Search for dark sector at BESIII

9 Jun 2026, 17:45
20m
Scuola Normale Superiore, Aula Dini, Palazzo del Castelletto (Pisa)

Scuola Normale Superiore, Aula Dini, Palazzo del Castelletto

Pisa

Via del Castelletto, 11, 56126 Pisa PI
BSM

Speaker

Xiaoshuai Qin (Shandong University)

Description

The BESIII experiment is taking dat at a symmetric e+e- collider operating at c.m. energy from 2.0 to 4.95 GeV. With the world’s largest threshold production data set of J/ψ (10 billion), ψ(3686) (2.6 billion), and 20 $fb^{-1}$ of D meson pairs from ψ(3770) decay, we are able to search for various dark sectors produced in e+e- annihilation and meson decay processes. In this talk, we report the search for $K_S^0$ invisible decay, search for the massless dark photon with charm FCNC process $D^0→ωγ’$ and $D^0→γγ’$, search for the dark baryon decay in $Ξ^-→π^-$ + invisible, search for J/ψ→Φ + invisible, and search for X(17) with $ψ(3686)→X(17)χ_c^0$ and $ψ(3686)→γχ_c^0->γX(17)J/ψ$.

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Author

Xiaoshuai Qin (Shandong University)

Co-author

Fabrizio Umberto Bianchi (INFN - Torino)

Presentation materials