Work

Constraints on the mass of the dark antibaryon using Bd → ΛψDS channel in light cone QCD

Year: 2026

Type: article

Abstract: According to the B -mesogenesis framework, the baryon asymmetry of the Universe and dark matter can be simultaneously generated through CP-violating B -meson oscillations. In this mechanism, B -mesons decay into a Standard Model baryon and a dark-sector antibaryon, denoted by ψ DS . Within this scenario, we investigate the allowed mass window for ψ DS using Light Cone Sum Rules (LCSR) for B d → Λ ψ DS decay. To include nonperturbative effects, we employ contributions up to twist-6 of the Λ distribution amplitudes in the operator product expansion (OPE). We derive the branching fraction as a function of dark antibaryon mass and, by comparing with the experimental limits by the BaBar and Belle collaborations, determine the mass ranges of ψ DS consistent with the B -mesogenesis mechanism.

Source: Nuclear Physics B

DOI: 10.1016/j.nuclphysb.2026.117670

Authors: M.A. Abri, N. Hajirasouliha, K. Azizi

Institutions: University of Tehran, Doğuş University

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Science Foundation, Iran National Science Foundation

Award: G3455535985