Current research activities on heavy-ion physics in Korea: hot and rare Byungsik Hong (Korea University) THE 31 st ASRC International Workshop “International Workshop on Hadron Physics” JAEA, Tokai, Japan, January 18-20, 2016 Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 1
Introduction to Korean HI Community Subject Accelerator Experiment Participating institutes (# of faculties) ALICE Inha (2), Pusan (1), Sejong (2), Yonsei (2) LHC CMS Chonnam (1), Korea (1) Hot QGP Chonbuk (1), Ewha (1), Hanyang (1), PHENIX Korea (1), Myongji (1), Seoul (1), Yonsei (2) RHIC STAR Pusan (1) Dense FAIR CBM Pusan (1) Matter SAMURAI RIBF IBS (1), Korea (1) TPC RIB (EoS, E sym ) Chonbuk (1), Chonnam (1), IBS (1), RAON LAMPS Inha (1), Korea (2) Small community: ≲ 16 experimental faculties Similar number of theoretical faculties Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 2
Major Experimental Contributions ∗ Experiment Contributions Leading institutes • ITS upgrade Inha, Pusan, Yonsei ALICE • Heavy-flavor production Inha • Forward RPC production Korea CMS • Quarkonium & HF productions in pA & AA Korea • Forward RPC production Korea • MPC-Ex Si sensor production Yonsei • Quarkonium production in pp, pA & AA PHENIX Korea • Single muon production in pp, pA & AA Yonsei • Spin structure of protons Seoul, Korea SAMURAI TPC • Tracking software development Korea • TPC development IBS, Korea LAMPS • Neutron wall development Korea Hardware: Si sensors, Gas detectors (RPC & TPC), Neutron detectors Analysis: Muons, Quarkonia, Heavy flavors * Disclaimer: The list is not complete and may be a biased view. Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 3
Nuclear Phase Diagram Two examples : Quarkonium @ CMS and LAMPS @ RAON Hot Rare Quark-hadron Mixed phase Liquid-gas coexistence 1 with RIB 0 Supernova IIa Neutron stars 𝑎/𝑂 Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 4
I. Quarkonium Analysis in CMS Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 5
Quarkonium Production 1. pp Reference to understand pA and AA data Production mechanism not well understood – Color Octet vs. Color Singlet Polarization for interaction of quarkonia with surroundings, not affected by initial- state effect 2. pA Nuclear modification of gluon PDF (nPDF): shadowing, saturation, CGC, etc. Medium-induced coherent gluon radiation Co-mover absorption 3. AA Color-charge screening effect: 𝜇 𝐸 vs. 𝑠 – Sequential suppression: Different states dissociate at different temperatures Regeneration of 𝑟 and ത 𝑟 A. Mocsy et al., – Expected to be larger for 𝐾/𝜔 than for Υ PRD 77, 014501 (2008) Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 6
CMS Detector CALORIMETERS Superconducting Coil (3.8 T) Weight: 12,500 tons ECAL Diameter: 15 m 76k scintillating Length: 22 m HCAL PbWO 4 crystals Plastic scintillator/ Brass sandwich Steel YOKE BSC MB trigger HF MB trigger TRACKER Centrality in HI Pixels (66M Ch.) Silicon Microstrips (9.6M Ch.) 220 m 2 of silicon sensors MUON ENDCAPS MUON BARREL Cathode Strip Chambers HF(EM HF(EM +HAD) +HAD) Resistive Plate Chambers Drift Tube Chambers Resistive Plate Chambers Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 7
Muons in CMS Excellent ID and triggering capabilities in the muon system Excellent momentum resolution in tracker (overall ~ 1-2%) Global muons = Standalone muons x Tracker information Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 8
𝜈 − 𝜈 + Invariant Mass in 2011 ) 2 y CMS Preliminary J/ 𝐾/𝜔 Events/(GeV/c PbPb s = 2.76 TeV 𝜍, 𝜕, 𝜚 r w f , NN 4 10 ¡ (1,2,3S) Υ(1,2,3𝑇) y 𝜔(2𝑇) (2S) 𝑀 𝑗𝑜𝑢 PbPb m -1 L (PbPb) = 147 b 3 int = 147 𝜈b −1 10 𝑎 Z 2 10 10 mm > 6.5 GeV/c for | h | < 1.6 p T mm > 3 GeV/c for 1.6 < | h | < 2.4 p T 1 m p > 4 GeV/c T 2 1 10 10 𝑛 𝜈𝜈 GeV/c 2 2 m (GeV/c ) m m Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 9
𝐾/𝜔 Analysis Method Direct Simultaneous fit 𝑲/𝝎 𝜈 − 𝜈 + invariant mass – Prompt 𝑲/𝝎 – Feed-down Pseudo-proper decay length Inclusive from 𝑲/𝝎 y ′ and c c 𝑛 𝐾/𝜔 Non-prompt 𝑚 𝐾/𝜔 = 𝑀 𝑦𝑧 𝑲/𝝎 from 𝑞 𝑈 𝑪 decays JHEP 05, 063 (2012) 𝝉 𝒏 = 34 MeV comparable to pp Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 10
𝐾/𝜔 in PbPb 𝑒 2 𝑂 𝐵𝐵 /𝑒𝑞 𝑈 𝑒𝜃 𝑆 𝐵𝐵 𝑞 𝑈 = < 𝑈 𝐵𝐵 > 𝑒 2 𝜏 𝑂𝑂 /𝑒𝑞 𝑈 𝑒𝜃 CMS-PAS-HIN-12-014 Prompt 𝑞 𝑈 𝑂 𝑞𝑏𝑠𝑢 𝑧 Nonprompt from B decays Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 11
𝐾/𝜔 in PbPb 𝐶 → 𝐾/𝜔 𝐸 0 Charged hadrons Yield is larger at lower 𝑞 𝑈 and Compare to ALICE D mesons 𝑆 𝐵𝐵 𝐶 > 𝑆 𝐵𝐵 (𝐸) > 𝑆 𝐵𝐵 (ℎ ± ) midrapidity in central PbPb Consistent with regeneration Consistent with mass ordering − Dead cone effect? scenario Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 12
𝑤 2 of Prompt 𝐾/𝜔 in PbPb CMS-PAS-HIN-12-001 Finite 𝑤 2 for prompt 𝐾/𝜔 in the measured 𝑞 𝑈 range Low 𝑞 𝑈 (< 8 GeV/c): 𝑤 2 for prompt 𝐾/𝜔 < 𝑤 2 for ℎ ± or prompt 𝐸 High 𝑞 𝑈 (> 8 GeV/c): 𝑤 2 for prompt 𝐾/𝜔 ≈ 𝑤 2 for ℎ ± Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 13
𝜔(2𝑇) in PbPb For 3 < 𝑞 𝑈 <30 GeV/c 𝑞𝑞 in 1.6 < 𝑧 < 2.4 / 𝜔 2𝑇 𝐾/𝜔 𝑆 𝜔(2𝑇) in central CMS, PRL 113, (20%) PbPb is ∼ 5 262301 (2014) 𝑄𝑐𝑄𝑐 times larger than that in pp with larger 𝜔 2𝑇 𝐾/𝜔 systematic error. For 6.5< 𝑞 𝑈 <30 GeV/c in 𝑧 < 1.6 𝑆 𝜔(2𝑇) in central ALICE, arXiv:1506.08804 (20%) PbPb is ∼ 2 times smaller than that in pp. Indication of y (2 S ) being less suppressed than J/ y (<2 s effect) at low 𝑞 𝑈 in the most central events: Need more 𝐾/𝜔 statistics from Run II. Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 14
𝛷(𝑜𝑇) in PbPb ↑ Centrality integrated (0-100%) results: 𝛷 states suppressed sequentially 𝑆 𝐵𝐵 Υ(1S) = 0.425 ± 0.029 ± 0.070 𝑆 𝐵𝐵 Υ(2S) = 0.116 ± 0.028 ± 0.022 CMS-PAS-HIN-15-001 𝑆 𝐵𝐵 Υ(3S) < 0.14 at 95% CL ↗ Anisotropic hydrodynamic model for thermal suppression of bottomonia – 2 temperatures along 𝑧 , 3 shear viscosities, no CNM, no regeneration, … ↗ Transport model taking into account CNM and regeneration Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 15
𝛷(𝑜𝑇) in PbPb CMS-PAS-HIN-15-001 ← 𝛷 suppression does not strongly depend on kinematics. ↑ Anisotropic hydro model cannot reproduce the forward data: CNM may help? Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 16
𝐶 production in pPb CMS-PAS-HIN-14-004, arXiv:1508.06678, Submitted to PRL CMS detector performance plot (2011 PbPb data at 2.76 TeV) 𝐶 analysis in pPb 0 within uncertainties – No modification for 𝐶 ± , 𝐶 0 , 𝐶 𝑇 – Baseline for PbPb CMS capability to reconstruct 𝐶 in PbPb – First fully reconstructed 𝐶 in PbPb environment – Expect interesting physics results from RUN II PbPb with higher statistics Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 17
III. Detector Development for LAMPS @ RAON Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 18
RAON: New RIB Accelerator in Korea Radioactive-ion beams by ISOL & IF ‒ ISOL: Direct fission of 238 U by protons @ 70 MeV ‒ IF: Fragmentation by 8.3 p m A 238 U @ 200 MeV/c High-intensity neutron-rich RI beams ‒ E.g., 132 Sn beams up to 250 AMeV with 10 8 pps More exotic RI beams by combining ISOL & IF Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 19
LAMPS L arge- A cceptance M ulti- P urpose S pectrometer = Solenoid Spectrometer ⊕ Dipole Spectrometer ⊕ Neutron Array Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 20
EoS and Symmetry Energy 𝐹 𝜍, 𝜀 /𝐵 = 𝐹 𝜍, 𝜀 = 0 + 𝐹 𝑡𝑧𝑛 𝜍 𝜀 2 + 𝒫 𝜀 4 + ⋯ Τ with 𝜍 = 𝜍 𝑜 + 𝜍 𝑞 and 𝜀 = (𝜍 𝑜 − 𝜍 𝑞 ) (𝜍 𝑜 + 𝜍 𝑞 ) Useful expansion of 𝐹 𝑡𝑧𝑛 𝜍 around 𝜍 0 2 𝐿 𝑡𝑧𝑛 𝑀 𝜍−𝜍 0 𝜍−𝜍 0 𝐹 𝑡𝑧𝑛 𝜍 = 𝐾 + + 3 𝜍 0 18 𝜍 0 𝜖𝐹 𝑡𝑧𝑛 𝜍 3 𝑀 = 𝜍 0 𝑄 𝑡𝑧𝑛 = 3𝜍 0 ቚ (slope) 𝜖𝜍 𝜍=𝜍 0 𝜖 2 𝐹 𝑡𝑧𝑛 𝜍 𝐿 𝑡𝑧𝑛 = 9𝜍 02 ฬ (curvature) 𝜖𝜍 2 𝜍=𝜍 0 Primary physics goal of LAMPS is ‒ To explore the nuclear symmetry energy ( 𝐾, 𝑀, 𝐿 𝑡𝑧𝑛 ) from sub-saturation to supra-saturation densities. Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 21
Time Projection Chamber Central Au+Au at 250 AMeV IQMD Simulation of triple GEM by GARFIELD++ − Gas mixture: Ar 90% + CH 4 10% − Voltage for each foil ∼ 400 V − <Gain> ∼ 1.4 Χ 10 6 − <Drift velocity> ∼ 50 mm/ m s − <Dispersion> ≲ 3 mm Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 22
TPC Simulation Track Recon=Riemann Tracking+GENFIT Central Au+Au at 250 AMeV Byungsik Hong Int. Workshop on Hadron Physics @ JAEA 23
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