Speaker
Description
In heavy-ion collisions, two-particle femtoscopy is a powerful and unique method for extracting information about the spatio-temporal properties of the source, characterizing final-state interactions (FSI), and searching for possible bound states. Measurements of hyperon-nucleon ($YN$) and hyperon-hyperon ($YY$) correlations can reveal the existence of strange dibaryons, which consist of six quarks, with at least one strange quark. Additionally, measurements of correlations between light nuclei (d, t, $^{3}$He) and $\Lambda$ hyperons can provide insights into the internal structure and binding energy of hypernuclei, as well as the many-body interactions between hyperons and nucleons. These interactions are important for understanding the equation of state and the internal structure of neutron stars.
In this talk, we will present the measurements of baryon-baryon correlation functions, including $p$-$\Xi^{-}$, $\Lambda$-$\Lambda$, and $p$-$\Omega^{-}$ pairs, in isobar collisions (Ru+Ru, Zr+Zr) at $\sqrt{s_\mathrm{NN}}$ = 200 GeV. Additionally, we will present the measurement of $d-\Lambda$, $t-\Lambda$, and $^{3}$He-$\Lambda$ correlations from high-statistics data of $\sqrt{s_\mathrm{NN}}$ = 3 GeV Au+Au collisions. These correlation functions are analyzed within the Lednicky-Lyuboshitz formalism. The extracted scattering lengths and effective ranges will be presented, and these parameters will be compared with effective theory model calculations. Most importantly, the physics implications for possible bound states and binding energies will be discussed.
| 请选择分会 | 高能重离子物理 |
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