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This work is devoted to the study of charmonium S-states by solving the Schrödinger equation with Cornell plus spin–spin interaction term via the artificial neural network (ANN) approach. From the solutions provided by ANN approach, we propose possible assignments for some of the recently discovered charmonium-like resonances. For simplicity purpose, we restricted the study to the ground and radially excited S-states of charmonium. The charmonium wave function is represented by the feed forward ANN and its inputs are assimilated to coordinate values. We calculated the masses, hyperfine splittings, spin-averaged mass spectrum and Regge trajectories of pseudoscalar and vector charmonium states. Overall, our results are in good accordance with the available experimental data and past studies of the mass spectrum of J PC = 1 − − and J PC = 0 − + charmonium states. Further, we propose a possible assignment for some of the recently discovered charmonium-like mesons. We concluded that η c (3 S) , η c (4 S) , ψ (4 S) , η c (5 S) and ψ (6 S) are, respectively, good candidates of X (3 9 4 0) , X (4 1 6 0) , Y (4 2 6 0) , ψ (4 4 1 5) and Y (4 6 6 0) charmonium-like resonances. [ABSTRACT FROM AUTHOR]

This study focuses on baryons that consists of one heavy quark and two light quarks. This paper explores the mass spectra of radial and excited states for all singly heavy baryons, employing the Hypercentral Constituent Quark Model (hCQM). In this model, we incorporated higher-order corrections, including second-order corrections in mass, specifically considering spin-dependent terms. This methodology enables a more accurate observation of the correct spin splitting order. We have determined important properties, including magnetic moment, transition magnetic moment, radiative decay width and strong decay width. [ABSTRACT FROM AUTHOR]

We have systematically studied the level density parameter, nuclear level density and decay width of neutron and fission of superheavy nuclei. This paper is validated by comparing with available experiments for 2 3 6 U and 2 4 0 Pu. The angular dependence of level density parameter, level densities and ratio of Γ n and Γ f the thermal excitation energy (U) have been studied in the superheavy region 1 0 4 ≤ Z ≤ 1 1 8. The role of entrance channel parameter on decay width of neutron and fission has been studied both in cold and hot fusion reactions in the superheavy region 1 0 4 ≤ Z ≤ 1 1 8. Systematic variation of Γ n and Γ f is observed in both the cases. Finally, predicted Γ n / Γ tot for the synthesis of superheavy nuclei Z = 1 1 9 and 120. [ABSTRACT FROM AUTHOR]

We have studied all possible argon- and krypton-induced fusion reactions to synthesize superheavy nuclei in the atomic number range 100 ≤ Z ≤ 126. The effects such as extra push and extra-extra push in the fusion of two nuclei are included in the present work. The theoretical formalism used in the present work is validated by comparing with the available experiments. Kr-induced fusion reactions produces production cross sections of the order of nanobarns (nb), whereas Ar-induced fusion reactions produces evaporation residue cross sections of the order of picobarns (pb). This may be due to the fact that 86Kr is an almost spherical and magic nucleus. We have selected the almost spherical projectile and target combinations such as 84Kr + 207Bi, 84Kr + 208Bi, 84Kr + 209Bi, 86Kr + 207Bi, 86Kr + 208Bi, 86Kr + 209Bi, 86Kr + 208Po and 86Kr + 209Po to synthesize the superheavy elements Z = 119, 120, 124 and 126. The suggested projectile–target combinations are useful to synthesize the superheavy nuclei and hence extends the periodic table. [ABSTRACT FROM AUTHOR]

Two-proton (2p) radioactivity provides fundamental knowledge on the three-body decay mechanism and the residual nuclear interaction. In this work, we propose decay width formulae in the extended R-matrix framework for different decay mechanisms, including sequential 2p decay, diproton decay, tri-body decay, and sequential two-diproton decay. The diproton and tri-body formulae, combined with information on the two-nucleon transfer amplitude and Wigner single-particle reduced width, can reproduce well experimental 2p radioactivity half-lives. For the case of 67Kr, theoretical predictions for direct 2p decay give much larger half-lives than the recent measurement from RIKEN. A combination of direct and sequential 2p emission is analyzed by considering a small negative one-proton separation energy and a possible enhanced contribution from the p-wave component. The present method predicts that 71Sr and 74Zr may be the most promising candidates for future study on 2p radioactivity. Our model gives an upper limit of 55(4) keV for the decay width of 4p emission in recently found four-proton resonant nuclide, 18Mg, which agrees with the observed width of 115(100) keV.

In this paper, we investigate the charged Higgs boson decay in the context of the type-II two-Higgs-doublet model in the presence of a circularly polarized electromagnetic field of laser radiation. The calculations are performed by adopting the Furry picture approach of non-perturbative interactions with the external electromagnetic field. Using the method of exact solutions for charged particles states in the presence of a circularly polarized electromagnetic wave field and evaluating the S-matrix elements, an exact analytic expression is derived for the decay width of leptonic, hadronic and bosonic decay modes. The branching ratios of different decay modes with multiple photon emission and absorption from the laser beam are analyzed and found to be dramatically modified in the region of superstrong fields. The dependencies of the decay width on the laser field strength and frequency are also examined. The results obtained may be interesting for future experimental and theoretical investigations.

Within the framework of the Minimal Supersymmetric Standard Model, the decay of a polarized chargino (neutralino) into a polarized neutralino and a gauge boson in reactions χ ˜ i ∓ → χ ˜ j ∓ + W ∓ and χ ˜ i 0 → χ ˜ j 0 + Z are considered. Analytical expressions for the decay widths have been obtained with allowance for the chargino and neutralino polarized states. The neutralino longitudinal and transverse polarization degrees have been determined together with the asymmetry caused by initial chargino (neutralino) polarization. The dependence of these characteristics and the decay width on the chargino (neutralino) mass has been studied. [ABSTRACT FROM AUTHOR]

In this paper, we enumerated ground and excited state masses of singly heavy bottom-strange baryons using the hypercentral constituent quark model (hCQM). The screening potential is used with color-Coulomb potential, as the confining potential. We determine the possible J P values to recently observed excited states like, Ξ b (6 1 0 0) , Ξ b (6 2 2 7) , Ξ b (6 3 2 7) , Ξ b (6 3 3 3) and four Ω b (6 3 1 6 , 6 3 3 0 , 6 3 4 0 , 6 3 5 0) states. The Regge trajectories are plotted in (J , M 2) plane to assign the J P values and quantum numbers to recently observed states. Using the calculated spectroscopic data, properties such as magnetic moment, transition magnetic moment, radiative decay width, and strong decay width are also investigated for all singly heavy bottom-strange baryonic system. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Shanghai University / Shanghai Daxue Xuebao is the property of Journal of Shanghai University (Natural Sciences) Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Within the framework of the Standard Model, the channel of the Higgs boson radiative decay into a fermion-antifermion pair H ⇒ f fγ ¯ is investigated. Taking into account the fermion and W-boson loop diagrams, an analytical expression for the decay width is obtained, and the circular γ-quantum polarization is studied depending on the angle θ and the invariant mass of the fermion pair. [ABSTRACT FROM AUTHOR]

Copyright of Momento: Revista de Física is the property of Universidad Nacional de Colombia, Departamento de Fisica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The new lower tungsten divertor of EAST uses a right-angle shape consisted by horizontal and vertical targets, which has the capacity of increasing the divertor closure. The strike point (SP) sweeping experiment is carried out to (1) avoid long-term deposition of particle and heat flux at the same location, thus protecting the target, (2) study the dependence of power control capability on the SP location. The particle and energy flux densities to the target depends strongly on their decay width. Therefore, it is important to know how the SP location influences the outer target (OT) particle parallel λ _js _,OT and OT parallel heat flux decay widths λ _q _,OT . In this work, SOLPS-ITER simulations combined with SP sweeping experiment are applied to study this issue. Four cases, which are taken from different time during SP sweeping (including both horizontal and vertical divertor) in L-mode experiment with high heating power, are selected for investigation. The simulation result is in satisfactory agreement with experiment data, suggesting the simulation is valid. The results indicate that the SP location can affect neutral particles accumulation and ionization positions, thus affecting λ _js _,OT and λ _q _,OT . (1) When SP is located in horizontal target, the higher neutral particle ionization in common flux region leads to wider λ _js _,OT than those of vertical target. (2) When SP is located on horizontal target, the divertor power radiation is higher than that of vertical target, resulting in wider λ _q _,OT . (3) Increasing upstream plasma density can effectively broaden λ _q _,OT , while λ _js _,OT remains almost unchanged. This study improves the understanding of the influence of divertor shape on λ _js _,OT and λ _q _,OT , and can be applied to heat flux control during long-pulse high-power discharges on EAST.

Within the framework of the standard model (SM), the decay of the Higgs boson into a quark-antiquark pair with gluon emission is studied. An analytical expression is obtained for the decay width, and a dependence of the decay width on the quark and antiquark energies is studied. By integrating over the quark and antiquark energies, the full width of the Higgs boson decay Н → q q ¯ g is determined. [ABSTRACT FROM AUTHOR]

The process of radiative decay of a Higgs boson into a fermion-antifermion pair H ⇒ ff ¯ γ. is investigated within the framework of the Standard Model. Taking into account the helicity of fermions and the circular polarization of a γ-quantum, an analytical expression for the decay width has been obtained. Circular polarization of the γ-quantum is examined in detail as a function of the angle θ and the invariant mass x of the fermion pair. [ABSTRACT FROM AUTHOR]

Within the framework of the Minimal Supersymmetrtic Standard Model, we have investigated the decay channels of Higgs bosons into a photon and a gauge boson: H(h; A) ⇒ γ Z , H± ⇒ γ W±. Analytical expressions have been obtained for the widths of the indicated decays, and their dependence on the mass of the Higgs boson has been investigated. [ABSTRACT FROM AUTHOR]

Masses and decay width for some heavy baryons are studied within Isgur–Wise formalism. The extended Cornell potential is employed. The hyper-radial Schrödinger equation with extended Cornell potential is solved to obtain eigenvalues of energy and baryonic wave function by using the extended iteration method. Masses and the rate of decay width for some heavy baryons are calculated. The present results are improved in comparison with other recent works and are in a good agreement with experimental data. [ABSTRACT FROM AUTHOR]

Within the framework of the Minimal Supersymmetric Standard Model, we have investigated decay channels of Higgs bosons into circularly polarized photons (gluons): H(h; A) → γγ(gg). Analytical expressions have been obtained for the probabilities of the corresponding decays, and their dependence on the Higgs boson masses has been investigated. [ABSTRACT FROM AUTHOR]

We work on equations of state for hot QCD obtained from a hard thermal loop expression for the gluon self-energy, by employing the quasi-parton equilibrium distribution functions. The method involves mapping the interaction part of the equation of state to an effective fugacity of otherwise non-interacting quasi-gluons. Using the quasi-gluon distribution function, we have studied the dissociation of heavy Quarkonium in hot QCD medium by investigating the medium modification to a heavy quark potential. Employing the in-medium (corrected) potential while considering the anisotropy (both oblate and prolate cases) in the medium, the thermal widths and the binding energies of the heavy quarkonia states (s-wave charmonia and s-wave bottomonia specifically, for radial quantum numbers n=1 and 2) have been determined. In the present article, we shall consider an anisotropic QGP medium which is described in terms of quasi-particle degree of freedom based on a recent proposed quasi-particle model for hot QCD equation of state. The presence of anisotropy makes the real-part of the potential stronger but the imaginary-part is weakened slightly. However, since the medium corrections to the imaginary-part is a small perturbation to the vacuum part, overall the anisotropy makes the dissociation temperatures higher, compared to isotropic medium. [ABSTRACT FROM AUTHOR]

We perform the flavour S U (3) analysis of the recently discovered Ω (2012) hyperon. We find that well known (four star) Δ (1700) resonance with quantum numbers of J P = 3 / 2 − is a good candidate for the decuplet partner of Ω (2012) if the branching for the three-body decays of the latter is not too large ≤70%. That implies that the quantum numbers of Ω (2012) are I (J P) = 0 (3 / 2 −). The predictions for the properties of still missing Σ and Ξ decuplet members are made. We also discuss the implications of the K ‾ Ξ (1530) molecular picture of Ω (2012). In the molecular picture, Ω (2012) state can have quantum numbers of either I (J P) = 0 (3 / 2 −) or I (J P) = 1 (3 / 2 −). Crucial experimental tests to distinguish various pictures of Ω (2012) are suggested. [ABSTRACT FROM AUTHOR]

Within the framework of the Minimal Supersymmetric Standard Model, decay channels of Higgs bosons (h, A), H± into arbitrarily polarized fermion-antifermion pairs HhA→ff¯,H+→ff¯′ have been investigated. Analytical expressions for the probabilities of the corresponding decays are obtained and their dependence on the mass of the Higgs bosons is investigated. [ABSTRACT FROM AUTHOR]

Abstract In this paper, the baryonic wave function has been obtained with the Cornell potential, a combination of linear and Coulomb terms, using the hyper-radial Schrödinger equation and an improved variational method while on the other hand, hyperfine interactions are considered, including smeared standard hyperfine term, isospin dependent and spin–isospin dependent terms in order to improve the results. Then, the baryonic Isgur–Wise function in hyperspherical coordinates has been investigated employing both mentioned wave functions. Finally, in particular, the charged radius and the decay width of transition have been reported for both methods and compared with those obtained in experiments or theories. [ABSTRACT FROM AUTHOR]

Light flavour baryons are studied in a non-relativistic potential model with colour Coulomb plus linear confinement potential using a simple variational method. The ground-state masses and magnetic moments of the light baryons are computed using a spin- and isospin-dependent potential. We extend our scheme to predict the transition magnetic moments of B(JP=3/2+)→B(JP=1/2+)γ processes. We also compute the radiative decay widths and branching ratios of light baryons. A comparison of our results with those of other works and experimental data is also presented. [ABSTRACT FROM AUTHOR]