Relativistic effects in M1 radiative decays of heavy-light mesons

2025/07/29 by Bondar, A. E., Milstein, A. I.
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2507.21466

Abstract

We discuss the M1 radiative transitions D^*→ Dγ, D_s^*→ D_sγ, B^*→ Bγ, and B^*_s→ B_sγ. A relativistic potential model is proposed. The corresponding Hamiltonian, when expanded to terms of the order of v²/c², where v are the quark velocities, coincides with the Breit Hamiltonian. This model allows making predictions for the widths of radiative transitions of mesons with one light quark. Taking into account relativistic effects is especially important for the transitions D_s^*+→ D_s⁺γ and D^*+→ D⁺γ, where there is a large compensation in the magnitude of the magnetic moment of these mesons. Our results are consistent with known experimental data.

Citations

• Relativistic effects in the strong and electromagnetic decays of D^* meson
• QCD calculations of radiative heavy meson decays with subleading power corrections
• Excited bottom and bottom-strange mesons in the quark model

Related

• Systematic study of light and charm meson M1 radiative transitions
• Phenomenology of D_s1 mesons radiative transitions
• Radiative decays of 1⁺⁺ heavy mesons in the covariant light-front approach
• Large Relativistic Corrections to Nonrelativistic M1 Transitions in Heavy Quarkonium
• Relativistic effects in the strong and electromagnetic decays of D^* meson