Search

The optical properties of a thin-shell wormhole (TSW) with a Hayward profile is investigated. Adopting the ray-tracing method, we demonstrate that the TSW's contralateral spacetime is capable of reflecting a significant portion of light back to the observer spacetime. We analyze the effective potential, light deflection, and azimuthal angle of the TSW and find that these quantities are affected by the mass ratio of the black holes (BHs). Specifically, if the mass of the contralateral spacetime BH is greater than that of the original spacetime BH, and the impact parameter satisfies the condition H b c2 < b 1 < b c1 , the trajectory of the photon exhibits round-trip characteristics. Assuming the presence of a thin accretion disk surrounding the observing spacetime BH, our results indicate that the image formed by the TSW exhibits additional photon rings and a lensing band compared to an image produced by a BH alone. [ABSTRACT FROM AUTHOR]

Recently, the LHCb Collaboration has confirmed the state X(4140), with a mass M = 4146.5 ± 4. 5 - 2.8 + 4.6 MeV, and a much larger width Γ = 83 ± 21 - 14 + 21 MeV than the previous experimental measurements, which has confused the understanding of its nature. We will investigate the possibility of the χ c 1 (3 P) interpretation for the X(4140), considering the mass spectra predicted in the quark model, and the strong decay properties within the 3 P 0 model. We also predict the strong decay properties of the charmonium states χ c 0 (3 P) and χ c 2 (3 P) . Our results show that the X(4140) state with the small width given in PDG can be explained as the charmonium state χ c 1 (3 P) in the 3 P 0 model, and high precision measurement of the width of the X(4140) is crucial to understand its nature. [ABSTRACT FROM AUTHOR]

The strong decays of the 51S0qq¯ states are evaluated in the 3P0 model with two types of space wave functions. Comparing the model expectations with the experimental data for the π(2360), η(2320), X(2370), and X(2500), we suggest that the π(2360), η(2320), and X(2500) can be assigned as the members of the 51S0 meson nonet, while the 51S0 assignment for the X(2370) is not favored by its width. The 51S0 kaon is predicted to have a mass of about 2418 MeV and a width of about 163 or 225 MeV. [ABSTRACT FROM AUTHOR]