into regular and singular
(in coupling constant) parts. It is shown that expression for the regular part coincides
with usual Feynman perturbation series over coupling constant, while the remainder
has essential singularity at the vanishing coupling...
Nuclear astrophysics is going to play a pivotal role in understanding the evolution of our Universe. In the multimessenger era, the need of completing the cosmological framework of the standard Big Bang Nucleosynthesis is surely one of the most hot topics. For such a reason, recent studies have been focused on the deep comprehension of some unsolved issues such as the so-called...
