1 / 22

Hadron Spectra from

Gábor I. Veres / MIT. Hadron Spectra from. for the. PHOBOS Collaboration. Collaboration. Birger Back, Mark Baker, Maarten Ballintijn, Donald Barton, Russell Betts, Abigail Bickley ,

nelson
Télécharger la présentation

Hadron Spectra from

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Gábor I. Veres / MIT Hadron Spectra from for the PHOBOS Collaboration

  2. Collaboration Birger Back,Mark Baker, Maarten Ballintijn, Donald Barton, Russell Betts, Abigail Bickley, Richard Bindel, Wit Busza (Spokesperson), Alan Carroll, Zhengwei Chai, Patrick Decowski, Edmundo García, Tomasz Gburek, Nigel George, Kristjan Gulbrandsen, Stephen Gushue, Clive Halliwell, Joshua Hamblen, Adam Harrington, Conor Henderson, David Hofman, Richard Hollis, Roman Hołyński, Burt Holzman, Aneta Iordanova, Erik Johnson, Jay Kane, Nazim Khan, Piotr Kulinich, Chia Ming Kuo, Willis Lin, Steven Manly, Alice Mignerey, Gerrit van Nieuwenhuizen, Rachid Nouicer, Andrzej Olszewski, Robert Pak, Inkyu Park, Heinz Pernegger, Corey Reed, Michael Ricci, Christof Roland, Gunther Roland, Joe Sagerer, Iouri Sedykh, Wojtek Skulski, Chadd Smith, Peter Steinberg, George Stephans, Andrei Sukhanov, Marguerite Belt Tonjes, Adam Trzupek, Carla Vale, Siarhei Vaurynovich, Robin Verdier, Gábor Veres, Edward Wenger, Frank Wolfs, Barbara Wosiek, Krzysztof Woźniak, Alan Wuosmaa, Bolek Wysłouch, Jinlong Zhang ARGONNE NATIONAL LABORATORY BROOKHAVEN NATIONAL LABORATORY INSTITUTE OF NUCLEAR PHYSICS, KRAKOW MASSACHUSETTS INSTITUTE OF TECHNOLOGY NATIONAL CENTRAL UNIVERSITY, TAIWAN UNIVERSITY OF ILLINOIS AT CHICAGO UNIVERSITY OF MARYLAND UNIVERSITY OF ROCHESTER

  3. PHOBOS Detector System New trigger system for d+Au PID spectra TOF TOF SpecTrig See poster by C. Henderson and G.V.

  4. 1.4 70 1.2 60 1.0 0.8 50 0.6 0.4 40 0.2 30 0 25 20 10 15 0 5 0 5 4 2 3 1 p (GeV/c) Particle ID from low to high pT PHOBOS PID Capabilities 1/v (ps/cm) dE/dx Eloss(MeV) Subm. to PRL nucl-ex/0401006 Stopping particles TOF dE/dx 5.0 0.5 0.05 pT (GeV/c)

  5. Acceptance for PID Analyses TOF dE/dx p p K pT (GeV/c) pT (GeV/c) pT (GeV/c)

  6. n d d+Au: =Ncoll/Npart Subm. to PRC nucl-ex/030913 See poster by A.A. Bickley Particle Ratios Using dE/dx PID PHOBOS 200 GeV

  7. ...p/p Compared to Models PHOBOS Preliminary 200 GeV

  8. n d d+Au: =Ncoll/Npart n Au+Au: =Ncoll/(Npart/2) Subm. to PRC nucl-ex/030913 See poster by A.A. Bickley Particle Ratios Using dE/dx PID PHOBOS 200 GeV

  9. Particle/Antiparticle Ratios using the TOF d+Au T

  10. Identified pT -spectra in d+Au Scale uncertainty: 15% Not feed-down corrected

  11. Particle Composition in d+Au Not feed-down corrected

  12. 2 2 2 mT=m +pT Identified mT-spectra in d+Au Scale uncertainty: 15% Not feed-down corrected

  13. Identified mT-spectra at 200 GeV Au+Au 200 GeV Spectra normalized at 2 GeV/c d+Au p Subm. to PRL nucl-ex/0401006 Scale uncertainty: 15% Not feed-down corrected

  14. y -0.1< <0.2 y -0.5< <-0.2 Comparison: Low Energy d+Au Cronin, PRD 11, 3105, 1975 hlab=3.26 y 0.2< <1.2 Not feed-down corrected

  15. Centrality Dependence of p/h+, p/h- d+Au 200 GeV

  16. Centrality Dependence of p/h+, p/h- d+Au 200 GeV Centrality dependence peripheral 40-70% medium 20-40% central 0-20%

  17. Cronin Effect in d+Au vs. Centrality peripheral central 6% most central Au+Au PRL 91, 072302 (2003)

  18. PRL 91, 072302 (2003)

  19. Cronin Effect as a Function of h (d+Au)

  20. Cronin Effect as a Function of h (d+Au)

  21. Evolution of RdAu with h See poster by J.L. Kane

  22. Summary • Phobos has PID coverage from 0.05 to 3.5 GeV/c in pT First PID ratios and spectra from PHOBOS TOF Surprisingly small centrality dependence of p/p ratios Approximate mT scaling in d+Au as opposed to Au+Au Particle composition in d+Au: similar pT-dependence to lower energy data (but different overall proton fraction) • Study ofh-dependence Exciting newh-dependent RdAu values measured RdAu continuously decreases withh More coming soon...

More Related