Recent Results from PHENIX Stefan Bathe Baruch College, CUNY for the PHENIX collaboration 1/6/16Stefan Bathe, PHENIX Overview, HEP20161 Heavy Ions Time evolution of heavy ion collision 1/6/16Stefan Bathe, PHENIX Overview, HEP20162 Time evolution of heavy ion collision small systems smallest QGP droplet, equilibration, initial state, viscosity 1/6/16Stefan Bathe, PHENIX Overview, HEP20163 Time evolution of heavy ion collision small systems smallest QGP droplet, equilibration, initial state, viscosity Direct photon spectra and flow Space-time evolution 1/6/16Stefan Bathe, PHENIX Overview, HEP20164 Time evolution of heavy ion collision small systems smallest QGP droplet, equilibration, initial state, viscosity Heavy flavor energy loss QGP transport coefficient Direct photon spectra and flow Space-time evolution 1/6/16Stefan Bathe, PHENIX Overview, HEP20165 Time evolution of heavy ion collision small systems smallest QGP droplet, equilibration, initial state, viscosity Heavy flavor energy loss QGP transport coefficient Direct photon spectra and flow Space-time evolution Dileptons Hadronization, chiral symmetry restoration 1/6/16Stefan Bathe, PHENIX Overview, HEP20166 Time evolution of heavy ion collision small systems smallest QGP droplet, equilibration, initial state, viscosity Heavy flavor energy loss QGP transport coefficient Direct photon spectra and flow Space-time evolution Dileptons Hadronization, chiral symmetry restoration Beam Energy Scan Critical point 1/6/16Stefan Bathe, PHENIX Overview, HEP20167 Time evolution of heavy ion collision small systems smallest QGP droplet, equilibration, initial state, viscosity Heavy flavor energy loss QGP transport coefficient Direct photon spectra and flow Space-time evolution Dileptons Hadronization, chiral symmetry restoration Beam Energy Scan Critical point 1/6/16Stefan Bathe, PHENIX Overview, HEP20168 Smallest QGP droplet 1/6/16Stefan Bathe, PHENIX Overview, HEP20169 PLB718 (2013) What is the origin of the ridge in p+A? Smallest QGP droplet 1/6/16Stefan Bathe, PHENIX Overview, HEP PLB718 (2013) Bozek, PRC85 (2012) Dusling, Venugopalan, PRD87 (2013) 5, What is the origin of the ridge in p+A? Smallest QGP droplet? Disentangle initial state from viscosity Geometry Engineering 1/6/16Stefan Bathe, PHENIX Overview, HEP Nagle et al., PRL 113, (2014), figure: Bjoern Schenke, NSAC Long Range Plan, 9/2015 initial state final state p+Au(2015) d+Au(2008) 3 He+Au(2014) hydro Ridge in high-multiplicity 3 He+Au 1/6/16Stefan Bathe, PHENIX Overview, HEP PRL 115, (2015) 2-particle correlation between mid-rapidity track and backward (Au-going) charge separated by 3 units in pseudo-rapidity v 2, v 3 theory comparison 1/6/16Stefan Bathe, PHENIX Overview, HEP Event-plane method mid-rapidity track, FVTX: -3< 0.25: crest in CF -c 2 /c 1 < 0.25: trough in CF Crest extends to p T = 6 GeV/c in central d+Au Similar to high p T v 2 behavior in Au+Au Jets in d+Au 1/6/16Stefan Bathe, PHENIX Overview, HEP minimum bias jets show no energy loss arXiv: Jets in d+Au 1/6/16Stefan Bathe, PHENIX Overview, HEP minimum bias jets show no energy loss Strong centrality dependence But different from that in Au+Au Explanation would be anti-correlation between hard and soft particle production arXiv: Time evolution of heavy ion collision small systems smallest QGP droplet, equilibration, initial state, viscosity Heavy flavor energy loss QGP transport coefficient Direct photon spectra and flow Space-time evolution Dileptons Hadronization, chiral symmetry restoration Beam Energy Scan Critical point 1/6/16Stefan Bathe, PHENIX Overview, HEP201618 Direct photon spectrum 1/6/16Stefan Bathe, PHENIX Overview, HEP PRC 91, (2015) Photons do not interact strongly Carry information from entire space-time history External conversion method Extends previous measurement to lower p T Large exponential excess above pQCD photons Inverse slope of excess: T eff 240 MeV Direct photon flow 1/6/16Stefan Bathe, PHENIX Overview, HEP Large direct photon v 2 observed (similar to hadrons) Large v 3 observed, no significant centrality dependence (similar to hadrons) arXiv: Example model comparison 1/6/16Stefan Bathe, PHENIX Overview, HEP Simultaneous description of large yield and large flow difficult Late emission important Shining sQGP Paquet, Shen, Denicol, Luzum, Schenke, Jeon, Gale, arXiv: Shen, Paquet, Heinz, Gale, PRCC 91, (2015) Gale, Hidaka, Jeon, Lin, Paquet, Pisarski, Satow, Skokov, Vujanovic, PRL 114, (2015) arXiv: Time evolution of heavy ion collision small systems smallest QGP droplet, equilibration, initial state, viscosity Heavy flavor energy loss QGP transport coefficient Direct photon spectra and flow Space-time evolution Dileptons Hadronization, chiral symmetry restoration Beam Energy Scan Critical point 1/6/16Stefan Bathe, PHENIX Overview, HEP201622 PHENIX heavy flavor suppression 1/6/16Stefan Bathe, PHENIX Overview, HEP Discovery of large suppression and elliptic flow of single electrons from heavy flavor decays Expect less bottom suppression (dead cone effect) Separate charm and bottom! PRC84, (2011) Barrel Silicon Vertex Detector 1/6/16Stefan Bathe, PHENIX Overview, HEP Silicon Vertex Detector provides precision measurement of Secondary decay vertex: Distance of Closest Approach (DCA) e+e+ e+e+ R (=bending radius) L (=distance) primary vertex primary vertex B0B0 B0B0 ee ee cc cc DCA resolution < 75 m DCA Unfolding 1/6/16Stefan Bathe, PHENIX Overview, HEP Electron DCA and spectrum depends on hadron distribution, which is not known a priori: requires unfolding (Bayesian inference technique) Parent hadron distribution Decay matrix DCA distribution Electron spectrum Sample with Markov chain MC hadron probability distribution, b/c+b electron ratio hadron probability distribution, b/c+b electron ratio Calculate likelihood Data comparison 1/6/16Stefan Bathe, PHENIX Overview, HEP Accepted in PRC, arXiv: (2015) Data comparison 1/6/16Stefan Bathe, PHENIX Overview, HEP Unfold gives good consistency with DCA T and electron invariant yield Accepted in PRC, arXiv: (2015) Unfolded hadron yields 1/6/16Stefan Bathe, PHENIX Overview, HEP Result of unfolding procedure is invariant yield of charm and bottom vs p T integrated over rapidity Result of unfolding procedure is invariant yield of charm and bottom Accepted in PRC, arXiv: (2015) Unfolded hadron yields 1/6/16Stefan Bathe, PHENIX Overview, HEP Result of unfolding procedure is invariant yield of charm and bottom vs p T integrated over rapidity Result of unfolding procedure is invariant yield of charm and bottom Good agreement with STAR D 0 arXiv: (2015) Accepted in PRC, arXiv: (2015) Bottom electron fraction 1/6/16Stefan Bathe, PHENIX Overview, HEP Accepted in PRC arXiv: (2015 ) Accepted in PRC arXiv: (2015 ) Bottom electron fraction 1/6/16Stefan Bathe, PHENIX Overview, HEP Enhancement above p+p measurements and FONLL at p T = 3-4 GeV/c Accepted in PRC arXiv: (2015 ) Accepted in PRC arXiv: (2015 ) Heavy Flavor R AA 1/6/16Stefan Bathe, PHENIX Overview, HEP Electrons from bottom less suppressed than those from charm for p T < 4 GeV/c Similarly suppressed for p T > 4 GeV/c Looking forward to 10 x statistics from 2014 run See talk by Hidemitsu Asano Accepted in PRC arXiv: (2015 ) Accepted in PRC arXiv: (2015 ) Time evolution of heavy ion collision small systems smallest QGP droplet, equilibration, initial state, viscosity Heavy flavor energy loss QGP transport coefficient Direct photon spectra and flow Space-time evolution Dileptons Hadronization, chiral symmetry restoration Beam Energy Scan Critical point 1/6/16Stefan Bathe, PHENIX Overview, HEP201633 Dileptons 1/6/16Stefan Bathe, PHENIX Overview, HEP Accepted in PRC, arXiv: (2015) Moderate enhancement in low mass region Smaller than previous PHENIX result Consistent with STAR Consistent with broadening Accepted for publication in PRC New measurement with Hadron Blind Detector Sub-percent understanding of background Neural networks for PID Time evolution of heavy ion collision small systems smallest QGP droplet, equilibration, initial state, viscosity Heavy flavor energy loss QGP transport coefficient Direct photon spectra and flow Space-time evolution Dileptons Hadronization, chiral symmetry restoration Beam Energy Scan Critical point 1/6/16Stefan Bathe, PHENIX Overview, HEP201635 Beam Energy Scan Lattice Cumulants of net charge distribution Monotonic ch ange of b at constant T f arXiv: 200 GeV T f = 162 5 MeV Beam Energy Scan Lattice Cumulants of net charge distribution Monotonic ch ange of b at constant T f arXiv: 200 GeV T f = 162 5 GeV 7.7200 GeV Energy density shows power law dependence on beam energy arXiv: E T scales better with N QP than with N part arXiv: Summary and Outlook 1/6/16Stefan Bathe, PHENIX Overview, HEP Strong evidence for collective motion in light-heavy ion collisions Constraints on initial state versus viscosity d+Au energy scan coming up Direct photons strongly constrain space-time evolution First measurement of bottom energy loss Bottom less suppressed than charm at 34 GeV/c Upcoming analysis of high statistics run Final HBD dilepton measurement Consistent with broadening A Large-Acceptance Jet and Detector for RHIC (sPHENIX) 1/6/16Stefan Bathe, PHENIX Overview, HEP Science case endorsed through Department of Energy review First constitutional collaboration meeting December 10-12, 2015, at Rutgers University