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Fixed-Target Program at STAR Daniel Cebra University of - PowerPoint PPT Presentation

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Experimental Results on Hadron Production: Reviewing the AGS and the Fixed-Target Program at STAR Daniel Cebra University of California, Davis Daniel Cebra Probing dense baryonic matter with hadrons Slide 1 of 41 Slide 1 of 41 Daniel Cebra

  1. Studies using Beam Halo Background 2010 - 2014 Goals: • Understand the Beam Halo Background • Determine the applicability of STAR for fixed-target • First of FXT results ➔ Au+Al Slide 19 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  2. Beam Halo on Al Vacuum Pipe Light Ions Heavy Ions 20 Slide 20 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  3. Pion Ratio Analysis STAR PRELIMINARY STAR PRELIMINARY We conclude that there are gold nuclei in the beam halo Slide 21 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  4. Target Design 2014 and 2015 The success of the beam pipe studies motivated installing an internal gold target Target design: Gold foil 1 mm Thick (4%) ~1 cm High ~4 cm Wide ~2 cm below beam axis 210 cm from IR Slide 22 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  5. 2014 ➔ 3.9 GeV Au halo + Au target Slide 23 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  6. Direct Beam Test Run 2015 Goals: • Check the conclusion that there are gold ions in the halo • Determine if the direct beam is a better conduct of operations • Acquire enough data for significant feasibility studies • Physics Analyses ➔ Reproduction of AGS results Slide 24 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  7. FXT Results: pion spectra STAR PRELIMINARY Consistent with AGS results Slide 25 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  8. FXT Results: proton spectra STAR PRELIMINARY Consistent with AGS results (*) Slide 26 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  9. FXT Results: V 0 yields STAR PRELIMINARY STAR PRELIMINARY Consistent with AGS results No AGS K 0 S results at this energy But similar to K + /K - average Slide 27 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  10. FXT Results: spectra overview STAR PRELIMINARY Consistent with AGS results Slide 28 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  11. FXT Results: baryon directed flow STAR PRELIMINARY Consistent with proton results (*) Slide 29 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  12. FXT Results: meson directed flow No AGS results STAR PRELIMINARY Slide 30 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  13. FXT Results: proton elliptic flow Consistent with AGS proton results No AGS pion results STAR PRELIMINARY STAR PRELIMINARY Consistent with AGS results Slide 31 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  14. FXT Results: HBT STAR PRELIMINARY STAR PRELIMINARY Consistent with AGS results Consistent with AGS results Slide 32 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  15. 2018 ➔ 3.85 GeV Au+Au (√S NN = 3.0 GeV) Data Set Data taking started: Thursday 31 May 2018 03:19 EDT with Run 19151029 Data taking completed: Monday 04 June 2018 07:48 EDT with Run 19155021 Total hours of beam: 60 First FXT Physics Run Total physics triggers: 340 Million Result should be available soon Total good events: 309 Million Tigger efficiency: 90% ( Also, we took 7.2 GeV Au+Au FXT data for 72 hours, for a total of 237 M trigger s) Slide 33 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  16. Au+Au 3.0 GeV 2018 3.8 cm radius Al Beam To Fixed target f Pipe at z = 2.01 m h = 0 BBC West BBC-East BBC-West BBC East 3.8 cm radius Be Beam Pipe Yellow Inner Sectors Beam (13 pad rows) VPD-East Outer Sectors (32 pad rows) Slide 34 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  17. Slide 35 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  18. Well centered beam spot; no background Target Holder Gold Target Slide 36 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  19. Centrality ➔ established minimum bias trigger Glauber Model Pileup Cut 60% 30% 5% 0.25% Pile-up Estimate Slide 37 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  20. Physics Goals of the FXT Program The Onset of Deconfinement: • High p T suppression What a STAR FXT Program will not do: • N CQ scaling of Elliptic Flow • Omega’s • LPV through three particle correlators (CME) • Charm • Balance Functions • Doublely Hyper nuclei • Strangeness Enhancement • p+p scan Compressibility ➔ First Order Phase Transition • p+A scan • Directed flow • peripheral collisions • Tilt angle of the HBT source • > 200 Million event per energy • The Volume of the HBT source • > two weeks of beam time • The width of the pion rapidity distributions (Dale) • The zero crossing of the elliptic flow (~6 AGeV) • Volume measures from Coulomb Potential Criticality: • Higher moments No • Particle Ratio Fluctuations measurements in Chirality: this energy range • Dilepton studies Hypernuclei: ➔ Lifetime of the hypertriton Slide 38 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  21. Plans for the Future 2019-2021 • Full FXT proposal was included in the May 2018 Beam Use Request • Approved to run three energies in 2019 • Additional energies will be scheduled in 2020 and 2021 Slide 39 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  22. FXT Program m B (MeV) Collider Fixed- Single Center- Year to Energy Target beam of-mass complete p Energy AGeV Rapidity 62.4 7.7 30.3 2.10 420 2019 39 6.2 18.6 1.87 487 2021? 27 5.2 12.6 1.68 541 2021? 19.6 4.5 8.9 1.52 589 2019 14.5 3.9 6.3 1.37 633 2019 11.5 3.5 4.8 1.25 666 2020 9.1 3.2 3.6 1.13 699 2020 7.7 3.0 2.9 1.05 721 2018 p • Data rate is DAQ limited • Would need 100 Million Events at each energy to make the sensitivity of BES-II • Roughly one to two days per energy Slide 40 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  23. Conclusions • AGS Program provided extensive results at the top energy, but left many observables unmeasured across the energy scan. • FXT program will allow for comprehensive measurements below 7.7 GeV • Acceptance and physics have been demonstrated in test runs and other studies Slide 41 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  24. Extras Slide 42 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  25. STAR PRELIMINARY Mid-rapidity Pion Spectra STAR PRELIMINARY STAR PRELIMINARY STAR PRELIMINARY Mid-rapidity Proton Spectra STAR PRELIMINARY Slide 43 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  26. May 20 th , 2015 • Saturated DAQ 4.5 GeV Au+Au Event Vertices Bandwidth with 4.5 GeV Au+Au 6 bunches. 1,300,000 events • 99.5% triggers were Au+Au Gold events Target Slide 44 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  27. Low Energy Electron Cooling at RHIC • Start with 14.5 and 19,6 Improve 3X improvement luminosity for low energy • Following year, 7.7, 9.1, and 11.5. 4X beams with improvement with electron eCooling cooling • Run 24 weeks DC Electron Gun Slide 45 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  28. The STAR Upgrades and the FXT program Endcap TOF iTPC Upgrade: EndCap TOF Upgrade: • Rebuilds the inner • Rapidity coverage is critical EPD Upgrade: sectors of the TPC • PID at forward rapidity • Improves trigger • Continuous Coverage • Allows higher energy range • Reduces background • Improves dE/dx of FXT program • Allows a better and • Extends h coverage • Ready 2019 independent reaction from 1.5 to 2.2 plane measurement • Lowers p T cut-in from critical to BES physics 125 MeV/c to 60 MeV/c • Ready 2018 • Ready in 2019 Slide 46 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  29. Internal Fixed Target eTOF: PseudoRapidity Considerations Z = -270 cm D Z = 480 cm R min = 110 cm L T η=0 R max = 220 cm cm Small acceptance gap Barrel TOF 210 190 eTOF Outer Sectors Outer Sectors 32 pad rows 32 pad rows 126 120 Inner Sectors Inner Sectors 13 or 40 pads rows 13 or 40 pads rows 60 EPD Inner eTOF edge matches tracking limit 0 -200 -270 200 Slide 47 of 41 Daniel Cebra Probing dense baryonic matter with hadrons Target located at Z = +200 cm 12/Feb/2019 EMMI Workshop - GSI

  30. Comparison of Facilities Facilty RHIC BESII SPS NICA SIS-100 J-PARC HI SIS-300 Exp.: STAR NA61 MPD CBM JHITS +FXT + BM@N Start: 2019-20 2009 2020 2022 2025 2018 2017 Energy: 7.7 – 19.6 4.9-17.3 2.7 - 11 2.7-8.2 2.0-6.2 √ s NN (GeV) 2.5-7.7 2.0-3.5 Rate: 100 HZ 100 HZ <10 kHz <10 MHZ 100 MHZ At 8 GeV 2000 Hz Physics: CP&OD CP&OD OD&DHM OD&DHM OD&DHM Collider Collider Fixed Target Fixed Target Fixed Target Fixed Target Fixed Target Lighter ion CP = Critical Point collisions OD = Onset of Deconfinement DHM = Dense Hadronic Matter Slide 48 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  31. Prospects for Higher Moments New HADES results Need STAR preliminary data here Net-Charge multiplicity • Expect to have a sensitivity roughly comparable to the 7.7 GeV data point Proton multiplicity • Analysis has not yet started • Goal is to have preliminary result ready by STAR preliminary April 2017 for use in the Beam Use Request Slide 49 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  32. p p Slide 50 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  33. Collision Single Fixed Single Center of Energy Beam Target Beam Mass Chemical Events Potential m B (GeV) Energy Root s Rapidity Rapidity (Millions) 200 100 13.713 5.369 2.685 0.276 NA 130 65 11.083 4.938 2.469 0.325 NA 62.4 31.2 7.737 4.204 2.102 0.420 100 39 19.5 6.170 3.734 1.867 0.487 100 27 13.5 5.185 3.366 1.683 0.541 100 19.6 9.8 4.468 3.042 1.521 0.589 100 14.5 7.25 3.904 2.741 1.370 0.633 100 11.5 5.75 3.528 2.507 1.253 0.666 100 9.1 4.55 3.196 2.269 1.134 0.699 100 7.7 3.85 2.985 2.097 1.049 0.721 100 5.0 2.50 2.320 1.644 0.822 0.774 100 Slide 51 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  34. Run 14 and 15 Setup Slide 52 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  35. BES Phase II Proposal BES Phase II is planned for runs in 2019, 2020, and 2021 √S NN ( GeV ) 7.7 9.1 11.5 14.5 19.6 m B (MeV) 420 370 315 250 205 BES I (MEvts) 4.3 --- 11.7 24 36 Rate(MEvts/day) 0.25 1.7 2.4 4.5 BES I L ( 1×10 25 /cm 2 sec ) 0.13 1.5 2.1 4.0 BES II (MEvts) 100 160 230 300 400 Improvement (X) 4 4 4 3 3 Revised estimates Beam Time (weeks) 12 9.5 5.0 5.5 4.5 Slide 53 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  36. AGS E896 Experiment E896 -- Spokesperson: Crawford, Henry J.; Hallman, Tim J. • Forward spectrometer • TOF & neutrons Main Results: Did not find the H 0 di-baryon Slide 54 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  37. Spectra Slide 55 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  38. Spectra -- pions E895_PRC68(2003)054905 Slide 56 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  39. Spectra -- pions E877_PRC62(2000)024901 Slide 57 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  40. Spectra -- pions E802_PRC57(1998)R466 Slide 58 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  41. Spectra -- pions E917_PLB476(2000)1 Slide 59 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  42. Spectra - Kaons E866_PLB490(2000)53 Slide 60 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  43. Spectra -- Kaons E917_PLB490(2000)53 E917_PLB476(2000)1 Slide 61 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  44. Spectra -- Kaons E866_NPA630(1998)571c Slide 62 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  45. Spectra - Protons E917 PRL86(2001)1970 Slide 63 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  46. Spectra -- protons E802_PRC57(1998)R466 Slide 64 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  47. Spectra -- protons E802_PRC60(1999)064901 Slide 65 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  48. Spectra -- protons E895_PRL88(2002)102301 Slide 66 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  49. Spectra -- protons E877_PRC56(1997)3254 Slide 67 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  50. Spectra -- Protons E877_PRC62(2000)024901 Slide 68 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  51. Spectra -- Neutrons E864_PRC60(2000)064903 Slide 69 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  52. Spectra – Light Nuclei E864_PRC61(2000)064908 Slide 70 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  53. Spectra – Light Nuclei Spectra – Light Nuclei E864_PRC61(2000)064908 Slide 71 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  54. Spectra – anti-deuteron E864_PRL85(2000)2685 Slide 72 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  55. Spectra – hyper-nuclei E864_PRC70(2004)024902 Slide 73 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  56. Spectra – anti-proton E864_PRL79(1997)3351 Slide 74 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  57. Spectra – Anti-protons and anti-Lambdas E917_PRL(2001)242301 Slide 75 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  58. Spectra – anti-protons E802_PRL81(1998)2650 Slide 76 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  59. Spectra -- deuterons E814_PRC61(2000)044906 Slide 77 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  60. Spectra -- deuterons E802_PRC60(1990)064901 Slide 78 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  61. Spectra – tritons and helions E814_PRC61(2000)044906 Slide 79 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  62. Spectra – d, t, h E814_PRC50(1994)1077 Slide 80 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  63. Spectra – anti-proton and anti-deuteron E864_PRC59(1999)2699 Slide 81 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  64. Strangeness Slide 82 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  65. Strangeness - Lambdas E877_PRC63(2001)014902 Slide 83 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  66. Strangeness – Phi meson E917_PRC69(2004)054901 Slide 84 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  67. Strangeness – Phi meson E917_PRC69(2004)054901 Slide 85 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  68. Strangeness – Lambdas and Cascades E895_PRL91(2003)202301 Slide 86 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  69. Spectra – Anti-protons and anti-Lambdas E917_PRL(2001)242301 Slide 87 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  70. Directed Flow Slide 88 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  71. Directed Flow -- Protons E895_PRL84(2000)5488 Slide 89 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  72. Directed Flow -- Lambdas E895_PRL86(2001)2533 Slide 90 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  73. Directed Flow – pions and nucleons E877_PRC55(1997)1420 Slide 91 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  74. Directed Flow – protons and pions E877_PRC56(1997)3254 Slide 92 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  75. Directed Flow – Protons and anti-protons E877_PLB485(2000)319 Slide 93 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  76. Directed Flow -- Kaons E895_PRL85(2000)940 Slide 94 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  77. Directed Flow – Lambdas and Protons E877_PRC63(2001)014902 Slide 95 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  78. Elliptic Flow Slide 96 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  79. Elliptic Flow -- protons E877_PRC56(1997)3254 Slide 97 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  80. Elliptic Flow -- protons E895_PRL83(1999)1295 Slide 98 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  81. Elliptic Flow --- protons E895_PRC66(2002)021901 Slide 99 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

  82. HBT Slide 100 of 41 Daniel Cebra Probing dense baryonic matter with hadrons 12/Feb/2019 EMMI Workshop - GSI

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