Observation of B_c⁺ → D h⁺ h^- decays

2025/09/19 by R. Aaij, LHCb collaboration, Aaij, R. +2372 · 1 voice · 1 citation
#hep-ex

paper · pdf · doi:10.48550/arxiv.2509.15873

Abstract

Searches are presented for B_c⁺ → D h⁺ h^- decays, where D is a charmed meson and h^± is a charged pion or kaon, using pp collision data collected by the LHCb experiment corresponding to an integrated luminosity of 9~fb^-1. The decays B_c⁺→ D⁺ K⁺π^-, B_c⁺→ D^*+ K⁺π^- and B_c⁺→ D_s⁺ K⁺ K^- are observed for the first time. Their branching fractions, expressed as ratios relative to that of the B_c⁺→ B_s⁰π⁺ decay, are determined to be R(B_c⁺→ D⁺ K⁺π^-) =(1.96 ± 0.23± 0.08 ± 0.10)× 10^-3,
R(B_c⁺→ D^*+ K⁺π^-) =(3.67 ± 0.55 ± 0.24± 0.20)× 10^-3,
R(B_c⁺→ D_s⁺ K⁺ K^-) =(1.61 ± 0.35± 0.13± 0.07)× 10^-3, where the first uncertainty is statistical, the second is systematic, and the third is due to the limited precision on the D-meson branching fractions. The decay channels proceed primarily through excited K⁰ or D⁰ resonances or φ mesons, and open a new avenue for studies of charge-parity violation in beauty mesons.

Cited by

• New measurements of B⁺_c decays into single charm final states

Discussions

• Observation of Bc⁺→D⁺h⁺h⁻decays arxiv.org/abs/2509.15873 - The decays Bc⁺→D⁺K⁺π⁻, Bc⁺→D*⁺K⁺π⁻ and Bc⁺→Dₛ⁺K⁺K⁻ are observed for the first time. [bsky, 5 points, 0 comments]

Related

• Search for C P violation in D⁺ → ϕπ⁺ decays
• Study of B_c⁺ → χ_c π⁺ decays
• Observation of the B_c⁺ → J/ψπ⁺ π⁰ decay
• Observation of CP violation in charm decays at LHCb
• Measurement of B -> D_s K pi branching ratios