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SEQUENCE:1
UID:UW-Physics-Event-5043
DTSTART:20190208T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T084827Z
LAST-MODIFIED:20190204T155315Z
LOCATION:2241 Chamberlin Hall
SUMMARY:The Quest for Neutrino Mass Ordering\, Physics Department Coll
 oquium\, Wei Wang\, Sun Yat-Sen University\, Guangzhou
DESCRIPTION:Neutrino mass is currently the only sign of new physics be
 yond the Standard Model (SM) of particle physics. Unfortunately\, due 
 to the challenges in measuring the three absolute neutrino masses\, we
  currently only know the two mass-squared differences manifested in ne
 utrino oscillation data. The mass ordering is very likely to be the fi
 rst experimental handle we could have on physics related to neutrino m
 ass. Thus a concrete experimental measurement could provide invaluable
  clues to the fundamental questions in particle physics. The means to 
 measure the neutrino mass ordering via neutrino oscillation can be gro
 uped into two types: one natural approach is to take the advantage of 
 the so-called Matter Effect which happens in solar neutrinos and has m
 ade differentiating two of the three neutrino mass eigenstates possibl
 e\; the other is quite unique in that it carefully arranges two oscill
 ation frequencies into the same energy spectrum which would exhibit di
 fferent phase shifts under different mass orderings. In this talk\, we
  will give a general review on neutrino physics\, the discovery of neu
 trino oscillation and its recent experimental progresses\, and explain
  the different experimental efforts of measuring neutrino mass orderin
 g. The second type approach utilizing nuclear reactor neutrinos was ma
 de possible by the unexpected large value of the third mixing angle θ
 13 measured by the current generation short-baseline reactor neutrino 
 experiments. We will focus more on the only neutrino oscillation exper
 iment taking the second type approach: the Jiangmen Underground Neutri
 no Observatory (JUNO)\, which plans to measure neutrino mass ordering 
 utilizing powerful nuclear reactors in Southern China. We will explain
  its design\, recent progresses and its physics opportunities.
URL:https://www.physics.wisc.edu/events/?id=5043
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