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Recent Nuclear Theory Activities at the KFKI RMKI

Recent Nuclear Theory Activities at the KFKI RMKI. Tradition & Names Grops & Topics Example Statistics. Talk by T.S.Biró at the NUPECC Meeting, Budapest, Oct. 07, 2011.

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Recent Nuclear Theory Activities at the KFKI RMKI

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  1. Recent Nuclear TheoryActivities at the KFKI RMKI Tradition & Names Grops & Topics Example Statistics Talk by T.S.Biró at the NUPECC Meeting, Budapest, Oct. 07, 2011

  2. Tradition and Names • Topical spectrum: nuclear, particle, gravity, math in close connection • Kuti, Hasenfratz, Montvay, Polónyi, Szlachányi: lattice QCD, QGP • Lukács, Montvay, Zimányi: QGP, hydro, thermo • Zimányi, Bencze, Révai, Doleschall: quantum nuclear • Zimányi School: Csernai, Biró, Lévai, Csörgő: QGP, HBT, SQM, HI, pQCD, ALCOR • Lovas School: Polónyi, Wolf: effective field theory in nuclear phyics

  3. Groups and Topics • Thermodynamics: Biró, Ván, Molnár, Ürmössy • Fundamental questions: relativity, dissipation, stability, causality, • Non-extensive systems: hadronization, spectra, fluctuating environment (superstatistics MCarlo) • Phenomenological models: quark coalescence, QGP, jet and parton statistics, spectra • The origin of temperature: Unruh, Hawking, Bekenstein, Jackson…  example

  4. Groups and Topics • Hydrodynamics: Csernai, Csörgő, (Csanád), Nagy, Vértesi • Computer solutions • Analytic solutions • Eta mass / chiral symmetry restoration • Pion laser • close connection to: PHENIX, TOTEM

  5. Groups and Topics • Hydrodynamics: Lévai, Barnaföldi, Kalmár, Pochybova, Hamar, … • pQCD caluclation, jets, partons • Fragmentation vs recombination, ALCOR • Numerical simulation of plasma and strong fields • Jet identification software • Close connection to: ALICE

  6. Groups and Topics • Hadrodynamics: Wolf, Zetenyi, Kovacs, … • Effective field theory models • Resonances in dense hadronic matter • Photon and dilepton production  example • Elementary classical problems with fields • Close connection to: FAIR

  7. Example: Thermal looking spectra from classical fields • Recent work by Biro [RMKI], Schram [Debrecen], Gyulassy [RMKI and Columbia] • Semiclassical bremsstrahlung • Point charge with constant acceleration • Analytically solvable non-constant acceleration • Generalization to the radiation of massive particles • PHENIX pp data on gamma spectra • Connection to Unruh, Hawking, Bekenstein…

  8. Soft classical bremsstrahlung

  9. Transverse flow interpretation ? Mathematica knows: ( I derived it using Feynman variables) Alike Jüttner distributions integrated over the flow rapidity…

  10. The reverse problem • Photon spectrum  amplitude • Amplitude  Fourier component • Phase  velocity • Velocity  rapidity • Rapidity  acceleration • Acceleration  Path x ( t )

  11. Analytic results x(t), v(t), g(t), τ(t), 𝒜, dN/kdkdα limit

  12. Bessel-K compendium 1. 2. 3. 3  1 : expand Dirac delta as Fourier integral, 3  2 : rewrite integral over difference and the sum bx = x1 + x2

  13. Dileptonproductioninheavy-ioncollisions HADES detector @ GSI • measureelectron-positronpairspectrainheavy-ion andelementarycollisions Dileptons (electron-positron pairs) do not participate in strong interaction → they leave the dense phase unchanged Neutral vector mesons (ρ0, ω) decay directly to e+e- → their spectral function can be studied on the dilepton spectrum

  14. Calculation of dilepton spectra Boltzmann-Uhling-Uhlenbeck (BUU) type transport model H W Barz, B Kämpfer, Gy Wolf, M Zétényi, Open Nucl. & Part. Phys. Journal 3 (2010) 1. • solve a Boltzmann-likeequationusing test particles • dileptonsources: - Bremsstrahlung,NN →NNe+e- -vectormesondecays, e.g. ρ→ e+e- - Dalitz-decays of baryonresonances, R → Ne+e- mesons, e.g. η→γe+e- Off-shelltransport • takeinto account themodification of particlepropertiesinthemedium →theparticlemasscanchangeduringpropagation

  15. Vectormesonspectralfunctionsinthemedium Change of test particlemassduringpropagation (ρ meson; C+C, 2 A GeV) • differentprescriptionsforthein-medium • ρ mass shift • differentprescriptionsforthelifetime, τ • redcircle: ρmesonabsorbed, ordecaying

  16. Resulting di-electron spectra Significance of in-mediumeffects Comparisontoexperimentaldata blackcurve: vacuumspectralfunction violetcurve:in-mediumspectralfunction

  17. Statistics • Researchers: age distribution, qualifications • Support: basic vs project • Publication: journals and impacts • Visibility: citations, invitations, teaching, public appearences, awards and honors • Committee work: MTA, OTKA, RMKI TT and directorship, EPJ SAC, NUPECC, EPJA • Organization: HCBM 2010, Zimanyi School, IAC memberships in SigmaPhi, SQM, QM…

  18. Distribution of scientific degrees 4 2 7 5

  19. Distribution of WoS topics 422 articles 519 categories 221 132 99

  20. Publication activity

  21. Citations

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