Dileptons in NN and AA collisions
|
|
- Cora Neal
- 5 years ago
- Views:
Transcription
1 Dileptons in NN and AA collisions Hendrik van Hees Goethe-Universität Frankfurt November 28, 2011 Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
2 Outline 1 Electromagnetic probes in heavy-ion collisions 2 Dileptons at SIS energies (with GiBUU) 3 Dileptons at SPS and RHIC (QGP+hadronic many-body+fireball) 4 Conclusions Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
3 Electromagnetic probes in heavy-ion collisions γ, l ± : no strong interactions reflect whole history of collision: from pre-equilibrium phase from thermalized medium QGP and hot hadron gas from VM decays after thermal freezeout dn/(dy dm) π 0, η Dalitz decays ρ/ω Φ DD J/ Ψ ψ Drell Yan π,... ρ/ω γ e e + Low Intermediate High Mass Region > 10 fm > 1 fm < 0.1 fm M [GeV/c] Fig. by A. Drees [R. Rapp, J. Wambach, HvH, Landoldt-Börnstein, I/23, 4-1 (2010), arxiv: [hep-ph] ] Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
4 Vector Mesons and electromagnetic Probes l + l thermal emission rates em. current-correlation function, Π µν [L. McLerran, T. Toimela 85, H. A. Weldon 90, C. Gale, J.I. Kapusta 91] dn e + e d 4 xd 4 q = g µν α 2 3q 2 Im Π(ret) π3 µν (q) f B (q 0 ) q 2 =M 2 e + e vector-meson dominance model: Π µν = G ρ γ γ hadronic many-body theory for vector mesons ρ π B *, a 1, K 1,... ρ ρ ρ π N, K, π,... elementary processes cut self-energy diagrams Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
5 Relation to the QCD-phase diagram at high temperature/density: restoration of chiral symmetry Lattice QCD: Tc χ Tc deconf Mass Mechanism of chiral restoration? Two main theoretical ideas dropping masses : m had ψψ melting resonances : broadening of spectra through medium effects More theoretical question: Realization of chiral symmetry in nature? Spectral Function Spectral Function "ρ" "ρ" Dropping Masses? Melting Resonances? "a 1 " "a 1 " pert. QCD pert. QCD Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
6 Dileptons at SIS energies dileptons from heavy-ion collisions at DLS at E = 1A GeV [Porter et al, PRL 79, 1229 (1997)] large enhancement at low invariant masses unexplained DLS puzzle [Bratkovskaya et al (1999)] [Ernst et al (1998)] DLS measurement confirmed by HADES! [Fuchs et al (2003)] Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
7 Motivation for Transport Models description of various nuclear reactions within one framework pa, γa, ea, νa, AA time evolution of system need dynamical approach transport models well suited for Monte-Carlo simulations (test-particle approach) strongly interacting many-body system: medium modifications of hadrons challenging task: description of broad resonance-like excitations off-shell transport with consistent dynamical evolution of spectral properties conservation laws thermodynamic consistency in this talk: GiBUU model [O. Buss et al arxiv: [hep-ph]; Rept.] dileptons in pp and pnb collisions (HADES) work with J. Weil, K. Gallmeister,... Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
8 The Boltzmann-Uehling-Uhlenbeck Equation time evolution of phase-space distribution functions [ t + ( p H i ) x ( x H i ) p ]f i (t, x, p) = I coll [f 1,..., f i,..., f j ] Hamiltonian H i selfcons. hadronic mean fields, Coulomb pot., off-shell pot. collision term I coll two- and three-body decays/collisions multiple coupled-channel problem at low reaction energies: resonance model at high reaction energies: (modified) PYTHIA new: extend resonance model to cover whole HADES range Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
9 Resonance Model reactions dominated by resonance scattering: ab R cd Breit-Wigner cross-section formula σ ab R cd = 2s R + 1 4π (2s a + 1)(2s b + 1) p 2 lab sγ ab R Γ R cd (s mr 2 )2 + sγ 2 tot applicable for low-energy nuclear reactions [Teis (PhD thesis 1996)] Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
10 Dileptons in GiBUU uses strict vector-meson dominance (J µ had. em. V µ ) Resonance model in Teis: NN NR, ; extension NN RR (m R 2 GeV) Teis: describes exclusive π, 2π, ρ, η production extension: πη, πρ, 3π, 2η, 2ρ,... lack of experimental data fit to PYTHIA πρ, πη dominant for HADES energies s max = 3.2 GeV NN R (Nπ)(ηN), (Nπ)(ρN) new production channels NN S 11 (1535) NNπη, NN N NNπρ with N {D 13 (1520), S 11 (1650), F 15 (1680), P 13 (1720)}; NN NNπρ with {S 31 (1620), D 33 (1700), F 35 (1905) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
11 ρ-production spectrum mass spectrum for ρ e + e production in 3.5 GeV pp collisions ( s = 3.18 GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
12 ρ-production spectrum mass spectrum for ρ production in 3.5 GeV pp collisions ( s = 3.18 GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
13 Dileptons in 3.5 GeV pp collisions Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
14 Dileptons in 3.5 GeV pp collisions Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
15 Dileptons in 1.25 GeV pp collisions pp well described pn from dp trouble for pn (work in progress) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
16 Dileptons at SPS and RHIC radiation from thermal sources: Hadronic many-body theory [R. Rapp, J. Wambach 99] baryon effects important n B +n B relevant quantity (not net-baryon density)! ρ π B *, a 1, K 1,... ρ ρ ρ π N, K, π,... Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
17 Dilepton rates: Hadron gas QGP in-medium hadron gas matches with QGP similar results also for γ rates quark-hadron duality!? consistent with chiral-symmetry restoration resonance melting rather than dropping masses Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
18 Sources of dilepton emission in heavy-ion collisions 1 initial hard processes: Drell Yan 2 core emission from thermal source [McLerran, Toimela 1985] 1 dn (thermal) = q T dmdq T d 4 x dy Mdϕ dn(thermal) d 4 xd 4 q Acc(M, q T, y) use cylindrical thermal fireball with QGP, mixed and hadronic phase 3 corona emission from primordial mesons (jet-quenching) 4 after thermal freeze-out emission from freeze-out mesons [Cooper, Frye 1975] d N (fo) 3 q = q 0 q µ dσ µ f B (u µ q µ /T ) Γ meson l + l Acc Γ meson Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
19 CERES/NA45 dielectron spectra (dn ee /dm) / <N ch > [100 MeV/c 2 ] good agreement also for dielectron spectra in 158 GeV Pb-Au low-mass tail from baryon effects Pb(158 AGeV)+Au (7% central) <N ch >=335 CERES 00 in-med ρ+ω+φ 4π mix QGP DY total total (no bar ρ) p t >0.2GeV 2.1<η<2.65 Θ ee >35mrad M ee [GeV] (d 2 N ee /dηdm) / (dn ch /dη) [100MeV] % Central Pb(158AGeV)+Au <N ch >=250 Cocktail QGP CERES free ρ in-med ρ+ω+φ+qgp+4π p t >0.2GeV 2.1<η<2.65 Θ ee >35mrad 4π M ee [GeV] Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
20 M spectra (in p T slices) norm corrected by 3% due to centrality correction (min-bias data: N ch = 120, calculation N ch = 140) (1/N ch ) d 2 N µµ /(dm dη) (20 MeV) T c =T ch =175 MeV, a t =0.1 c 2 /fm all q T NA60 in-med ρ QGP prim ρ FO ρ 4π mix DY ω φ ω-t ex total +ω-t ex M (GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
21 M spectra (in p T slices) norm corrected by 3% due to centrality correction (min-bias data: N ch = 120, calculation N ch = 140) (1/N ch ) d 2 N µµ /(dm dη) (20 MeV) T c =T ch =175 MeV, a t =0.1 c 2 /fm 0<q t <0.2 GeV NA60 in-med ρ QGP prim ρ FO ρ 4π mix DY ω φ ω-t ex total +ω-t ex M (GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
22 M spectra (in p T slices) norm corrected by 3% due to centrality correction (min-bias data: N ch = 120, calculation N ch = 140) (1/N ch ) d 2 N µµ /(dm dη) (20 MeV) T c =T ch =175 MeV, a t =0.1 c 2 /fm 0.2 GeV<q t <0.4 GeV NA60 in-med ρ QGP prim ρ FO ρ 4π mix DY ω φ ω-t ex total +ω-t ex M (GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
23 M spectra (in p T slices) norm corrected by 3% due to centrality correction (min-bias data: N ch = 120, calculation N ch = 140) (1/N ch ) d 2 N µµ /(dm dη) (20 MeV) T c =T ch =175 MeV, a t =0.1 c 2 /fm 0.4 GeV<q t <0.6 GeV NA60 in-med ρ QGP prim ρ FO ρ 4π mix DY ω φ ω-t ex total +ω-t ex M (GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
24 M spectra (in p T slices) norm corrected by 3% due to centrality correction (min-bias data: N ch = 120, calculation N ch = 140) (1/N ch ) d 2 N µµ /(dm dη) (20 MeV) T c =T ch =175 MeV, a t =0.1 c 2 /fm 0.6 GeV<q t <0.8 GeV NA60 in-med ρ QGP prim ρ FO ρ 4π mix DY ω φ ω-t ex total +ω-t ex M (GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
25 M spectra (in p T slices) norm corrected by 3% due to centrality correction (min-bias data: N ch = 120, calculation N ch = 140) (1/N ch ) d 2 N µµ /(dm dη) (20 MeV) T c =T ch =175 MeV, a t =0.1 c 2 /fm 0.8 GeV<q t <1.0 GeV NA60 in-med ρ QGP prim ρ FO ρ 4π mix DY ω φ ω-t ex total +ω-t ex M (GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
26 M spectra (in p T slices) norm corrected by 3% due to centrality correction (min-bias data: N ch = 120, calculation N ch = 140) (1/N ch ) d 2 N µµ /(dm dη) (20 MeV) T c =T ch =175 MeV, a t =0.1 c 2 /fm 1.0 GeV<q t <1.2 GeV NA60 in-med ρ QGP prim ρ FO ρ 4π mix DY ω φ ω-t ex total +ω-t ex M (GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
27 M spectra (in p T slices) norm corrected by 3% due to centrality correction (min-bias data: N ch = 120, calculation N ch = 140) (1/N ch ) d 2 N µµ /(dm dη) (20 MeV) T c =T ch =175 MeV, a t =0.1 c 2 /fm 2.0 GeV<q t <2.2 GeV NA60 in-med ρ QGP prim ρ FO ρ 4π mix DY ω φ ω-t ex total +ω-t ex M (GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
28 M spectra (in p T slices) norm corrected by 3% due to centrality correction (min-bias data: N ch = 120, calculation N ch = 140) (1/N ch ) d 2 N µµ /(dm dη) (20 MeV) T c =T ch =175 MeV, a t =0.1 c 2 /fm 2.2 GeV<q t <2.4 GeV NA60 in-med ρ QGP prim ρ FO ρ 4π mix DY ω φ ω-t ex total +ω-t ex M (GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
29 Importance of baryon effects baryonic interactions important! in-medium broadening low-mass tail! (1/N ch ) d 2 N µµ /(dm dη) (20 MeV) NA60 no baryons full model all q T T 10-9 c =T ch =175 MeV, a t =0.1 c 2 /fm M (GeV) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
30 IMR: QGP vs. multi-pion radiation dn µµ /dm (counts) semicentral In-In all p T QGP (EoS-A) QGP (EoS-B) QGP (EoS-C) 4π (EoS-A) 4π (EoS-B) 4π (EoS-C) M (GeV) different critical and freeze-out temperatures T c = MeV, T chem = MeV M- and p T spectra comparably well described! reason: T vs. volume maximal l + l emission for T = T max = M/5.5 hadronic and partonic radiation dual for T T c compatible with chiral-symmetry restoration! inconclusive whether hadronic or partonic emission in IMR! Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
31 (Another) new Puzzle? huge enhancement in the LMR unexplained yet! /GeV) IN PHENIX ACCEPTANCE 2 (c dn/dm ee 10-1 min. bias Au+Au s = 200 GeV NN DATA y < 0.35 e p > 0.2 GeV/c cc ee (PYTHIA) cc ee (random correlation) R.Rapp & H.vanHees cocktail T sum w/ ρ vacuum sum w/ ρ broadening sum/ ρ dropping) partonic yield (PY) model: Rapp, HvH [A. Adare et al (PHENIX), PRC 81, (2010)] (GeV/c ) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24 m ee
32 Conclusions and Outlook dilepton spectra in-medium em. current correlator SIS energies GiBUU for pp, pn with resonance modell for all HADES energies pn still a problem (work in progress) p Nb, AA work in progress similar study within UrQMD in progress (with S. Endres) SPS and RHIC energies excess yield dominated by radiation from thermal sources baryons essential for in-medium properties of vector mesons melting vector mesons with little mass shift IMR well described by scenarios with radiation dominated either by QGP or multi-pion processes (depending on EoS) quark-hadron duality of l + l rates around T c compatible with chiral symmetry restoration! new RHIC?!? studies in UrQMD+hydro hybrid model planned (with S. Endres) Hendrik van Hees (GU Frankfurt) The Dilepton Probe November 28, / 24
The Dilepton Probe from SIS to RHIC
The Dilepton Probe from SIS to RHIC Hendrik van Hees Justus-Liebig Universität Gießen April 14, 2010 Institut für Theoretische Physik JUSTUS-LIEBIG- UNIVERSITÄT GIESSEN Hendrik van Hees (JLU Gießen) The
More informationThe Dilepton Probe from SIS to RHIC
The Dilepton Probe from SIS to RHIC Hendrik van Hees Justus-Liebig Universität Gießen May 13, 2011 Institut für Theoretische Physik JUSTUS-LIEBIG- UNIVERSITÄT GIESSEN Hendrik van Hees (JLU Gießen) The
More informationElectromagnetic Probes in Ultrarelativistic Heavy-Ion Collisions
Electromagnetic Probes in Ultrarelativistic Heavy-Ion Collisions Hendrik van Hees Justus-Liebig Universität Gießen September 1, 2009 Institut für Theoretische Physik JUSTUS-LIEBIG- UNIVERSITÄT GIESSEN
More informationTheoretical Review of Dileptons from Heavy Ion Collisions
Theoretical Review of Dileptons from Heavy Ion Collisions Hendrik van Hees Texas A&M University February 8, 28 Hendrik van Hees (Texas A&M University) Theoretical Dilepton Review February 8, 28 1 / 22
More informationMedium Modifications of Hadrons and Electromagnetic Probe
Medium Modifications of Hadrons and Texas A&M University March 17, 26 Outline QCD and Chiral Symmetry QCD and ( accidental ) Symmetries Theory for strong interactions: QCD L QCD = 1 4 F a µν Fµν a + ψ(i
More informationElectromagnetic probes: Messengers from the hot and dense fireball
Electromagnetic probes: Messengers from the hot and dense fireball Hendrik van Hees Goethe University Frankfurt November 5, 2014 Hendrik van Hees (GU Frankfurt) Electromagnetic probes November 5, 2014
More informationDileptons with a coarse-grained transport approach
Dileptons with a coarse-grained transport approach Hendrik van Hees Goethe University Frankfurt and FIAS July 19, 017 in collaboration with S. Endres, J. Weil, M. Bleicher Hendrik van Hees (GU Frankfurt/FIAS)
More informationDileptons in heavy-ion-collisions
Dileptons in heavy-ion-collisions Hendrik van Hees Goethe University Frankfurt and FIAS January 11, 018 Hendrik van Hees (GU Frankfurt/FIAS) Dileptons in HICs January 11, 018 1 / 46 Outline 1 Heavy-ion
More informationQ a u r a k k m a m t a t t e t r e p r p ob o e b d e d b y b y di d l i e l p e t p o t n o s
Quark matter probed by dileptons Olena Linnyk July 02, 2010 Information from photons and dileptons 14 12 10 ε/t 4 8 6 4 2 Lattice QCD: µ B =0 µ B =530 MeV 0 0.5 1.0 1.5 2.0 2.5 3.0 T/T c But what are the
More informationA Theoretical View on Dilepton Production
A Theoretical View on Dilepton Production Transport Calculations vs. Coarse-grained Dynamics Stephan Endres (in collab. with M. Bleicher, H. van Hees, J. Weil) Frankfurt Institute for Advanced Studies
More informationDilepton Production from Coarse-grained Transport Dynamics
Dilepton Production from Coarse-grained Transport Dynamics Stephan Endres (in collab. with M. Bleicher, H. van Hees, J. Weil) Frankfurt Institute for Advanced Studies ITP Uni Frankfurt ECT* Trento Workshop
More informationHadrons in hot and dense matter IV
Hadrons in hot and dense matter IV Hendrik van Hees Goethe University Frankfurt and FIAS July 17-1, 17 Hendrik van Hees (GU Frankfurt/FIAS) Hadrons in hot and dense matter IV July 17-1, 17 1 / 58 Outline
More informationProbing the QCD phase diagram with dileptons a study using coarse-grained transport dynamics
Probing the QCD phase diagram with dileptons a study using coarse-grained transport dynamics Stephan Endres, Hendrik van Hees, and Marcus Bleicher Frankfurt Institute for Advanced Studies, Ruth-Moufang-Straße
More informationOutline: Introduction
Electromagnetic radiation in hadronic interactions: from pp to AA collisions Outline: Introduction Lijuan Ruan (Brookhaven National Laboratory) Recent results on dileptons (dielectrons) Recent results
More informationThermal dileptons as fireball probes at SIS energies
Thermal dileptons as fireball probes at SIS energies Critical Point and Onset of Deconfinement 2016, Wrocław. Florian Seck TU Darmstadt in collaboration with T. Galatyuk, P. M. Hohler, R. Rapp & J. Stroth
More informationThermal dileptons from coarse-grained transport as probes of hot and dense QCD matter
Thermal dileptons from coarse-grained transport as probes of hot and dense QCD matter Lunch Club Seminar, Universität Gießen Florian Seck TU Darmstadt in collaboration with T. Galatyuk, R. Rapp & J. Stroth
More informationHeavy Quarks in Heavy-Ion Collisions
Heavy Quarks in Heavy-Ion Collisions Hendrik van Hees with T. Lang, J. Steinheimer, M. Bleicher Goethe University Frankfurt and FIAS July 18, 213 Hendrik van Hees (GU Frankfurt/FIAS) Heavy Quarks in HICs
More informationA fresh look at the radiation from the QGP
A fresh look at the radiation from the QGP Wolfgang Cassing (Uni. Giessen) In collaboration with Taesoo Song, Elena Bratkovskaya, Pierre Moreau The Erice School on Nuclear Physics 2018 The Strong Interaction:
More informationLow mass dileptons from Pb + Au collisions at 158 A GeV
PRAMANA cfl Indian Academy of Sciences Vol. 60, No. 5 journal of May 2003 physics pp. 1073 1077 Low mass dileptons from Pb + Au collisions at 158 A GeV SOURAV SARKAR 1, JAN-E ALAM 2;Λ and T HATSUDA 2 1
More informationvector mesons in medium: motivation & basic ideas theoretical models & simulation techniques:
Outline vector mesons in medium: motivation & basic ideas theoretical models & simulation techniques: hadronic transport models (example: GiBUU) coarse graining (with UrQMD) results: light VM in medium
More informationHeavy flavor with
Heavy flavor with CBM@FAIR Hendrik van Hees Goethe University Frankfurt and FIAS April 21, 2015 Hendrik van Hees (GU Frankfurt/FIAS) Heavy flavor with CBM@FAIR April 21, 2015 1 / 22 Outline 1 Motivation:
More informationHeavy-Quark Transport in the QGP
Heavy-Quark Transport in the QGP Hendrik van Hees Goethe-Universität Frankfurt November 9, 211 Hendrik van Hees (GU Frankfurt) Heavy-Quark Transport November 9, 211 1 / 19 Motivation Fast equilibration
More informationarxiv: v3 [nucl-ex] 22 Feb 2010
Electromagnetic Probes Itzhak Tserruya Weizmann Institute of Science, Rehovot, Israel October 8, 018 arxiv:0903.0415v3 [nucl-ex] Feb 0 Abstract A review is presented of dilepton and real photon measurements
More informationPhenomenology of Heavy-Ion Collisions
Phenomenology of Heavy-Ion Collisions Hendrik van Hees Goethe University Frankfurt and FIAS October 2, 2013 Hendrik van Hees (GU Frankfurt/FIAS) HIC Phenomenology October 2, 2013 1 / 20 Outline 1 Plan
More informationLepton and Charm Measurements in the First Two Years of RHIC: An Experimental Overview
Lepton and Charm Measurements in the First Two Years of RHIC: An Experimental Overview Ralf Averbeck State University of New York at Stony Brook INT/RHIC Winter Workshop, Seattle, December 13-15, 2002
More informationHadronic Transportwith the GiBUU model
Hadronic Transport with the GiBUU model Frankfurt Institute for Advanced Studies, Germany Workshop on Nuclear Photoproduction with GLUEX Jlab, April 28, 2016 Outline the GiBUU model basic features and
More informationPenetrating probe of the hot, dense medium
Penetrating probe of the hot, dense medium Low mass dileptons (M ll
More informationThermal EM Radiation in Heavy-Ion Collisions
Thermal EM Radiation in Heavy-Ion Collisions Ralf Rapp Cyclotron Institute + Dept of Phys & Astro Texas A&M University College Station, USA Symposium on Jet and Electromagnetic Tomography of Dense Matter
More informationThermal Electromagnetic Radiation in Heavy-Ion Collisions
EPJ manuscript No. (will be inserted by the editor) Thermal Electromagnetic Radiation in Heavy-Ion Collisions R. Rapp 1, H. van Hees,3 1 Cyclotron Institute and Department of Physics & Astronomy, Texas
More informationProject B.5: Hadrons in Nuclear Matter
Project B.5: Hadrons in Nuclear Matter Janus Weil, Murat Kaskulov, Ulrich Mosel Institut für Theoretische Physik, JLU Giessen Arbeitstreffen SFB/TR 16 Bochum, 09.09.2010 Outline introduction/motivation
More informationMeasurements of the electron-positron continuum in ALICE
EPJ Web of Conferences 6, 0000 (01) DOI:.1/ epjconf/ 0160000 C Owned by the authors, published by EDP Sciences, 01 Measurements of the electron-positron continuum in ALICE Christoph Baumann a for the ALICE
More informationPhoton Production in a Hadronic Transport Approach
Photon Production in a Hadronic Transport Approach Niklas Ehlert in collaboration with: Juan Torres-Rincon, Janus Weil and Hannah Petersen Transport Meeting, July 12, 2016 Outline Introduction and motivation
More informationMFT: Motivations and Expectations
Physics Week NFN NF Frascati 18 pril 2012 ntonio Uras for the MFT Working Group yon group @ PN Outline Physics Motivations ow mass and low pt dimuon reach: a unique feature at the H ow pt reach for open
More informationSome aspects of dilepton production in HIC
Some aspects of dilepton production in HIC Qun Wang University of Science and Technology of China (USTC) In collaboration with H.J.Xu, J.Deng, X.Dong, L.J.Ruan, Z.B.Xu, N.Xu, P.F.Zhuang, Y.F. Zhang Electromagnetic
More informationQuarkonia physics in Heavy Ion Collisions. Hugo Pereira Da Costa CEA/IRFU Rencontres LHC France Friday, April
Quarkonia physics in Heavy Ion Collisions Hugo Pereira Da Costa CEA/IRFU Rencontres LHC France Friday, April 5 2013 1 2 Contents Introduction (QGP, Heavy Ion Collisions, Quarkonia) Quarkonia at the SPS
More informationDirect Photon Production from Heavy Ion Collisions
Direct Photon Production from Heavy Ion Collisions Bjørn Bäuchle The UrQMD Group (http://urqmd.org) based on PRC 81 (2010) 044904 and ongoing work FIAS Frankfurt Institutt for fysikk og teknologi, Universitetet
More informationDirect Photons in Heavy-Ion Collisions from Microscopic Transport Theory and Fluid Dynamics
Direct Photons in Heavy-Ion Collisions from Microscopic Transport Theory and Fluid Dynamics Bjørn Bäuchle, Marcus Bleicher The UrQMD-Group Based on [arxiv:0810.0488 (nucl-th)] DPG Spring Meeting March
More informationDirect Photons in Heavy-Ion Collisions from Microscopic Transport Theory and Fluid Dynamics
HGS-HIRe Helmholtz Graduate School for Hadron and Ion Research Direct Photons in Heavy-Ion Collisions from Microscopic Transport Theory and Fluid Dynamics Bjørn Bäuchle, Marcus Bleicher The UrQMD-Group
More informationDi-electron production at ultra-relativistic energies
Di-electron production at ultra-relativistic energies J. Manninen 1 & E. Bratkovskaya 1 O. Linnyk 2 & W. Cassing 2 P.B. Gossiaux 3 & J. Aichelin 3 C. M. Ko 4 & T. Song 4 1 Frankfurt Institute for Advanced
More informationDirect Photons in Heavy-Ion Collisions from Microscopic Transport Theory and Fluid Dynamics
Direct Photons in Heavy-Ion Collisions from Microscopic Transport Theory and Fluid Dynamics Bjørn Bäuchle, Marcus Bleicher The UrQMD-Group Palaver November 24 th, 2008 Collaborators The UrQMD-Group Marcus
More informationThe QGP phase in relativistic heavy-ion collisions
The QGP phase in relativistic heavy-ion collisions Elena Bratkovskaya Institut für Theoretische Physik & FIAS, Uni. Frankfurt Conference on Exciting Physics Makutsi-Range Range, South Africa,, 13-20 November,
More informationC. Djalali, M. H. Wood (University of South Carolina) R. Nasseripour ( George Washington University) D. P. Weygand (Jefferson Lab)
Sixth International Conference on PERSPECTIVES IN HADRONIC PHYSICS 12-16 May 2008, M. H. Wood (University of South Carolina) R. Nasseripour ( George Washington University) D. P. Weygand (Jefferson Lab)
More informationHeavy-Quark Transport in the QGP
Heavy-Quark Transport in the QGP Hendrik van Hees Justus-Liebig Universität Gießen October 13, 29 Institut für Theoretische Physik JUSTUS-LIEBIG- UNIVERSITÄT GIESSEN Hendrik van Hees (JLU Gießen) Heavy-Quark
More informationPhotoabsorption and Photoproduction on Nuclei in the Resonance Region
Photoabsorption and Photoproduction on Nuclei in the Resonance Region Susan Schadmand Institut für Kernphysik First Workshop on Quark-Hadron Duality Frascati, June 6-8, 2005 electromagnetic probes Hadron
More informationHadronic equation of state and relativistic heavy-ion collisions
Hadronic equation of state and relativistic heavy-ion collisions Pasi Huovinen J. W. Goethe Universität Workshop on Excited Hadronic States and the Deconfinement Transition Feb 23, 2011, Thomas Jefferson
More informationElliptic flow. p y. Non-central collision of spherical nuclei or central collision of deformed nuclei. Overlapping zone is of almond shape
Outline: Non-central collision of spherical nuclei or central collision of deformed nuclei Overlapping zone is of almond shape Co ordinate space anisotropy is converted into momentum space anisotropy via
More information+ High p T with ATLAS and CMS in Heavy-Ion 2.76TeV
+ High p T with ATLAS and CMS in Heavy-Ion Collisions @ 2.76TeV Lamia Benhabib On behalf of ATLAS and CMS HCP 2011, Paris lamia.benhabib@llr.in2p3.fr +Outlook Introduction : hard probes Strongly interacting
More informationDirect Photons in Heavy-Ion Collisions
Direct Photons in Heavy-Ion Collisions Outline Bjørn Bäuchle Table of contents Goethe-Uni Frankfurt, FIAS Disputation 13. Dezember 21 Motivation & Introduction The Model UrQMD, γ Results: Spectra and channels
More informationarxiv: v1 [nucl-ex] 12 May 2008
1 Highlights from PHENIX - II arxiv:0805.1636v1 [nucl-ex] 12 May 2008 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Terry C. Awes (for the PHENIX Collaboration ) Oak
More informationBeijing. Charmed hadron signals of partonic medium. Olena Linnyk
Beijing Charmed hadron signals of partonic medium Olena Linnyk Our goal properties of partonic matter Hadron-string models Experiment QGP models Observables Hadron abundances J/Ψ anomalous suppression
More informationRecent Results from RHIC: On the trail of the Quark-Gluon Plasma
Recent Results from RHIC: On the trail of the Quark-Gluon Plasma Single Au+Au Collision seen by STAR@RHIC Gunther Roland Gunther Roland/MIT July 15 2003 MPI Munich 15/7/2003 Gunther Roland/MIT www.spiegel.de
More informationExploring dense matter at FAIR: The CBM Experiment
Exploring dense matter at FAIR: The CBM Experiment What s it all about Landmarks of the QCD phase diagram: deconfinement phase transition chiral phase transition critical point 2 Signatures of phase transition
More informationSub Threshold strange hadron production in UrQMD
Sub Threshold strange hadron production in UrQMD Jan Steinheimer and Marcus Bleicher 10.05.2016 Jan Steinheimer and Marcus Bleicher (FIAS) 10.05.2016 1 / 26 Motivation Recent measurements on near and below
More informationThe direct photon puzzle
The direct photon puzzle Jean-François Paquet January 16, 2017 ALICE Journal Club Jean-François Paquet (Stony Brook) 2 What is the direct photon puzzle? > Background
More informationHeavy Flavor Results from STAR
Heavy Flavor Results from STAR Wei Xie for STAR Collaboration (PURDUE University, West Lafayette) Open Heavy Flavor Production D meson direct measurement Non-photonic electron Heavy Quarkonia Production
More informationJet Physics with ALICE
Jet Physics with ALICE Oliver Busch for the ALICE collaboration Oliver Busch Tsukuba 2014 /03/13 1 Outline introduction results from pp jets in heavy-ion collisions results from Pb-Pb collisions jets in
More informationarxiv:nucl-ex/ v1 21 Dec 2004
φ meson production in d + Au collisions at s NN = 00 GeV arxiv:nucl-ex/041048v1 1 Dec 004 1. Introduction Dipali Pal for the PHENIX collaboration Department of Physics & Astronomy, Vanderbilt University,
More informationMULTI-CHANNEL MEASUREMENTS OF LIGHT VECTOR MESONS AT PHENIX
International Journal of Modern Physics E Vol. 16, Nos. 7 & 8 (2007) 2154 2159 c World Scientific Publishing Company MULTI-CHANNEL MEASUREMENTS OF LIGHT VECTOR MESONS AT PHENIX KENTA SHIGAKI [PHENIX Collaboration]
More informationHeavy Ion Physics Lecture 3: Particle Production
Heavy Ion Physics Lecture 3: Particle Production HUGS 2015 Bolek Wyslouch echniques to study the plasma Radiation of hadrons Azimuthal asymmetry and radial expansion Energy loss by quarks, gluons and other
More informationNeutral meson and direct photon measurement in pp and Pb Pb collisions at midrapidity with the ALICE experiment at the LHC
Neutral meson and direct photon measurement in pp and Pb Pb collisions at midrapidity with the ALICE experiment at the LHC Lucia Leardini Physikalisches Institut Heidelberg on behalf of the ALICE Collaboration
More informationThermal Dileptons as Fireball Thermometer and Chronometer
Thermal Dileptons as Fireball Thermometer and Chronometer Ralf Rapp a, Hendrik van Hees b,c a Cyclotron Institute and Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843-3366,
More informationDynamical equilibration of stronglyinteracting
Dynamical equilibration of stronglyinteracting infinite parton matter Vitalii Ozvenchuk, in collaboration with E.Bratkovskaya, O.Linnyk, M.Gorenstein, W.Cassing CPOD, Wuhan, China 11 November 2011 1 Motivation
More informationOverview* of experimental results in heavy ion collisions
Overview* of experimental results in heavy ion collisions Dipartimento di Fisica Sperimentale dell Universita di Torino and INFN Torino * The selection criteria of the results presented here are (to some
More informationOutline: Introduction and Motivation
Heavy ion collisions at lower energies: challenges and opportunities Beam Energy Scan (BES I and II) from RHIC Lijuan Ruan (Brookhaven National Laboratory) Outline: Introduction and Motivation Results
More informationThe chiral anomaly and the eta-prime in vacuum and at low temperatures
The chiral anomaly and the eta-prime in vacuum and at low temperatures Stefan Leupold, Carl Niblaeus, Bruno Strandberg Department of Physics and Astronomy Uppsala University St. Goar, March 2013 1 Table
More informationReview of photon physics results at Quark Matter 2012
Review of photon physics results at Quark Matter 2012 Jet Gustavo Conesa Balbastre 1/28 Why photons? Direct thermal: Produced by the QGP Measure medium temperature R AA > 1, v 2 > 0 Direct prompt: QCD
More informationCharm production at RHIC
1 Charm production at RHIC Charm 2007 Conference Cornell University, Ithaca, NY 5 August 2007 2 The Quark Gluon Plasma T c Early universe quark-gluon plasma LHC RHIC Tri-critical point? Quark deconfinement
More informationThe Quark-Gluon Plasma and the ALICE Experiment
The Quark-Gluon Plasma and the ALICE Experiment David Evans The University of Birmingham IoP Nuclear Physics Conference 7 th April 2009 David Evans IoP Nuclear Physics Conference 2009 1 Outline of Talk
More informationHeavy quark production and elliptic flow at RHIC and LHC
Heavy quark production and elliptic flow at RHIC and LHC Jan Uphoff with O. Fochler, Z. Xu and C. Greiner Institute for Theoretical Physics Hirschegg January 20, 2010 Outline Motivation Charm processes
More informationEquation of state. Pasi Huovinen Uniwersytet Wroc lawski. Collective Flows and Hydrodynamics in High Energy Nuclear Collisions
Equation of state Pasi Huovinen Uniwersytet Wroc lawski Collective Flows and Hydrodynamics in High Energy Nuclear Collisions Dec 14, 2016, University of Science and Technology of China, Hefei, China The
More informationStrangeness Production at SIS: Au+Au at 1.23A GeV with HADES & Microscopic Description by Transport Models
Strangeness Production at SIS: Au+Au at 1.23A GeV with HADES & Microscopic Description by Transport Models Timo Scheib Goethe Universität Frankfurt am Main // Outline HADES at SIS Strangeness Production
More informationSmall systems Resonances hadronic phase partonic phase?
Christina Markert University of Texas at Austin Small systems Resonances hadronic phase partonic phase? NeD-216, Phuket, Thailand, 31 Oct - 5 Nov 216 1 Phase diagram of nuclear matter (QCD) NeD-216, Phuket,
More informationStrangeness in Nucleus
Strangeness in Nucleus L. Fabbietti! Technische Universitaet Muenchen Excellence Cluster Origin and Structure of the Universe https://www.e12.ph.tum.de/groups/kcluster Utrecht University WS214-15 O. Arnold,
More informationHeavy Ions at the LHC: First Results
Heavy Ions at the LHC: First Results Thomas Schaefer North Carolina State University Heavy ion collision: Geometry R Au /γ y R Au x b z rapidity : y = 1 2 log ( E + pz E p z ) transverse momentum : p 2
More informationPhoton and neutral meson production in pp and PbPb collisions at ALICE
Photon and neutral meson production in pp and PbPb collisions at ALICE Dieter Roehrich University of Bergen, Norway for the ALICE Collaboration Nuclear collisions at the LHC Photons as a probe for the
More informationPoS(Confinement8)110. Latest Results on High-p t Data and Baryon Production from NA49
Latest Results on High-p t Data and Baryon Production from NA49 for the NA49 Collaboration Institut für Kernphysik, J.W. Goethe Universität, Frankfurt am Main, Germany E-mail: blume@ikf.uni-frankfurt.de
More informationParton dynamics in heavy-ion collisions from FAIR to LHC
Parton dynamics in heavy-ion collisions from FAIR to LHC Wolfgang Cassing Erice, 21.09.2012 The holy grail: Search for the critical point The phase diagram of QCD Study of the phase transition from hadronic
More informationShingo Sakai Univ. of California, Los Angeles
Shingo Sakai Univ. of California, Los Angeles Non-photonic e result in AuAu b/c separation in non-photonic electron by electron-hadron correlations @ pp Bottom production Discuss heavy flavor energy loss
More informationTransport Coefficients of Hadron Matter at Finite Temperature
Transport Coefficients of Hadron Matter at Finite Temperature Andres Ortiz University of Texas at El Paso Department of Physics Dr. Ralf Rapp Texas A&M University Cyclotron Institute Objectives To obtain
More informationHeavy quark and quarkonium evolutions in heavy ion collisions
Heavy quark and quarkonium evolutions in heavy ion collisions Baoyi Chen Tianjin University & Goethe Univeristy Main Collaborators: Pengfei Zhuang, Ralf Rapp, Yunpeng Liu, Xiaojian Du, Wangmei Zha, Carsten
More informationMeasurements of the dilepton continuum in ALICE. Christoph Baumann Resonance Workshop, Austin
Measurements of the dilepton continuum in ALICE Christoph Baumann 07.03.2012 Resonance Workshop, Austin ALICE Central Detectors: Inner Tracking System Time Projection Chamber Time-of-Flight Transition
More informationPuzzles, facts, lessons from dileptons in few GeV energy regime"
International Workshop on In-Medium Effects in Hadronic and Partonic Systems Obergurgl, Austria, February 1-5, 011" Puzzles, facts, lessons from dileptons in few GeV energy regime" Tetyana Galatyuk for
More informationThe History and Lessons of the Hagedorn Model
The History and Lessons of the Hagedorn Model K.A.Bugaev Bogolyubov ITP, Kiev, Ukraine in collaboration with J.B.Ellio", L.W. Phair and L.G.More"o 1 Outline: What T do we see in A+A and elementary particle
More informationSMR/ International Workshop on QCD at Cosmic Energies III. 28 May - 1 June, Lecture Notes. E. Zabrodin University of Oslo Oslo, Norway
SMR/1842-26 International Workshop on QCD at Cosmic Energies III 28 May - 1 June, 2007 Lecture Notes E. Zabrodin University of Oslo Oslo, Norway Open questions of the statistical approach to or little
More informationLow-mass dileptons: A thermometer for the hottest stuff in the universe
Low-mass dileptons: A thermometer for the hottest stuff in the universe orsten Dahms Excellence Cluster Universe - U München! 53 rd International Winter Meeting on Nuclear Physics in Bormio January 30
More informationStudies of Pion Induced Reactions with the HADES Spectrometer Izabela Ciepał for the HADES Collaboration
Studies of Pion Induced Reactions with the HADES Spectrometer Izabela Ciepał for the HADES Collaboration Institute of Nuclear Physics PAS 1 Outline 1) Motivation of the HADES experiment, 2) Electromagnetic
More informationSub-hadronic degrees of freedom in ultrarelativistic nuclear collisions at RHIC and beyond
Sub-hadronic degrees of freedom in ultrarelativistic nuclear collisions at RHIC and beyond Lawrence Berkeley National Laboratory Berkeley, US 1 Introduction: Heavy Ion Physics Today t = 5 10 17 sec T=1
More informationResults from the beam energy scan at RHIC: Exploring the QCD phase structure in A+A collisions
Results from the beam energy scan at RHIC: Exploring the QCD phase structure in A+A collisions Bedanga Mohanty NaConal InsCtute of Science EducaCon and Research (NISER) Outline: ² Phase diagram of QCD
More informationHigh Energy Frontier Recent Results from the LHC: Heavy Ions I
High Energy Frontier Recent Results from the LHC: Heavy Ions I Ralf Averbeck ExtreMe Matter Institute EMMI and Research Division GSI Helmholtzzentrum für Schwerionenforschung Darmstadt, Germany Winter
More informationHagedorn States in Relativistic Heavy Ion Collisions
Hagedorn States in Relativistic Heavy Ion Collisions Jacquelyn Noronha-Hostler Frankfurt Institute for Advanced Studies, Frankfurt am Main Excited Hadrons : February 25 th, 211 : Jefferson Lab Newport
More informationMeasurement of Quenched Energy Flow for Dijets in PbPb collisions with CMS
Measurement of Quenched Energy Flow for Dijets in PbPb collisions with CMS For the CMS Collaboration NPA Seminar Yale, USA 15 October, 2015 Relativistic Heavy Ion Collisions Trying to answer two important
More informationJ/Ψ-suppression in the hadron resonance gas
J/Ψ-suppression in the hadron resonance gas Dariusz Prorok Institute of Theoretical Physics University of Wroc law Wroc law, 17 February 2014 HECOLS workshop and XXXII Max-Born Symposium Dariusz Prorok
More informationMeasurement of light mesons at RHIC by the PHENIX experiment
Eur. Phys. J. C (2009) 61: 835 840 DOI 10.1140/epjc/s10052-009-0879-4 Regular Article - Experimental Physics Measurement of light mesons at RHIC by the PHENIX experiment M. Naglis a for the PHENIX Collaboration
More informationFirst results with heavy-ion collisions at the LHC with ALICE
First results with heavy-ion collisions at the LHC with ALICE Domenico Elia INFN, Bari (Italy) on behalf of the ALICE Collaboration D. Elia (INFN Bari, Italy) PANIC 011 / Boston, MA (USA) July 4-9, 011
More informationHadron Spectroscopy at COMPASS
Hadron Spectroscopy at Overview and Analysis Methods Boris Grube for the Collaboration Physik-Department E18 Technische Universität München, Garching, Germany Future Directions in Spectroscopy Analysis
More informationHigh-p T Neutral Pion Production in Heavy Ion Collisions at SPS and RHIC
High- Neutral Pion Production in Heavy Ion Collisions at SPS and RHIC K. Reygers for the WA98 and the PHENIX collaboration Institut für Kernphysik der Universität Münster Wilhelm-Klemm-Str. 9, D-4849 Münster,
More informationBeam energy scan using a viscous hydro+cascade model
Beam energy scan using a viscous hydro+cascade model Iurii KARPENKO INFN sezione Firenze In collaboration with Marcus Bleicher, Pasi Huovinen and Hannah Petersen Iurii Karpenko (INFN) BES in a viscous
More informationTina Leitner Oliver Buß, Ulrich Mosel und Luis Alvarez-Ruso
Neutrino nucleus scattering Tina Leitner Oliver Buß, Ulrich Mosel und Luis Alvarez-Ruso Institut für Theoretische Physik Universität Gießen, Germany XL. Arbeitstreffen Kernphysik, Schleching 26. Februar
More informationNuclear and Particle Physics 4a Electromagnetic Probes
Nuclear and Particle Physics 4a Electromagnetic Probes Goethe University Frankfurt GSI Helmholtzzentrum für Schwerionenforschung Lectures and Exercise Winter Semester 2016-17 1 Organization Language: English
More informationHeavy-flavour meson production at RHIC
Heavy-flavour meson production at RHIC André Mischke ERC-Starting Independent Research Group QGP - Utrecht 1 Outline Introduction - heavy-flavour production and energy loss in QCD matter Total charm production
More information