2025/11/07 by Jafari, Nosratollah, Guvendi, Abdullah · 1 citation
Physics and Astronomy · #Quantum Mechanics and Non-Hermitian Physics #Noncommutative and Quantum Gravity Theories #Quantum and Classical Electrodynamics
paper · doi:10.48550/arxiv.2511.05641
This study investigates a modified two-body Dirac equation in (2+1)-dimensional spacetime, inspired by Amelino-Camelia's doubly special relativity (DSR). We begin by deriving a covariant two-body Dirac equation that, in the absence of DSR modifications, reduces to a Bessel-type wave equation. Incorporating corrections from the chosen DSR model modifies this wave equation, yielding solutions consistent with established results in the low-energy regime. We demonstrate that the effects of DSR modifications become particularly pronounced at large relative distances. For a coupled fermion-antifermion pair, we derive the modified binding energy solutions. By accounting for first-order Planck-scale corrections, we show that the fine-structure constant αbehaves as an energy-dependent running parameter, given by \(αeff(E)/α≈ 1 - (E)/(4Ep)\), where Ep is the Planck energy. Binding energy levels are computed using a first-order approximation of the DSR modifications, and the results are applied to positronium-like systems. Our model reveals that DSR modifications induce shifts in the binding energy levels. To the best of our knowledge, DSR-modified two-body equations have not been previously studied. This model is the first of its kind, opening new avenues for further research in this area.