Now showing items 1-20 of 23

  • [2012-05-14] Cold Nuclear Matter Effects on J/ψ Yields as a Function of Rapidity and Nuclear Geometry in d+ A Collisions at sqrt [s_ {NN}]= 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Barnes, P. D.; Boissevain, J. G.; Brooks, M. L.; Butsyk, S.; Camacho, C. M.; Constantin, P.; Grim, G.; Jiang, X.; Kapustinsky, J.; Kunde, G. J.; Lee, D. M.; Leitch, M. J.; Liu, H.; Liu, M. X.; McGaughey, P. L.; Palounek, A. P. T.; Purwar, A. K.; Sondheim, W. E.; Van Hecke, H.W.; Bassalleck, B.; Malik, M. D.; Rak, J.; Thomas, T. L.; Younus, I.; Al-Bataineh, H.; Dharmawardane, K.V.; Kyle, G. S.; Papavassiliou, V.; Pate, S. F.; Stepanov, M.; Wang, X. R.
    We present measurements of J/ψ yields in d+Au collisions at √sNN=200  GeV recorded by the PHENIX experiment and compare them with yields in p+p collisions at the same energy per nucleon-nucleon collision. The measurements ...
  • [2012-05-14] Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in p+ p collisions at sqrt (s)= 62.4 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Barnes, P.D.; Boissevain, J.G.; Brooks, M.L.; Butsyk, S.; Camacho, C.M.; Constantin, P.; Kapustinsky, J.; Kunde, G.J.; Lee, D.M.; Leitch, M.J.; Liu, M.X.; McGaughey, P.L.; Palounek, A.P.T.; Purwar, A.K.; Sondheim, W.E.; Van Hecke, H.W.; Bassalleck, B.; Malik, M.D.; Rak, J.; Thomas, T.L.; Younus, I.; Al-Bataineh, H.; Kyle, G.S.; Liu, H.; Papavassiliou, V.; Pate, S.F.; Stepanov, M.; Wang, X.R.
    The comparison of cross-section predictions with data on single-inclusive hadron production in hadronic collisions, p+p → h + X, is important for understanding perturbative quantum chromodynamics (pQCD). For hadrons produced ...
  • [2012-05-10] Deviation from quark-number scaling of the anisotropy parameter v_2 of pions, kaons, and protons in Au+ Au collisions at sqrt (s_NN)= 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Brooks, M.L.; Butsyk, S.; Camacho, C.M.; Constantin, P.; Kapustinsky, J.; Kunde, G.J.; Lee, D.M.; Leitch, M.J.; Liu, H.; Liu, M.X.; McGaughey, P.L.; Purwar, A.K.; Sondheim, W.E.; Van Hecke, H.W.; Bassalleck, B.; Kotchetkov, D.; Malik, M.D.; Thomas, T.L.; Younus, I.
    Measurements of the anisotropy parameter v2 of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum pT , and transverse kinetic energy KET at midrapidity (|_| < 0.35) in Au+Au ...
  • [2012-05-14] Event structure and double helicity asymmetry in jet production from polarized p+ p collisions at sqrt [s]= 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Barnes, P. D.; Boissevain, J. G.; Brooks, M. L.; Butsyk, S.; Constantin, P.; Kunde, G. J.; Lee, D. M.; Leitch, M. J.; Liu, M. X.; McGaughey, P. L.; Norman, B. E.; Palounek, A. P. T.; Purwar, A. K.; Sondheim, W. E.; Van Hecke, H.W.; Bassalleck, B.; Haegemann, C.; Hobbs, R.; Malik, M. D.; Rak, J.; Thomas, T. L.; Younus, I.; Al-Bataineh, H.; Armendariz, R.; Kyle, G. S.; Papavassiliou, V.; Pate, S. F.; Stepanov, M.; Wang, X. R.
    We report on the event structure and double helicity asymmetry (ALL) of jet production in longitudinally polarized p+p collisions at √s=200  GeV. Photons and charged particles were measured by the PHENIX experiment at ...
  • [2012-05-10] Evolution of pi^ 0 suppression in Au+ Au collisions from sqrt (s_NN)= 39 to 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Aidala, C.; Brooks, M.L.; Guo, L.; Jiang, X.; Kapustinsky, J.; Kunde, G.J.; Lee, D.M.; Leitch, M.J.; Liu, M.X.; McGaughey, P.L.; Sondheim, W.E.; Van Hecke, H.W.; You, Z.; Bassalleck, B.; Butsyk, S.; Younus, I.; Al-Ta’ani, H.; Dharmawardane, K.V.; Kyle, G.S.; Papavassiliou, V.; Pate, S.F.; Tennant, E.; Wang, X.R.
    Neutral-pion, _0, spectra were measured at midrapidity (|y| < 0.35) in Au+Au collisions at psNN = 39 and 62.4GeV and compared to earlier measurements at 200GeV in the 1 < pT < 10GeV/c transverse-momentum (pT ) range. The ...
  • [2012-05-09] Experimental determination of the complete spin structure for p¯p→ Λ¯Λ at p{p¯}= 1.637 GeV/c 

    Fields, Douglas E.; Paschke, K. D.; Quinn, B.; Berdoz, A.; Franklin, G. B.; Khaustov, P.; Meyer, C. A.; Bradtke, C.; Gehring, R.; Goertz, S.; Harmsen, J.; Meier, A.; Meyer, W.; Radtke, E.; Reicherz, G.; Dutz, H.; Pluckthun, M.; Schoch, B.; Dennert, H.; Eyrich, W.; Hauffe, J.; Metzger, A.; Moosburger, M.; Stinzing, F.; Wirth, St.; Fischer, H.; Franz, J.; Heinsius, F. H.; Kriegler, E.; Schmitt, H.; Bunker, B.; Hertzog, D.; Jones, T.; Tayloe, R.; Broders, R.; Geyer, R.; Kilian, K.; Oelert, W.; Rohrich, K.; Sachs, K.; Sefzick, T.; Bassalleck, B.; Eilerts, S.; Kingsberry, P.; Lowe, J.; Stotzer, R.; Johansson, T.; Pomp, S.
    The reaction p.p → ^^ → .pπ+pπ− has been measured with high statistics at a beam momentum of pp. = 1.637 GeV/c. The use of a transversely polarized frozen-spin target combined with the self-analyzing property of ^/^ decay ...
  • [2012-05-14] Heavy-quark production in p+ p and energy loss and flow of heavy quarks in Au+ Au collisions at sqrt [s_ {NN}]= 200 GeV 

    Fields, Douglas E; PHENIX Collaboration; Barnes, P. D.; Boissevain, J. G.; Brooks, M. L.; Burward-Hoy, J. M.; Butsyk, S.; Constantin, P.; Kunde, G. J.; Lee, D. M.; Leitch, M. J.; Liu, M. X.; McGaughey, P. L.; Moss, J. M.; Norman, B. E.; Palounek, A. P. T.; Purwar, A. K.; Sondheim, W. E.; Sullivan, J. P.; Van Hecke, H. W.; Bassalleck, B.; Haegemann, C.; Hobbs, R.; Malik, M. D.; Rak, J.; Thomas, T. L.; Younus, I.; Al-Bataineh, H.; Al-Jamel, A.; Armendariz, R.; Brown, D. S.; Kyle, G. S.; Papavassiliou, V.; Pate, S. F.; Stepanov, M.; Wang, X. R.
    Transverse momentum spectra of electrons (pTe) from semileptonic weak decays of heavy-flavor mesons in the range of 0.3<pTe<9.0 GeV/c have been measured at midrapidity (|y|<0.35) by the PHENIX experiment at the Relativistic ...
  • [2012-04-27] High energy Pb+Pb collisions viewed by pion interferometry 

    Fields, Douglas E.; Bearden, I. G.; Boggild, H.; Boissevain, J.; Dodd, J.; Erazmus, B.; Esumi, S.; Fabjan, C. W.; Ferenc, D.; Franz, A.; Gaardhoje, J.; Hamelin, M.; Hansen, A. G.; Hansen, O.; Hardtke, D.; Van Hecke, H.; Holzer, E. B.; Humanic, T. J.; Hummel, P.; Jacak, B. V.; Jayanti, R.; Kaimi, K.; Kaneta, M.; Kohama, T.; Kopytine, M.; Leltchouk, M.; Ljubicic, A. Jr.; Lorstad, B.; Maeda, N.; Malina, R.; Medvedev, A.; Murray, M.; Ohnishi, H.; Paic, G.; Pandey, S. U.; Piuz, F.; Pluta, J.; Polychronakos, V.; Potekhin, M.; Poulard, G.; Reichhold, D.; Sakaguchi, A.; Simon-Gillo, J.; Schmidt-Sorensen, J.; Sondheim, W.; Spegel, M.; Sugitate, T.; Sullivan, J. P.; Sumi, Y.; Willis, W. J.; Wolf, K. L.; Xu, N.; Zachary, D. S.
    Two-pion correlations from Pb1Pb collisions at 158 GeV/c per nucleon are measured by the NA44 experiment at CERN. Multidimensional fits characterize the emission volume, which is found to be larger than in S-induced ...
  • [2012-05-14] Identified charged hadron production in p+ p collisions at sqrt [s]= 200 and 62.4 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Barnes, P. D.; Boissevain, J. G.; Butsyk, S.; Camacho, C. M.; Constantin, P.; Kapustinsky, J.; Kunde, G. J.; Lee, D. M.; Leitch, M. J.; Liu, M. X.; McGaughey, P. L.; Norman, B. E.; Palounek, A. P. T.; Purwar, A. K.; Sondheim, W. E.; Van Hecke, H. W.; Bassalleck, B.; Haegemann, C.; Malik, M. D.; Rak, J.; Thomas, T. L.; Younus, I.; Al-Bataineh, H.; Armendariz, R.; Kyle, G. S.; Liu, H.; Papavassiliou, V.; Pate, S. F.; Stepanov, M.; Wang, X. R.
    Transverse momentum distributions and yields for π±, K±, p, and p̄ in p+p collisions at √s = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). These data ...
  • [2012-05-14] J/ψ suppression at forward rapidity in Au+ Au collisions at sqrt [s_ {NN}]= 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Brooks, M. L.; Butsyk, S.; Camacho, C. M.; Constantin, P.; Kapustinsky, J.; Kunde, G. J.; Lee, D. M.; Leitch, M. J.; Liu, H.; Liu, M. X.; McGaughey, P. L.; Purwar, A. K.; Sondheim, W. E.; Van Hecke, H. W.; Bassalleck, B.; Kotchetkov, D.; Malik, M. D.; Thomas, T. L.; Younus, I.; Al-Bataineh, H.; Kyle, G. S.; Papavassiliou, V.; Pate, S. F.; Wang, X. R.
    Heavy quarkonia are observed to be suppressed in relativistic heavy-ion collisions relative to their production in p + p collisions scaled by the number of binary collisions. In order to determine if this suppression is ...
  • [2012-05-08] Large CSC chamber for the PHENIX muon detector with ultra thin cathode foils 

    Fields, Douglas E.; Lee, D. M.; Armijo, V.; Atencio, L.; Brooks, M. L.; Clark, D.; Chen, Z.; Dinesh, B. V.; Kinnison, W. W.; Hart, G.; Matousek, H.; Morris, C.; Murray, M. M.; Sondheim, W.; Wang, Y.; Wang, Z.
    The muon tracking system for the PHENIX detector at RHIC uses cathode strip chambers (CSC) for the tracking detectors. These detectors must provide 100 μm resolution per measurement plane to give satisfactory mass resolution ...
  • [2012-05-08] Large, light, high-acceptance CSC chambers for the PHENIX muon detector using a honeycomb panel design 

    Fields, Douglas E.; Armijo, V.; Atencio, L.; Bassalleck, B.; Behrendt, J.; Brooks, M.L.; Clark, D.; Dinesh, B.V.; Klinksiek, S.; Lee, D.M.; Lowe, J.; Sondheim, W.; Stuart, J.; Wang, X.F.
    The muon tracking system for the PHENIX detector uses cathode strip chambers (CSC) for the tracking detectors. These detectors must provide 58 micron resolution at each station to give satisfactory mass resolution of the ...
  • [2012-05-14] Measurements of Higher Order Flow Harmonics in Au+ Au Collisions at sqrt [s_ {NN}]= 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Brooks, M. L.; Butsyk, S.; Camacho, C. M.; Constantin, P.; Kapustinsky, J.; Kunde, G. J.; Lee, D. M.; Leitch, M. J.; Liu, H.; Liu, M. X.; McGaughey, P. L.; Purwar, A. K.; Sondheim, W. E.; Van Hecke, H.W.; Bassalleck, B.; Kotchetkov, D.; Malik, M. D.; Thomas, T. L.; Younus, I.; Al-Bataineh, H.; Kyle, G. S.; Papavassiliou, V.; Pate, S. F.; Wang, X. R.
    Flow coefficients vn for n = 2, 3, 4, characterizing the anisotropic collective flow in Au + Au collisions at square root of S(NN) = 200 GeV, are measured relative to event planes psin, determined at large rapidity. We ...
  • [2011-05-02] Microtubule Gliding Assay [dataset] 

    Maloney, Andy; Koch, Steve
    These data are images of gliding motility assays using kinesin-1 and 29% rhodamine tagged microtubules. Each image was taken with an Andor Luca S EMCCD camera with a gain of 150 and an exposure of 100 ms. A total of 600 ...
  • [2012-05-08] mT Dependence of Boson Interferometry in Heavy Ion Collisions at the CERN SPS 

    Fields, Douglas E.; Beker, H.; Boggild, H.; Boissevain, J.; Cherney, M.; Dodd, J.; Esumi, S.; Fabjan, C.W.; Franz, A.; Hansen, K. H.; Holzer, E.B.; Humanic, T. J.; Jacak, B.V.; Jayanti, R.; Kalechofsky, H.; Kobayashi, T.; Kvatadze, R.; Lee, Y.Y.; Leltchouk, M,; Lorstad, B.; Maeda, N.; Medvedev, A.; Miake, Y.; Miyabayashi, A.; Murray, M.; Nagamiya, S.; Nishimura, S.; Noteboom, E.; Pandey, S.U.; Piuz, F.; Polychronakos, V.; Potekhin, M.; Poulard, G.; Sakaguchi, A.; Sarabura, M.; Shigaki, K.; Simon-Gillo, J.; Sondheim, W.; Sugitate, T.; Sullivan, J. P.; Sumi, Y.; Van Hecke, H.; Willis, W. J.; Wolf, K.; Xu, N.
    First results of the mT dependence of π+π+ and K+K+ correlations from S+Pb collisions at 200 GeV /c per nucleon measured by the focusing spectrometer of the NA44 experiment at CERN are presented. Multidimensional fits ...
  • [2012-05-10] Nuclear-Modification Factor for Open-Heavy-Flavor Production at Forward Rapidity in Cu+ Cu Collisions at sqrt (s_NN)= 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Barnes, P.D.; Boissevain, J.G.; Brooks, M.L.; Butsyk, S.; Constantin, P.; Kunde, G.J.; Lee, D.M.; Leitch, M.J.; Liu, M.X.; McGaughey, P.L.; Norman, B.E.; Palounek, A.P.T.; Purwar, A.K.; Sondheim, W.E.; Van Hecke, H.W.; Bassalleck, B.; Haegemann, C.; Hobbs, R.; Malik, M.D.; Rak, J.; Thomas, T.L.; Younus, I.; Al-Bataineh, H.; Armendariz, R.; Kyle, G.S.; Papavassiliou, V.; Pate, S.F.; Stepanov, M.; Wang, X.R.
    Background: Heavy-flavor production in p+p collisions is a good test of perturbative-quantum- chromodynamics (pQCD) calculations. Modification of heavy-flavor production in heavy-ion collisions relative to binary-collision ...
  • [2012-05-09] Preproduction Silicon Strip-pixel Sensor Testing for the Phenix VTX upgrade 

    Fields, Douglas E.; Hagemann, C.; Hoeferkamp, M.; Malik, M.D.; Turner, J.; Zimmerman, A.
    This document describes in detail the testing performed on some of the preproduction silicon sensors for the Phenix VTX upgrade. The results obtained at the University of New Mexico between May 2005 and March 2006 are ...
  • [2012-05-14] Production of ω mesons in p+ p, d+ Au, Cu+ Cu, and Au+ Au collisions at sqrt [s_ {NN}]= 200 GeV 

    Fields, Douglas E.; PHENIX Collaboration; Barnes, P. D.; Boissevain, J. G.; Brooks, M. L.; Burward-Hoy, J. M.; Butsyk, S.; Camacho, C. M.; Constantin, P.; Grim, G.; Jiang, X.; Kapustinsky, J.; Kunde, G. J.; Lee, D. M.; Leitch, M. J.; Liu, H.; Liu, M. X.; McGaughey, P. L.; Moss, J. M.; Norman, B. E.; Palounek, T.; Purwar, A. K.; Sondheim, W. E.; Sullivan, J. P.; Van Hecke, H. W.; Bassalleck, B.; Haegemann, C.; Hobbs, R.; Kotchetkov, D.; Malik, M. D.; Rak, J.; Thomas, T. L.; Younus, I.; Al-Bataineh, H.; Al-Jamel, A.; Armendariz, R.; Brown, D. S.; Dharmawardane, K. V.; Kyle, G. S.; Papavassiliou, V.; Pate, S. F.; Stepanov, M.; Wang, X. R.
    The PHENIX experiment at the Relativistic Heavy Ion Collider has measured ω meson production via leptonic and hadronic decay channels in p + p, d + Au, Cu + Cu, and Au + Au collisions at √sNN = 200 GeV. The invariant ...
  • [2012-05-08] Proton and Antiproton Distributions at Mid-Rapidity in Proton-Nucleus and Sulphur-Nucleus Collisions 

    Fields, Douglas E.; Bearden, I. G.; Boggild, H.; Boissevain, J.; Dodd, J.; Esumi, S.; Fabjan, C. W.; Franz, A.; Holzer, E. B.; Humanic, T. J.; Jacak, B. V.; Jayanti, R.; Kalechofsky, H.; Lee, Y. Y.; Leltchouk, M.; Lorstad, B.; Maeda, N.; Medvedev, A.; Miyabayashi, A.; Murray, M.; Nishimura, S.; Pandey, S. U.; Piuz, F.; Polychronakos, V.; Potekhin, M.; Poulard, G.; Sakaguchi, A.; Sarabura, M.; Spegel, M.; Simon-Gillo, J.; Sondheim, W.; Sugitate, T.; Sullivan, J. P.; Sumi, Y.; Van Hecke, H.; Willis, W. J.; Wolf, K.; Xu, N.
    Experiment NA44 has measured proton and antiproton distributions at midrapidity in sulphur and proton collisions with nuclear targets at 200 and 450 GeV/c per nucleon respectively. The inverse slopes of transverse mass ...
  • [2012-05-08] Relationship between correlation function fit parameters and source distributions 

    Fields, Douglas E.; Sullivan, J. P.; Simon-Gillo, J.; Van Hecke, H.; Jacak, B. V.; Xu, N.
    We review the method of two-particle intensity interferometry, define appropriate techniques to make the comparison between RQMD source distributions and correlation function fit parameters, and compare these to results ...