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SEQUENCE:0
UID:UW-Physics-Event-6552
DTSTART:20210727T190000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T231153Z
LAST-MODIFIED:20210723T170626Z
LOCATION: https://berkeley.zoom.us/j/91922781599
SUMMARY:Dark Neutrons: Cosmology and New Astrophysical Signatures\, Ne
 twork in Neutrinos\, Nuclear Astrophysics\, and Symmetries (N3AS) Semi
 nar\, Nirmal Raj\, TRIUMF\, Canada
DESCRIPTION: New states that mix with the neutron\, such as dark baryo
 ns and mirror neutrons\, have been proposed to address dark matter\, b
 aryogenesis\, the long-standing neutron lifetime anomaly\, and the rec
 ent XENON1T excess. I show that such states are extensively probed by 
 (1) Big Bang nucleosynthesis\, (2) cosmic microwave background spectra
 \, (3) stability of nuclides in low-metallicity stars\, (4) a novel me
 chanism to heat neutron stars by tapping the energy stored in their Fe
 rmi seas. This latter effect already constrains a vast range of parame
 ter space\, and provides a powerful motivation for imminent optical\, 
 ultraviolet and infrared astronomical missions\, namely\, of directly 
 probing the properties of the neutron. Talk based on 2012.09865 & 2105
 .09951.
URL:https://www.physics.wisc.edu/events/?id=6552
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