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SUMMARY:Cosmological Tensions as Clues to New Paradigms in the Dark Sector
DTSTART;VALUE=DATE-TIME:20260618T053000Z
DTEND;VALUE=DATE-TIME:20260618T063000Z
DTSTAMP;VALUE=DATE-TIME:20260616T020800Z
UID:indico-event-29603@indico.ihep.ac.cn
DESCRIPTION:Speakers: 梦翔 林 (Simon Fraser University)\nThe nature of 
 dark matter and dark energy remains one of the most profound mysteries in 
 modern physics. In addition to these longstanding theoretical challenges\,
  recent cosmological observations have revealed potential signs of new phy
 sics beyond the standard LCDM paradigm. In this talk\, I will begin with a
  brief overview of current cosmological tensions\, including the latest DE
 SI evidence for dynamical dark energy and the longstanding Hubble tension.
  I will then discuss possible new physics underlying these anomalies\, foc
 using in particular on interactions between dark matter and dark energy.\n
 \nI will present a stable and technically natural particle-physics realiza
 tion of this scenario through interactions between dark baryons and dark a
 xions. The model exhibits an apparent phantom-crossing behavior in the dar
 k energy equation of state\, consistent with the latest DESI observations\
 , while also offering a possible resolution to the Hubble tension. Fits to
  current cosmological datasets show evidence for nonzero interactions in t
 he dark sector.\n\nBio: Dr. Meng-Xiang Lin is currently a CITA National Fe
 llow at Simon Fraser University. Prior to that\, he completed his undergra
 duate studies at Peking University and earned his Ph.D. from the Universit
 y of Chicago\, then join University of Pennsylvania as Postdoctoral Fellow
  at the Center for Particle Cosmology. His research interests span a broad
  range of topics in theoretical cosmology\, with a particular focus on unc
 overing possible new physics behind current cosmological tensions and usin
 g gravitational waves as a probe of fundamental physics. More information 
 can be found on his personal website: https://m-x-lin.github.io/index.html
 \nhttps://indico.ihep.ac.cn/event/29603/
LOCATION:B105 (CHEP)
URL:https://indico.ihep.ac.cn/event/29603/
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