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SUMMARY:[NAPP Seminar] The hunt for double-beta decay and nEXO
DTSTART;VALUE=DATE-TIME:20170119T050000Z
DTEND;VALUE=DATE-TIME:20170119T070000Z
DTSTAMP;VALUE=DATE-TIME:20261114T115843Z
UID:indico-event-25@sshep.snu.ac.kr
DESCRIPTION:* Speaker : Prof. Giorgio Gratta (Stanford University)\n\n* Ab
 stract :\n\nNeutrinos\, the only neutral elementary fermions\, have provid
 ed us with many surprises. Flavor oscillations reveal the non-conservation
  of the lepton flavor number and demonstrate that\, although neutrino mass
 es are finite\; yet they are surprisingly smaller than those of other ferm
 ions (by at least six orders of magnitude!) . It is then natural to ask if
  the mechanism providing the mass to neutrinos is the same that gives mass
 es to the other (charged) elementary particles and if neutrinos are descri
 bed by 4-component Dirac wavefunctions or\, as possible for neutral partic
 les\, by 2-component Majorana ones.   \n\nThe hypothetical phenomenon o
 f neutrino-less double-beta decay can probe the Majorana nature of neutrin
 os and the conservation of the overall lepton number. It may also help elu
 cidating the origins of mass in the neutrino sector.\n\nFollowing the well
 -known principle that there is no free lunch in life\, interesting half-li
 ves for neutrino-less double-beta decay exceed 10^25 years (or ~10^15 time
 s the age of the Universe!) making experiments rather challenging. I will 
 review the experimental situation world-wide and describe in more detail t
 he EXO program\, including the recent measurements by EXO-200 and the plan
 s for a 5-ton enriched Xe detector\, nEXO\, that will have a sensitivity t
 o Majorana masses below 10 meV.\n\nhttps://sshep.snu.ac.kr/event/25/
LOCATION:B56 521
URL:https://sshep.snu.ac.kr/event/25/
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