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SUMMARY:Astrophysical constraints on the cold equation of state of the str
 ongly interacting matter
DTSTART:20260529T120000Z
DTEND:20260529T130000Z
DTSTAMP:20260526T113200Z
UID:indico-event-1803@indico.wigner.hu
DESCRIPTION:Speakers: György Wolf (HUN-REN Wigner RCP)\n\nAt present\, th
 e only experimental access to the properties of cold\, dense strongly inte
 racting matter is provided by astrophysical observations. Neutron stars ar
 e the only known systems in the Universe that reach densities several time
 s higher than normal nuclear density at nearly zero temperature\, making t
 hem unique laboratories for studying dense matter. Since most neutron star
  observables are sensitive to the equation of state (EOS)\, observational 
 data place stringent constraints on the EOS of strongly interacting matter
 .\nIn this talk\, we investigate constraints arising from perturbative QCD
  calculations at asymptotically high densities ($\\rho\\approx 40 \\rho_0$
 )\, the mass of the heaviest observed neutron star (a black widow pulsar)\
 , NICER mass–radius measurements\, and the tidal deformability inferred 
 from the binary neutron star merger GW170817. We parametrize the EOS and a
 llow its parameters to vary freely\, using observational data to constrain
  the admissible parameter space. We find that neutron star observations si
 gnificantly restrict the EOS of dense strongly interacting matter. While N
 ICER has already provided measurements for five pulsars\, the associated u
 ncertainties remain relatively large. Within our modeling framework\, we f
 ind that the existence of very massive neutron stars and constraints on th
 e tidal deformability provide the most restrictive constraints on the EOS.
 \n\nhttps://indico.wigner.hu/event/1803/
LOCATION:Médiaterem (II. ép.)
URL:https://indico.wigner.hu/event/1803/
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