XVIII International Conference on Hadron Spectroscopy and Structure (HADRON2019)

Experimental study of double hypernuclei at J-PARC

21 Aug 2019, 10:45

25m

Duxiu Room (Guilin Bravo Hotel, Guilin, China)

Leading parallel Session 7: Hadrons in hot and nuclear environment including hypernuclei Session 7: Hadrons in hot and nuclear environment including hypernuclei

Speaker

Dr Junya Yoshida (Japan Atomic Energy Agency, for the J-PARC E07 Collaboration)

Description

Double Λ hypernuclei and Ξ hypernuclei, collectively called “double hypernuclei”, have come to play important roles in hadron nuclear physics as valuable information sources of baryon-baryon interaction. The most effective method to investigate them is event-by-event analysis with photographic emulsion sheets. An emulsion experiment to detect double hypernuclei has been performed in the J-PARC hadron facility in 2016-17. By this experiment, quantitative data on ΛΛ or Ξ*N* interaction in a nucleus are being accumulated successfully. A new nuclide of double hypernucleus, _ΛΛBe, was observed in this experiment. This event was interpreted as the production and decay of ¹⁰_ΛΛBe, ¹¹_ΛΛBe, or ¹²_ΛΛBe* via Ξ^- capture in Oxygen-16. Several other interesting events have been found and further event search is going on.

Presentation materials

Slides

20190821_doublehyper_jyoshida.pdf