1 / 18

Neutrinoless Double Beta Decay

Neutrinoless Double Beta Decay. Eung Jin Chun Korea Institute for Advanced Study APS neutrino study: physics/0411216 hep-ph/0412300 Bilenky, et.al., hep-ph/0402250. Key questions by theorists APS neutrino study: physics/0411216.

newton
Télécharger la présentation

Neutrinoless Double Beta Decay

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Neutrinoless Double Beta Decay Eung Jin Chun Korea Institute for Advanced Study APS neutrino study: physics/0411216 hep-ph/0412300 Bilenky, et.al., hep-ph/0402250 Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  2. Key questions by theoristsAPS neutrino study: physics/0411216 • Are neutrinos their own anti-particles? • What is the pattern of neutrino masses? • Is there CP violation in the leptonic sector? -- Possibly the origin of the matter-antimatter asymmetry of the universe? • Are there additional neutrino species as may be hinted by the LSND experiment? Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  3. Majorana( = c) or Dirac(c)?L  0 or L= 0 • Neutrinoless double beta decay (0) • Beta decay n p n p e- e-  m     e- e- n p p n Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  4. Neutrino mass patterns • m = 0.1-0.5 eV : Quasi-Degenerate cosmological mass–200 kg of isotope • m = 0.02-0.05 eV : Inverted-Hierarchy or QD with Normal-Hierarchy atmospheric neutrino mass–1 ton • m = 2-5 meV : QD, IH, NH solar neutrino mass–100 tons Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  5. Tritium beta decay me < 2.2 eV at Mainz & Troitsk Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  6. Cosmolgy • Neutrino dark matter (hot) h2 = i mi/92.5 eV • Power spectrum of small scale structure dFS (Gpc) » 1/m (eV) * current bound : i mi < 0.2-0.6 eV * future sensitivity : 0.14 eV (Planck) Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  7. ( Astrophysics )physics/0411216 • Detection of the GZK neutrinos (E > 1015 eV), produced from the interactions of UHECR protons with CMBR • $10 million to enhance radio-based technologies or develop new technologies reaching 10 x sensitivity. Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  8. ( An astrophysical neutrino flux model ) Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  9. l = I Uli eii/2i l = e, ,  and i = 1, 2, 3 three angles: ij; three phases: 1,2, ; three masses: mi Neutrino mases and mixing Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  10. 0 &  decay and oscillations APS 0 study : hep-ph/0412300 • P(l -> k) = sin22 sin2[1.27m2ij(eV2)L(km)/E(GeV)] •  decay : me = [ i |Uei|2mi2]1/2 • 0nbb decay : m = |i Uei2 mi eii | Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  11. Oscillation parametersSK,K2K,SNO,KamLAND,CHOOZ +0.6 •  m221 = 8.2 £ 10-5 eV2 12 = 32.3o • | m232| = 2.0 £ 10-3 eV2 sin2223 > 0.94 • sin2213 < 0.11 -0.5 +2.7 -2.4 +0.6 -0.4 NH: m232 > 0 (m3 > m2 > m1) IH: m232 < 0 (m2 > m1 > m3) QD: m0¼ m3,2,1 Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  12. Ranges of m • NH: m = |[ m2S]1/2 s122 c232 +[ m2A ]1/2 s132 e-i2| • IH: m = [ m2A]1/2 c132 £[1-4s122c122 sin2(2-1)/2]1/2 • QD: m=m0 |(c122ei1+s122ei2)c132 +s132| Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  13. Ranges of m Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  14. 0 and nuclear structure • Decay rate of (A, Z) -> (A, Z+2) e+ e+ : 1/T01/2(A,Z) = G0(E0,Z) | M0GT– (gV2/gA2) M0F |2 m2 • Heidelberg-Moscow 76Ge experiment : T01/2 > 1.9 1025 yrs !m < 0.55 eV Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  15. Nuclear structure issues • Quasiparticle Random Phase Approximation (10%?) • Shell Model • Constraining with other observables • Reducing the uncertainty (factor 2-3 presently) : Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  16. Future prospectsBilenky et.al., hep-ph/0402250 Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  17. (note) Beta decay : me < 0.2 eV at KATRIN Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

  18. Conclusionshep-ph/0412300 Workshop for Underground Experiment and Astroparticle Physics, Muju, 2005. 2. 16-19

More Related