Unknowns of Neutrinos u Neutrino oscillation u u
- Slides: 7
Unknowns of Neutrinos u Neutrino oscillation： ð ð u u u 2020/9/25 Neutrino mass hierarchy Θ 23 Octant CP phase Unitarity of neutrino mixing matrix ü For exotics and sterile neutrinos Neutrino mass Dirac or Majorana ? Sterile neutrinos ? Magnetic moments ? Relic neutrinos Searches, … 1
Unknowns of Neutrinos u Neutrino oscillation： ð ð u u u 2020/9/25 Neutrino mass hierarchy Θ 23 Octant CP phase Unitarity of neutrino mixing matrix ü For exotics and sterile neutrinos Neutrino mass Dirac or Majorana ? Sterile neutrinos ? Magnetic moments ? Relic neutrinos Searches, … 2
Unknowns of Neutrinos u Neutrino oscillation： ð ð u u u 2020/9/25 Neutrino mass hierarchy Θ 23 Octant CP phase Unitarity of neutrino mixing matrix ü For exotics and sterile neutrinos Neutrino mass Dirac or Majorana ? Sterile neutrinos ? Magnetic moments ? Relic neutrinos Searches… JUNO can do some JUNO-bb JUNO-near 3
JUNO-Near u A ~1 m 3 Liquid Xe TPC placed at ~ 20 m from a reactor core ð Precision measurement of reactor neutrino energy spectrum with a resolution ~ 1%@1 Me. V ð Neutrino magnetic moment ü u u u 2020/9/25 Background ? R&D on going to have a conceptual design Try to get funding, man power, technologies, … Welcome collaborators 4
JUNO-bb u u u JUNO is a great detector with an extremely good energy resolution. What can be done next ? A Kam. LAND-Zen and SNO+ type of detector for bb decays ? Can sensitivity improve with the increase of mass ? Is the shallow depth of JUNO a problem ? What is the ultimate sensitivity ? Zhao et al. , ar. Xiv: 1610. 07143, submitted to CPC 2020/9/25 5
A First Look u u u Take the Kam. LAND-Zen type of approach as an example: insert a balloon filled with 136 Xe-loaded LS (other isotopes? ) into JUNO Cosmic-induced backgrounds are removed by cutting a volume around the muon track Yes, sensitivity scales with the mass Isotopes Mass(t) <mbb>, me. V n. EXO 136 Xe 5 7 -22 GERDA 76 Ge 1 10 -40 Majorana 76 Ge 1 10 -40 SNO+ 130 Te 8 19 -46 Kam. LAND -Zen 136 Xe 1 ~20 JUNO-bb 136 Xe 50 4 -12 Zhao et al. , ar. Xiv: 1610. 07143, accepted by CPC Muon tracking is important ! 6
Future u u New ideas New technologies Global coordination Global collaboration: Huge detectors at scale of B $ ? ð Neutrino mass ð bb decays ð Magnetic moments ? 7
