CP-violation studies of baryon-antibaryon pairs with the BESIII experiment

by Prof. Patrik Adlarson

Thursday 9 Jun 2022, 15:00 → 17:00 Asia/Shanghai

ABSTRACT: The BESIII experiment at the electron positron collider BEPCII in Beijing is successfully operating since 2008 and has collected large data samples in the tau-mass region, including the world's largest data samples at the J/Psi and Psi(2S) resonances. The recent observations of hyperon polarisations at BESIII opens a new window for testing CP violation, as it allows for simultaneous production and detection of hyperon and anti-hyperon pair two body weak decays. The CP-symmetry tests can be performed in processes like e.g. J/Psi —> Lambda Lambdabar, J/Psi —> Sigma Sigmabar and J/Psi —> Xi Xibar. For the Xi —> Lambda pi decay it is possible to perform two independent CP tests and determine the strong phase and weak phase difference for the Xi —> Lambda pi decay. In this presentation an outline of the methods and recent results achieved at BESIII will be highlighted. About the speaker: Patrik Adlarson from Uppsala University, Sweden Education. M.S., Uppsala University, Sweden, 2007 Ph.D., Uppsala University, Sweden, 2012 Employment. Researcher, Uppsala University, Sweden, since 2017 Postdoctoral Researcher, Johannes Gutenberg-University, Mainz, Germany , 2014- 2017 Researcher, Uppsala University, Sweden, 2013 Research Areas: light meson decays as it relates to isospin breaking; fundamental symmetries in general, in particular CP-symmetry studies in baryon-antibaryon pairs. Zoom Link: https://ihep-ac-cn.zoom.us/j/89437363440?pwd=QXNWSXV0ZmJEMTNVc2VKcXFkM2I5Zz09 Zoon ID: 89437363440 Passwd: 254854

Slides Curriculum_Vitae_Short_Version.pdf EDP_Seminar_IHEP.pdf