1 Physics of High Baryon Densities - The CBM experiment at FAIR Subhasis Chattopadhyay Variable Energy Cyclotron Centre, Kolkata for the CBM collaboration Outline: Outline: CBM physics CBM physics CBM setup CBM setup Feasibility Feasibility studies studies Detector R&D Detector R&D CBM
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1 Physics of High Baryon Densities - The CBM experiment at FAIR Subhasis Chattopadhyay Variable Energy Cyclotron Centre, Kolkata for the CBM collaboration.
3 What is the equation-of-state of strongly interacting matter? (core collapse supernovae, neutron stars, early universe) What is the structure of strongly interacting matter as a function of T and ρ B ? (hot and dense hadronic medium, deconfined phase, phase transitions ?) What are the in-medium properties of hadrons as a function of T and ρ B ? (restoration of chiral symmetry ?) Questions of QCD After RHIC & LHC we need measurements at large baryon density
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Physics of High Baryon Densities - The CBM experiment at FAIR
Subhasis Chattopadhyay Variable Energy Cyclotron Centre, Kolkata
High-energy heavy-ion collision experiments:RHIC, LHC: cross over transition, QGP at high T and low ρLow-energy RHIC: search for QCD-CP with bulk observables NA61@SPS: search for QCD-CP with bulk observables CBM@FAIR: scan of the phase diagram with bulk and rare observables
Exploring the QCD Phase diagram
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What is the equation-of-state of strongly interacting matter? (core collapse supernovae, neutron stars, early universe)
What is the structure of strongly interacting matter as a function of T and ρB ? (hot and dense hadronic medium, deconfined phase, phase transitions ?)
What are the in-medium properties of hadrons as a function of T and ρB ? (restoration of chiral symmetry ?)
Questions of QCD
After RHIC & LHC we need measurements at large baryon density
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Onset of chiral symmetry restoration at high B
in-medium modifications of hadrons (,, e+e-(μ+μ-), D)
Deconfinement phase transition at high B excitation function and flow of strangeness (K, , , , ) excitation function and flow of charm (J/ψ, ψ', D0, D, c)
The equation-of-state at high B
collective flow of hadrons particle production at threshold energies (open charm?)
QCD critical endpoint excitation function of event-by-event fluctuations (K/π,...)
CBM: detailed measurement over precise energy bins (pp, pA, AA)
FAIR beam energy range 2-45 AGeV (protons 90 GeV)
What do we need to measure?
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Net-baryon densities in central Au+Au collisions at FAIR:consistent picture from transport models
Compilation by J. Randrup, CBM Physics Book, in preparationsee also I.C. Arsene et al., Phys. Rev. C 75 (2007) 034902
At FAIR energy: large baryon density will be achieved over long time
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Elliptic flow at FAIRAMPT calculations: C.M. Ko at CPOD 2007
Measure flow for all particles over CBM energy range
Romania: NIPNE BucharestRussia:IHEP ProtvinoINR TroitzkITEP MoscowKRI, St. PetersburgKurchatov Inst., MoscowLHE, JINR DubnaLPP, JINR DubnaLIT, JINR DubnaMEPHI MoscowObninsk State Univ.PNPI GatchinaSINP MSU, Moscow St. Petersburg P. Univ.Ukraine: Shevshenko Univ. , Kiev
India:Aligarh Muslim Univ.Panjab Univ. Rajasthan Univ.Univ. of Jammu Univ. of KashmirUniv. of CalcuttaB.H. Univ. VaranasiVECC KolkataSAHA KolkataIOP BhubaneswarIlT KharagpurKorea:Korea Univ. SeoulPusan National Univ.Norway:Univ. Bergen