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SUMMARY:Constraints on Symmetric Dark Matter from Neutron Star Capture and
  Collapse
DTSTART:20260813T050000Z
DTEND:20260813T070000Z
DTSTAMP:20260728T092400Z
UID:indico-event-1381@indico.ibs.re.kr
DESCRIPTION:Speakers: Yuxin Liu (UCAS)\n\nNeutron stars are known to const
 rain asymmetric dark matter because accumulated particles can trigger coll
 apse. I will show that these constraints extend much further: even when da
 rk matter is produced with equal particle and antiparticle abundances\, th
 e capture process inside a neutron star can become intrinsically asymmetri
 c if the two species scatter off nucleons with slightly different strength
 s. This difference arises naturally from interference between interaction 
 terms with specific charge-conjugation properties\, and turns out to be ge
 neric across the full set of allowed dark matter?nucleon couplings. As a r
 esult\, neutron stars can exclude extremely small scattering rates over a 
 wide mass range\, and the constraints remain effective even when the captu
 re asymmetry is tiny. Neutron stars probe not only abundance asymmetries b
 ut also the microscopic structure of dark matter interactions\, significan
 tly broadening their impact on dark matter theory.\n\nhttps://indico.ibs.r
 e.kr/event/1381/
URL:https://indico.ibs.re.kr/event/1381/
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