Exploring Nuclear Physics and Neutron Stars in Supernova Studies
Dive into the fascinating world of nuclear physics, neutron stars, and supernova cores. Discover the properties of nuclear matter, equation of state effects, and open questions in high-density nuclear matter research.
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Click to edit Master title style Nuclear Physics at JUNO C.LombardoabG.Verdeband M.Settimoc aUn i ve r s i t y o f Ca t a n i a bI NFN Ca t a n i a cSUBATECH, Un i ve r s i t d e Na n t e s , I MT At l a n t i q u e , CNRS- I N2 P3 , Na n t e s , Fr a n c e EU + AM Fall Meeting 2022 Ferrara (Italy) 1
Click to edit Master title style NS as nuclear study case Nuclear open questions and Neutron Stars (NS) 2 2
Click to edit Master title style NS and nuclear physics The properties of nuclear matter relevant for the description of the supernova core and PNS (Proto Neutron Stars) have been studied for decades. 3 3
Click to edit Master title style NS and nuclear physics The properties of nuclear matter relevant for the description of the supernova core and PNS have been studied for decades. Several open questions: Which Equation of State (EoS)? Symmetry energy Effects on light clusters in the neutrinosphere of CC supernova: nuclear matter at sub-saturation density and low temperatures (T less than a few MeV) 4 4
Click to edit Master title style NS and nuclear physics The properties of nuclear matter relevant for the description of the supernova core and PNS have been studied for decades. Several open questions: Which Equation of State? Symmetry energy Clusters in high density nuclear matter All these factors have impact on SN: matter density of PNS compositions of the matter: nucleons or cluster (2H, ..) p reactions in SN 5 5
Click to edit Master title style NS and nuclear physics The properties of nuclear matter relevant for the description of the supernova core and PNS have been studied for decades. Several open questions: Which Equation of State? Symmetry energy Clusters in high density nuclear matter Main problem is the impossibility to reach high density and high temperature in laboratory 6 6
Click to edit Master title style NS and nuclear physics 7 7
Click to edit Master title style NS and nuclear physics Equation of State (EoS) is formed by two parts: E(r,d) E r,d = 0 Esymr ( ) d2 ( )+ ASY -Term d =rn- rp rn+ rp Isospin asymmetry Symmetric NM + asymmetry term = =0.16 fm-3 at T=0 Critical density Interesting region (low density) B.A. Li et al., Phys. Rep. 464, 113 (2008) 8 8
Click to edit Master title style NS and nuclear physics Equation of State (EoS) is formed by two parts: E(r,d) E r,d = 0 Esymr ( ) d2 ( )+ ASY -Term d =rn- rp rn+ rp Isospin asymmetry Symmetric NM + asymmetry term 2 +Ksym r - r0 r0 r - r0 r0 )+L ( Esymr ( ) = Esymr0 +... 3 18 = =0.16 fm-3 at T=0 Critical density 2 2Esymr ( ) r2 curvature ( ) S0= Esymr0 strength Ksym= 9r0 r0 Esymr ( ) r p0 3 L = 3r0 slope = r0 r0 9 9
Click to edit Master title style NS and nuclear physics Clusters in SN core matter Open question: Pure neutron matter? Light clusters such as alpha-particle, Deuterium Impact on neutrinos physics: neutrinos can interact in different ways crossing matter 10 10
Click to edit Master title style NS and nuclear physics Heavy-ion collision data describing the collective flow of nucleons nuclear fragment yields provide constraints on the EoS at supranuclear densities for: 1. not only symmetric nuclear matter 2. but also for neutron-rich matter 11 11
Click to edit Master title style NS and nuclear physics Developing EoS models applicable to simulations of supernova explosions and PNS cooling is complicated by the need to play and control many parameters: a wide range of densities, temperatures and proton fractions, including extreme values that are out of reach of laboratory experiments 12 12
Click to edit Master title style JUNO as Multifield physics detector Studying nuclear physics with SN neutrinos 13 13
Click to edit Master title style Nuclear physics at JUNO Very recently (2022) Super-K studied nuclear consequences on SN . 14 14
Click to edit Master title style Nuclear physics at JUNO Super-K studied nuclear consequences on SN . And JUNO? 15 15
Click to edit Master title style Nuclear physics at JUNO Is it possible to study the SN physics using neutrinos detected by JUNO? SN s nu flux generator JUNO Offline Data output Answer Data analysis 16 16
Click to edit Master title style Nuclear physics at JUNO Challenges: 1. Input data will be provided by physicist working on SN explosions and by physicist working on nuclear topics (G. Verde) 2. Convert the intput files in readable by JUNO Offline 3. Perform simulations of the JUNO detector 4. Results analysis (likelihood methods,..) 17 17
Click to edit Master title style This is our proposal. Any comments or suggestions? Thank you! 18
