We inadvertently wrote an earlier version of this post suppressing the "ϕ". Would have been nice.
Test of lepton flavour universality with Bₛ⁰→ϕℓ⁺ℓ⁻ decays arxiv.org/abs/2410.13748 - Branching fraction ratios between the Bₛ⁰→ϕe⁺e⁻ and Bₛ⁰→ϕμ⁺μ⁻ decays are measured in three regions of dilepton mass squared and agree with the Standard Model expectation of lepton flavour universality.
Measurement of the effective leptonic weak mixing angle arxiv.org/abs/2410.02502 - The measured effective leptonic weak mixing angle is 0.23147±0.00044±0.00005±0.00023, where the first uncertainty is statistical, the systematic, and the third from the fit model.
Search for B*⁰₍ₛ₎→μ⁺μ⁻ in B⁺c→π⁺μ⁺μ⁻ decays arxiv.org/abs/2409.17209 - Upper limits at the 90% confidence level are set on the branching fractions of B*⁰→μ⁺μ⁻ and B*⁰ₛ→μ⁺μ⁻ relative to that for B⁺c→J/ψπ⁺ decays at 3.8×10⁻⁵ and 5.0×10⁻⁵, respectively.
Analysis of Λb⁰ → pK⁻μ⁺μ⁻ decays arxiv.org/abs/2409.12629 - The angular coefficients show a pattern of vector-axial vector interference that is a characteristic of the type of flavour-changing neutral-current transition relevant for these decays.
First determination of the spin-parity of Ξc(3055) baryons arxiv.org/abs/2409.05440 - The spin-parity of the Ξc(3055)⁺ (Ξc(3055)⁰) baryons is determined to be 3/2+ with a significance of more than 6.5σ (3.5σ) compared to all other tested hypotheses.
Measurement of CP violation in B⁰→D⁺D⁻ and Bₛ⁰→Dₛ⁺Dₛ⁻ decays arxiv.org/abs/2409.03009 - These results represent the most precise single measurement of the CP-violation parameters in their respective channels.
Measurement of exclusive J/ψ and ψ(2S) production at √s=13 TeV arxiv.org/abs/2409.03496 - The dependence of the J/ψ and ψ(2S) cross-sections on the total transverse momentum transfer is determined in pp collisions and is consistent with that in electron-proton collisions.
Measurement of Λb⁰, Λc⁺ and Λ decay parameters using Λb⁰→Λc⁺h⁻ decays arxiv.org/abs/2409.02759 - The most precise measurements of the decay parameters α,β and γ are obtained for Λc⁺ decays and an independent measurement of the decay parameters for the strange-baryon Λ decay is provided.
