Search for B mesogenesis at BABAR

Lees, JP, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, DN, Kolomensky, Yu G, Fritsch, M, Koch, H
et al (show 210 more authors) (2023) Search for B mesogenesis at BABAR. Physical Review D, 107 (9). 092001-.

[thumbnail of PhysRevD.107.092001.pdf] PDF
PhysRevD.107.092001.pdf - Open Access published version

Download (4MB) | Preview


A new mechanism has been proposed to simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the Universe. This scenario predicts exotic B-meson decays into a baryon and a dark-sector antibaryon (ψD) with branching fractions accessible at B factories. We present a search for B→ΛψD decays using data collected by the BABAR experiment at SLAC. This reaction is identified by fully reconstructing the accompanying B meson and requiring the presence of a single Λ baryon in the remaining particles. No significant signal is observed, and bounds on the B→ΛψD branching fraction are derived in the range 0.13-5.2×10-5 for 1.0<mψD<4.2 GeV/c2. These results set strong constraints on the parameter space allowed by the theory.

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 10 Jul 2023 14:43
Last Modified: 15 Mar 2024 21:22
DOI: 10.1103/physrevd.107.092001
Related URLs: