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SUMMARY:At the Edge of the Known Universe: New Discoveries from DESI
DTSTART:20250909T070000Z
DTEND:20250909T090000Z
DTSTAMP:20260818T023200Z
UID:indico-event-1010@indico.ibs.re.kr
DESCRIPTION:Speakers: Graziano Rossi (Sejong U)\n\nThe Dark Energy Spectro
 scopic Instrument (DESI) is carrying out the most ambitious spectroscopic 
 survey ever undertaken\, mapping the three-dimensional structure of the un
 iverse to shed light on dark energy and the dark sector. Key questions inc
 lude determining the sum of neutrino masses\, constraining the number of e
 ffective neutrino species\, and testing whether dark energy is truly a cos
 mological constant or evolves with time. After a short overview of the cos
 mological context and on the DESI experiment\, I will discuss recent progr
 ess on these topics\, focusing in particular on results from DESI’s seco
 nd data release (DR2). With DR2\, DESI has now produced the largest and mo
 st detailed 3D map of the cosmos\, reaching sub-percent precision on the e
 xpansion history and setting a new benchmark beyond all previous surveys. 
 Intriguingly\, the latest measurements provide hints that dark energy may 
 not be static\, with implications for standard methods of cosmological neu
 trino mass constraints. I will also present new approaches to cosmic web a
 nalysis that improve sensitivity to neutrino physics and offer alternative
 s to the conventional framework. The talk will conclude with a look at the
  broader impact for particle and high-energy physics\, and the emerging op
 portunities to advance our understanding of neutrinos and the fundamental 
 interactions that shape the universe.\n\nhttps://indico.ibs.re.kr/event/10
 10/
URL:https://indico.ibs.re.kr/event/1010/
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