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SUMMARY:Cosmological Tensions as Clues to New Paradigms in the Dark Sector
DTSTART:20261106T020000Z
DTEND:20261106T030000Z
DTSTAMP:20261106T194500Z
UID:indico-event-5409@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Mengxiang Lin(林梦翔) (Simon Fraser University)\n
 \nHost: Pengjie ZhangJoin Tencent Meeting：https://meeting.tencent.com/d
 m/yGOgwYcChY86Meeting ID: 742969357 (no password）Abstract:The 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. 
 I will present a stable and technically natural particle-physics realizati
 on of this scenario through interactions between dark baryons and dark axi
 ons. The model exhibits an apparent phantom-crossing behavior in the dark 
 energy equation of state\, consistent with the latest DESI observations\, 
 while also offering a possible resolution to the Hubble tension. Fits to c
 urrent cosmological datasets show evidence for nonzero interactions in the
  dark sector.Biography:Dr. Meng-Xiang Lin is currently a CITA National Fel
 low at Simon Fraser University. Prior to that\, he completed his undergrad
 uate studies at Peking University and earned his Ph.D. from the University
  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 unco
 vering possible new physics behind current cosmological tensions and using
  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
 .\n\nhttps://indico-tdli.sjtu.edu.cn/event/5409/
LOCATION:Tsung-Dao Lee Institute/S4F-SW - Open Area (Tsung-Dao Lee Institu
 te)
URL:https://indico-tdli.sjtu.edu.cn/event/5409/
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