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      【4.18】Threshold enhancement in ppbar invariant mass spectrum
      2019-04-15|文章来源: |【
       

        Experimental Physics Division (EPD) seminar

          Title: Threshold enhancement in ppbar invariant mass spectrum

        Speaker: Dr. Xianwei Kang(康现伟), Beijing Normal university

        Chair: Dr. Yanping Huang (黄燕萍), IHEP

        Time: 10:00, Thursday , 18th, April, 2019

        Location: B326, main building

        Indico: https://indico.ihep.ac.cn/event/9949/

        Abstract:

        The huge peak around the proton-antiproton (ppbar) mass threshold was observed in the J/psi radiative decay from BESII, and confirmed by BESIII. The nature about that is still challenging and various interpretations have been proposed. We have seriously and quantitatively considered the final state interaction (FSI) between ppbar in several decay modes observed in BES collaboration.It turns out that the FSI must not be a neglectable ingredient, and the prominent peak mentioned in J/psi radiative decay would be interpreted as a bound state.

        In this talk, we will introduce how we construct the chiral potential to treat nucleon-antinucleon scattering, and the resulting FSI. We have also applied our such method to the process of e+e- -> multipions, where the observed clear dip structure in experiment is also described.

        About the speaker:

        Dr. Xianwei Kang (康现伟)

        2017, Vistor in Academia Sinica, Taiwan

        2014 – 2017, Post-doc in Juelich research center, Germany and Murcia university , Spain

        2014, Ph.D in Physics, Bonn university, Germany

        2008, Bachelor in Physics, Henan Normal university

        More detailed CV can be found in indico page https://indico.ihep.ac.cn/event/9949/

       


       
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