Speaker
Description
With the large datasets of $𝑒^+𝑒^−$ annihilation at the 𝐽/𝜓 and 𝜓(3686) resonances collected by the BESIII experiment, multi-dimensional analyses making use of polarisation and entanglement can shed new light on the production and decay properties of hyperon-antihyperon pairs. In a series of recent studies performed at BESIII, significant transverse polarisation of the (anti)hyperons has been observed in 𝐽/𝜓 or 𝜓(3686) decays to $Λ\bar{Σ}$ , $Σ\bar{Σ}$ , $Ξ\bar{Ξ}$. The decay parameters for the most common hadronic weak decay modes were measured, and due to the non-zero polarization, the parameters of hyperon and antihyperon decays could be determined independently of each other for the first time. Comparing the hyperon and antihyperon decay parameters yields precise tests of direct, $Δ𝑆 = 1$ CP-violation that complement studies performed in the kaon sector.
| Alternate track | 06. Strong Interactions and Hadron Physics |
|---|---|
| I read the instructions above | Yes |
