91 results on '"D. Fox"'
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2. Observation of an Unusual Upward-Going Cosmic-Ray-like Event in the Third Flight of ANITA
- Author
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P. W. Gorham, B. Rotter, P. Allison, O. Banerjee, L. Batten, J. J. Beatty, K. Bechtol, K. Belov, D. Z. Besson, W. R. Binns, V. Bugaev, P. Cao, C. C. Chen, C. H. Chen, P. Chen, J. M. Clem, A. Connolly, L. Cremonesi, B. Dailey, C. Deaconu, P. F. Dowkontt, B. D. Fox, J. W. H. Gordon, C. Hast, B. Hill, K. Hughes, J. J. Huang, R. Hupe, M. H. Israel, A. Javaid, J. Lam, K. M. Liewer, S. Y. Lin, T. C. Liu, A. Ludwig, L. Macchiarulo, S. Matsuno, C. Miki, K. Mulrey, J. Nam, C. J. Naudet, R. J. Nichol, A. Novikov, E. Oberla, M. Olmedo, R. Prechelt, S. Prohira, B. F. Rauch, J. M. Roberts, A. Romero-Wolf, J. W. Russell, D. Saltzberg, D. Seckel, H. Schoorlemmer, J. Shiao, S. Stafford, J. Stockham, M. Stockham, B. Strutt, G. S. Varner, A. G. Vieregg, S. H. Wang, and S. A. Wissel
- Published
- 2018
- Full Text
- View/download PDF
3. Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA
- Author
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P. W. Gorham, J. Nam, A. Romero-Wolf, S. Hoover, P. Allison, O. Banerjee, J. J. Beatty, K. Belov, D. Z. Besson, W. R. Binns, V. Bugaev, P. Cao, C. Chen, P. Chen, J. M. Clem, A. Connolly, B. Dailey, C. Deaconu, L. Cremonesi, P. F. Dowkontt, M. A. DuVernois, R. C. Field, B. D. Fox, D. Goldstein, J. Gordon, C. Hast, C. L. Hebert, B. Hill, K. Hughes, R. Hupe, M. H. Israel, A. Javaid, J. Kowalski, J. Lam, J. G. Learned, K. M. Liewer, T. C. Liu, J. T. Link, E. Lusczek, S. Matsuno, B. C. Mercurio, C. Miki, P. Miočinović, M. Mottram, K. Mulrey, C. J. Naudet, J. Ng, R. J. Nichol, K. Palladino, B. F. Rauch, K. Reil, J. Roberts, M. Rosen, B. Rotter, J. Russell, L. Ruckman, D. Saltzberg, D. Seckel, H. Schoorlemmer, S. Stafford, J. Stockham, M. Stockham, B. Strutt, K. Tatem, G. S. Varner, A. G. Vieregg, D. Walz, S. A. Wissel, and F. Wu
- Published
- 2016
- Full Text
- View/download PDF
4. Observation of an Unusual Upward-Going Cosmic-Ray-like Event in the Third Flight of ANITA
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Charles J. Naudet, L. Batten, Tsung-Che Liu, S. Y. Lin, B. Strutt, David Saltzberg, R. J. Nichol, Eric Oberla, Peter Gorham, Paul Dowkontt, J. Roberts, S. H. Wang, Pisin Chen, P. Cao, Cosmin Deaconu, A. Javaid, Konstantin Belov, S. Matsuno, J. J. Beatty, L. Cremonesi, S. Prohira, J. W. H. Gordon, J. W. Russell, J. J. Huang, A. Novikov, Keith Bechtol, B. Dailey, Abigail G. Vieregg, Andrew Ludwig, Harm Schoorlemmer, J. M. Clem, R. Prechelt, S. Stafford, D. Seckel, Luca Macchiarulo, Stephanie Wissel, Andres Romero-Wolf, J. Stockham, Jiwoo Nam, K. Hughes, W. R. Binns, O. Banerjee, B. Rotter, C. Hast, C. Miki, Berkeley Hill, Patrick Allison, B. D. Fox, C. C. Chen, Chun Hsiung Chen, D. Z. Besson, K. Mulrey, V. Bugaev, M. Olmedo, G. S. Varner, M. Stockham, Brian Rauch, J. Shiao, M. H. Israel, Joe Lam, R. Hupe, Kurt Liewer, and Amy Connolly
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High Energy Astrophysical Phenomena (astro-ph.HE) ,Physics ,010308 nuclear & particles physics ,Astrophysics::High Energy Astrophysical Phenomena ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,General Physics and Astronomy ,Flux ,Cosmic ray ,Astrophysics ,01 natural sciences ,Standard Model ,Air shower ,0103 physical sciences ,High Energy Physics::Experiment ,Neutrino ,Astrophysics - High Energy Astrophysical Phenomena ,010306 general physics ,Event (particle physics) ,Charged current ,Lepton - Abstract
We report on an upward traveling, radio-detected cosmic-ray-like impulsive event with characteristics closely matching an extensive air shower. This event, observed in the third flight of the Antarctic Impulsive Transient Antenna (ANITA), a NASA-sponsored long-duration balloon payload, is consistent with a similar event reported in a previous flight. These events may be produced by the atmospheric decay of an upward-propagating $\tau$-lepton produced by a $\nu_{\tau}$ interaction, although their relatively steep arrival angles create tension with the standard model (SM) neutrino cross section. Each of the two events have $a~posteriori$ background estimates of $\lesssim 10^{-2}$ events. If these are generated by $\tau$-lepton decay, then either the charged-current $\nu_{\tau}$ cross section is suppressed at EeV energies, or the events arise at moments when the peak flux of a transient neutrino source was much larger than the typical expected cosmogenic background neutrinos., Comment: 5 pages, 4 figures. Supplemental material available from corresponding author by request
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- 2018
5. Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA
- Author
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R. Hupe, Joshua A. Gordon, J. Lam, Patrick Allison, Konstantin Belov, D.R. Walz, B. Dailey, R. J. Nichol, C. L. Hebert, P. F. Dowkontt, J. Kowalski, D. Z. Besson, J. Stockham, Andres Romero-Wolf, John G. Learned, Pisin Chen, M. Mottram, G. S. Varner, D. Goldstein, K. J. Palladino, C. J. Naudet, S. Matsuno, J. M. Clem, B. Rotter, Cosmin Deaconu, B. C. Mercurio, J. T. Link, Elizabeth R Lusczek, J. J. Beatty, Amy Connolly, Tsung-Che Liu, L. L. Ruckman, B. D. Fox, Michael DuVernois, Peter Gorham, Harm Schoorlemmer, P. Cao, K. Mulrey, K. M. Liewer, L. Cremonesi, Chiang-Mei Chen, S. Hoover, J. W. Russell, M. Stockham, Stephanie Wissel, David Saltzberg, Abigail G. Vieregg, D. Seckel, B. Strutt, P. Miočinović, Jiwoo Nam, K. Hughes, R. C. Field, Johnny S. T. Ng, F. Wu, W. R. Binns, O. Banerjee, M. Rosen, A. Javaid, C. Hast, Brian Rauch, C. Miki, B. Hill, S. Stafford, M. H. Israel, Kevin Reil, J. Roberts, K. Tatem, and V. Bugaev
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High Energy Astrophysical Phenomena (astro-ph.HE) ,Meteorology ,010308 nuclear & particles physics ,0103 physical sciences ,General Physics and Astronomy ,FOS: Physical sciences ,Cosmic ray ,Astrophysics ,010306 general physics ,Astrophysics - High Energy Astrophysical Phenomena ,01 natural sciences ,Event (particle physics) ,Geology - Abstract
We report on four radio-detected cosmic-ray (CR) or CR-like events observed with the Antarctic Impulsive Transient Antenna (ANITA), a NASA-sponsored long-duration balloon payload. Two of the four were previously identified as stratospheric CR air showers during the ANITA-I flight. A third stratospheric CR was detected during the ANITA-II flight. Here we report on characteristics these three unusual CR events, which develop nearly horizontally, 20-30~km above the surface of the Earth. In addition, we report on a fourth steeply upward-pointing ANITA-I CR-like radio event which has characteristics consistent with a primary that emerged from the surface of the ice. This suggests a possible $\tau$-lepton decay as the origin of this event, but such an interpretation would require significant suppression of the Standard Model ${\tau}$-neutrino cross section., Comment: 5pp,4 figures, referees' comments addressed, this version accepted to Phys. Rev. Letters. Supplemental PDF material available; see source files
- Published
- 2016
6. Evidence for a Three-Nucleon-Force Effect in Proton-Deuteron Elastic Scattering
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W. Nagengast, Jacek Golak, B. R. Owen, R. V. Cadman, Klaus Rith, B. D. Fox, H. Witała, F. Schmidt, J. Wilbert, Andreas Nogga, M. A. Miller, C. Grosshauser, R. J. Holt, C. E. Jones, Ra'anan Tobey, E. R. Kinney, W. Glöckle, E. Schulte, W. J. Cummings, E. L. Thorsland, J. Sowinski, Hiroyuki Kamada, J.A. Fedchak, Haiyan Gao, Jeffrey Brack, and F. Sperisen
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Physics ,Elastic scattering ,Proton ,Scattering ,Nuclear Theory ,FOS: Physical sciences ,General Physics and Astronomy ,Observable ,Particle accelerator ,Polarization (waves) ,law.invention ,Nuclear physics ,Deuterium ,law ,Nuclear Experiment (nucl-ex) ,Atomic physics ,Nuclear Experiment ,Nucleon - Abstract
Developments in spin-polarized internal targets for storage rings have permitted measurements of 197 MeV polarized protons scattering from vector polarized deuterons. This work presents measurements of the polarization observables A_y, iT_11, and C_y,y in proton-deuteron elastic scattering. When compared to calculations with and without three-nucleon forces, the measurements indicate that three-nucleon forces make a significant contribution to the observables. This work indicates that three-body forces derived from static nuclear properties appear to be crucial to the description of dynamical properties., 8 pages 2 figures Latex, submitted to Phys. Rev. Letters
- Published
- 2001
7. Ground-State Band and Deformation of theZ=102IsotopeN254o
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W. Korten, W. F. Henning, P. Reiter, Paul Greenlees, M. Leino, A. J. Chewter, J. D. Fox, M. P. Carpenter, Iftikhar Ahmad, D. Seweryniak, R. V. F. Janssens, D. Sullivan, I. Wiedenhöver, John P. Greene, C. N. Davids, T. L. Khoo, R.-D. Herzberg, Kai Vetter, P. A. Butler, Jolie Cizewski, N. Amzal, G. D. Jones, M. Alcorta, Sunniva Siem, C. J. Lister, Juha Uusitalo, T. Lauritsen, G. Gervais, K. Y. Ding, N. Fotiades, and A. A. Sonzogni
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Physics ,Isotope ,Fission ,Band gap ,Nuclear Theory ,Quadrupole ,General Physics and Astronomy ,Atomic physics ,Deformation (meteorology) ,Ground state ,Energy (signal processing) ,Spin-½ - Abstract
The ground-state band of the Z=102 isotope {sup 254}No has been identified up to spin 14, indicating that the nucleus is deformed. The deduced quadrupole deformation, {beta}=0.27 , is in agreement with theoretical predictions. These observations confirm that the shell-correction energy responsible for the stability of transfermium nuclei is partly derived from deformation. The survival of {sup 254}No up to spin 14 means that its fission barrier persists at least up to that spin. {copyright} {ital 1999} {ital The American Physical Society }
- Published
- 1999
8. Beam-induced nuclear depolarization in a gaseous polarized-hydrogen target
- Author
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Yasuhiro Sakemi, Valeri Valentinovitch Mitsyn, R. P. Redwine, G. van der Steenhoven, J. van Hunen, L. G. Greeniaus, A. Gute, L. H. Kramer, E. Volk, P. Chumney, S. Frullani, H. Schmitt, F. Stock, Ross Milner, T. A. Shibata, E. De Sanctis, R.O. Avakian, A. Metz, N. Koch, J. Franz, H. Kolster, M.-A. Funk, J.-O. Hansen, A.O. Mateos, A. Borissov, B. D. Fox, E. Devitsin, E. Cisbani, S. Potashov, H. Zohrabian, A. R. Reolon, A. Avetissian, K. McIlhany, I.A. Savin, K. Sinram, R. J. Holt, A. Izotov, T. Wise, F. Masoli, F. Neunreither, J. Blouw, S. Bernreuther, Alan M. Nathan, G.R. Court, F. Schmidt, R. V. Cadman, V. A. Korotkov, N.D. Gagunashvili, Y. Gärber, M. Beckmann, M. McAndrew, G. S. Kyle, H. J. Bulten, Michael Pitt, J. F. J. van den Brand, Th. Henkes, J. Stewart, V. Gharibyan, W. Haeberli, S. Frabetti, A. Brull, Brons, M. Ferstl, M. Sutter, M. Amarian, K. Ackerstaff, Klaus Rith, Robert Henderson, E. R. Kinney, Wolfgang Korsch, A. Reali, E. E. W. Bruins, H. Avakian, A. Airapetian, W. Wander, A. Dvoredsky, A. Nagaitsev, E. C. Aschenauer, H. E. Jackson, V. G. Krivokhijine, K. Königsmann, O. Häusser, G. P. Capitani, Y. Naryshkin, H. Ihssen, Michel Vetterli, M. Kolstein, Haiyan Gao, O. Grebeniouk, Ralf Hertenberger, M. Ruh, A. Schwind, A. Simon, F. K. Martens, M. Nupieri, G. Elbakian, W. Brückner, C. Baumgarten, M. Spengos, P. Di Nezza, S. Brauksiepe, N. Akopov, Michael Tytgat, V. Giordjian, A. Golendukhin, S. I. Manaenkov, M. A. Miller, G. Rakness, M. Henoch, P. Geiger, P. Slavich, V. A. Kozlov, S. Taroian, F. Meissner, P. Rossi, W. Lachnit, D. De Schepper, C. Grosshauser, R. A. Ristinen, Y. Holler, Alessandra Fantoni, N. Meyners, B. R. Owen, H.O. Roloff, P. F. Dalpiaz, G. Graw, D. Hasch, D. H. Potterveld, K. Zapfe-Düren, H. Böttcher, S. F. Pate, Jeffrey Brack, B. W. Filippone, F. Garibaldi, J. Stenger, D. Fick, J. E. Belz, R. D. McKeown, P.K.A. de Witt Huberts, M. Niczyporuk, A. Jgoun, Mauro Iodice, V. Papavassiliou, Belostotski, S. Yoneyama, R. Van de Vyver, G. M. Urciuoli, W.-D. Nowak, H. Ogami, T. Shin, Manuella Vincter, A. Kisselev, H. Tallini, Wolfgang Lorenzon, W. Hoprich, U. Stoesslein, H. Fischer, J. W. Martin, S. Rudnitsky, Dirk Ryckbosch, J. Sowinski, B. Tipton, Hiroaki Kobayashi, K. Fiedler, K. Woller, Thomas O'Neill, P.W. Green, B. Braun, K. P. Schüler, Nicola Bianchi, O. Mikloukho, V. Shutov, B. Bains, C. Simani, Naomi C R Makins, R. Mozzetti, Ralf Kaiser, E. Steffens, G. Gavrilov, A. Fechtchenko, B. Bray, P. Kitching, Th. Benisch, M. Düren, P. Carter, C. A. Miller, Adel Terkulov, Valeria Muccifora, G. Schnell, S. E. Williamson, and (Astro)-Particles Physics
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HERMES experiment ,Physics ,Hydrogen ,General Physics and Astronomy ,chemistry.chemical_element ,FOS: Physical sciences ,DESY ,Depolarization ,HERA ,Magnetic field ,High Energy Physics - Experiment ,NO ,High Energy Physics - Experiment (hep-ex) ,Bunches ,chemistry ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Atomic physics ,Beam (structure) - Abstract
Spin-polarised atomic hydrogen is used as a gaseous polarised proton target in high energy and nuclear physics experiments operating with internal beams in storage rings. When such beams are intense and bunched, this type of target can be depolarised by a resonant interaction with the transient magnetic field generated by the beam bunches. This effect has been studied with the HERA positron beam in the HERMES experiment at DESY. Resonances have been observed and a simple analytic model has been used to explain their shape and position. Operating conditions for the experiment have been found where there is no significant target depolarisation due to this effect., REVTEX, 6 pages, 5 figures
- Published
- 1999
9. Search for Monoenergetic Positron Emission from Heavy-Ion Collisions at Coulomb-Barrier Energies
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I. Ahmad, Sam M. Austin, B. B. Back, R. R. Betts, F. P. Calaprice, K. C. Chan, A. Chishti, C. Conner, R. W. Dunford, J. D. Fox, S. J. Freedman, M. Freer, S. B. Gazes, A. L. Hallin, T. Happ, D. Henderson, N. I. Kaloskamis, E. Kashy, W. Kutschera, J. Last, C. J. Lister, M. Liu, M. R. Maier, D. J. Mercer, D. Mikolas, P. A. A. Perera, M. D. Rhein, D. E. Roa, J. P. Schiffer, T. A. Trainor, P. Wilt, J. S. Winfield, M. R. Wolanski, F. L. H. Wolfs, A. H. Wuosmaa, G. Xu, A. Young, and J. E. Yurkon
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Physics ,Positron ,Transition radiation ,Excited state ,General Physics and Astronomy ,Coulomb barrier ,Production (computer science) ,Electron ,Positron emission ,Atomic physics ,Spectral line - Abstract
Positron production in {sup 238}U+{sup 232}Th and {sup 238}U+{sup 181}Ta collisions near the Coulomb barrier has been studied. Earlier experiments reported narrow lines in the spectra of positrons, accumulated without the requirement of electrons detected in coincidence. No evidence of such structure is observed in the present data. The positron energy spectra are compared with estimates from dynamic atomic processes, and from internal pair conversion of electromagnetic transitions from the excited nuclei. {copyright} {ital 1997} {ital The American Physical Society}
- Published
- 1997
10. Search for Narrow Sum-Energy Lines in Electron-Positron Pair Emission from Heavy-Ion Collisions near the Coulomb Barrier
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I. Ahmad, S. M. Austin, B. B. Back, R. R. Betts, F. P. Calaprice, K. C. Chan, A. Chishti, P. Chowdhury, C. Conner, R. W. Dunford, J. D. Fox, S. J. Freedman, M. Freer, S. B. Gazes, A. L. Hallin, T. Happ, D. Henderson, N. I. Kaloskamis, E. Kashy, W. Kutschera, J. Last, C. J. Lister, M. Liu, M. R. Maier, D. J. Mercer, D. Mikolas, P. A. A. Perera, M. D. Rhein, D. E. Roa, J. P. Schiffer, T. A. Trainor, P. Wilt, J. S. Winfield, M. Wolanski, F. L. H. Wolfs, A. H. Wuosmaa, G. Xu, A. Young, and J. E. Yurkon
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Physics ,Positron ,Pair production ,General Physics and Astronomy ,Coulomb barrier ,Electron ,Atomic physics ,Neutral particle ,Spectral line ,Energy (signal processing) ,Ion - Abstract
The first results are presented from a new experiment, APEX, designed to study the previously reported sharp lines in sum-energy spectra of positrons and electrons produced in collisions of very heavy ions. Data were collected for {sup 238}U+{sup 181}Ta at 5.95, 6.10, and 6.30 MeV/u and {sup 238}U+{sup 232}Th at 5.95 MeV/u. In none of our analyses is any evidence found for sharp sum-energy lines. For the specific case of the isolated decay of a neutral particle of mass 1.4--2.1 MeV/{ital c}{sup 2}, the upper limits on cross sections obtained from the present data are significantly less than the previously reported cross sections.
- Published
- 1995
11. Assessing the Evolutionary Nature of Multifragment Decay
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W. A. Friedman, D. R. Bowman, E. Cornell, J. D. Dinius, Graham F. Peaslee, L. G. Sobotka, C. Williams, D. O. Handzy, M. B. Tsang, W. C. Hsi, R. T. de Souza, G. VanBuren, R. J. Charity, C. K. Gelbke, Y. Lou, L. Phair, M. J. Huang, C. Schwarz, M. A. Lisa, W. G. Lynch, T.M. Hamilton, D. Fox, and T. Glasmacher
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Physics ,Nuclear physics ,Correlation function (statistical mechanics) ,Coulomb ,General Physics and Astronomy ,Statistical model ,Context (language use) ,Atomic physics ,Nuclear Experiment ,Radioactive decay - Abstract
Multifragment decays of central collisions in 84Kr + 197Au at E/A = 35, 55, and 70 MeV are studied. The dependence of the extracted emission time on the velocity of the fragment pair is investigated. More energetic pairs manifest a stronger Coulomb interaction indicating emission from a source of smaller spatial-temporal extent than less-energetic pairs. This trend can be understood in the context of a statistical model which allows the source characteristics to evolve as the fragments are emitted.
- Published
- 1995
12. Antiproton production in relativistic Si-nucleus collisions
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B. Hong, F. S. Rotondo, Nu Xu, J. T. Mitchell, N. C. da Silva, D. Lissauer, M.K. Fatyga, D. Makowiecki, C. Zou, C. Winter, Claude Andre Pruneau, Helio Takai, Z. Zhang, Senta Greene, B. S. Kumar, Johanna Stachel, T. G. Throwe, D. Fox, E. O'Brien, G. E. Diebold, Thomas Michael Cormier, L. Waters, J. V. Germani, M. Muthuswamy, J. Simon-Gillo, E. Duek, E. M. Takagui, K.L. Wolf, D. Wolfe, R. Lacasse, N. Herrmann, R. D. Majka, K. Jayananda, J. Sandweiss, C. L. Woody, S. K. Mark, W. E. Cleland, D. Kraus, G. David, J. Barrette, T. W. Ludlam, Yi Zhang, J. Slaughter, T. K. Hemmick, Upul Sonnadara, Peter Braun-Munzinger, R. Bellwied, G. Dadusc, J. Dee, R. W. Hogue, O. Dietzsch, J. R. Hall, and W. J. Llope
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Nuclear reaction ,Physics ,Antiparticle ,Particle physics ,Nuclear Theory ,Hadron ,General Physics and Astronomy ,Charged particle ,Baryon ,Nuclear physics ,Antiproton ,Antimatter ,High Energy Physics::Experiment ,Nuclear Experiment ,Nucleon - Abstract
We have measured antiproton production cross sections as functions of centrality in collisions of 14.6 GeV/[ital c] per nucleon [sup 28]Si ions with targets of Al, Cu, and Pb. For all targets, the antiproton yields increase linearly with the number of projectile nucleons that have interacted, and show little target dependence. We discuss the implications of this result on the production and absorption of antiprotons within the nuclear medium.
- Published
- 1993
13. Extraordinarily slow nuclear spin relaxation in frozen laser-polarizedXe129
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M. Gatzke, D. Fox, Brian Saam, William Happer, Gordon D. Cates, and Bastiaan Driehuys
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Physics ,Condensed matter physics ,Relaxation (NMR) ,Spin–lattice relaxation ,General Physics and Astronomy ,Nuclear magnetic resonance spectroscopy ,Spin–orbit interaction ,Magnetic field ,symbols.namesake ,Lattice (order) ,Kinetic isotope effect ,symbols ,Atomic physics ,Raman spectroscopy - Abstract
We studied the very slow nuclear spin-lattice relaxation of solid $^{129}\mathrm{Xe}$ as a function of temperature and magnetic field using laser-polarized nuclei. Relaxation times in excess of 500 h were measured. We present evidence for a new relaxation mechanism which results from a Raman spin-phonon scattering process involving the spin-rotation interaction. We also establish the existence of cross relaxation between $^{129}\mathrm{Xe}$ and the other magnetic isotope $^{131}\mathrm{Xe}$ and demonstrate that laser-polarized $^{129}\mathrm{Xe}$ can be used to cross polarize other nuclei that are present in the lattice.
- Published
- 1993
14. Limits on a muon flux from neutralino annihilations in the sun with the IceCube 22-string detector
- Author
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E. Blaufuss, Jenni Adams, A. Schukraft, K. Laihem, J.-P. Hülß, S. Hickford, R. G. Stokstad, M. C. Stoufer, S. Schlenstedt, H. S. Matis, Dirk Ryckbosch, D. Rutledge, R. Wischnewski, H. Leich, D. Turcan, S. M. Movit, Francis Halzen, O. Fadiran, P. Berghaus, Christopher Wiebusch, J. W. Nam, S. Euler, J. Petrovic, M. V. D'Agostino, Albrecht Karle, R. M. Gunasingha, D. R. Nygren, K. Rawlins, Damian Pieloth, D. Hubert, James Madsen, Jon Dumm, M. Prikockis, T. Waldenmaier, Teresa Montaruli, C. Pérez de los Heros, John Heise, M. R. Duvoort, S. Odrowski, Marek Kowalski, P. Roth, J. J. Beatty, A. Piegsa, H. Landsman, M. Krasberg, Joanna Kiryluk, Karen Andeen, Todor Stanev, C. Wendt, A. Wiedemann, Christian Bohm, K. Hoshina, Glenn Spiczak, M. Danninger, C. T. Day, David A. Schneider, M. Olivo, J. A. Goodman, L. Köpke, A. Slipak, S. Tilav, F. Descamps, D. Breder, H. Miyamoto, K. Meagher, Reina H. Maruyama, N. Milke, George Japaridze, D. Berley, G. C. Hill, E. A. Strahler, M. Schunck, K. Mase, T. Kowarik, S. Yoshida, W. R. Edwards, Y. Hasegawa, A. Mohr, Laura C. Bradley, Spencer Klein, Michael J. Baker, S. J. Patton, K. H. Becker, R. Franke, O. Depaepe, M. Tluczykont, L. Gladstone, P. Nießen, R. Nahnhauer, G. Wikström, T. Griesel, B. Voigt, S. Stoyanov, O. Engdegård, C. Walck, A. Lucke, P. B. Price, Peter Mészáros, A. R. Fazely, Tyce DeYoung, Thomas K. Gaisser, G. B. Yodh, Kara Hoffman, Y. Sestayo, P. A. Toale, S. Grullon, R. Gozzini, Xinhua Bai, John Clem, T. Straszheim, K. Kuehn, S. Seunarine, M. Stamatikos, Carsten Rott, J. Lünemann, D. J. Boersma, R. C. Bay, Juan Carlos Diaz-Velez, Q. Swillens, S. Panknin, Fabian Kislat, A. Tepe, J. L. Kelley, Markus Ahlers, Ph. Herquet, Kael Hanson, C. P. McParland, G. Stephens, S. Westerhoff, O. Tarasova, T. O. B. Schmidt, M. Bissok, Dirk Lennarz, D. Z. Besson, A. Van Overloop, E. Middell, Karl-Heinz Sulanke, K. Beattie, Wolfgang Rhode, R. Porrata, S. Böser, A. Goldschmidt, Xianwu Xu, Kurt Woschnagg, O. Schulz, C. Roucelle, Elisa Bernardini, R. L. Imlay, Christian Spiering, Konstancja Satalecka, Paul Evenson, M. Ono, S. Knops, Justin Vandenbroucke, Elisa Resconi, Samvel Ter-Antonyan, K. Münich, W. Huelsnitz, J. L. Bazo Alba, Paolo Desiati, J. P. Rodrigues, J. Berdermann, M. Ribordy, S. Bechet, K. Helbing, H. G. Sander, T. Stezelberger, S. Hussain, Chad Finley, D. Bertrand, Dmitry Chirkin, J. K. Becker, T. Feusels, S. Klepser, T. Castermans, Alexander Kappes, J. E. Jacobsen, F. Rothmaier, P. Redl, Rasha Abbasi, L. Gerhardt, R. J. Lauer, C. Ha, K. Hultqvist, Darren Grant, M. M. Foerster, A. Silvestri, Timo Karg, Nathan Whitehorn, I. Taboada, Aya Ishihara, J. Auffenberg, C. De Clercq, T. Burgess, J. Dreyer, J. C. Gallagher, Y. Abdou, S.J. Lafebre, M. L. Benabderrahmane, G. W. Sullivan, James E. Braun, M. Gurtner, David A. Williams, Markus Ackermann, Allan Hallgren, S. W. Barwick, Johan Lundberg, Pratik Majumdar, B. D. Fox, R. Ehrlich, Paraic A. Kenny, Takao Kuwabara, B. Christy, Seth M. Cohen, D. Seckel, J. Bolmont, Karl-Heinz Kampert, R. Ganugapati, A. C. Pohl, Kirill Filimonov, A. Olivas, D. F. Cowen, J. M. Joseph, R. Morse, Subir Sarkar, P. O. Hulth, J. Eisch, G. de Vries-Uiterweerd, B. Semburg, C. Terranova, M. Merck, M. Walter, A. Rizzo, H. Wissing, L. Demirörs, R. W. Ellsworth, S. H. Seo, Hermann Kolanoski, M. Labare, K. Han, Axel Groß, Olga Botner, Henrik J. Johansson, Anna Franckowiak, N. Potthoff, G. Kohnen, D. Tosi, N. van Eijndhoven, Gerald Przybylski, and M. Inaba
- Subjects
Particle physics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Physics::Instrumentation and Detectors ,Dark matter ,FOS: Physical sciences ,General Physics and Astronomy ,01 natural sciences ,7. Clean energy ,Nuclear physics ,WIMP ,0103 physical sciences ,ddc:550 ,010306 general physics ,Neutrino oscillation ,Neutrino Telescope ,High Energy Astrophysical Phenomena (astro-ph.HE) ,Physics ,Muon ,Annihilation ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Neutrino detector ,13. Climate action ,Neutralino ,High Energy Physics::Experiment ,Neutrino ,Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
A search for muon neutrinos from neutralino annihilations in the Sun has been performed with the IceCube 22-string neutrino detector using data collected in 104.3 days of live-time in 2007. No excess over the expected atmospheric background has been observed. Upper limits have been obtained on the annihilation rate of captured neutralinos in the Sun and converted to limits on the WIMP-proton cross-sections for WIMP masses in the range 250 - 5000 GeV. These results are the most stringent limits to date on neutralino annihilation in the Sun., 5 pages, 4 figures. Accepted for publication in Phys. Rev. Lett
- Published
- 2009
15. Single-Transverse-Spin Asymmetries of Identified Charged Hadrons in PolarizedppCollisions ats=62.4 GeV
- Author
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D. R. Beavis, Stephen Sanders, K. Hagel, R. R. Debbe, Z. Majka, N. Katrynska, E. B. Johnson, Ian Gardner Bearden, A. Qviler, C. Chasman, R. Wada, B. Budick, Borge Svane Nielsen, E. J. Kim, R. Karabowicz, Dieter Røhrich, Calin Besliu, Jongmin Lee, P. Staszel, H. Yang, Alexandru Jipa, Ionut Cristian Arsene, Michael Murray, Catalin-Lucian Ristea, Trine Spedstad Tveter, B. D. Fox, S. Bekele, J. B. Natowitz, F. Videbæk, J. J. Gaardhøje, Gunnar Løvhøiden, Hans Hjersing Dalsgaard, C. Nygaard, D. Pal, H. Bøggild, and T. M. Larsen
- Subjects
Quark ,Physics ,Quantum chromodynamics ,Particle physics ,Valence (chemistry) ,Proton ,media_common.quotation_subject ,Hadron ,General Physics and Astronomy ,Asymmetry ,Nuclear physics ,Transverse plane ,Pion ,High Energy Physics::Experiment ,Nuclear Experiment ,media_common - Abstract
The first measurements of $x_F$-dependent single spin asymmetries of identified charged hadrons, $\pi^{\pm}$, $K^{\pm}$, and protons, from transversely polarized proton-proton collisions at 62.4 GeV at RHIC are presented. The measurements extend to high-$x_F$ ($|x_F|\sim 0.6$) in both the forward and backward directions.Large asymmetries are seen in the pion and kaon channels. The asymmetries in inclusive $\pi^{+}$ production, $A_N(\pi^+)$, increase with $x_F$ from 0 to $\sim$0.25 %at $x_F = 0.6$ and $A_N(\pi^{-})$ decrease from 0 to $\sim$$-$0.4. Even though $K^-$ contains no valence quarks, observed asymmetries for $K^-$ unexpectedly show positive values similar to those for $K^+$, increasing with $x_F$, whereas proton asymmetries are consistent with zero over the measured kinematic range. Comparisons of the data with predictions of QCD-based models are presented. The flavor dependent single spin asymmetry measurements of identified hadrons allow for stringent tests of theoretical models of partonic dynamics in the RHIC energy regime.
- Published
- 2008
16. System Size and Energy Dependence of Jet-Induced Hadron Pair Correlation Shapes inCu+CuandAu+AuCollisions atsNN=200and 62.4 GeV
- Author
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A. Shevel, H. Pei, Robert F. Hobbs, S. Belikov, K. S. Joo, I. V. Sourikova, H. Torii, Debashish Pal, P. Tarján, Sean A. Kelly, M. A. Volkov, S. Takagi, H. J. Kim, S. Sawada, J. Ying, A. Franz, M. Ouchida, L. Tomášek, J. Asai, K. O. Eyser, V. S. Pantuev, Viktor Veszpremi, I. Ravinovich, A. G. Hansen, Shingo Sakai, B. Espagnon, S. Y. Fung, M. Harvey, K. Fujiwara, K. N. Barish, R. S. Towell, I. Tserruya, T. L. Thomas, C. A. Ogilvie, Y. Nagata, Ryugo S. Hayano, Y. Riabov, T. K. Hemmick, D. Sharma, Kenta Shigaki, M. Nguyen, A. S. Nyanin, Yu. Efremenko, Maya Hachiya Shimomura, V. Singh, Yasuo Miake, I. Garishvili, Akio Kiyomichi, Junji Tojo, S. F. Pate, Tae-Yeon Lee, Martin Purschke, F. Gastineau, N. N. Ajitanand, Hiroaki Ohnishi, B. D. Fox, Mate Csanad, J. L. Charvet, S. S. Ryu, Y. I. Makdisi, Anne Marie Sickles, G. B. Kim, T. J. Uam, Senta Greene, K. Okada, H. Al-Bataineh, X. R. Wang, J. G. Boissevain, S. Esumi, M. B. Deaton, N. Kurihara, E. J. Desmond, L. Kochenda, Jean-Pierre Cussonneau, Masashi Kaneta, John Hill, K. Oyama, Steven E. Skutnik, D. Kotchetkov, M. L. Brooks, F. Matathias, M. Togawa, B. Sahlmueller, H. En'yo, J. M. Qualls, P. Constantin, M. J. Leitch, B. E. Norman, Takahiro Nakamura, E. H. Kim, K. Katou, Toru Sugitate, A. Morreale, M. J. Tannenbaum, B. Love, Kensuke Homma, T. Kawagishi, Marie Germain, E. O'Brien, Z. Fraenkel, M. Naglis, V. V. Ikonnikov, G. R. Young, V. Papavassiliou, C. L. Silva, T. E. Miller, D. Mukhopadhyay, Sébastien Gadrat, S. Rembeczki, David D'Enterria, R. K. Choudhury, A. G. Litvinenko, C. Silvestre, Hirohiko Sato, D. Bucher, J. Park, Florian Bauer, R. A. Soltz, Susumu Oda, O. Dietzsch, H. Valle, M. G. Hur, C. Y. Chi, Y. Tanaka, T. K. Shea, E. T. Atomssa, C. Pinkenburg, D. Y.-U. Peressounko, R. Pak, S. K. Tuli, T. Shohjoh, R. Santo, A. Durum, S. C. Johnson, S. Chernichenko, Masayasu Ishihara, B. Azmoun, A. Král, Dipanwita Dutta, M. J. Kweon, H. Lim, B. Bassalleck, Ferenc Deák, M. Grosse Perdekamp, N. Kamihara, Jan Rak, J. M. Burward-Hoy, M. Stepanov, G. Roche, R. Armendariz, A. Kozlov, R. Seto, K. Haruna, C. H. Kuberg, J. Chiba, G. C. Mishra, W. A. Zajc, Takao Sakaguchi, V. Baublis, A. Denisov, V. Cianciolo, Xiao-yan Li, R. Bennett, Xingguo Li, Ahmed Al-Jamel, M. Finger, Susumu Sato, C. Klein-Boesing, H. Qu, J. E. Frantz, M. Gonin, P. Chung, R. P. Pisani, Y. Tsuchimoto, L. Baksay, K. Das, M. Mitrovski, R. Granier de Cassagnac, A. Adare, V.N. Penev, M. Muniruzzaman, A. D. Frawley, F. Staley, T. Tabaru, Sergey Fokin, Y. L. Yamaguchi, B. Komkov, Herve Borel, D. Lynch, Y. Le Bornec, A. Deshpande, D. S. Brown, Julia Velkovska, M. Rosati, M. Konno, M. Oka, A. Pierson, Kazuyoshi Kurita, A. Drees, V. Dzhordzhadze, X. He, O. O. Omiwade, M. Velkovsky, E. P. Hartouni, J. Kubart, J. Gosset, J. P. Sullivan, W. C. Smith, L. Sanfratello, I. E. Yushmanov, Nikolay Tyurin, Alexander Milov, S. H. Aronson, I. Nakagawa, M. Wysocki, Norio Saito, M. A. L. Leite, H. Pereira, M. Inuzuka, Hideki Hamagaki, K. Aoki, A. Glenn, M. Holmes, W. S. Emam, G. David, C. P. Singh, T. Horaguchi, A. Hoover, M. K. Lee, K. Ozawa, J. T. Mitchell, B. M. Johnson, A. Dion, V. Peresedov, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, David Olle Rickard Silvermyr, Charles Maguire, S. Leckey, R. Kohara, W. Holzmann, O. Drapier, Frank Ellinghaus, M. N. Wagner, Atsushi Taketani, R. Seidl, A. Enokizono, D. E. Fields, Vladislav Manko, A. Kiss, V. Babintsev, J. Egdemir, A. A. Vinogradov, Henrik Tydesjö, D. Winter, Josh Moss, R. Vértesi, Jason Kamin, K. S. Sim, S. S. Adler, E. R. Kinney, D. P. Morrison, B. V. Jacak, V. L. Rykov, T. Dahms, J. L. Drachenberg, S. Campbell, G. S. Kyle, M. Chiu, Ajit Kumar Mohanty, N. Willis, A. Isupov, C. Suire, M. Slunečka, Z. Yasin, Henner Buesching, James Alexander, Y. Watanabe, R. Averbeck, S. P. Sorensen, Jiangyong Jia, Y. Goto, S. P. Stoll, S. Batsouli, T. A. Shibata, Y. Kwon, Byung-Sik Hong, A. Bazilevsky, I. Younus, H. Masui, A. K. Dubey, C. L. Woody, W. C. Chang, T. Hester, J. Sziklai, V. E. Semenov, H. Hiejima, J. Zimányi, Dylan Walker, Philippe Rosnet, Alexandre Lebedev, M. McCumber, A. K. Purwar, E. Kistenev, Tatsuya Chujo, C. R. Cleven, C. Haegemann, Y. Inoue, D. M. Lee, Xiaopeng Zong, K. Dehmelt, A. A. Bickley, A. Soldatov, D. Kawall, S. S.E. Rosendahl, G. Bunce, K. Tanida, Roy A. Lacey, Brian Cole, S. Yokkaichi, Rushan Han, M. N. Hagiwara, Jen-Chieh Peng, J. G. Lajoie, J. M. Heuser, T. Hachiya, K. Imai, V. I. Kochetkov, O. Zaudtke, X. Camard, P. Chand, Marcus Hohlmann, S. Butsyk, A. Churyn, P. J. Kroon, Dong-Hun Kim, I. J. Choi, A. Kravitz, M. Virius, J. Murata, Vladimir Samsonov, C. Vale, D. Jouan, Y. J. Mao, I. Otterlund, S. Kametani, Gerd Joachim Kunde, B. S. Chang, L. Aphecetche, H. Harada, Takeo Kawabata, I. Shein, H. W. Vanhecke, Christine Angela Aidala, Ch. Finck, Jason Newby, J. Klay, Pàl Hidas, Saskia Mioduszewski, V-N. Tram, D. Isenhower, J. H. Kang, A. Toia, Dong Jo Kim, L. Mašek, Osamu Jinnouchi, H. Kobayashi, J. S. Haggerty, Y. Nakamiya, M. C. McCain, N. Grau, Alberto Baldisseri, A. Romana, K. Shoji, S. Bathe, Agneta Oskarsson, Tamas Ferenc Csorgo, P. W. Stankus, Motoi Inaba, German Martinez, Johannes Peter Wessels, Y. Berdnikov, J. L. Nagle, Y. Akiba, G. Baksay, A. P.T. Palounek, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, Vaclav Vrba, Klaus Johannes Reygers, Y. Cobigo, Alexei Khanzadeev, Yves Roland Schutz, M. T. Bjorndal, Y. S. Lai, M. Issah, H. Kanou, A. Devismes, Taku Gunji, H. Gong, J. Seele, M. D. Malik, N. Bruner, E. Stenlund, E. Vznuzdaev, F. Kajihara, J. Jin, E. M. Takagui, H. Sakata, H. A. Gustafsson, H. Delagrange, A. Hadj Henni, C. Zhang, K. Boyle, Wei Xie, S. Zhou, Y. S. Kim, Viktor Riabov, T. V. Moukhanova, S. Afanasiev, A. Ster, D. Hornback, M. Heffner, A. Taranenko, Kazushi Miki, B. Khachaturov, T. Matsumoto, K. Hasuko, Hiroyuki Okada, Joakim Nystrand, Eva Haslum, B. Lenzi, Minghui Liu, Kenneth Francis Read, A. V. Kazantsev, P. Mikeš, Yoichiro Fukao, T. C. Awes, T. Liška, Jun Kikuchi, Tadaaki Isobe, J. S. Chai, P. L. McGaughey, L. D. Isenhower, François Fleuret, B. Forestier, T. Ichihara, F. K. Wohn, Matthew G. Reuter, Takahiro Fusayasu, I. D. Ojha, Alexander Malakhov, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, S. N. White, K. Nakano, W. E. Sondheim, and P. A. Rukoyatkin
- Subjects
Shock wave ,Physics ,010308 nuclear & particles physics ,Hadron ,General Physics and Astronomy ,Jet (particle physics) ,Radiation ,01 natural sciences ,Gluon ,Azimuth ,Nuclear physics ,0103 physical sciences ,High Energy Physics::Experiment ,Atomic physics ,Nuclear Experiment ,010306 general physics ,Cherenkov radiation ,Beam (structure) - Abstract
We present azimuthal angle correlations of intermediate transverse momentum (1-4 GeV/c) hadrons from dijets in Cu+Cu and Au+Au collisions at root s(NN)=62.4 and 200 GeV. The away-side dijet induced azimuthal correlation is broadened, non-Gaussian, and peaked away from Delta phi=pi in central and semicentral collisions in all the systems. The broadening and peak location are found to depend upon the number of participants in the collision, but not on the collision energy or beam nuclei. These results are consistent with sound or shock wave models, but pose challenges to Cherenkov gluon radiation models.
- Published
- 2007
17. Evidence for a Long-Range Component in the Pion Emission Source inAu+AuCollisions atsNN=200 GeV
- Author
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S. C. Johnson, Y. J. Mao, M. J. Kweon, S. Kametani, Youngil Kwon, T. E. Miller, J. H. Kang, H. Tsuruoka, S. S. Adler, C. L. Silva, J. S. Haggerty, A. Romana, G. S. Kyle, Mate Csanad, R. Santo, James Alexander, J. B. Choi, A. Enokizono, S. Afanasiev, A. Ster, L. Sanfratello, Y. Jeong, R. Averbeck, Byung-Sik Hong, P. Chung, Masayasu Ishihara, F. Messer, A. Bazilevsky, M. Heffner, A. Taranenko, S. Borenstein, G. Gogiberidze, David D'Enterria, V. Bumazhnov, Susumu Sato, K. Ozawa, B. Khachaturov, I. Ravinovich, E. P. Hartouni, Philippe Rosnet, M. Muniruzzaman, S. P. Stoll, T. Matsumoto, Sean A. Kelly, T. L. Thomas, Alexandre Lebedev, Viktor Veszpremi, Joakim Nystrand, Charles Maguire, F. Plasil, T. Peitzmann, Saskia Mioduszewski, G. Bunce, R. P. Pisani, F. Staley, S. Sawada, D. M. Lee, S. Leckey, J. D. Tepe, A. Franz, Atsushi Taketani, Nikolay Tyurin, A. Isupov, Ryugo S. Hayano, S. S. Ryu, V. S. Pantuev, R. du Rietz, Josh Moss, S. S. Kapoor, N. N. Ajitanand, P. Tarján, K. Tanida, J. Gosset, J. P. Sullivan, Y. Riabov, V.A. Onuchin, A. Devismes, S. Belikov, K. S. Joo, M. Harvey, Kenta Shigaki, Senta Greene, M. Nara, W. C. Chang, V. I. Kochetkov, D. Jouan, Hideki Hamagaki, Takahiro Nakamura, G. David, Junji Tojo, I. Tserruya, S. F. Pate, M. Tamai, S. Zhou, Jan Rak, Roy A. Lacey, W. Guryn, K. Okada, C. H. Kuberg, M. A. Volkov, E. Kistenev, O. Dietzsch, H. Delagrange, S. N. White, A. S. Nyanin, E. O'Brien, M. E. Sadler, R. A. Soltz, H. Borel, S. Bathe, R. Granier de Cassagnac, M. Grosse Perdekamp, H. En'yo, P. Constantin, M. J. Leitch, Yves Roland Schutz, C. A. Ogilvie, Dipanwita Dutta, X. R. Wang, Yu. Efremenko, S. P. Sorensen, Yanwen Liu, M. Kopytine, Kensuke Homma, E. Melnikov, S. Yokkaichi, J. M. Heuser, V. Singh, K. El Chenawi, M. R. Shaw, S. Butsyk, T. K. Hemmick, A. Baldisseri, Yasuo Miake, Julia Velkovska, Peter M. Nilsson, Norio Saito, Vladimir Samsonov, A. Durum, M. Rosati, I. Otterlund, V. Papavassiliou, S. Chernichenko, H. Lim, H. Kobayashi, Martin Purschke, M. Velkovsky, Agneta Oskarsson, Shih-Chang Lee, D. Pal, R. Azmoun, G. B. Kim, E. M. Takagui, D. Koehler, D. S. Brown, David Olle Rickard Silvermyr, B. Bassalleck, F. Mühlbacher, L. Ewell, J. G. Boissevain, K. S. Sim, Y. Watanabe, M. Chiu, Ajit Kumar Mohanty, L. Kochenda, Y. Kuroki, Do-Won Kim, P. J. Kroon, A. A. Vinogradov, Henrik Tydesjö, Tamas Ferenc Csorgo, T. A. Shibata, J. G. Lajoie, Jiangyong Jia, T. Hachiya, J. L. Nagle, D. Kotchetkov, S. Bhagavatula, K. Katou, J. T. Mitchell, D. Mukhopadhyay, V. Babintsev, R. S. Towell, Y. Berdnikov, K. Kiyoyama, Dong-Hun Kim, W. Y. Jang, Y. Akiba, Y. Goto, Y. Cobigo, E. H. Kim, D. E. Fields, B. V. Jacak, W. E. Sondheim, A. Kiyomichi, A. G. Hansen, Shingo Sakai, T. Kohama, Z. Fraenkel, C. Pinkenburg, Vladislav Manko, J. E. Frantz, B. K. Nandi, M. D. Marx, K. Imai, I. J. Choi, S. Nagamiya, Kazuhiro Tanaka, Y. Tanaka, M. Stepanov, G. Roche, R. K. Choudhury, V. Ladygin, M. Gonin, D. Isenhower, Klaus Johannes Reygers, N. Grau, N. Kamihara, T. Chujo, A. K. Purwar, T. Ichihara, N. Hayashi, F. K. Wohn, A. Soldatov, X. Camard, A. Glenn, K. Kurita, German Martinez, T. K. Shea, F. Matathias, M. Sivertz, C. Y. Chi, T. K. Ghosh, A. Parmar, Matthew G. Reuter, P. W. Stankus, A. Drees, Hirohiko Sato, S. K. Tuli, I. D. Ojha, Alexander Malakhov, K. N. Barish, G. R. Young, Christine Angela Aidala, I. V. Sourikova, H. Torii, M. Ono, Y. Yang, L. S. Zolin, C. P. Singh, B. M. Johnson, P. D. Barnes, A. Yanovich, Jen-Chieh Peng, Hiroaki Ohnishi, S. Y. Fung, J. Milan, Brian Cole, H. W. Van Hecke, John Hill, K. Oyama, Toru Sugitate, François Fleuret, C. L. Woody, Dong Jo Kim, Osamu Jinnouchi, P. Chand, M. L. Brooks, Alexander Milov, O. Drapier, D. P. Morrison, V. E. Semenov, H. J. Kim, A. G. Litvinenko, H. Buesching, A. Kozlov, R. Seto, L. Villatte, Xingguo Li, X. He, V. Peresedov, H. Masui, J. S. Chai, P. L. McGaughey, J. M. Burward-Hoy, J. Chiba, M. Sakai, Minghui Liu, Kenneth Francis Read, G. C. Mishra, Takao Sakaguchi, C. Klein-Boesing, T. C. Awes, A. D. Frawley, Jun Kikuchi, S. H. Aronson, W. Holzmann, S. Batsouli, Y. I. Makdisi, L. Aphecetche, M. J. Tannenbaum, V. V. Ikonnikov, D. Bucher, A. P.T. Palounek, Wei Xie, A. Deshpande, E. J. Desmond, M. Hibino, S. Garpman, J. Park, R. Amirikas, H. A. Gustafsson, M. I. Nagy, I. E. Yushmanov, M. Issah, Alexei Khanzadeev, E. Vznuzdaev, N. Bruner, E. Stenlund, T. Shiina, R. E. Mischke, C. Zhang, Viktor Riabov, S. Esumi, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, Sergey Fokin, Jason Newby, A. Hoover, J. Murata, and B. D. Fox
- Subjects
Physics ,Range (particle radiation) ,Particle physics ,SIMPLE (dark matter experiment) ,010308 nuclear & particles physics ,Component (thermodynamics) ,Astrophysics::High Energy Astrophysical Phenomena ,Nuclear Theory ,General Physics and Astronomy ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Resonance (particle physics) ,Nuclear physics ,Pion ,0103 physical sciences ,Halo ,Nuclear Experiment ,010306 general physics ,Astrophysics::Galaxy Astrophysics - Abstract
Emission source functions are extracted from correlation functions constructed from charged pions produced at midrapidity in Au+Au collisions at s(NN)=200 GeV. The source parameters extracted from these functions at low k(T) give first indications of a long tail for the pion emission source. The source extension cannot be explained solely by simple kinematic considerations. The possible role of a halo of secondary pions from resonance emissions is explored.
- Published
- 2007
18. Measurement of Direct Photon Production inp+pCollisions ats=200 GeV
- Author
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J. E. Frantz, Herve Borel, A. Glenn, Alexei Khanzadeev, S. Afanasiev, A. Ster, V. L. Rykov, N. Bruner, M. Heffner, Robert F. Hobbs, A. Taranenko, B. Khachaturov, T. Matsumoto, K. Hasuko, Hiroyuki Okada, Joakim Nystrand, J. M. Burward-Hoy, R. A. Soltz, M. Grosse Perdekamp, O. Zaudtke, A. Pierson, J. L. Drachenberg, David Olle Rickard Silvermyr, S. Sawada, J. G. Boissevain, A. Franz, D. Mukhopadhyay, Y. Cobigo, Masashi Kaneta, I. Ravinovich, K. Katou, P. Tarján, Sean A. Kelly, S. S. Ryu, Viktor Veszpremi, Ahmed Al-Jamel, Anne Marie Sickles, C. Pinkenburg, S. Y. Fung, M. Stepanov, L. Sanfratello, T. L. Thomas, G. Roche, T. E. Miller, J. Gosset, Senta Greene, K. Ozawa, E. J. Desmond, V. Bumazhnov, M. P. Comets, J. P. Sullivan, C. H. Kuberg, J. Chiba, R. Santo, D. E. Fields, E. O'Brien, Jean-Pierre Cussonneau, O. Dietzsch, M. Togawa, S. P. Sorensen, B. V. Jacak, J. Park, Wei Xie, G. R. Young, Florian Bauer, Dipanwita Dutta, B. D. Fox, S. Yokkaichi, J. M. Heuser, Ryugo S. Hayano, A. Deshpande, X. He, A. K. Purwar, John Hill, K. Oyama, Y. Tsuchimoto, W. C. Chang, M. Rosati, M. Velkovsky, Ferenc Deák, N. Kamihara, I. E. Yushmanov, Roy A. Lacey, Y. J. Mao, J. T. Mitchell, Bruno Espagnon, A. A. Vinogradov, S. Kametani, S. S. Adler, G. S. Kyle, Y. Tanaka, Toru Sugitate, Henrik Tydesjö, L. D. Isenhower, V. Peresedov, Pàl Hidas, T. K. Shea, V-N. Tram, J. H. Kang, G. C. Mishra, M. Chiu, Ajit Kumar Mohanty, Youngil Kwon, T. A. Shibata, Takao Sakaguchi, J. G. Lajoie, Y. Riabov, T. Hachiya, Kenta Shigaki, S. Butsyk, P. L. McGaughey, Jiangyong Jia, Y. Goto, V. S. Pantuev, Vladimir Samsonov, C. Klein-Boesing, N. N. Ajitanand, J. S. Haggerty, S. F. Pate, A. Romana, M. Harvey, Ch. Finck, Jason Newby, Junji Tojo, A. S. Nyanin, K. S. Sim, D. Isenhower, X. R. Wang, A. D. Frawley, François Fleuret, Ingvar Otterlund, I. J. Choi, M. Gonin, V.N. Penev, Takahiro Nakamura, F. Matathias, R. Armendariz, German Martinez, K. Okada, Tamas Ferenc Csorgo, Charles Maguire, A. Kiss, Motoi Inaba, S. Leckey, Y. Watanabe, K. Kurita, H. Pereira, Anders Nils Erik Oskarsson, J. L. Nagle, T. Ichihara, F. K. Wohn, Matthew G. Reuter, Vladislav Manko, Henner Buesching, S. H. Aronson, M. Issah, H. En'yo, P. Constantin, W. Holzmann, H. Masui, V. Papavassiliou, A. Durum, Sébastien Gadrat, A. Drees, A. V. Kazantsev, I. D. Ojha, A. Devismes, M. J. Leitch, Alexander Malakhov, Hiroaki Ohnishi, F. Kajihara, Josh Moss, D. S. Brown, C. L. Woody, H. Hiejima, Mate Csanad, E. Vznuzdaev, N. Willis, L. S. Zolin, James Alexander, J. M. Qualls, T. Chujo, H. Delagrange, Maya Hachiya Shimomura, Y. I. Makdisi, Marie Germain, W. J. Park, K. Das, X. Camard, N. Grau, C. Zhang, P. D. Barnes, A. G. Litvinenko, A. Yanovich, E. Kistenev, S. Zhou, Xingguo Li, P. Chand, R. Averbeck, Byung-Sik Hong, E. P. Hartouni, K. Imai, David D'Enterria, Martin Purschke, Evert Anders Stenlund, A. G. Hansen, M. A. Volkov, S. N. White, Shingo Sakai, A. Kozlov, R. Seto, H. W. Vanhecke, Christine Angela Aidala, A. Bazilevsky, Jan Rak, R. P. Pisani, M. J. Tannenbaum, Nikolay Tyurin, D. Kotchetkov, V. Dzhordzhadze, H. Pei, Viktor Riabov, S. Takagi, W. E. Sondheim, V. V. Ikonnikov, R. Granier de Cassagnac, Yoichiro Fukao, K. N. Barish, T. C. Awes, L. Aphecetche, Takeo Kawabata, M. C. McCain, C. A. Ogilvie, Jun Kikuchi, M. T. Bjorndal, D. Bucher, T. K. Hemmick, Yasuo Miake, S. Batsouli, I. V. Sourikova, H. Torii, Z. Fraenkel, P. W. Stankus, Philippe Rosnet, T. J. Uam, Minghui Liu, H. J. Kim, L. Kochenda, Kenneth Francis Read, M. L. Brooks, Alexandre Lebedev, R. Kohara, A. P.T. Palounek, Kensuke Homma, A. Soldatov, S. P. Stoll, K. Tanida, S. Esumi, S. S.E. Rosendahl, G. Bunce, D. M. Lee, V. I. Kochetkov, S. Chernichenko, R. K. Choudhury, W. A. Zajc, H. Lim, Xiaopeng Zong, D. Jouan, B. Bassalleck, V. Baublis, A. Denisov, V. Cianciolo, M. Inuzuka, Hideki Hamagaki, K. Aoki, G. David, S. C. Johnson, M. Konno, Sergey Fokin, Gerd Joachim Kunde, H. Kobayashi, S. Bathe, I. Shein, Saskia Mioduszewski, T. Horaguchi, A. Hoover, E. H. Kim, M. J. Kweon, Y. Le Bornec, Y. Akiba, P. J. Kroon, S. Nagamiya, Yves Roland Schutz, Kazuhiro Tanaka, Alberto Baldisseri, Klaus Johannes Reygers, C. L. Silva, D. Pal, Masayasu Ishihara, Susumu Sato, E. M. Takagui, M. Muniruzzaman, Atsushi Taketani, F. Staley, S. Belikov, K. S. Joo, B. Komkov, Hans-Åke Gustafsson, B. M. Johnson, Norio Saito, M. A. L. Leite, A. Isupov, V. Babintsev, Brian Cole, R. S. Towell, Akio Kiyomichi, C. Y. Chi, Jen-Chieh Peng, Dong Jo Kim, Osamu Jinnouchi, I. Tserruya, Yu. Efremenko, G. B. Kim, Hirohiko Sato, J. Velkovska, Alexander Milov, O. Drapier, E. R. Kinney, D. P. Morrison, V. E. Semenov, and J. Zimányi
- Subjects
Quantum chromodynamics ,Physics ,Photon ,010308 nuclear & particles physics ,Astrophysics::High Energy Astrophysical Phenomena ,Nuclear Theory ,General Physics and Astronomy ,Parton ,Jet (particle physics) ,01 natural sciences ,7. Clean energy ,Nuclear physics ,Transverse plane ,0103 physical sciences ,Transverse momentum ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider - Abstract
Cross sections for midrapidity production of direct photons in p+p collisions at the Relativistic Heavy Ion Collider (RHIC) are reported for transverse momenta of 3 5 GeV/c, where the uncertainties of the measurement and theory are comparable. We also report on the effect of requiring the photons to be isolated from parton jet energy. The observed fraction of isolated photons is well described by pQCD for p(T)> 7 GeV/c.
- Published
- 2007
19. System size and energy dependence of jet-induced hadron pair correlation shapes in Cu+Cu and Au+Au collisions at square root sNN=200 and 62.4 GeV
- Author
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A, Adare, S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, A, Al-Jamel, K, Aoki, L, Aphecetche, R, Armendariz, S H, Aronson, J, Asai, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, G, Baksay, L, Baksay, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, F, Bauer, A, Bazilevsky, S, Belikov, R, Bennett, Y, Berdnikov, A A, Bickley, M T, Bjorndal, J G, Boissevain, H, Borel, K, Boyle, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, S, Campbell, J-S, Chai, P, Chand, B S, Chang, W C, Chang, J-L, Charvet, S, Chernichenko, J, Chiba, C Y, Chi, M, Chiu, I J, Choi, R K, Choudhury, T, Chujo, P, Chung, A, Churyn, V, Cianciolo, C R, Cleven, Y, Cobigo, B A, Cole, M P, Comets, P, Constantin, M, Csanád, T, Csörgo, J P, Cussonneau, T, Dahms, K, Das, G, David, F, Deák, M B, Deaton, K, Dehmelt, H, Delagrange, A, Denisov, D, d'Enterria, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, A, Dion, M, Donadelli, J L, Drachenberg, O, Drapier, A, Drees, A K, Dubey, A, Durum, D, Dutta, V, Dzhordzhadze, Y V, Efremenko, J, Egdemir, F, Ellinghaus, W S, Emam, A, Enokizono, H, En'yo, B, Espagnon, S, Esumi, K O, Eyser, D E, Fields, C, Finck, M, Finger, F, Fleuret, S L, Fokin, B, Forestier, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, S-Y, Fung, T, Fusayasu, S, Gadrat, I, Garishvili, F, Gastineau, M, Germain, A, Glenn, H, Gong, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, H-A, Gustafsson, T, Hachiya, A, Hadj Henni, C, Haegemann, J S, Haggerty, M N, Hagiwara, H, Hamagaki, R, Han, A G, Hansen, H, Harada, E P, Hartouni, K, Haruna, M, Harvey, E, Haslum, K, Hasuko, R, Hayano, M, Heffner, T K, Hemmick, T, Hester, J M, Heuser, X, He, P, Hidas, H, Hiejima, J C, Hill, R, Hobbs, M, Hohlmann, M, Holmes, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Horaguchi, D, Hornback, M G, Hur, T, Ichihara, V V, Ikonnikov, K, Imai, M, Inaba, Y, Inoue, M, Inuzuka, D, Isenhower, L, Isenhower, M, Ishihara, T, Isobe, M, Issah, A, Isupov, B V, Jacak, J, Jia, J, Jin, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, F, Kajihara, S, Kametani, N, Kamihara, J, Kamin, M, Kaneta, J H, Kang, H, Kanou, K, Katou, T, Kawabata, T, Kawagishi, D, Kawall, A V, Kazantsev, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, E, Kim, G-B, Kim, H J, Kim, Y-S, Kim, E, Kinney, A, Kiss, E, Kistenev, A, Kiyomichi, J, Klay, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, R, Kohara, B, Komkov, M, Konno, D, Kotchetkov, A, Kozlov, A, Král, A, Kravitz, P J, Kroon, J, Kubart, C H, Kuberg, G J, Kunde, N, Kurihara, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, Y-S, Lai, J G, Lajoie, A, Lebedev, Y, Le Bornec, S, Leckey, D M, Lee, M K, Lee, T, Lee, M J, Leitch, M A L, Leite, B, Lenzi, H, Lim, T, Liska, A, Litvinenko, M X, Liu, X, Li, X H, Li, B, Love, D, Lynch, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, Y, Mao, G, Martinez, L, Masek, H, Masui, F, Matathias, T, Matsumoto, M C, McCain, M, McCumber, P L, McGaughey, Y, Miake, P, Mikes, K, Miki, T E, Miller, A, Milov, S, Mioduszewski, G C, Mishra, M, Mishra, J T, Mitchell, M, Mitrovski, A K, Mohanty, A, Morreale, D P, Morrison, J M, Moss, T V, Moukhanova, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagata, J L, Nagle, M, Naglis, I, Nakagawa, Y, Nakamiya, T, Nakamura, K, Nakano, J, Newby, M, Nguyen, B E, Norman, A S, Nyanin, J, Nystrand, E, O'Brien, S X, Oda, C A, Ogilvie, H, Ohnishi, I D, Ojha, H, Okada, K, Okada, M, Oka, O O, Omiwade, A, Oskarsson, I, Otterlund, M, Ouchida, K, Oyama, K, Ozawa, R, Pak, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, W J, Park, S F, Pate, H, Pei, V, Penev, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, A, Pierson, C, Pinkenburg, R P, Pisani, M L, Purschke, A K, Purwar, J M, Qualls, H, Qu, J, Rak, A, Rakotozafindrabe, I, Ravinovich, K F, Read, S, Rembeczki, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, S S E, Rosendahl, P, Rosnet, P, Rukoyatkin, V L, Rykov, S S, Ryu, B, Sahlmueller, N, Saito, T, Sakaguchi, S, Sakai, H, Sakata, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, J, Seele, R, Seidl, V, Semenov, R, Seto, D, Sharma, T K, Shea, I, Shein, A, Shevel, T-A, Shibata, K, Shigaki, M, Shimomura, T, Shohjoh, K, Shoji, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, C P, Singh, V, Singh, S, Skutnik, M, Slunecka, W C, Smith, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, C, Suire, J P, Sullivan, J, Sziklai, T, Tabaru, S, Takagi, E M, Takagui, A, Taketani, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, A, Taranenko, P, Tarján, T L, Thomas, M, Togawa, A, Toia, J, Tojo, L, Tomásek, H, Torii, R S, Towell, V-N, Tram, I, Tserruya, Y, Tsuchimoto, S K, Tuli, H, Tydesjö, N, Tyurin, T J, Uam, C, Vale, H, Valle, H W, vanHecke, J, Velkovska, M, Velkovsky, R, Vertesi, V, Veszprémi, A A, Vinogradov, M, Virius, M A, Volkov, V, Vrba, E, Vznuzdaev, M, Wagner, D, Walker, X R, Wang, Y, Watanabe, J, Wessels, S N, White, N, Willis, D, Winter, F K, Wohn, C L, Woody, M, Wysocki, W, Xie, Y L, Yamaguchi, A, Yanovich, Z, Yasin, J, Ying, S, Yokkaichi, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, O, Zaudtke, C, Zhang, S, Zhou, J, Zimányi, L, Zolin, and X, Zong
- Abstract
We present azimuthal angle correlations of intermediate transverse momentum (1-4 GeV/c) hadrons from dijets in Cu+Cu and Au+Au collisions at square root sNN=62.4 and 200 GeV. The away-side dijet induced azimuthal correlation is broadened, non-Gaussian, and peaked away from Delta phi=pi in central and semicentral collisions in all the systems. The broadening and peak location are found to depend upon the number of participants in the collision, but not on the collision energy or beam nuclei. These results are consistent with sound or shock wave models, but pose challenges to Cherenkov gluon radiation models.
- Published
- 2006
20. Forward Neutral Pion Production inp+pandd+AuCollisions atsNN=200 GeV
- Author
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J. Adams, M. M. Aggarwal, Z. Ahammed, J. Amonett, B. D. Anderson, D. Arkhipkin, G. S. Averichev, S. K. Badyal, Y. Bai, J. Balewski, O. Barannikova, L. S. Barnby, J. Baudot, S. Bekele, V. V. Belaga, A. Bellingeri-Laurikainen, R. Bellwied, J. Berger, B. I. Bezverkhny, S. Bharadwaj, A. Bhasin, A. K. Bhati, V. S. Bhatia, H. Bichsel, J. Bielcik, J. Bielcikova, A. Billmeier, L. C. Bland, C. O. Blyth, S-L. Blyth, B. E. Bonner, M. Botje, A. Boucham, J. Bouchet, A. V. Brandin, A. Bravar, M. Bystersky, R. V. Cadman, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, O. Catu, D. Cebra, Z. Chajecki, P. Chaloupka, S. Chattopadhyay, H. F. Chen, J. H. Chen, Y. Chen, J. Cheng, M. Cherney, A. Chikanian, H. A. Choi, W. Christie, J. P. Coffin, T. M. Cormier, M. R. Cosentino, J. G. Cramer, H. J. Crawford, D. Das, S. Das, M. Daugherity, M. M. de Moura, T. G. Dedovich, M. DePhillips, A. A. Derevschikov, L. Didenko, T. Dietel, S. M. Dogra, W. J. Dong, X. Dong, J. E. Draper, F. Du, A. K. Dubey, V. B. Dunin, J. C. Dunlop, M. R. Dutta Mazumdar, V. Eckardt, W. R. Edwards, L. G. Efimov, V. Emelianov, J. Engelage, G. Eppley, B. Erazmus, M. Estienne, P. Fachini, J. Faivre, R. Fatemi, J. Fedorisin, K. Filimonov, P. Filip, E. Finch, V. Fine, Y. Fisyak, K. S. F. Fornazier, B. D. Fox, J. Fu, C. A. Gagliardi, L. Gaillard, J. Gans, M. S. Ganti, F. Geurts, V. Ghazikhanian, P. Ghosh, J. E. Gonzalez, Y. G. Gorbunov, H. Gos, O. Grachov, O. Grebenyuk, D. Grosnick, S. M. Guertin, Y. Guo, A. Gupta, N. Gupta, T. D. Gutierrez, T. J. Hallman, A. Hamed, J. W. Harris, M. Heinz, T. W. Henry, S. Hepplemann, B. Hippolyte, A. Hirsch, E. Hjort, G. W. Hoffmann, M. J. Horner, H. Z. Huang, S. L. Huang, E. W. Hughes, T. J. Humanic, G. Igo, A. Ishihara, P. Jacobs, W. W. Jacobs, H. Jiang, P. G. Jones, E. G. Judd, S. Kabana, K. Kang, M. Kaplan, D. Keane, A. Kechechyan, V. Yu. Khodyrev, B. C. Kim, J. Kiryluk, A. Kisiel, E. M. Kislov, S. R. Klein, D. D. Koetke, T. Kollegger, M. Kopytine, L. Kotchenda, K. L. Kowalik, M. Kramer, P. Kravtsov, V. I. Kravtsov, K. Krueger, C. Kuhn, A. I. Kulikov, A. Kumar, R. Kh. Kutuev, A. A. Kuznetsov, R. Lamb, M. A. C. Lamont, J. M. Landgraf, S. Lange, F. Laue, J. Lauret, A. Lebedev, R. Lednicky, C-H. Lee, S. Lehocka, M. J. LeVine, C. Li, Q. Li, Y. Li, G. Lin, S. J. Lindenbaum, M. A. Lisa, F. Liu, H. Liu, J. Liu, L. Liu, Q. J. Liu, Z. Liu, T. Ljubicic, W. J. Llope, H. Long, R. S. Longacre, M. Lopez-Noriega, W. A. Love, Y. Lu, T. Ludlam, D. Lynn, G. L. Ma, J. G. Ma, Y. G. Ma, D. Magestro, S. Mahajan, D. P. Mahapatra, R. Majka, L. K. Mangotra, R. Manweiler, S. Margetis, C. Markert, L. Martin, J. N. Marx, H. S. Matis, Yu. A. Matulenko, C. J. McClain, T. S. McShane, Yu. Melnick, A. Meschanin, M. L. Miller, N. G. Minaev, C. Mironov, A. Mischke, D. K. Mishra, J. Mitchell, S. Mioduszewski, B. Mohanty, L. Molnar, C. F. Moore, D. A. Morozov, M. G. Munhoz, B. K. Nandi, S. K. Nayak, T. K. Nayak, J. M. Nelson, P. K. Netrakanti, V. A. Nikitin, L. V. Nogach, S. B. Nurushev, G. Odyniec, A. Ogawa, V. Okorokov, M. Oldenburg, D. Olson, S. K. Pal, Y. Panebratsev, S. Y. Panitkin, A. I. Pavlinov, T. Pawlak, T. Peitzmann, V. Perevoztchikov, C. Perkins, W. Peryt, V. A. Petrov, S. C. Phatak, R. Picha, M. Planinic, J. Pluta, N. Porile, J. Porter, A. M. Poskanzer, M. Potekhin, E. Potrebenikova, B. V. K. S. Potukuchi, D. Prindle, C. Pruneau, J. Putschke, G. Rakness, R. Raniwala, S. Raniwala, O. Ravel, R. L. Ray, S. V. Razin, D. Reichhold, J. G. Reid, J. Reinnarth, G. Renault, F. Retiere, A. Ridiger, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, A. Rose, C. Roy, L. Ruan, M. J. Russcher, R. Sahoo, I. Sakrejda, S. Salur, J. Sandweiss, M. Sarsour, I. Savin, P. S. Sazhin, J. Schambach, R. P. Scharenberg, N. Schmitz, K. Schweda, J. Seger, I. Selyuzhenkov, P. Seyboth, A. Shabetai, E. Shahaliev, M. Shao, W. Shao, M. Sharma, W. Q. Shen, K. E. Shestermanov, S. S. Shimanskiy, E Sichtermann, F. Simon, R. N. Singaraju, N. Smirnov, R. Snellings, G. Sood, P. Sorensen, J. Sowinski, J. Speltz, H. M. Spinka, B. Srivastava, A. Stadnik, T. D. S. Stanislaus, R. Stock, A. Stolpovsky, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, E. Sugarbaker, M. Sumbera, B. Surrow, M. Swanger, T. J. M. Symons, A. Szanto de Toledo, A. Tai, J. Takahashi, A. H. Tang, T. Tarnowsky, D. Thein, J. H. Thomas, A. R. Timmins, S. Timoshenko, M. Tokarev, T. A. Trainor, S. Trentalange, R. E. Tribble, O. D. Tsai, J. Ulery, T. Ullrich, D. G. Underwood, G. Van Buren, N. van der Kolk, M. van Leeuwen, A. M. Vander Molen, R. Varma, I. M. Vasilevski, A. N. Vasiliev, R. Vernet, S. E. Vigdor, Y. P. Viyogi, S. Vokal, S. A. Voloshin, W. T. Waggoner, F. Wang, G. Wang, X. L. Wang, Y. Wang, Z. M. Wang, H. Ward, J. W. Watson, J. C. Webb, G. D. Westfall, A. Wetzler, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, J. Wood, J. Wu, N. Xu, Q. H. Xu, Z. Xu, Z. Z. Xu, P. Yepes, I-K. Yoo, V. I. Yurevich, I. Zborovsky, H. Zhang, W. M. Zhang, Y. Zhang, Z. P. Zhang, C. Zhong, R. Zoulkarneev, Y. Zoulkarneeva, A. N. Zubarev, and J. X. Zuo
- Subjects
Physics ,Quantum chromodynamics ,Particle physics ,Meson ,010308 nuclear & particles physics ,Hadron ,General Physics and Astronomy ,Perturbative QCD ,Elementary particle ,01 natural sciences ,7. Clean energy ,Gluon ,Nuclear physics ,Recoil ,Pion ,0103 physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics - Abstract
Measurements of the production of forward pi(0) mesons from p+p and d+Au collisions at root s(NN) = 200 GeV are reported. The p+p yield generally agrees with next-to-leading order perturbative QCD calculations. The d+Au yield per binary collision is suppressed as eta increases, decreasing to similar to 30% of the p+p yield at =4.00, well below shadowing expectations. Exploratory measurements of azimuthal correlations of the forward pi(0) with charged hadrons at eta approximate to 0 show a recoil peak in p+p that is suppressed in d+Au at low pion energy. These observations are qualitatively consistent with a saturation picture of the low-x gluon structure of heavy nuclei.
- Published
- 2006
21. Limits on the high-energy gamma and neutrino fluxes from the SGR 1806-20 giant flare of 27 December 2004 with the AMANDA-II detector
- Author
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A. Achterberg, M. Ackermann, J. Adams, J. Ahrens, K. Andeen, D. W. Atlee, J. N. Bahcall, X. Bai, B. Baret, M. Bartelt, S. W. Barwick, R. Bay, K. Beattie, T. Becka, J. K. Becker, K.-H. Becker, P. Berghaus, D. Berley, E. Bernardini, D. Bertrand, D. Z. Besson, E. Blaufuss, D. J. Boersma, C. Bohm, J. Bolmont, S. Böser, O. Botner, A. Bouchta, J. Braun, C. Burgess, T. Burgess, T. Castermans, D. Chirkin, B. Christy, J. Clem, D. F. Cowen, M. V. D’Agostino, A. Davour, C. T. Day, C. De Clercq, L. Demirörs, F. Descamps, P. Desiati, T. DeYoung, J. C. Diaz-Velez, J. Dreyer, J. P. Dumm, M. R. Duvoort, W. R. Edwards, R. Ehrlich, J. Eisch, R. W. Ellsworth, P. A. Evenson, O. Fadiran, A. R. Fazely, T. Feser, K. Filimonov, B. D. Fox, T. K. Gaisser, J. Gallagher, R. Ganugapati, H. Geenen, L. Gerhardt, A. Goldschmidt, J. A. Goodman, R. Gozzini, S. Grullon, A. Groß, R. M. Gunasingha, M. Gurtner, A. Hallgren, F. Halzen, K. Han, K. Hanson, D. Hardtke, R. Hardtke, T. Harenberg, J. E. Hart, T. Hauschildt, D. Hays, J. Heise, K. Helbing, M. Hellwig, P. Herquet, G. C. Hill, J. Hodges, K. D. Hoffman, B. Hommez, K. Hoshina, D. Hubert, B. Hughey, P. O. Hulth, K. Hultqvist, S. Hundertmark, J.-P. Hülß, A. Ishihara, J. Jacobsen, G. S. Japaridze, A. Jones, J. M. Joseph, K.-H. Kampert, A. Karle, H. Kawai, J. L. Kelley, M. Kestel, N. Kitamura, S. R. Klein, S. Klepser, G. Kohnen, H. Kolanoski, L. Köpke, M. Krasberg, K. Kuehn, H. Landsman, H. Leich, I. Liubarsky, J. Lundberg, J. Madsen, K. Mase, H. S. Matis, T. McCauley, C. P. McParland, A. Meli, T. Messarius, P. Mészáros, H. Miyamoto, A. Mokhtarani, T. Montaruli, A. Morey, R. Morse, S. M. Movit, K. Münich, R. Nahnhauer, J. W. Nam, P. Nießen, D. R. Nygren, H. Ögelman, Ph. Olbrechts, A. Olivas, S. Patton, C. Peña-Garay, C. Pérez de los Heros, A. Piegsa, D. Pieloth, A. C. Pohl, R. Porrata, J. Pretz, P. B. Price, G. T. Przybylski, K. Rawlins, S. Razzaque, F. Refflinghaus, E. Resconi, W. Rhode, M. Ribordy, A. Rizzo, S. Robbins, P. Roth, C. Rott, D. Rutledge, D. Ryckbosch, H.-G. Sander, S. Sarkar, S. Schlenstedt, T. Schmidt, D. Schneider, D. Seckel, S. H. Seo, S. Seunarine, A. Silvestri, A. J. Smith, M. Solarz, C. Song, J. E. Sopher, G. M. Spiczak, C. Spiering, M. Stamatikos, T. Stanev, P. Steffen, T. Stezelberger, R. G. Stokstad, M. C. Stoufer, S. Stoyanov, E. A. Strahler, T. Straszheim, K.-H. Sulanke, G. W. Sullivan, T. J. Sumner, I. Taboada, O. Tarasova, A. Tepe, L. Thollander, S. Tilav, P. A. Toale, D. Turčan, N. van Eijndhoven, J. Vandenbroucke, A. Van Overloop, B. Voigt, W. Wagner, C. Walck, H. Waldmann, M. Walter, Y.-R. Wang, C. Wendt, C. H. Wiebusch, G. Wikström, D. R. Williams, R. Wischnewski, H. Wissing, K. Woschnagg, X. W. Xu, G. Yodh, S. Yoshida, and J. D. Zornoza
- Subjects
Astroparticle physics ,Physics ,Muon ,Solar flare ,Physics::Instrumentation and Detectors ,Astrophysics::High Energy Astrophysical Phenomena ,Astrophysics (astro-ph) ,Gamma ray ,General Physics and Astronomy ,Astronomy ,FOS: Physical sciences ,Astrophysics ,Galaxy ,law.invention ,Pulsar ,law ,Astronomia ,High Energy Physics::Experiment ,Neutrino ,Flare - Abstract
On December 27th 2004, a giant gamma flare from the Soft Gamma-ray Repeater 1806-20 saturated many satellite gamma-ray detectors. This event was by more than two orders of magnitude the brightest cosmic transient ever observed. If the gamma emission extends up to TeV energies with a hard power law energy spectrum, photo-produced muons could be observed in surface and underground arrays. Moreover, high-energy neutrinos could have been produced during the SGR giant flare if there were substantial baryonic outflow from the magnetar. These high-energy neutrinos would have also produced muons in an underground array. AMANDA-II was used to search for downgoing muons indicative of high-energy gammas and/or neutrinos. The data revealed no significant signal. The upper limit on the gamma flux at 90% CL is dN/dE < 0.05 (0.5) TeV^-1 m^-2 s^-1 for gamma=-1.47 (-2). Similarly, we set limits on the normalization constant of the high-energy neutrino emission of 0.4 (6.1) TeV^-1 m^-2 s^-1 for gamma=-1.47 (-2)., 14 pages, 3 figures
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- 2006
22. Azimuthal Angle Correlations for Rapidity Separated Hadron Pairs ind+AuCollisions atsNN=200 GeV
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S. N. White, C. H. Kuberg, J. Chiba, T. E. Miller, S. Batsouli, G. C. Mishra, R. Santo, V-N. Tram, Takao Sakaguchi, Robert F. Hobbs, C. Klein-Boesing, A. D. Frawley, D. Mukhopadhyay, S. Butsyk, S. Afanasiev, A. Ster, Vladimir Samsonov, Y. Cobigo, W. E. Sondheim, M. Chiu, Ajit Kumar Mohanty, Y. J. Mao, S. Kametani, Pàl Hidas, I. Tserruya, Yu. Efremenko, J. H. Kang, J. S. Haggerty, A. Romana, Anders Nils Erik Oskarsson, S. C. Johnson, M. J. Kweon, Motoi Inaba, T. A. Shibata, S. Sawada, A. Franz, Minghui Liu, S. H. Aronson, G. B. Kim, A. P.T. Palounek, D. Isenhower, German Martinez, B. Espagnon, J. E. Frantz, Kenneth Francis Read, Wei Xie, H. Kobayashi, A. Deshpande, S. Bathe, Tamas Ferenc Csorgo, Anne Marie Sickles, Y. Le Bornec, Kensuke Homma, Sean A. Kelly, Mate Csanad, Viktor Veszpremi, J. L. Nagle, Ferenc Deák, N. Kamihara, D. E. Fields, B. V. Jacak, W. Holzmann, Herve Borel, A. Glenn, Y. Akiba, S. Y. Fung, M. Heffner, A. Taranenko, S. Chernichenko, Hirohiko Sato, F. Matathias, R. Armendariz, J. Velkovska, V. S. Pantuev, A. Drees, S. Takagi, Maya Hachiya Shimomura, S. Nagamiya, Kazuhiro Tanaka, A. Devismes, V. L. Rykov, I. Ravinovich, Y. I. Makdisi, F. Kajihara, H. Lim, B. Bassalleck, David D'Enterria, Klaus Johannes Reygers, P. L. McGaughey, A. K. Purwar, S. Esumi, H. Delagrange, M. Harvey, M. Konno, Jen-Chieh Peng, Atsushi Taketani, Y. Tanaka, T. K. Shea, V. Bumazhnov, M. P. Comets, M. J. Tannenbaum, Senta Greene, John Hill, K. Oyama, Toru Sugitate, L. D. Isenhower, R. P. Pisani, Martin Purschke, V. V. Ikonnikov, Nikolay Tyurin, S. Zhou, S. F. Pate, M. A. Volkov, François Fleuret, K. N. Barish, M. Issah, N. Grau, A. Isupov, S. S. Ryu, E. O'Brien, D. Kotchetkov, Ahmed Al-Jamel, Dong Jo Kim, Osamu Jinnouchi, Junji Tojo, N. N. Ajitanand, X. R. Wang, R. A. Soltz, B. Khachaturov, P. Tarján, T. Matsumoto, Y. Watanabe, D. Bucher, A. V. Kazantsev, K. Hasuko, T. Ichihara, W. A. Zajc, V. Baublis, K. Aoki, A. Denisov, V. Cianciolo, E. Vznuzdaev, Sergey Fokin, M. T. Bjorndal, F. K. Wohn, Z. Fraenkel, W. C. Chang, Alexander Milov, K. Okada, M. Grosse Perdekamp, Matthew G. Reuter, Hiroyuki Okada, A. Pierson, V. Papavassiliou, Sébastien Gadrat, C. A. Ogilvie, T. K. Hemmick, Takahiro Nakamura, Roy A. Lacey, H. En'yo, O. Drapier, Joakim Nystrand, I. D. Ojha, Alexander Malakhov, Yasuo Miake, P. Constantin, Charles Maguire, S. Leckey, T. Horaguchi, E. R. Kinney, A. Hoover, P. W. Stankus, D. P. Morrison, R. K. Choudhury, S. Belikov, K. S. Joo, Yoichiro Fukao, J. T. Mitchell, M. J. Leitch, V. E. Semenov, J. Zimányi, T. J. Uam, L. Aphecetche, Vladislav Manko, Takeo Kawabata, M. C. McCain, David Olle Rickard Silvermyr, A. Durum, Josh Moss, L. S. Zolin, A. Soldatov, L. Kochenda, T. Chujo, M. L. Brooks, H. W. Van Hecke, J. M. Burward-Hoy, X. Camard, W. J. Park, E. Kistenev, T. C. Awes, Christine Angela Aidala, P. D. Barnes, A. Yanovich, D. S. Brown, Y. J. Kwon, Jun Kikuchi, J. G. Boissevain, Masashi Kaneta, K. Katou, C. Pinkenburg, A. Kiss, M. Stepanov, G. Roche, C. L. Silva, L. Sanfratello, R. Kohara, J. Gosset, J. P. Sullivan, Henner Buesching, C. L. Woody, Marie Germain, C. Zhang, S. Yokkaichi, J. M. Heuser, K. Ozawa, Masayasu Ishihara, P. Chand, H. Pei, Susumu Sato, S. P. Stoll, B. D. Fox, M. Muniruzzaman, A. G. Litvinenko, P. J. Kroon, Viktor Riabov, F. Staley, H. J. Kim, K. Tanida, S. S.E. Rosendahl, G. Bunce, V. I. Kochetkov, A. Kozlov, M. Rosati, M. Velkovsky, A. A. Vinogradov, Henrik Tydesjö, R. Seto, Jiangyong Jia, Y. Goto, D. Jouan, O. Dietzsch, Gerd Joachim Kunde, Dipanwita Dutta, I. Shein, V. Dzhordzhadze, X. He, M. Inuzuka, Hideki Hamagaki, K. Das, V. Peresedov, E. P. Hartouni, G. David, Alberto Baldisseri, Saskia Mioduszewski, H. Masui, Yves Roland Schutz, D. Pal, E. M. Takagui, R. S. Towell, Akio Kiyomichi, C. Y. Chi, B. M. Johnson, Brian Cole, G. R. Young, Jan Rak, R. Granier de Cassagnac, K. S. Sim, H. Hiejima, K. Imai, J. L. Drachenberg, Ch. Finck, Jason Newby, S. P. Sorensen, Alexei Khanzadeev, N. Bruner, J. G. Lajoie, T. Hachiya, Ingvar Otterlund, I. J. Choi, M. Gonin, V.N. Penev, K. Kurita, H. Pereira, E. J. Desmond, Jean-Pierre Cussonneau, M. Togawa, J. Park, Hiroaki Ohnishi, Florian Bauer, Y. Tsuchimoto, J. M. Qualls, I. E. Yushmanov, Xingguo Li, I. V. Sourikova, H. Torii, T. L. Thomas, Ryugo S. Hayano, Y. Riabov, Kenta Shigaki, A. S. Nyanin, Evert Anders Stenlund, A. G. Hansen, Shingo Sakai, E. H. Kim, S. S. Adler, G. S. Kyle, N. Willis, James Alexander, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Philippe Rosnet, Alexandre Lebedev, D. M. Lee, Xiaopeng Zong, B. Komkov, Hans-Åke Gustafsson, Norio Saito, M. A. L. Leite, and V. Babintsev
- Subjects
Physics ,Quantum chromodynamics ,Particle physics ,010308 nuclear & particles physics ,Nuclear Theory ,Hadron ,General Physics and Astronomy ,Parton ,Jet (particle physics) ,7. Clean energy ,01 natural sciences ,Color-glass condensate ,Nuclear physics ,0103 physical sciences ,High Energy Physics::Experiment ,Rapidity ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider ,Nucleon - Abstract
Deuteron-gold (d+Au) collisions at the Relativistic Heavy Ion Collider provide ideal platforms for testing QCD theories in dense nuclear matter at high energy. In particular, models suggesting strong saturation effects for partons carrying small nucleon momentum fraction (x) predict modifications to jet production at forward rapidity (deuteron-going direction) in d+Au collisions. We report on two-particle azimuthal angle correlations between charged hadrons at forward/backward (deuteron/gold going direction) rapidity and charged hadrons at midrapidity in d+Au and p+p collisions at root s(NN)=200 GeV. Jet structures observed in the correlations are quantified in terms of the conditional yield and angular width of away-side partners. The kinematic region studied here samples partons in the gold nucleus with x similar to 0.1 to similar to 0.01. Within this range, we find no x dependence of the jet structure in d+Au collisions.
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- 2006
23. Evidence for a long-range component in the pion emission source in Au+Au collisions at sqrt sNN=200 GeV
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, J, Alexander, R, Amirikas, L, Aphecetche, S H, Aronson, R, Averbeck, T C, Awes, R, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, A, Bazilevsky, S, Belikov, Y, Berdnikov, S, Bhagavatula, J G, Boissevain, H, Borel, S, Borenstein, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, J-S, Chai, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, J, Choi, R K, Choudhury, T, Chujo, P, Chung, V, Cianciolo, Y, Cobigo, B A, Cole, P, Constantin, M, Csanád, T, Csörgo, D, d'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, O, Drapier, A, Drees, R, du Rietz, A, Durum, D, Dutta, Y V, Efremenko, K El, Chenawi, A, Enokizono, H, En'yo, S, Esumi, L, Ewell, D E, Fields, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, G, Gogiberidze, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M Grosse, Perdekamp, W, Guryn, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, R, Hayano, N, Hayashi, X, He, M, Heffner, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Ichihara, V V, Ikonnikov, K, Imai, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, W Y, Jang, Y, Jeong, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, S, Kametani, N, Kamihara, J H, Kang, S S, Kapoor, K, Katou, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, D W, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kistenev, A, Kiyomichi, K, Kiyoyama, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, M, Kopytine, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, K, Kurita, Y, Kuroki, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, V, Ladygin, J G, Lajoie, A, Lebedev, S, Leckey, D M, Lee, S, Lee, M J, Leitch, X H, Li, H, Lim, A, Litvinenko, M X, Liu, Y, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, M D, Marx, H, Masui, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, F, Messer, Y, Miake, J, Milan, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, J L, Nagle, M, Nagy, T, Nakamura, B K, Nandi, M, Nara, J, Newby, P, Nilsson, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, M, Ono, V, Onuchin, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, A, Parmar, S F, Pate, T, Peitzmann, J-C, Peng, V, Peresedov, C, Pinkenburg, R P, Pisani, F, Plasil, M L, Purschke, A K, Purwar, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, P, Rosnet, S S, Ryu, M E, Sadler, N, Saito, T, Sakaguchi, M, Sakai, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, M R, Shaw, T K, Shea, T-A, Shibata, K, Shigaki, T, Shiina, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, A, Taranenko, P, Tarján, J D, Tepe, T L, Thomas, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, S K, Tuli, H, Tydesjö, N, Tyurin, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, L, Villatte, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, F K, Wohn, C L, Woody, W, Xie, Y, Yang, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, S J, Zhou, and L, Zolin
- Abstract
Emission source functions are extracted from correlation functions constructed from charged pions produced at midrapidity in Au+Au collisions at sqrt[s(NN)]=200 GeV. The source parameters extracted from these functions at low k(T) give first indications of a long tail for the pion emission source. The source extension cannot be explained solely by simple kinematic considerations. The possible role of a halo of secondary pions from resonance emissions is explored.
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- 2006
24. Common Suppression Pattern ofηandπ0Mesons at High Transverse Momentum inAu+AuCollisions atsNN=200 GeV
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N. Kamihara, F. Matathias, A. Drees, I. Ravinovich, Sean A. Kelly, M. A. Volkov, A. Devismes, B. Khachaturov, V.A. Onuchin, C. A. Ogilvie, S. P. Stoll, T. K. Hemmick, F. Plasil, G. Bunce, T. Ichihara, Yasuo Miake, D. Jouan, L. Kochenda, S. F. Pate, Y. Kuroki, W. Y. Jang, V. S. Pantuev, M. Rosati, Viktor Veszpremi, T. Matsumoto, T. Peitzmann, F. K. Wohn, T. K. Ghosh, S. Belikov, K. S. Joo, A. Isupov, S. S. Ryu, Matthew G. Reuter, V. Bumazhnov, I. D. Ojha, M. Harvey, M. Velkovsky, Saskia Mioduszewski, Alexander Malakhov, H. Delagrange, S. S. Adler, G. S. Kyle, Alexander Milov, Yves Roland Schutz, B. D. Fox, X. R. Wang, Y. Watanabe, S. Garpman, M. Kopytine, Junji Tojo, J. Gosset, A. A. Vinogradov, Henrik Tydesjö, S. Zhou, Senta Greene, Joakim Nystrand, Hiroaki Ohnishi, G. R. Young, D. Pal, James Alexander, Jiangyong Jia, Y. Goto, M. Nara, J. P. Sullivan, K. N. Barish, O. Drapier, L. S. Zolin, J. Milan, V. Papavassiliou, E. M. Takagui, A. G. Hansen, Y. Jeong, R. Averbeck, Shingo Sakai, E. O'Brien, Y. I. Makdisi, A. Soldatov, Hideki Hamagaki, D. P. Morrison, M. Ono, Y. Yang, K. Okada, Jan Rak, D. E. Fields, W. Guryn, Byung-Sik Hong, B. V. Jacak, A. Bazilevsky, C. P. Singh, R. A. Soltz, G. David, C. H. Kuberg, K. El Chenawi, M. R. Shaw, H. A. Gustafsson, P. D. Barnes, A. Yanovich, K. Tanida, J. E. Frantz, V. I. Kochetkov, P. Tarján, R. Granier de Cassagnac, T. E. Miller, B. Sahlmueller, B. M. Johnson, S. Afanasiev, A. Ster, M. Issah, A. K. Purwar, M. Grosse Perdekamp, S. Bathe, R. Santo, A. Enokizono, W. C. Chang, V. E. Semenov, H. En'yo, S. Yokkaichi, P. Constantin, J. M. Heuser, M. J. Leitch, Martin Purschke, J. B. Choi, R. E. Mischke, C. Zhang, S. N. White, S. Sawada, J. D. Tepe, Kensuke Homma, H. Tsuruoka, E. Melnikov, Roy A. Lacey, A. Franz, N. N. Ajitanand, F. Messer, E. Vznuzdaev, D. Kotchetkov, S. Bhagavatula, M. J. Tannenbaum, Philippe Rosnet, O. Dietzsch, Takahiro Nakamura, David Olle Rickard Silvermyr, Jen-Chieh Peng, S. Chernichenko, Herve Borel, S. Butsyk, S. S. Kapoor, Brian Cole, E. P. Hartouni, M. Heffner, V. V. Ikonnikov, J. G. Boissevain, I. V. Sourikova, H. Lim, H. Torii, R. S. Towell, Shih-Chang Lee, M. E. Sadler, B. Bassalleck, F. Mühlbacher, Alberto Baldisseri, M. Chiu, Ajit Kumar Mohanty, T. A. Shibata, Vladimir Samsonov, I. Otterlund, Viktor Riabov, Alexandre Lebedev, T. L. Thomas, T. Shiina, Dipanwita Dutta, K. S. Sim, Y. J. Kwon, K. Kiyoyama, L. Ewell, A. Durum, Yi Liu, M. L. Brooks, S. Batsouli, Z. Fraenkel, Julia Velkovska, G. Gogiberidze, D. Bucher, B. K. Nandi, K. Katou, D. M. Lee, David D'Enterria, W. E. Sondheim, D. S. Brown, Ryugo S. Hayano, Do-Won Kim, P. J. Kroon, L. Sanfratello, S. Borenstein, Dong-Hun Kim, H. Hiejima, C. L. Silva, D. Isenhower, R. K. Choudhury, Y. Riabov, S. C. Johnson, K. Ozawa, J. Chiba, X. He, A. Kiyomichi, J. T. Mitchell, A. Glenn, H. J. Kim, C. Pinkenburg, Kenta Shigaki, German Martinez, N. Hayashi, Masayasu Ishihara, Y. J. Mao, M. J. Kweon, L. Aphecetche, M. Sakai, K. Imai, S. Y. Fung, R. P. Pisani, Vladislav Manko, Susumu Sato, A. S. Nyanin, Dong Jo Kim, M. Muniruzzaman, M. D. Marx, J. L. Nagle, C. Y. Chi, G. C. Mishra, F. Staley, V. Peresedov, Osamu Jinnouchi, N. Grau, M. Stepanov, G. Roche, Takao Sakaguchi, E. H. Kim, Nikolay Tyurin, S. Kametani, T. Chujo, T. Kohama, C. Klein-Boesing, John Hill, K. Oyama, C. L. Woody, X. Camard, H. Buesching, A. Parmar, J. H. Kang, I. Tserruya, A. P.T. Palounek, Toru Sugitate, A. D. Frawley, P. W. Stankus, Christine Angela Aidala, J. S. Haggerty, Yu. Efremenko, Atsushi Taketani, A. Romana, V. Singh, S. H. Aronson, H. Masui, L. Villatte, W. Holzmann, G. B. Kim, François Fleuret, D. Koehler, S. Esumi, Xingguo Li, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, A. G. Litvinenko, Sergey Fokin, Charles Maguire, S. Leckey, Wei Xie, Norio Saito, A. Hoover, A. Kozlov, A. Deshpande, Hirohiko Sato, R. Seto, S. K. Tuli, P. Chand, S. P. Sorensen, R. du Rietz, V. Babintsev, Josh Moss, Peter M. Nilsson, M. Tamai, E. Kistenev, J. G. Lajoie, T. Hachiya, R. Azmoun, I. J. Choi, V. Ladygin, M. Gonin, H. Kobayashi, Agneta Oskarsson, D. Mukhopadhyay, K. Kurita, Y. Cobigo, Y. Berdnikov, Y. Akiba, M. Sivertz, S. Nagamiya, Kazuhiro Tanaka, Klaus Johannes Reygers, Y. Tanaka, T. K. Shea, H. W. Van Hecke, Alexei Khanzadeev, N. Bruner, E. Stenlund, J. S. Chai, P. L. McGaughey, J. M. Burward-Hoy, E. J. Desmond, M. Hibino, J. Park, R. Amirikas, I. E. Yushmanov, T. C. Awes, Jun Kikuchi, Jason Newby, J. Murata, Minghui Liu, and Kenneth Francis Read
- Subjects
Nuclear reaction ,Physics ,Meson ,010308 nuclear & particles physics ,Nuclear Theory ,Hadron ,General Physics and Astronomy ,Electron ,01 natural sciences ,7. Clean energy ,Spectral line ,Nuclear physics ,Momentum ,Positron ,Deuterium ,0103 physical sciences ,High Energy Physics::Experiment ,Atomic physics ,Nuclear Experiment ,010306 general physics - Abstract
Inclusive transverse momentum spectra of eta mesons have been measured within p(T)=2-10 GeV/c at midrapidity by the PHENIX experiment in Au+Au collisions at root s(NN) = 200 GeV. In central Au+Au the eta yields are significantly suppressed compared to peripheral Au+Au, d+Au, and p+p yields scaled by the corresponding number of nucleon-nucleon collisions. The magnitude, centrality, and p(T) dependence of the suppression is common, within errors, for eta and pi(0). The ratio of eta to pi(0) spectra at high p(T) amounts to 0.40 < R-eta/pi(0)< 0.48 for the three systems, in agreement with the world average measured in hadronic and nuclear reactions and, at large scaled momentum, in e(+)e(-) collisions.
- Published
- 2006
25. Azimuthal angle correlations for rapidity separated Hadron pairs in d+Au collisions at square root of sNN=200 GeV
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, A, Al-Jamel, J, Alexander, K, Aoki, L, Aphecetche, R, Armendariz, S H, Aronson, R, Averbeck, T C, Awes, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, F, Bauer, A, Bazilevsky, S, Belikov, M T, Bjorndal, J G, Boissevain, H, Borel, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, M P, Comets, P, Constantin, M, Csanád, T, Csörgo, J P, Cussonneau, D, d'Enterria, K, Das, G, David, F, Deák, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, J L, Drachenberg, O, Drapier, A, Drees, A, Durum, D, Dutta, V, Dzhordzhadze, Y V, Efremenko, H, En'yo, B, Espagnon, S, Esumi, D E, Fields, C, Finck, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, Y, Fukao, S-Y, Fung, S, Gadrat, M, Germain, A, Glenn, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M Grosse, Perdekamp, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, K, Hasuko, R, Hayano, X, He, M, Heffner, T K, Hemmick, J M, Heuser, P, Hidas, H, Hiejima, J C, Hill, R, Hobbs, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Horaguchi, T, Ichihara, V V, Ikonnikov, K, Imai, M, Inaba, M, Inuzuka, D, Isenhower, L, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, F, Kajihara, S, Kametani, N, Kamihara, M, Kaneta, J H, Kang, K, Katou, T, Kawabata, A V, Kazantsev, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kinney, A, Kiss, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, R, Kohara, B, Komkov, M, Konno, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, G J, Kunde, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, Y, Le Bornec, A, Lebedev, S, Leckey, D M, Lee, M J, Leitch, M A L, Leite, X H, Li, H, Lim, A, Litvinenko, M X, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, H, Masui, F, Matathias, T, Matsumoto, M C, McCain, P L, McGaughey, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, D, Mukhopadhyay, M, Muniruzzaman, S, Nagamiya, J L, Nagle, T, Nakamura, J, Newby, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, H, Okada, K, Okada, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, W J, Park, S F, Pate, H, Pei, V, Penev, J-C, Peng, H, Pereira, V, Peresedov, A, Pierson, C, Pinkenburg, R P, Pisani, M L, Purschke, A K, Purwar, J M, Qualls, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, S S E, Rosendahl, P, Rosnet, V L, Rykov, S S, Ryu, N, Saito, T, Sakaguchi, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, A, Sickles, C L, Silva, D, Silvermyr, K S, Sim, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, S, Takagi, E M, Takagui, A, Taketani, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, A, Taranenko, P, Tarján, T L, Thomas, M, Togawa, J, Tojo, H, Torii, R S, Towell, V-N, Tram, I, Tserruya, Y, Tsuchimoto, H, Tydesjö, N, Tyurin, T J, Uam, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, N, Willis, F K, Wohn, C L, Woody, W, Xie, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, J, Zimányi, L, Zolin, and X, Zong
- Abstract
Deuteron-gold (d+Au) collisions at the Relativistic Heavy Ion Collider provide ideal platforms for testing QCD theories in dense nuclear matter at high energy. In particular, models suggesting strong saturation effects for partons carrying small nucleon momentum fraction (x) predict modifications to jet production at forward rapidity (deuteron-going direction) in d+Au collisions. We report on two-particle azimuthal angle correlations between charged hadrons at forward/backward (deuteron/gold going direction) rapidity and charged hadrons at midrapidity in d+Au and p+p collisions at square root of sNN=200 GeV. Jet structures observed in the correlations are quantified in terms of the conditional yield and angular width of away-side partners. The kinematic region studied here samples partons in the gold nucleus with x~0.1 to ~0.01. Within this range, we find no x dependence of the jet structure in d+Au collisions.
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- 2006
26. Forward neutral pion production in p + p and d + Au collisions at square root sNN=200 GeV
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J, Adams, M M, Aggarwal, Z, Ahammed, J, Amonett, B D, Anderson, D, Arkhipkin, G S, Averichev, S K, Badyal, Y, Bai, J, Balewski, O, Barannikova, L S, Barnby, J, Baudot, S, Bekele, V V, Belaga, A, Bellingeri-Laurikainen, R, Bellwied, J, Berger, B I, Bezverkhny, S, Bharadwaj, A, Bhasin, A K, Bhati, V S, Bhatia, H, Bichsel, J, Bielcik, J, Bielcikova, A, Billmeier, L C, Bland, C O, Blyth, S-L, Blyth, B E, Bonner, M, Botje, A, Boucham, J, Bouchet, A V, Brandin, A, Bravar, M, Bystersky, R V, Cadman, X Z, Cai, H, Caines, M Calderón de la Barca, Sánchez, O, Catu, D, Cebra, Z, Chajecki, P, Chaloupka, S, Chattopadhyay, H F, Chen, J H, Chen, Y, Chen, J, Cheng, M, Cherney, A, Chikanian, H A, Choi, W, Christie, J P, Coffin, T M, Cormier, M R, Cosentino, J G, Cramer, H J, Crawford, D, Das, S, Das, M, Daugherity, M M, de Moura, T G, Dedovich, M, Dephillips, A A, Derevschikov, L, Didenko, T, Dietel, S M, Dogra, W J, Dong, X, Dong, J E, Draper, F, Du, A K, Dubey, V B, Dunin, J C, Dunlop, M R Dutta, Mazumdar, V, Eckardt, W R, Edwards, L G, Efimov, V, Emelianov, J, Engelage, G, Eppley, B, Erazmus, M, Estienne, P, Fachini, J, Faivre, R, Fatemi, J, Fedorisin, K, Filimonov, P, Filip, E, Finch, V, Fine, Y, Fisyak, K S F, Fornazier, B D, Fox, J, Fu, C A, Gagliardi, L, Gaillard, J, Gans, M S, Ganti, F, Geurts, V, Ghazikhanian, P, Ghosh, J E, Gonzalez, Y G, Gorbunov, H, Gos, O, Grachov, O, Grebenyuk, D, Grosnick, S M, Guertin, Y, Guo, A, Gupta, N, Gupta, T D, Gutierrez, T J, Hallman, A, Hamed, J W, Harris, M, Heinz, T W, Henry, S, Hepplemann, B, Hippolyte, A, Hirsch, E, Hjort, G W, Hoffmann, M J, Horner, H Z, Huang, S L, Huang, E W, Hughes, T J, Humanic, G, Igo, A, Ishihara, P, Jacobs, W W, Jacobs, H, Jiang, P G, Jones, E G, Judd, S, Kabana, K, Kang, M, Kaplan, D, Keane, A, Kechechyan, V Yu, Khodyrev, B C, Kim, J, Kiryluk, A, Kisiel, E M, Kislov, S R, Klein, D D, Koetke, T, Kollegger, M, Kopytine, L, Kotchenda, K L, Kowalik, M, Kramer, P, Kravtsov, V I, Kravtsov, K, Krueger, C, Kuhn, A I, Kulikov, A, Kumar, R Kh, Kutuev, A A, Kuznetsov, R, Lamb, M A C, Lamont, J M, Landgraf, S, Lange, F, Laue, J, Lauret, A, Lebedev, R, Lednicky, C-H, Lee, S, Lehocka, M J, Levine, C, Li, Q, Li, Y, Li, G, Lin, S J, Lindenbaum, M A, Lisa, F, Liu, H, Liu, J, Liu, L, Liu, Q J, Liu, Z, Liu, T, Ljubicic, W J, Llope, H, Long, R S, Longacre, M, Lopez-Noriega, W A, Love, Y, Lu, T, Ludlam, D, Lynn, G L, Ma, J G, Ma, Y G, Ma, D, Magestro, S, Mahajan, D P, Mahapatra, R, Majka, L K, Mangotra, R, Manweiler, S, Margetis, C, Markert, L, Martin, J N, Marx, H S, Matis, Yu A, Matulenko, C J, McClain, T S, McShane, Yu, Melnick, A, Meschanin, M L, Miller, N G, Minaev, C, Mironov, A, Mischke, D K, Mishra, J, Mitchell, S, Mioduszewski, B, Mohanty, L, Molnar, C F, Moore, D A, Morozov, M G, Munhoz, B K, Nandi, S K, Nayak, T K, Nayak, J M, Nelson, P K, Netrakanti, V A, Nikitin, L V, Nogach, S B, Nurushev, G, Odyniec, A, Ogawa, V, Okorokov, M, Oldenburg, D, Olson, S K, Pal, Y, Panebratsev, S Y, Panitkin, A I, Pavlinov, T, Pawlak, T, Peitzmann, V, Perevoztchikov, C, Perkins, W, Peryt, V A, Petrov, S C, Phatak, R, Picha, M, Planinic, J, Pluta, N, Porile, J, Porter, A M, Poskanzer, M, Potekhin, E, Potrebenikova, B V K S, Potukuchi, D, Prindle, C, Pruneau, J, Putschke, G, Rakness, R, Raniwala, S, Raniwala, O, Ravel, R L, Ray, S V, Razin, D, Reichhold, J G, Reid, J, Reinnarth, G, Renault, F, Retiere, A, Ridiger, H G, Ritter, J B, Roberts, O V, Rogachevskiy, J L, Romero, A, Rose, C, Roy, L, Ruan, M J, Russcher, R, Sahoo, I, Sakrejda, S, Salur, J, Sandweiss, M, Sarsour, I, Savin, P S, Sazhin, J, Schambach, R P, Scharenberg, N, Schmitz, K, Schweda, J, Seger, I, Selyuzhenkov, P, Seyboth, A, Shabetai, E, Shahaliev, M, Shao, W, Shao, M, Sharma, W Q, Shen, K E, Shestermanov, S S, Shimanskiy, E, Sichtermann, F, Simon, R N, Singaraju, N, Smirnov, R, Snellings, G, Sood, P, Sorensen, J, Sowinski, J, Speltz, H M, Spinka, B, Srivastava, A, Stadnik, T D S, Stanislaus, R, Stock, A, Stolpovsky, M, Strikhanov, B, Stringfellow, A A P, Suaide, E, Sugarbaker, M, Sumbera, B, Surrow, M, Swanger, T J M, Symons, A Szanto, de Toledo, A, Tai, J, Takahashi, A H, Tang, T, Tarnowsky, D, Thein, J H, Thomas, A R, Timmins, S, Timoshenko, M, Tokarev, T A, Trainor, S, Trentalange, R E, Tribble, O D, Tsai, J, Ulery, T, Ullrich, D G, Underwood, G Van, Buren, N, van der Kolk, M, van Leeuwen, A M Vander, Molen, R, Varma, I M, Vasilevski, A N, Vasiliev, R, Vernet, S E, Vigdor, Y P, Viyogi, S, Vokal, S A, Voloshin, W T, Waggoner, F, Wang, G, Wang, X L, Wang, Y, Wang, Z M, Wang, H, Ward, J W, Watson, J C, Webb, G D, Westfall, A, Wetzler, C, Whitten, H, Wieman, S W, Wissink, R, Witt, J, Wood, J, Wu, N, Xu, Q H, Xu, Z, Xu, Z Z, Xu, P, Yepes, I-K, Yoo, V I, Yurevich, I, Zborovsky, H, Zhang, W M, Zhang, Y, Zhang, Z P, Zhang, C, Zhong, R, Zoulkarneev, Y, Zoulkarneeva, A N, Zubarev, and J X, Zuo
- Abstract
Measurements of the production of forward pi0 mesons from p + p and d + Au collisions at square root sNN=200 GeV are reported. The p + p yield generally agrees with next-to-leading order perturbative QCD calculations. The d + Au yield per binary collision is suppressed as eta increases, decreasing to approximately 30% of the p + p yield at eta =4.00, well below shadowing expectations. Exploratory measurements of azimuthal correlations of the forward pi0 with charged hadrons at eta approximately 0 show a recoil peak in p + p that is suppressed in d + Au at low pion energy. These observations are qualitatively consistent with a saturation picture of the low-x gluon structure of heavy nuclei.
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- 2006
27. Measurement of Identifiedπ0and Inclusive Photon Second-Harmonic Parameterv2and Implications for Direct Photon Production insNN=200 GeVAu+Au
- Author
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N. N. Ajitanand, Takahiro Nakamura, R. A. Soltz, H. Borel, T. Ichihara, M. E. Sadler, M. Grosse Perdekamp, F. K. Wohn, T. K. Ghosh, Matthew G. Reuter, A. Durum, I. D. Ojha, Alexander Malakhov, D. S. Brown, V.A. Onuchin, L. S. Zolin, X. He, David Olle Rickard Silvermyr, S. Belikov, K. S. Joo, P. D. Barnes, A. Yanovich, V. Peresedov, T. L. Thomas, C. L. Silva, David D'Enterria, V. S. Pantuev, R. P. Pisani, M. Harvey, Ryugo S. Hayano, Masayasu Ishihara, J. Chiba, H. Masui, Nikolay Tyurin, Susumu Sato, Junji Tojo, Y. Riabov, Kenta Shigaki, S. Afanasiev, A. Ster, M. Muniruzzaman, M. Sakai, J. T. Mitchell, N. Kamihara, F. Staley, G. C. Mishra, F. Matathias, J. E. Frantz, K. Okada, H. En'yo, Sean A. Kelly, A. Drees, Y. Tanaka, T. K. Shea, P. Constantin, M. J. Leitch, A. S. Nyanin, Takao Sakaguchi, R. S. Towell, C. Klein-Boesing, Viktor Veszpremi, D. E. Fields, B. V. Jacak, A. K. Purwar, A. D. Frawley, S. Kametani, K. N. Barish, H. Tsuruoka, A. Glenn, F. Messer, K. El Chenawi, M. R. Shaw, M. Ono, Vladislav Manko, S. H. Aronson, Y. Watanabe, J. H. Kang, M. D. Marx, S. N. White, Hiroaki Ohnishi, J. Milan, W. Holzmann, M. Heffner, M. A. Volkov, Y. I. Makdisi, J. S. Haggerty, A. Romana, Senta Greene, M. Nara, Y. J. Kwon, Charles Maguire, S. Leckey, C. A. Ogilvie, N. Hayashi, A. Soldatov, Alexander Milov, T. K. Hemmick, I. Ravinovich, E. O'Brien, M. L. Brooks, G. Gogiberidze, Yasuo Miake, L. Sanfratello, S. Butsyk, M. J. Tannenbaum, S. Sawada, Paul Stankus, C. Y. Chi, R. du Rietz, Josh Moss, T. Chujo, M. Tamai, W. E. Sondheim, J. D. Tepe, A. Franz, V. V. Ikonnikov, K. Tanida, F. Plasil, S. Borenstein, K. Ozawa, I. V. Sourikova, H. Torii, Vladimir Samsonov, I. Otterlund, E. Kistenev, V. I. Kochetkov, L. Kochenda, Minghui Liu, S. Y. Fung, S. S. Kapoor, Shih-Chang Lee, X. Camard, D. Bucher, B. Khachaturov, Y. Kuroki, K. S. Sim, O. Drapier, W. Y. Jang, Martin Purschke, Y. Yang, C. L. Woody, Hideki Hamagaki, G. David, A. Parmar, A. G. Litvinenko, T. Matsumoto, H. Buesching, Kenneth Francis Read, C. P. Singh, A. Isupov, S. S. Ryu, B. M. Johnson, C. H. Kuberg, S. F. Pate, John Hill, K. Oyama, J. Egdemir, S. P. Stoll, Xingguo Li, D. Kotchetkov, S. Bhagavatula, K. Imai, P. Chand, D. P. Morrison, A. G. Hansen, Toru Sugitate, A. Kozlov, G. R. Young, Joakim Nystrand, R. Seto, N. Grau, X. R. Wang, V. Ladygin, M. Gonin, Jan Rak, W. Guryn, Shingo Sakai, Christine Angela Aidala, J. G. Boissevain, François Fleuret, G. Bunce, J. L. Nagle, Z. Fraenkel, R. Granier de Cassagnac, V. E. Semenov, K. Kurita, H. J. Kim, R. K. Choudhury, M. Sivertz, V. Papavassiliou, S. Zhou, Brian Cole, K. Katou, C. Zhang, S. C. Johnson, Y. J. Mao, M. J. Kweon, D. Jouan, T. Kohama, Soren Pontoppidan Sorensen, A. Kiyomichi, T. Peitzmann, Do-Won Kim, P. J. Kroon, L. Villatte, Dong-Hun Kim, Saskia Mioduszewski, C. Pinkenburg, Jen-Chieh Peng, Peter M. Nilsson, M. Stepanov, G. Roche, J. G. Lajoie, T. Hachiya, Yves Roland Schutz, J. Gosset, J. P. Sullivan, V. Bumazhnov, I. J. Choi, Atsushi Taketani, D. Pal, Jun Kikuchi, H. W. Van Hecke, E. M. Takagui, H. Kobayashi, Terry C Awes, S. Yokkaichi, J. M. Heuser, J. S. Chai, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, R. Azmoun, S. Nagamiya, S. Batsouli, Kazuhiro Tanaka, Klaus Johannes Reygers, P. Tarján, P. L. McGaughey, W. C. Chang, Yuri Efremenko, J. M. Burward-Hoy, S. Bathe, Dong Jo Kim, Osamu Jinnouchi, Roy A. Lacey, Kensuke Homma, E. Melnikov, A. P.T. Palounek, S. Chernichenko, H. Lim, B. Bassalleck, F. Mühlbacher, L. Ewell, I. Tserruya, M. Rosati, D. Mukhopadhyay, Y. Cobigo, V. Singh, M. Velkovsky, G. B. Kim, D. Koehler, S. Esumi, Hirohiko Sato, S. K. Tuli, Jason Newby, A. A. Vinogradov, Henrik Tydesjö, W. A. Zajc, Jiangyong Jia, Y. Goto, V. Baublis, A. Denisov, V. Cianciolo, J. Murata, Sergey Fokin, S. S. Adler, G. S. Kyle, James Alexander, Y. Jeong, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, A. Hoover, Alexei Khanzadeev, Philippe Rosnet, N. Bruner, Alexandre Lebedev, E. Stenlund, S. Garpman, D. M. Lee, E. H. Kim, H. A. Gustafsson, O. Dietzsch, R. E. Mischke, Dipanwita Dutta, Julia Velkovska, E. J. Desmond, Viktor Riabov, M. Hibino, J. Park, R. Amirikas, I. E. Yushmanov, Norio Saito, A. Devismes, V. Babintsev, H. Delagrange, M. Kopytine, A. Baldisseri, M. Issah, E. Vznuzdaev, T. E. Miller, R. Santo, A. Enokizono, T. Shiina, M. Chiu, Ajit Kumar Mohanty, T. A. Shibata, K. Kiyoyama, B. K. Nandi, D. Isenhower, German Martinez, Wei Xie, B. D. Fox, A. Deshpande, J. B. Choi, E. P. Hartouni, Yi Liu, and L. Aphecetche
- Subjects
Physics ,Particle physics ,Range (particle radiation) ,Photon ,010308 nuclear & particles physics ,Hadron ,General Physics and Astronomy ,01 natural sciences ,law.invention ,Nuclear physics ,Azimuth ,Particle decay ,law ,0103 physical sciences ,High harmonic generation ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics ,Anisotropy ,Collider - Abstract
The azimuthal distribution of identified π0 and inclusive photons has been measured in VsNN=200 GeV Au+Au collisions with the PHENIX experiment at the Relativistic Heavy-Ion Collider (RHIC). The second-harmonic parameter (v2) was measured to describe the observed anisotropy of the azimuthal distribution. The measured inclusive photon v2 is consistent with the value expected for the photons from hadron decay and is also consistent with the lack of direct photon signal over the measured pT range 1–6 GeV/c. An attempt is made to extract v2 of direct photons.
- Published
- 2006
28. Nuclear Modification of Electron Spectra and Implications for Heavy Quark Energy Loss inAu+AuCollisions atsNN=200 GeV
- Author
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J. G. Boissevain, K. Katou, S. Bathe, S. Y. Fung, A. Kiyomichi, C. Pinkenburg, S. Butsyk, Vladimir Samsonov, B. Khachaturov, V. S. Pantuev, I. Ravinovich, M. Stepanov, G. Roche, Jan Rak, W. Guryn, Kensuke Homma, E. Melnikov, S. Chernichenko, I. Otterlund, K. Oyama, E. H. Kim, T. Matsumoto, I. Tserruya, N. N. Ajitanand, Yu. Efremenko, H. Lim, B. Bassalleck, F. Mühlbacher, L. Ewell, Minghui Liu, M. Harvey, R. Granier de Cassagnac, Y. Watanabe, A. Soldatov, V. Singh, G. B. Kim, D. Koehler, J. Chiba, M. Sakai, Toru Sugitate, Junji Tojo, S. Kametani, Kenneth Francis Read, Joakim Nystrand, Takahiro Nakamura, Martin Purschke, K. Tanida, V. I. Kochetkov, O. Dietzsch, S. Afanasiev, A. Ster, G. C. Mishra, Takao Sakaguchi, M. E. Sadler, J. S. Haggerty, A. Romana, J. L. Nagle, Dipanwita Dutta, S. S. Adler, G. S. Kyle, C. L. Silva, Charles Maguire, S. Leckey, B. D. Fox, François Fleuret, D. Kotchetkov, S. Bhagavatula, Masayasu Ishihara, Susumu Sato, M. Muniruzzaman, A. Durum, F. Staley, T. Kohama, Julia Velkovska, James Alexander, Y. Jeong, R. Averbeck, Byung-Sik Hong, Hirohiko Sato, C. Klein-Boesing, A. D. Frawley, T. Peitzmann, H. W. Van Hecke, Z. Fraenkel, S. K. Tuli, A. Bazilevsky, Saskia Mioduszewski, F. Messer, D. S. Brown, R. du Rietz, Josh Moss, Philippe Rosnet, Alexandre Lebedev, S. H. Aronson, Hyun-Chul Kim, M. Rosati, D. M. Lee, M. Heffner, M. Velkovsky, M. Tamai, K. Okada, Alexander Milov, S. Esumi, W. Holzmann, J. T. Mitchell, E. Kistenev, T. C. Awes, R. K. Choudhury, V.A. Onuchin, S. Belikov, K. S. Joo, Vladislav Manko, O. Drapier, G. Gogiberidze, Shih-Chang Lee, Y. I. Makdisi, S. P. Sorensen, M. D. Marx, A. A. Vinogradov, Henrik Tydesjö, Jun Kikuchi, D. E. Fields, B. V. Jacak, Youngil Kwon, D. P. Morrison, H. En'yo, P. Constantin, V. Bumazhnov, Norio Saito, W. A. Zajc, K. S. Sim, T. Chujo, X. Camard, Yves Roland Schutz, Peter M. Nilsson, Y. Goto, V. E. Semenov, M. J. Leitch, C. L. Woody, J. Gosset, A. Parmar, S. F. Pate, J. S. Chai, J. P. Sullivan, P. L. McGaughey, H. Tsuruoka, Christine Angela Aidala, V. Babintsev, M. J. Tannenbaum, Sean A. Kelly, A. K. Purwar, P. Chand, J. G. Lajoie, T. Hachiya, A. Devismes, Hideki Hamagaki, Y. Tanaka, G. David, Jen-Chieh Peng, J. C. Hill, V. V. Ikonnikov, J. M. Burward-Hoy, V. Baublis, A. Denisov, T. K. Shea, D. Pal, J. Jia, Wei Xie, W. E. Sondheim, I. J. Choi, C. H. Kuberg, P. Tarján, D. Bucher, V. Cianciolo, K. El Chenawi, M. R. Shaw, Viktor Veszpremi, E. M. Takagui, Hiroaki Ohnishi, J. Milan, David D'Enterria, X. R. Wang, Jason Newby, W. C. Chang, A. Deshpande, Y. Yang, J. Murata, S. C. Johnson, T. Ichihara, Y. J. Mao, L. Sanfratello, S. Yokkaichi, Dong Jo Kim, J. M. Heuser, Roy A. Lacey, Sergey Fokin, Osamu Jinnouchi, C. P. Singh, B. M. Johnson, M. J. Kweon, R. P. Pisani, F. K. Wohn, T. K. Ghosh, Matthew G. Reuter, S. Borenstein, J. B. Choi, K. Ozawa, Nikolay Tyurin, I. D. Ojha, Alexander Malakhov, A. Hoover, H. Delagrange, Yi Liu, H. Buesching, S. Garpman, Do-Won Kim, P. J. Kroon, L. Aphecetche, E. J. Desmond, L. S. Zolin, Xingguo Li, E. P. Hartouni, Brian Cole, Atsushi Taketani, V. Papavassiliou, K. Imai, V. Ladygin, M. Gonin, Dong-Hun Kim, L. Villatte, H. Kobayashi, R. S. Towell, H. A. Gustafsson, P. D. Barnes, A. Yanovich, M. Kopytine, Agneta Oskarsson, M. Hibino, J. Park, K. Kurita, S. Zhou, R. E. Mischke, M. Sivertz, C. Zhang, N. Grau, N. Hayashi, M. Issah, C. Y. Chi, Y. Berdnikov, Y. Akiba, P. W. Stankus, E. Vznuzdaev, A. Baldisseri, Viktor Riabov, T. Shiina, Senta Greene, S. Sawada, M. Nara, J. D. Tepe, A. Franz, R. Amirikas, S. S. Kapoor, S. Nagamiya, I. E. Yushmanov, Kazuhiro Tanaka, S. Batsouli, A. P.T. Palounek, Alexei Khanzadeev, N. Bruner, E. Stenlund, Klaus Johannes Reygers, E. O'Brien, R. A. Soltz, H. Borel, M. Chiu, Ajit Kumar Mohanty, T. A. Shibata, M. Grosse Perdekamp, David Olle Rickard Silvermyr, K. Kiyoyama, B. K. Nandi, G. R. Young, D. Isenhower, German Martinez, T. E. Miller, R. Santo, A. Enokizono, N. Kamihara, F. Matathias, A. Drees, J. Egdemir, S. P. Stoll, G. Bunce, D. Jouan, M. A. Volkov, C. A. Ogilvie, J. Kang, A. G. Hansen, T. K. Hemmick, Yasuo Miake, Shingo Sakai, L. Kochenda, Y. Kuroki, W. Y. Jang, I. V. Sourikova, H. Torii, T. L. Thomas, Ryugo S. Hayano, Y. Riabov, Kenta Shigaki, A. S. Nyanin, K. N. Barish, M. Ono, M. L. Brooks, A. G. Litvinenko, A. Kozlov, R. Seto, S. N. White, X. He, V. Peresedov, F. Plasil, A. Isupov, S. S. Ryu, H. Masui, J. E. Frantz, A. Glenn, R. Azmoun, D. Mukhopadhyay, and Y. Cobigo
- Subjects
Physics ,Quark ,Semileptonic decay ,Particle physics ,Photon ,Meson ,010308 nuclear & particles physics ,Electron spectra ,Nuclear Theory ,High Energy Physics::Phenomenology ,Hadron ,General Physics and Astronomy ,Electron ,01 natural sciences ,7. Clean energy ,Spectral line ,Nuclear physics ,0103 physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics - Abstract
The PHENIX experiment has measured midrapidity ([FORMULA: SEE TEXT]) transverse momentum spectra ([FORMULA: SEE TEXT]) of electrons as a function of centrality in Au+Au collisions at [FORMULA: SEE TEXT]. Contributions from photon conversions and from light hadron decays, mainly Dalitz decays of pi0 and eta mesons, were removed. The resulting nonphotonic electron spectra are primarily due to the semileptonic decays of hadrons carrying heavy quarks. Nuclear modification factors were determined by comparison to nonphotonic electrons in p+p collisions. A significant suppression of electrons at high pT is observed in central Au+Au collisions, indicating substantial energy loss of heavy quarks.
- Published
- 2006
29. Common suppression pattern of eta and pi0 mesons at high transverse momentum in Au + Au collisions at square root S(NN) = 200 GeV
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, J, Alexander, R, Amirikas, L, Aphecetche, S H, Aronson, R, Averbeck, T C, Awes, R, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, A, Bazilevsky, S, Belikov, Y, Berdnikov, S, Bhagavatula, J G, Boissevain, H, Borel, S, Borenstein, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, J-S, Chai, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, P, Constantin, D, d'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, O, Drapier, A, Drees, R, du Rietz, A, Durum, D, Dutta, Y V, Efremenko, K El, Chenawi, A, Enokizono, H, En'yo, S, Esumi, L, Ewell, D E, Fields, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, G, Gogiberidze, M, Gonin, J, Gosset, Y, Goto, R Granier, de Cassagnac, N, Grau, S V, Greene, M Grosse, Perdekamp, W, Guryn, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, R, Hayano, N, Hayashi, X, He, M, Heffner, T K, Hemmick, J M, Heuser, M, Hibino, H, Hiejima, J C, Hill, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Ichihara, V V, Ikonnikov, K, Imai, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, W Y, Jang, Y, Jeong, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, S, Kametani, N, Kamihara, J H, Kang, S S, Kapoor, K, Katou, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, D W, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kistenev, A, Kiyomichi, K, Kiyoyama, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, M, Kopytine, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, K, Kurita, Y, Kuroki, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, V, Ladygin, J G, Lajoie, A, Lebedev, S, Leckey, D M, Lee, S, Lee, M J, Leitch, X H, Li, H, Lim, A, Litvinenko, M X, Liu, Y, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, M D, Marx, H, Masui, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, F, Messer, Y, Miake, J, Milan, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, J L, Nagle, T, Nakamura, B K, Nandi, M, Nara, J, Newby, P, Nilsson, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, M, Ono, V, Onuchin, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, A, Parmar, S F, Pate, T, Peitzmann, J-C, Peng, V, Peresedov, C, Pinkenburg, R P, Pisani, F, Plasil, M L, Purschke, A K, Purwar, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, P, Rosnet, S S, Ryu, M E, Sadler, B, Sahlmueller, N, Saito, T, Sakaguchi, M, Sakai, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, M R, Shaw, T K, Shea, T-A, Shibata, K, Shigaki, T, Shiina, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, P, Tarján, J D, Tepe, T L, Thomas, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, S K, Tuli, H, Tydesjö, N, Tyurin, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, L, Villatte, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, F K, Wohn, C L, Woody, W, Xie, Y, Yang, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, S J, Zhou, and L, Zolin
- Abstract
Inclusive transverse momentum spectra of eta mesons have been measured within p(T) = 2-10 GeV/c at midrapidity by the PHENIX experiment in Au + Au collisions at square root S(NN) = 200 GeV. In central Au+Au the eta yields are significantly suppressed compared to peripheral Au + Au, d + Au, and p + p yields scaled by the corresponding number of nucleon-nucleon collisions. The magnitude, centrality, and p(T) dependence of the suppression is common, within errors, for eta and pi0. The ratio of eta to pi0 spectra at high p(T) amounts to 0.40R(eta/pi)00.48 for the three systems, in agreement with the world average measured in hadronic and nuclear reactions and, at large scaled momentum, in e+e- collisions.
- Published
- 2006
30. Single Electrons from Heavy-Flavor Decays inp+pCollisions ats=200 GeV
- Author
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N. N. Ajitanand, J. G. Boissevain, M. Issah, S. Batsouli, E. Vznuzdaev, Sean A. Kelly, K. Katou, T. Shiina, Viktor Veszpremi, A. Kiyomichi, C. Pinkenburg, Yi Liu, M. A. Volkov, M. Stepanov, G. Roche, S. Garpman, H. A. Gustafsson, L. Aphecetche, V. Ladygin, M. Gonin, R. E. Mischke, C. Zhang, Viktor Riabov, V. S. Pantuev, Takahiro Nakamura, S. Afanasiev, Senta Greene, M. Nara, M. Harvey, A. Ster, Junji Tojo, A. P.T. Palounek, C. A. Ogilvie, J. Chiba, J. Kang, T. K. Hemmick, M. Chiu, Ajit Kumar Mohanty, T. A. Shibata, K. Kiyoyama, M. Sakai, J. Gosset, T. L. Thomas, E. O'Brien, R. A. Soltz, S. Butsyk, Vladimir Samsonov, J. P. Sullivan, M. E. Sadler, B. D. Fox, F. Messer, S. Esumi, W. A. Zajc, V. Baublis, A. Denisov, Yasuo Miake, V. Cianciolo, Sergey Fokin, B. K. Nandi, K. Kurita, M. Sivertz, A. Hoover, M. Grosse Perdekamp, G. R. Young, I. Otterlund, X. He, S. Sawada, J. D. Tepe, A. Franz, G. C. Mishra, K. Okada, M. Heffner, H. W. Van Hecke, Ryugo S. Hayano, Norio Saito, L. Kochenda, H. En'yo, D. Isenhower, S. S. Kapoor, P. Constantin, M. J. Leitch, Takao Sakaguchi, Hiroaki Ohnishi, J. Milan, Y. Kuroki, W. Y. Jang, A. Durum, H. Tsuruoka, German Martinez, Y. Riabov, T. C. Awes, Wei Xie, Jun Kikuchi, Shih-Chang Lee, K. S. Sim, David Olle Rickard Silvermyr, Youngil Kwon, S. Yokkaichi, J. M. Heuser, G. Gogiberidze, Kenta Shigaki, A. Deshpande, V. Peresedov, C. Klein-Boesing, O. Dietzsch, S. Kametani, J. S. Chai, A. D. Frawley, H. J. Kim, J. L. Nagle, N. Kamihara, A. Devismes, C. L. Woody, F. Matathias, J. S. Haggerty, P. L. McGaughey, Dipanwita Dutta, David D'Enterria, T. Kohama, S. H. Aronson, B. Khachaturov, H. Buesching, A. Romana, A. Drees, J. M. Burward-Hoy, L. Sanfratello, H. Delagrange, A. S. Nyanin, K. Imai, T. Matsumoto, R. P. Pisani, S. Borenstein, Julia Velkovska, M. Rosati, Xingguo Li, V. Babintsev, P. Chand, W. Holzmann, D. S. Brown, H. Masui, S. S. Adler, G. S. Kyle, Jan Rak, W. Guryn, V. Bumazhnov, K. Ozawa, J. B. Choi, M. Velkovsky, Hideki Hamagaki, Y. I. Makdisi, M. Kopytine, S. Zhou, R. Granier de Cassagnac, L. Villatte, James Alexander, Joakim Nystrand, G. David, A. A. Vinogradov, Minghui Liu, Y. Jeong, R. Averbeck, Byung-Sik Hong, Nikolay Tyurin, S. P. Sorensen, C. H. Kuberg, Henrik Tydesjö, S. F. Pate, S. P. Stoll, Peter M. Nilsson, Kenneth Francis Read, Jiangyong Jia, Y. Goto, Charles Maguire, A. Bazilevsky, A. G. Litvinenko, E. P. Hartouni, Gerry Bunce, H. Kobayashi, Philippe Rosnet, P. Tarján, Agneta Oskarsson, S. Leckey, W. C. Chang, X. R. Wang, T. E. Miller, Y. Berdnikov, M. J. Tannenbaum, Alexandre Lebedev, D. M. Lee, Y. Akiba, R. Santo, A. Enokizono, S. Nagamiya, Kazuhiro Tanaka, A. Kozlov, Roy A. Lacey, R. du Rietz, Josh Moss, Klaus Johannes Reygers, R. Seto, V. V. Ikonnikov, S. N. White, V. Papavassiliou, J. G. Lajoie, T. Hachiya, D. Jouan, M. Tamai, D. Bucher, D. E. Fields, B. V. Jacak, E. Kistenev, K. N. Barish, I. J. Choi, M. Ono, A. K. Purwar, M. L. Brooks, Do-Won Kim, P. J. Kroon, S. Bathe, Dong-Hun Kim, Kensuke Homma, E. Melnikov, I. V. Sourikova, H. Torii, S. Chernichenko, H. Lim, B. Bassalleck, F. Mühlbacher, L. Ewell, A. G. Hansen, Shingo Sakai, J. T. Mitchell, Vladislav Manko, M. D. Marx, Y. Tanaka, N. Grau, T. Chujo, X. Camard, T. K. Shea, A. Parmar, Christine Angela Aidala, P. W. Stankus, W. E. Sondheim, S. Y. Fung, John Hill, K. Oyama, Toru Sugitate, François Fleuret, T. Ichihara, F. K. Wohn, T. K. Ghosh, Matthew G. Reuter, I. D. Ojha, Alexander Malakhov, L. S. Zolin, P. D. Barnes, A. Yanovich, Y. Watanabe, A. Soldatov, C. L. Silva, Masayasu Ishihara, Susumu Sato, M. Muniruzzaman, F. Staley, K. Tanida, V. I. Kochetkov, Alberto Baldisseri, Y. Yang, C. P. Singh, B. M. Johnson, Brian Cole, J. E. Frantz, S. C. Johnson, Y. J. Mao, T. Peitzmann, Herve Borel, Saskia Mioduszewski, M. J. Kweon, A. Glenn, Yves Roland Schutz, D. Pal, E. M. Takagui, R. S. Towell, N. Hayashi, R. Azmoun, C. Y. Chi, D. Mukhopadhyay, Y. Cobigo, I. Ravinovich, F. Plasil, A. Isupov, S. S. Ryu, Atsushi Taketani, V.A. Onuchin, S. Belikov, K. S. Joo, K. El Chenawi, M. R. Shaw, Martin Purschke, I. Tserruya, Yu. Efremenko, V. Singh, D. Kotchetkov, G. B. Kim, S. Bhagavatula, D. Koehler, Z. Fraenkel, R. K. Choudhury, Hirohiko Sato, S. K. Tuli, Alexander Milov, O. Drapier, Jason Newby, D. P. Morrison, J. Murata, V. E. Semenov, Jen-Chieh Peng, E. J. Desmond, Dong Jo Kim, Osamu Jinnouchi, M. Hibino, J. Park, R. Amirikas, I. E. Yushmanov, Alexei Khanzadeev, N. Bruner, E. Stenlund, and E. H. Kim
- Subjects
Quark ,Physics ,Quantum chromodynamics ,Particle physics ,Meson ,010308 nuclear & particles physics ,High Energy Physics::Lattice ,High Energy Physics::Phenomenology ,General Physics and Astronomy ,Perturbative QCD ,01 natural sciences ,Charm quark ,Pair production ,0103 physical sciences ,High Energy Physics::Experiment ,Charm (quantum number) ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider - Abstract
The invariant differential cross section for inclusive electron production in p+p collisions at [FORMULA: SEE TEXT] has been measured by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider over the transverse momentum range 0.4
- Published
- 2006
31. J/ψProduction and Nuclear Effects ford+Auandp+pCollisions atsNN=200 GeV
- Author
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M. Grosse Perdekamp, A. Pierson, David Olle Rickard Silvermyr, Sean A. Kelly, Viktor Veszpremi, A. Devismes, Senta Greene, F. Kajihara, V. Bumazhnov, M. P. Comets, E. O'Brien, Martin Purschke, H. Delagrange, Y. J. Mao, Robert F. Hobbs, S. Kametani, Charles Maguire, S. Leckey, J. T. Mitchell, Maya Hachiya Shimomura, S. Zhou, S. Esumi, Alexei Khanzadeev, P. Tarján, A. Kiss, J. E. Frantz, D. Kotchetkov, D. E. Fields, B. V. Jacak, Josh Moss, Pàl Hidas, J. H. Kang, J. S. Haggerty, A. Romana, M. Chiu, Ajit Kumar Mohanty, N. Bruner, E. Stenlund, Y. Watanabe, W. C. Chang, Y. I. Makdisi, Z. Fraenkel, T. A. Shibata, T. L. Thomas, A. K. Purwar, W. A. Zajc, Roy A. Lacey, Herve Borel, S. S. Adler, G. S. Kyle, Vladislav Manko, R. Kohara, Henner Buesching, S. Y. Fung, S. Sawada, A. Franz, N. Willis, James Alexander, S. Butsyk, A. Glenn, C. L. Woody, E. Kistenev, V. Baublis, K. Aoki, Vladimir Samsonov, A. Denisov, I. Otterlund, V-N. Tram, D. Isenhower, V. Cianciolo, R. K. Choudhury, P. Chand, K. S. Sim, J. M. Burward-Hoy, T. Chujo, M. Gonin, V.N. Penev, K. Kurita, H. Pereira, German Martinez, X. Camard, B. Khachaturov, A. Soldatov, S. P. Stoll, K. Tanida, V. L. Rykov, N. N. Ajitanand, Ryugo S. Hayano, A. V. Kazantsev, L. Aphecetche, Takeo Kawabata, S. Belikov, K. S. Joo, M. C. McCain, Sergey Fokin, Y. J. Kwon, H. Hiejima, B. Espagnon, S. S.E. Rosendahl, Motoi Inaba, V. I. Kochetkov, R. S. Towell, T. Matsumoto, Takahiro Nakamura, K. Hasuko, R. Averbeck, Byung-Sik Hong, Tamas Ferenc Csorgo, Christine Angela Aidala, T. E. Miller, John Hill, K. Oyama, E. T. Atomssa, G. Bunce, I. Ravinovich, M. Rosati, T. Horaguchi, A. Bazilevsky, Mate Csanad, L. Sanfratello, Akio Kiyomichi, R. Santo, J. L. Nagle, A. Hoover, M. J. Tannenbaum, Hiroyuki Okada, J. L. Drachenberg, H. Kobayashi, Gerd Joachim Kunde, A. Durum, Y. Riabov, M. Velkovsky, Philippe Rosnet, S. Bathe, Joakim Nystrand, K. Ozawa, K. Imai, Agneta Oskarsson, I. Shein, V. V. Ikonnikov, D. S. Brown, D. Jouan, H. Pei, S. P. Sorensen, Kenta Shigaki, A. Isupov, S. S. Ryu, Toru Sugitate, Kensuke Homma, L. D. Isenhower, S. Afanasiev, A. Ster, V. S. Pantuev, Alberto Baldisseri, Y. Akiba, A. A. Vinogradov, Ferenc Deák, N. Kamihara, Henrik Tydesjö, Alexandre Lebedev, J. G. Boissevain, David D'Enterria, Yoichiro Fukao, S. Chernichenko, Jan Rak, S. Nagamiya, H. A. Gustafsson, Kazuhiro Tanaka, F. Matathias, R. Armendariz, M. Harvey, H. Lim, D. Bucher, Junji Tojo, T. C. Awes, Jiangyong Jia, S. C. Johnson, D. M. Lee, Y. Goto, J. G. Lajoie, Masashi Kaneta, K. Katou, R. Granier de Cassagnac, Xiaopeng Zong, Jun Kikuchi, Klaus Johannes Reygers, B. Bassalleck, T. Hachiya, M. Inuzuka, Hideki Hamagaki, M. J. Kweon, A. S. Nyanin, G. David, C. L. Silva, A. Drees, Y. Le Bornec, K. Okada, C. H. Kuberg, M. Konno, R. P. Pisani, J. Chiba, C. Pinkenburg, Masayasu Ishihara, M. A. Volkov, Ahmed Al-Jamel, Ch. Finck, Nikolay Tyurin, M. Heffner, P. L. McGaughey, C. Zhang, C. Y. Chi, H. En'yo, Susumu Sato, P. Constantin, M. J. Leitch, A. Taranenko, M. Muniruzzaman, G. C. Mishra, Jason Newby, S. F. Pate, H. J. Kim, I. J. Choi, Hiroaki Ohnishi, François Fleuret, F. Staley, C. A. Ogilvie, M. Stepanov, E. H. Kim, G. Roche, Takao Sakaguchi, T. K. Hemmick, Atsushi Taketani, Yasuo Miake, C. Klein-Boesing, J. Gosset, J. P. Sullivan, J. M. Qualls, Anne Marie Sickles, A. D. Frawley, S. N. White, X. R. Wang, N. Grau, M. T. Bjorndal, L. Kochenda, E. J. Desmond, Viktor Riabov, Jean-Pierre Cussonneau, M. Issah, M. Togawa, S. H. Aronson, V. Papavassiliou, J. Park, Florian Bauer, S. Yokkaichi, J. M. Heuser, G. R. Young, Sébastien Gadrat, W. Holzmann, P. W. Stankus, A. G. Hansen, Shingo Sakai, Y. Tsuchimoto, E. Vznuzdaev, Saskia Mioduszewski, S. Batsouli, Minghui Liu, I. E. Yushmanov, Y. Tanaka, Xingguo Li, W. E. Sondheim, T. K. Shea, Kenneth Francis Read, P. J. Kroon, O. Dietzsch, H. W. Van Hecke, B. Komkov, D. Mukhopadhyay, T. Ichihara, Jen-Chieh Peng, Wei Xie, B. D. Fox, F. K. Wohn, A. Deshpande, Yves Roland Schutz, Y. Cobigo, Norio Saito, M. A. L. Leite, Dipanwita Dutta, A. P.T. Palounek, D. Pal, E. M. Takagui, K. Das, E. P. Hartouni, V. Babintsev, Dong Jo Kim, Osamu Jinnouchi, B. M. Johnson, Brian Cole, I. Tserruya, Yu. Efremenko, G. B. Kim, Hirohiko Sato, Marie Germain, J. Velkovska, A. G. Litvinenko, A. Kozlov, R. Seto, Alexander Milov, V. Dzhordzhadze, S. Takagi, K. N. Barish, T. J. Uam, M. L. Brooks, O. Drapier, X. He, V. Peresedov, E. R. Kinney, D. P. Morrison, H. Masui, V. E. Semenov, J. Zimányi, Matthew G. Reuter, I. D. Ojha, Alexander Malakhov, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, I. V. Sourikova, H. Torii, and R. A. Soltz
- Subjects
Physics ,010308 nuclear & particles physics ,Scattering ,High Energy Physics::Phenomenology ,General Physics and Astronomy ,Deep inelastic scattering ,01 natural sciences ,Gluon ,Nuclear physics ,Deuterium ,0103 physical sciences ,Transverse momentum ,High Energy Physics::Experiment ,Production (computer science) ,Rapidity ,Absorption (logic) ,Nuclear Experiment ,010306 general physics - Abstract
J/{psi} production in d+Au and p+p collisions at {radical}(s{sub NN})=200 GeV has been measured by the PHENIX experiment at rapidities -2.2
- Published
- 2006
32. Measurement of Transverse Single-Spin Asymmetries for Midrapidity Production of Neutral Pions and Charged Hadrons in Polarizedp+pCollisions ats=200 GeV
- Author
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S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas, L. Aphecetche, S. H. Aronson, R. Averbeck, T. C. Awes, R. Azmoun, V. Babintsev, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, F. Bauer, A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, J. G. Boissevain, H. Borel, S. Borenstein, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, J.-S. Chai, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, P. Constantin, D. d’Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, A. Devismes, O. Dietzsch, O. Drapier, A. Drees, K. A. Drees, R. du Rietz, A. Durum, D. Dutta, Y. V. Efremenko, K. El Chenawi, A. Enokizono, H. En’yo, S. Esumi, L. Ewell, D. E. Fields, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, S.-Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, W. Guryn, H.-Å. Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, R. Hayano, N. Hayashi, X. He, M. Heffner, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Ichihara, V. V. Ikonnikov, K. Imai, D. Isenhower, M. Ishihara, M. Issah, A. Isupov, B. V. Jacak, W. Y. Jang, Y. Jeong, J. Jia, O. Jinnouchi, B. M. Johnson, S. C. Johnson, K. S. Joo, D. Jouan, S. Kametani, N. Kamihara, J. H. Kang, S. S. Kapoor, K. Katou, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. H. Kim, D. J. Kim, D. W. Kim, E. Kim, G.-B. Kim, H. J. Kim, E. Kistenev, A. Kiyomichi, K. Kiyoyama, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, M. Kopytine, D. Kotchetkov, A. Kozlov, P. J. Kroon, C. H. Kuberg, K. Kurita, Y. Kuroki, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, V. Ladygin, J. G. Lajoie, A. Lebedev, S. Leckey, D. M. Lee, S. Lee, M. J. Leitch, X. H. Li, H. Lim, A. Litvinenko, M. X. Liu, Y. Liu, C. F. Maguire, Y. I. Makdisi, A. Malakhov, V. I. Manko, Y. Mao, G. Martinez, M. D. Marx, H. Masui, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, F. Messer, Y. Miake, J. Milan, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, D. Mukhopadhyay, M. Muniruzzaman, J. Murata, S. Nagamiya, J. L. Nagle, T. Nakamura, B. K. Nandi, M. Nara, J. Newby, P. Nilsson, A. S. Nyanin, J. Nystrand, E. O’Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, K. Okada, M. Ono, V. Onuchin, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A. P. T. Palounek, V. Pantuev, V. Papavassiliou, J. Park, A. Parmar, S. F. Pate, T. Peitzmann, J.-C. Peng, V. Peresedov, C. Pinkenburg, R. P. Pisani, F. Plasil, M. L. Purschke, A. K. Purwar, J. Rak, I. Ravinovich, K. F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, P. Rosnet, S. S. Ryu, M. E. Sadler, N. Saito, T. Sakaguchi, M. Sakai, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H. D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, M. R. Shaw, T. K. Shea, T.-A. Shibata, K. Shigaki, T. Shiina, C. L. Silva, D. Silvermyr, K. S. Sim, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, J. P. Sullivan, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, P. Tarján, J. D. Tepe, T. L. Thomas, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, S. K. Tuli, H. Tydesjö, N. Tyurin, H. W. van Hecke, J. Velkovska, M. Velkovsky, V. Veszprémi, L. Villatte, A. A. Vinogradov, M. A. Volkov, E. Vznuzdaev, X. R. Wang, Y. Watanabe, S. N. White, F. K. Wohn, C. L. Woody, W. Xie, Y. Yang, A. Yanovich, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, C. Zhang, S. Zhou, S. J. Zhou, and L. Zolin
- Subjects
Quantum chromodynamics ,Physics ,Range (particle radiation) ,Particle physics ,Proton ,010308 nuclear & particles physics ,media_common.quotation_subject ,Nuclear Theory ,Hadron ,General Physics and Astronomy ,Perturbative QCD ,01 natural sciences ,Asymmetry ,Nuclear physics ,Pion ,0103 physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics ,Spin-½ ,media_common - Abstract
Transverse single-spin asymmetries to probe the transverse-spin structure of the proton have been measured for neutral pions and nonidentified charged hadrons from polarized proton-proton collisions at midrapidity and root s = 200 GeV. The data cover a transverse momentum (pT) range 1.0-5.0 GeV/c for neutral pions and 0.5-5.0 GeV/c for charged hadrons, at a Feynman-x value of approximately zero. The asymmetries seen in this previously unexplored kinematic region are consistent with zero within errors of a few percent. In addition, the inclusive charged hadron cross section at midrapidity from 0.5 < P-T < 7.0 GeV/c is presented and compared to next-to-leading order perturbative QCD ( pQCD) calculations. Successful description of the unpolarized cross section above similar to 2 GeV/c suggests that pQCD is applicable in the interpretation of the asymmetry results in the relevant kinematic range.
- Published
- 2005
33. Nuclear modification of electron spectra and implications for heavy quark energy loss in Au+Au collisions at [FORMULA: SEE TEXT]
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, J, Alexander, R, Amirikas, L, Aphecetche, S H, Aronson, R, Averbeck, T C, Awes, R, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, A, Bazilevsky, S, Belikov, Y, Berdnikov, S, Bhagavatula, J G, Boissevain, H, Borel, S, Borenstein, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, J-S, Chai, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, P, Constantin, D, d'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, O, Drapier, A, Drees, R, du Rietz, A, Durum, D, Dutta, Y V, Efremenko, J, Egdemir, K, El Chenawi, A, Enokizono, H, En'yo, S, Esumi, L, Ewell, D E, Fields, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, G, Gogiberidze, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, W, Guryn, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, R, Hayano, N, Hayashi, X, He, M, Heffner, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Ichihara, V V, Ikonnikov, K, Imai, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, W Y, Jang, Y, Jeong, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, S, Kametani, N, Kamihara, J H, Kang, S S, Kapoor, K, Katou, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, D W, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kistenev, A, Kiyomichi, K, Kiyoyama, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, M, Kopytine, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, K, Kurita, Y, Kuroki, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, V, Ladygin, J G, Lajoie, A, Lebedev, S, Leckey, D M, Lee, S, Lee, M J, Leitch, X H, Li, H, Lim, A, Litvinenko, M X, Liu, Y, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, M D, Marx, H, Masui, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, F, Messer, Y, Miake, J, Milan, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, J L, Nagle, T, Nakamura, B K, Nandi, M, Nara, J, Newby, P, Nilsson, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, M, Ono, V, Onuchin, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, A, Parmar, S F, Pate, T, Peitzmann, J-C, Peng, V, Peresedov, C, Pinkenburg, R P, Pisani, F, Plasil, M L, Purschke, A K, Purwar, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, P, Rosnet, S S, Ryu, M E, Sadler, N, Saito, T, Sakaguchi, M, Sakai, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, M R, Shaw, T K, Shea, T-A, Shibata, K, Shigaki, T, Shiina, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, P, Tarján, J D, Tepe, T L, Thomas, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, S K, Tuli, H, Tydesjö, N, Tyurin, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, L, Villatte, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, F K, Wohn, C L, Woody, W, Xie, Y, Yang, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, S J, Zhou, and L, Zolin
- Abstract
The PHENIX experiment has measured midrapidity ([FORMULA: SEE TEXT]) transverse momentum spectra ([FORMULA: SEE TEXT]) of electrons as a function of centrality in Au+Au collisions at [FORMULA: SEE TEXT]. Contributions from photon conversions and from light hadron decays, mainly Dalitz decays of pi0 and eta mesons, were removed. The resulting nonphotonic electron spectra are primarily due to the semileptonic decays of hadrons carrying heavy quarks. Nuclear modification factors were determined by comparison to nonphotonic electrons in p+p collisions. A significant suppression of electrons at high pT is observed in central Au+Au collisions, indicating substantial energy loss of heavy quarks.
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- 2005
34. Measurement of identified and inclusive photon second-harmonic parameter and implications for direct photon production in [FORMULA: SEE TEXT] Au+Au
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, J, Alexander, R, Amirikas, L, Aphecetche, S H, Aronson, R, Averbeck, T C, Awes, R, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, A, Bazilevsky, S, Belikov, Y, Berdnikov, S, Bhagavatula, J G, Boissevain, H, Borel, S, Borenstein, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, J-S, Chai, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, P, Constantin, D, d'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, O, Drapier, A, Drees, R, du Rietz, A, Durum, D, Dutta, Y V, Efremenko, K, El Chenawi, A, Enokizono, H, En'yo, S, Esumi, L, Ewell, D E, Fields, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, G, Gogiberidze, M, Gonin, J, Gosset, Y, Goto, R Granier, de Cassagnac, N, Grau, S V, Greene, M Grosse, Perdekamp, W, Guryn, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, R, Hayano, N, Hayashi, X, He, M, Heffner, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Ichihara, V V, Ikonnikov, K, Imai, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, W Y, Jang, Y, Jeong, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, S, Kametani, N, Kamihara, M, Kaneta, J H, Kang, S S, Kapoor, K, Katou, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, D W, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kistenev, A, Kiyomichi, K, Kiyoyama, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, M, Kopytine, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, K, Kurita, Y, Kuroki, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, V, Ladygin, J G, Lajoie, A, Lebedev, S, Leckey, D M, Lee, S, Lee, M J, Leitch, X H, Li, H, Lim, A, Litvinenko, M X, Liu, Y, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, M D, Marx, H, Masui, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, F, Messer, Y, Miake, J, Milan, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, J L, Nagle, T, Nakamura, B K, Nandi, M, Nara, J, Newby, P, Nilsson, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, M, Ono, V, Onuchin, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, A, Parmar, S F, Pate, T, Peitzmann, J-C, Peng, V, Peresedov, C, Pinkenburg, R P, Pisani, F, Plasil, M L, Purschke, A K, Purwar, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, P, Rosnet, S S, Ryu, M E, Sadler, N, Saito, T, Sakaguchi, M, Sakai, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, M R, Shaw, T K, Shea, T-A, Shibata, K, Shigaki, T, Shiina, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, P, Tarján, J D, Tepe, T L, Thomas, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, S K, Tuli, H, Tydesjö, N, Tyurin, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, L, Villatte, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, F K, Wohn, C L, Woody, W, Xie, Y, Yang, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, S J, Zhou, and L, Zolin
- Abstract
The azimuthal distribution of identified pi0 and inclusive photons has been measured in [FORMULA: SEE TEXT] Au+Au collisions with the PHENIX experiment at the Relativistic Heavy-Ion Collider (RHIC). The second-harmonic parameter (nu2) was measured to describe the observed anisotropy of the azimuthal distribution. The measured inclusive photon is consistent with the value expected for the photons from hadron decay and is also consistent with the lack of direct photon signal over the measured pT range 1-6 GeV/c. An attempt is made to extract nu2 of direct photons.
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- 2005
35. Single electrons from heavy-flavor decays in collisions at
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, J, Alexander, R, Amirikas, L, Aphecetche, S H, Aronson, R, Averbeck, T C, Awes, R, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, A, Bazilevsky, S, Belikov, Y, Berdnikov, S, Bhagavatula, J G, Boissevain, H, Borel, S, Borenstein, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, J-S, Chai, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, P, Constantin, D, d'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, O, Drapier, A, Drees, R, du Rietz, A, Durum, D, Dutta, Y V, Efremenko, K, El Chenawi, A, Enokizono, H, En'yo, S, Esumi, L, Ewell, D E, Fields, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, G, Gogiberidze, M, Gonin, J, Gosset, Y, Goto, R Granier, de Cassagnac, N, Grau, S V, Greene, M Grosse, Perdekamp, W, Guryn, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, R, Hayano, N, Hayashi, X, He, M, Heffner, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Ichihara, V V, Ikonnikov, K, Imai, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, W Y, Jang, Y, Jeong, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, S, Kametani, N, Kamihara, J H, Kang, S S, Kapoor, K, Katou, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, D W, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kistenev, A, Kiyomichi, K, Kiyoyama, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, M, Kopytine, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, K, Kurita, Y, Kuroki, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, V, Ladygin, J G, Lajoie, A, Lebedev, S, Leckey, D M, Lee, S, Lee, M J, Leitch, X H, Li, H, Lim, A, Litvinenko, M X, Liu, Y, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, M D, Marx, H, Masui, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, F, Messer, Y, Miake, J, Milan, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, J L, Nagle, T, Nakamura, B K, Nandi, M, Nara, J, Newby, P, Nilsson, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, M, Ono, V, Onuchin, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, A, Parmar, S F, Pate, T, Peitzmann, J-C, Peng, V, Peresedov, C, Pinkenburg, R P, Pisani, F, Plasil, M L, Purschke, A K, Purwar, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, P, Rosnet, S S, Ryu, M E, Sadler, N, Saito, T, Sakaguchi, M, Sakai, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, M R, Shaw, T K, Shea, T-A, Shibata, K, Shigaki, T, Shiina, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, P, Tarján, J D, Tepe, T L, Thomas, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, S K, Tuli, H, Tydesjö, N, Tyurin, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, L, Villatte, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, F K, Wohn, C L, Woody, W, Xie, Y, Yang, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, S J, Zhou, and L, Zolin
- Abstract
The invariant differential cross section for inclusive electron production in p+p collisions at [FORMULA: SEE TEXT] has been measured by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider over the transverse momentum range 0.4or=pTOR=5.0 GeV/c in the central rapidity region ([FORMULA: SEE TEXT]). The contribution to the inclusive electron spectrum from semileptonic decays of hadrons carrying heavy flavor, i.e., charm quarks or, at high , bottom quarks, is determined via three independent methods. The resulting electron spectrum from heavy-flavor decays is compared to recent leading and next-to-leading order perturbative QCD calculations. The total cross section of charm quark-antiquark pair production is determined to be [FORMULA: SEE TEXT].
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- 2005
36. J/psi production and nuclear effects for d + Au and p + p collisions at square root of S(NN) = 200 GeV
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, A, Al-Jamel, J, Alexander, K, Aoki, L, Aphecetche, R, Armendariz, S H, Aronson, E T, Atomssa, R, Averbeck, T C, Awes, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, F, Bauer, A, Bazilevsky, S, Belikov, M T, Bjorndal, J G, Boissevain, H, Borel, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, M P, Comets, P, Constantin, M, Csanád, T, Csörgo, J P, Cussonneau, D, d'Enterria, K, Das, G, David, F, Deák, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, J L, Drachenberg, O, Drapier, A, Drees, A, Durum, D, Dutta, V, Dzhordzhadze, Y V, Efremenko, H, En'yo, B, Espagnon, S, Esumi, D E, Fields, C, Finck, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, Y, Fukao, S-Y, Fung, S, Gadrat, M, Germain, A, Glenn, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, K, Hasuko, R, Hayano, X, He, M, Heffner, T K, Hemmick, J M, Heuser, P, Hidas, H, Hiejima, J C, Hill, R, Hobbs, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Horaguchi, T, Ichihara, V V, Ikonnikov, K, Imai, M, Inaba, M, Inuzuka, D, Isenhower, L, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, F, Kajihara, S, Kametani, N, Kamihara, M, Kaneta, J H, Kang, K, Katou, T, Kawabata, A V, Kazantsev, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kinney, A, Kiss, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, R, Kohara, B, Komkov, M, Konno, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, G J, Kunde, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, Y, Le Bornec, A, Lebedev, S, Leckey, D M, Lee, M J, Leitch, M A L, Leite, X H, Li, H, Lim, A, Litvinenko, M X, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, H, Masui, F, Matathias, T, Matsumoto, M C, McCain, P L, McGaughey, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, D, Mukhopadhyay, M, Muniruzzaman, S, Nagamiya, J L, Nagle, T, Nakamura, J, Newby, A S, Nyanin, J, Nystrand, E, O'brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, H, Okada, K, Okada, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, W J, Park, S F, Pate, H, Pei, V, Penev, J-C, Peng, H, Pereira, V, Peresedov, A, Pierson, C, Pinkenburg, R P, Pisani, M L, Purschke, A K, Purwar, J M, Qualls, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, S S E, Rosendahl, P, Rosnet, V L, Rykov, S S, Ryu, N, Saito, T, Sakaguchi, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, A, Sickles, C L, Silva, D, Silvermyr, K S, Sim, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, S, Takagi, E M, Takagui, A, Taketani, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, A, Taranenko, P, Tarján, T L, Thomas, M, Togawa, J, Tojo, H, Torii, R S, Towell, V-N, Tram, I, Tserruya, Y, Tsuchimoto, H, Tydesjö, N, Tyurin, T J, Uam, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, N, Willis, F K, Wohn, C L, Woody, W, Xie, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, J, Zimányi, L, Zolin, and X, Zong
- Abstract
J/psi production in d + Au and p + p collisions at square root of S(NN) = 200 GeV has been measured by the PHENIX experiment at rapidities -2.2y+2.4. The cross sections and nuclear dependence of J/psi production versus rapidity, transverse momentum, and centrality are obtained and compared to lower energy p + A results and to theoretical models. The observed nuclear dependence in d + Au collisions is found to be modest, suggesting that the absorption in the final state is weak and the shadowing of the gluon distributions is small and consistent with Dokshitzer-Gribov-Lipatov-Altarelli-Parisi-based parametrizations that fit deep-inelastic scattering and Drell-Yan data at lower energies.
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- 2005
37. Measurement of transverse single-spin asymmetries for midrapidity production of neutral pions and charged hadrons in polarized p + p collisions at square root(s) = 200 GeV
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, J, Alexander, R, Amirikas, L, Aphecetche, S H, Aronson, R, Averbeck, T C, Awes, R, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, F, Bauer, A, Bazilevsky, S, Belikov, Y, Berdnikov, S, Bhagavatula, J G, Boissevain, H, Borel, S, Borenstein, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, J-S, Chai, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, P, Constantin, D, d'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, O, Drapier, A, Drees, K A, Drees, R, du Rietz, A, Durum, D, Dutta, Y V, Efremenko, K, El Chenawi, A, Enokizono, H, En'yo, S, Esumi, L, Ewell, D E, Fields, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, G, Gogiberidze, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, W, Guryn, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, R, Hayano, N, Hayashi, X, He, M, Heffner, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Ichihara, V V, Ikonnikov, K, Imai, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, W Y, Jang, Y, Jeong, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, S, Kametani, N, Kamihara, J H, Kang, S S, Kapoor, K, Katou, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, D W, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kistenev, A, Kiyomichi, K, Kiyoyama, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, M, Kopytine, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, K, Kurita, Y, Kuroki, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, V, Ladygin, J G, Lajoie, A, Lebedev, S, Leckey, D M, Lee, S, Lee, M J, Leitch, X H, Li, H, Lim, A, Litvinenko, M X, Liu, Y, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, M D, Marx, H, Masui, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, F, Messer, Y, Miake, J, Milan, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, J L, Nagle, T, Nakamura, B K, Nandi, M, Nara, J, Newby, P, Nilsson, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, M, Ono, V, Onuchin, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, A, Parmar, S F, Pate, T, Peitzmann, J-C, Peng, V, Peresedov, C, Pinkenburg, R P, Pisani, F, Plasil, M L, Purschke, A K, Purwar, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, P, Rosnet, S S, Ryu, M E, Sadler, N, Saito, T, Sakaguchi, M, Sakai, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, M R, Shaw, T K, Shea, T-A, Shibata, K, Shigaki, T, Shiina, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, P, Tarján, J D, Tepe, T L, Thomas, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, S K, Tuli, H, Tydesjö, N, Tyurin, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, L, Villatte, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, F K, Wohn, C L, Woody, W, Xie, Y, Yang, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, S J, Zhou, and L, Zolin
- Abstract
Transverse single-spin asymmetries to probe the transverse-spin structure of the proton have been measured for neutral pions and nonidentified charged hadrons from polarized proton-proton collisions at midrapidity and square root(s) = 200 GeV. The data cover a transverse momentum (pT) range 1.0-5.0 GeV/c for neutral pions and 0.5-5.0 GeV/c for charged hadrons, at a Feynman-x value of approximately zero. The asymmetries seen in this previously unexplored kinematic region are consistent with zero within errors of a few percent. In addition, the inclusive charged hadron cross section at midrapidity from 0.5pT7.0 GeV/c is presented and compared to next-to-leading order perturbative QCD (pQCD) calculations. Successful description of the unpolarized cross section above approximately 2 GeV/c suggests that pQCD is applicable in the interpretation of the asymmetry results in the relevant kinematic range.
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- 2005
38. Dense-medium modifications to jet-induced hadron pair distributions in Au+Au collisions at sqrt s NN=200 GeV
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, J, Alexander, R, Amirikas, L, Aphecetche, S H, Aronson, R, Averbeck, T C, Awes, R, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, A, Bazilevsky, S, Belikov, Y, Berdnikov, S, Bhagavatula, J G, Boissevain, H, Borel, S, Borenstein, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, J-S, Chai, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, P, Constantin, D, d'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, O, Drapier, A, Drees, R, du Rietz, A, Durum, D, Dutta, Y V, Efremenko, K, El Chenawi, A, Enokizono, H, En'yo, S, Esumi, L, Ewell, D E, Fields, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, G, Gogiberidze, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, W, Guryn, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, R, Hayano, N, Hayashi, X, He, M, Heffner, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Ichihara, V V, Ikonnikov, K, Imai, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, W Y, Jang, Y, Jeong, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, S, Kametani, N, Kamihara, J H, Kang, S S, Kapoor, K, Katou, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, D W, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kistenev, A, Kiyomichi, K, Kiyoyama, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, M, Kopytine, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, K, Kurita, Y, Kuroki, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, V, Ladygin, J G, Lajoie, A, Lebedev, S, Leckey, D M, Lee, S, Lee, M J, Leitch, X H, Li, H, Lim, A, Litvinenko, M X, Liu, Y, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, M D, Marx, H, Masui, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, F, Messer, Y, Miake, J, Milan, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, J L, Nagle, T, Nakamura, B K, Nandi, M, Nara, J, Newby, P, Nilsson, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, M, Ono, V, Onuchin, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, A, Parmar, S F, Pate, T, Peitzmann, J-C, Peng, V, Peresedov, C, Pinkenburg, R P, Pisani, F, Plasil, M L, Purschke, A K, Purwar, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, P, Rosnet, S S, Ryu, M E, Sadler, N, Saito, T, Sakaguchi, M, Sakai, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, M R, Shaw, T K, Shea, T-A, Shibata, K, Shigaki, T, Shiina, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, P, Tarján, J D, Tepe, T L, Thomas, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, S K, Tuli, H, Tydesjö, N, Tyurin, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, L, Villatte, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, F K, Wohn, C L, Woody, W, Xie, Y, Yang, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, S J, Zhou, and L, Zolin
- Abstract
Azimuthal correlations of jet-induced high-p(T) charged hadron pairs are studied at midrapidity in Au+Au collisions at sqrt[s(NN)]=200 GeV. The distribution of jet-associated partner hadrons (1.0p(T)2.5 GeV/c) per trigger hadron (2.5p(T)4.0 GeV/c) is found to vary with collision centrality, in both shape and yield, indicating a significant effect of the nuclear collision medium on the jet fragmentation process.
- Published
- 2005
39. Centrality Dependence of Direct Photon Production inSNN=200 GeVAu+AuCollisions
- Author
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S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas, L. Aphecetche, S. H. Aronson, R. Averbeck, T. C. Awes, R. Azmoun, V. Babintsev, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, J. G. Boissevain, H. Borel, S. Borenstein, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, J.-S. Chai, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, P. Constantin, D. d’Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, A. Devismes, O. Dietzsch, O. Drapier, A. Drees, R. du Rietz, A. Durum, D. Dutta, Y. V. Efremenko, K. El Chenawi, A. Enokizono, H. En’yo, S. Esumi, L. Ewell, D. E. Fields, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, S.-Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, W. Guryn, H.-Å. Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, R. Hayano, N. Hayashi, X. He, M. Heffner, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Ichihara, V. V. Ikonnikov, K. Imai, D. Isenhower, M. Ishihara, M. Issah, A. Isupov, B. V. Jacak, W. Y. Jang, Y. Jeong, J. Jia, O. Jinnouchi, B. M. Johnson, S. C. Johnson, K. S. Joo, D. Jouan, S. Kametani, N. Kamihara, J. H. Kang, S. S. Kapoor, K. Katou, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. H. Kim, D. J. Kim, D. W. Kim, E. Kim, G.-B. Kim, H. J. Kim, E. Kistenev, A. Kiyomichi, K. Kiyoyama, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, M. Kopytine, D. Kotchetkov, A. Kozlov, P. J. Kroon, C. H. Kuberg, K. Kurita, Y. Kuroki, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, V. Ladygin, J. G. Lajoie, A. Lebedev, S. Leckey, D. M. Lee, S. Lee, M. J. Leitch, X. H. Li, H. Lim, A. Litvinenko, M. X. Liu, Y. Liu, C. F. Maguire, Y. I. Makdisi, A. Malakhov, V. I. Manko, Y. Mao, G. Martinez, M. D. Marx, H. Masui, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, F. Messer, Y. Miake, J. Milan, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, D. Mukhopadhyay, M. Muniruzzaman, J. Murata, S. Nagamiya, J. L. Nagle, T. Nakamura, B. K. Nandi, M. Nara, J. Newby, P. Nilsson, A. S. Nyanin, J. Nystrand, E. O’Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, K. Okada, M. Ono, V. Onuchin, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A. P. T. Palounek, V. Pantuev, V. Papavassiliou, J. Park, A. Parmar, S. F. Pate, T. Peitzmann, J.-C. Peng, V. Peresedov, C. Pinkenburg, R. P. Pisani, F. Plasil, M. L. Purschke, A. K. Purwar, J. Rak, I. Ravinovich, K. F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, P. Rosnet, S. S. Ryu, M. E. Sadler, N. Saito, T. Sakaguchi, M. Sakai, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H. D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, M. R. Shaw, T. K. Shea, T.-A. Shibata, K. Shigaki, T. Shiina, C. L. Silva, D. Silvermyr, K. S. Sim, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, J. P. Sullivan, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, P. Tarján, J. D. Tepe, T. L. Thomas, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, S. K. Tuli, H. Tydesjö, N. Tyurin, H. W. van Hecke, J. Velkovska, M. Velkovsky, V. Veszprémi, L. Villatte, A. A. Vinogradov, M. A. Volkov, E. Vznuzdaev, X. R. Wang, Y. Watanabe, S. N. White, F. K. Wohn, C. L. Woody, W. Xie, Y. Yang, A. Yanovich, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, C. Zhang, S. Zhou, S. J. Zhou, and L. Zolin
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Quantum chromodynamics ,Physics ,Particle physics ,Photon ,010308 nuclear & particles physics ,General Physics and Astronomy ,Order (ring theory) ,01 natural sciences ,7. Clean energy ,Photon yield ,Nuclear physics ,0103 physical sciences ,Production (computer science) ,Nuclear Experiment ,010306 general physics ,Centrality - Abstract
The first measurement of direct photons in Au+Au collisions at {radical}(s{sub NN})=200 GeV is presented. The direct photon signal is extracted as a function of the Au+Au collision centrality and compared to next-to-leading order perturbative quantum chromodynamics calculations. The direct photon yield is shown to scale with the number of nucleon-nucleon collisions for all centralities.
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- 2005
40. Measurement of the tensor structure function b1 of the deuteron
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M. Vogt, H. Ohsuga, G. Gapienko, M. C. Simani, A. Rostomyan, A. R. Reolon, A. Avetissian, A. Tkabladze, B. D. Fox, G. Schnell, P. E. Reimer, M. Henoch, K. Oganessyan, Hidekazu Tanaka, H. E. Jackson, V. G. Krivokhijine, Gharibyan, T. A. Shibata, R.O. Avakian, E. Devitsin, W. Augustyniak, Erika Garutti, M. Stancari, U. Stosslein, L. Lagamba, Z. Akopov, J. Seele, S. Bernreuther, Shutov, Korotkov, A. Brull, B. Seitz, B. Hommez, J. Wilbert, Arne Vandenbroucke, Riccardo Fabbri, Di Nezza P, Muccifora, Michael Tytgat, M. Demey, Gapienko, I. M. Gregor, Alessandra Fantoni, M. Hoek, Y. Holler, S. Taroian, G. Graw, A. Andrus, W.-D. Nowak, Klaus Rith, D. Heesbeen, Mexner, G. Iarygin, B. Tchuiko, M. Kopytin, M. Negodaev, A. Nass, P. Bailey, U. Elschenbroich, H. Marukyan, A. Airapetian, A. Kisselev, L. Felawka, M. Amarian, A. Borissov, De Leo R, G. P. Capitani, M. Bouwhuis, L. G. Greeniaus, F. Stinzing, K. Hafidi, A. Laziev, H. Böttcher, B. Maiheu, C. Weiskopf, D. Reggiani, A. Jgoun, I.A. Savin, A. Hillenbrand, A. Fechtchenko, Y. X. Ye, P. Zupranski, P. Lenisa, A. Trzcinski, J. Dreschler, A. Elalaoui-Moulay, Frank Ellinghaus, B. Marianski, J. Volmer, A. Ivanilov, P. F. Dalpiaz, E. R. Kinney, N. Meyners, P. Tait, G. Rosner, V. V. Ammosov, F. Garibaldi, K. P. Schüler, De Sanctis E, K. Garrow, Y. Salomatin, H. P. Blok, E. Avetissian, B. Zihlmann, D. Balin, Nicola Bianchi, Y. Naryshkin, O. Mikloukho, Ralf Hertenberger, Wolfgang Lorenzon, J. G. Rubin, Hasko Stenzel, A. Reischl, B. Q. Ma, H. C. Chiang, M. Ehrenfried, G. Ciullo, Christian Schill, Bryzgalov, Houbing Lu, Eugenio Nappi, S. Potashov, L. Rubacek, D. H. Potterveld, Y. J. Mao, R. Seidl, M. Contalbrigo, Manuella Vincter, Martin Raithel, E. C. Aschenauer, De Nardo L, van der Steenhoven G, S. Belostotski, Kozlov, M. Hartig, I. Sanjiev, Naomi C R Makins, J. Stewart, S. Frullani, O. Grebeniouk, C. Riedl, P. Liebing, J. Lu, M. Beckmann, S. Yen, C. A. Miller, Ralf Kaiser, E. Steffens, G. Gavrilov, Vikhrov, Baturin, B. Krauss, L. A. Linden-Levy, N. Pickert, Dirk Ryckbosch, van der Nat Pb, S. Lu, M. Statera, Adel Terkulov, Andrey V. Izotov, D. Gaskell, L. Lapikás, Jeffrey Brack, Katerina Lipka, C. Vogel, G. Elbakian, J. J. M. Steijger, Michael Düren, Y. Miyachi, J. Wendland, D. Hasch, K. Sinram, Zhenyu Ye, C. Shearer, T. Chen, A. Nagaitsev, Michel Vetterli, N. Akopov, F. Masoli, Rezo Shanidze, Andreas Schäfer, W.H.A. Hesselink, A. Borysenko, (Astro)-Particles Physics, and Photo Conversion Materials
- Subjects
HERMES experiment ,Particle physics ,media_common.quotation_subject ,FOS: Physical sciences ,General Physics and Astronomy ,Spin structure ,Inelastic scattering ,Asymmetry ,High Energy Physics - Experiment ,14.65.−q ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,13.88.+e ,SDG 7 - Affordable and Clean Energy ,Nuclear Experiment ,media_common ,Physics ,13.60.−r ,14.20.Dh ,Scattering ,Momentum transfer ,HERA ,Deep inelastic scattering ,High Energy Physics::Experiment - Abstract
The \Hermes experiment has investigated the tensor spin structure of the deuteron using the 27.6 GeV/c positron beam of \Hera. The use of a tensor polarized deuteron gas target with only a negligible residual vector polarization enabled the first measurement of the tensor asymmetry $\At$ and the tensor structure function $\bd$ for average values of the Bj��rken variable $0.01<< x>
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- 2005
41. Deuteron and Antideuteron Production inAu+AuCollisions atsNN=200 GeV
- Author
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S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas, L. Aphecetche, S. H. Aronson, R. Averbeck, T. C. Awes, R. Azmoun, V. Babintsev, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, J. G. Boissevain, H. Borel, S. Borenstein, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, J.-S. Chai, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, P. Constantin, D. d’Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, A. Devismes, O. Dietzsch, O. Drapier, A. Drees, R. du Rietz, A. Durum, D. Dutta, Y. V. Efremenko, K. El Chenawi, A. Enokizono, H. En’yo, S. Esumi, L. Ewell, D. E. Fields, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, S.-Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, W. Guryn, H.-Å. Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, R. Hayano, N. Hayashi, X. He, M. Heffner, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Ichihara, V. V. Ikonnikov, K. Imai, D. Isenhower, M. Ishihara, M. Issah, A. Isupov, B. V. Jacak, W. Y. Jang, Y. Jeong, J. Jia, O. Jinnouchi, B. M. Johnson, S. C. Johnson, K. S. Joo, D. Jouan, S. Kametani, N. Kamihara, J. H. Kang, S. S. Kapoor, K. Katou, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. H. Kim, D. J. Kim, D. W. Kim, E. Kim, G.-B. Kim, H. J. Kim, E. Kistenev, A. Kiyomichi, K. Kiyoyama, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, M. Kopytine, D. Kotchetkov, A. Kozlov, P. J. Kroon, C. H. Kuberg, K. Kurita, Y. Kuroki, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, V. Ladygin, J. G. Lajoie, A. Lebedev, S. Leckey, D. M. Lee, S. Lee, M. J. Leitch, X. H. Li, H. Lim, A. Litvinenko, M. X. Liu, Y. Liu, C. F. Maguire, Y. I. Makdisi, A. Malakhov, V. I. Manko, Y. Mao, G. Martinez, M. D. Marx, H. Masui, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, F. Messer, Y. Miake, J. Milan, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, D. Mukhopadhyay, M. Muniruzzaman, J. Murata, S. Nagamiya, J. L. Nagle, T. Nakamura, B. K. Nandi, M. Nara, J. Newby, P. Nilsson, A. S. Nyanin, J. Nystrand, E. O’Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, K. Okada, M. Ono, V. Onuchin, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A. P. T. Palounek, V. Pantuev, V. Papavassiliou, J. Park, A. Parmar, S. F. Pate, T. Peitzmann, J.-C. Peng, V. Peresedov, C. Pinkenburg, R. P. Pisani, F. Plasil, M. L. Purschke, A. K. Purwar, J. Rak, I. Ravinovich, K. F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, P. Rosnet, S. S. Ryu, M. E. Sadler, N. Saito, T. Sakaguchi, M. Sakai, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H. D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, M. R. Shaw, T. K. Shea, T.-A. Shibata, K. Shigaki, T. Shiina, C. L. Silva, D. Silvermyr, K. S. Sim, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, J. P. Sullivan, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, P. Tarján, J. D. Tepe, T. L. Thomas, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, S. K. Tuli, H. Tydesjö, N. Tyurin, H. W. van Hecke, J. Velkovska, M. Velkovsky, V. Veszprémi, L. Villatte, A. A. Vinogradov, M. A. Volkov, E. Vznuzdaev, X. R. Wang, Y. Watanabe, S. N. White, F. K. Wohn, C. L. Woody, W. Xie, Y. Yang, A. Yanovich, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, C. Zhang, S. Zhou, S. J. Zhou, and L. Zolin
- Subjects
Physics ,Coalescence (physics) ,Particle physics ,010308 nuclear & particles physics ,Nuclear Theory ,General Physics and Astronomy ,01 natural sciences ,Spectral line ,Nuclear physics ,Deuterium ,Antiproton ,Phase space ,0103 physical sciences ,Transverse momentum ,Yield ratio ,High Energy Physics::Experiment ,Astrophysics::Earth and Planetary Astrophysics ,Nuclear Experiment ,010306 general physics ,Nucleon - Abstract
The production of deuterons and antideuterons in the transverse momentum range 1.1 < p(T)< 4.3 GeV/c at midrapidity in Au+Au collisions at root s(NN) = 200 GeV has been studied by the PHENIX experiment at RHIC. A coalescence analysis, comparing the deuteron and antideuteron spectra with that of proton and antiproton, has been performed. The coalescence probability is equal for both deuterons and antideuterons and it increases as a function of p(T), which is consistent with an expanding collision zone. Comparing (anti)proton yields, (p) over bar /p = 0.73 +/- 0.01, with (anti)deuteron yields, (d) over bar /d = 0.47 +/- 0.03, we estimate that (n) over bar /n = 0.64 +/- 0.04. The nucleon phase space density is estimated from the coalescence measurement.
- Published
- 2005
42. Centrality dependence of direct photon production in (square root)S(NN) = 200 GeV Au + Au collisions
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, J, Alexander, R, Amirikas, L, Aphecetche, S H, Aronson, R, Averbeck, T C, Awes, R, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, A, Bazilevsky, S, Belikov, Y, Berdnikov, S, Bhagavatula, J G, Boissevain, H, Borel, S, Borenstein, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, J-S, Chai, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, P, Constantin, D, d'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, O, Drapier, A, Drees, R, du Rietz, A, Durum, D, Dutta, Y V, Efremenko, K, El Chenawi, A, Enokizono, H, En'yo, S, Esumi, L, Ewell, D E, Fields, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, G, Gogiberidze, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M Grosse, Perdekamp, W, Guryn, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, R, Hayano, N, Hayashi, X, He, M, Heffner, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Ichihara, V V, Ikonnikov, K, Imai, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, W Y, Jang, Y, Jeong, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, S, Kametani, N, Kamihara, J H, Kang, S S, Kapoor, K, Katou, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, D W, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kistenev, A, Kiyomichi, K, Kiyoyama, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, M, Kopytine, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, K, Kurita, Y, Kuroki, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, V, Ladygin, J G, Lajoie, A, Lebedev, S, Leckey, D M, Lee, S, Lee, M J, Leitch, X H, Li, H, Lim, A, Litvinenko, M X, Liu, Y, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, M D, Marx, H, Masui, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, F, Messer, Y, Miake, J, Milan, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, J L, Nagle, T, Nakamura, B K, Nandi, M, Nara, J, Newby, P, Nilsson, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, M, Ono, V, Onuchin, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, A, Parmar, S F, Pate, T, Peitzmann, J-C, Peng, V, Peresedov, C, Pinkenburg, R P, Pisani, F, Plasil, M L, Purschke, A K, Purwar, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, P, Rosnet, S S, Ryu, M E, Sadler, N, Saito, T, Sakaguchi, M, Sakai, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, M R, Shaw, T K, Shea, T-A, Shibata, K, Shigaki, T, Shiina, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, P, Tarján, J D, Tepe, T L, Thomas, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, S K, Tuli, H, Tydesjö, N, Tyurin, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, L, Villatte, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, F K, Wohn, C L, Woody, W, Xie, Y, Yang, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, S J, Zhou, and L, Zolin
- Abstract
The first measurement of direct photons in Au + Au collisions at (square root)S(NN) = 200 GeV is presented. The direct photon signal is extracted as a function of the Au + Au collision centrality and compared to next-to-leading order perturbative quantum chromodynamics calculations. The direct photon yield is shown to scale with the number of nucleon-nucleon collisions for all centralities.
- Published
- 2005
43. Nuclear Modification Factors for Hadrons at Forward and Backward Rapidities in Deuteron-Gold Collisions atsNN=200 GeV
- Author
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S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, A. Al-Jamel, J. Alexander, K. Aoki, L. Aphecetche, R. Armendariz, S. H. Aronson, R. Averbeck, T. C. Awes, V. Babintsev, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, F. Bauer, A. Bazilevsky, S. Belikov, M. T. Bjorndal, J. G. Boissevain, H. Borel, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, M. P. Comets, P. Constantin, M. Csanád, T. Csörgő, J. P. Cussonneau, D. d'Enterria, K. Das, G. David, F. Deák, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, A. Devismes, O. Dietzsch, J. L. Drachenberg, O. Drapier, A. Drees, A. Durum, D. Dutta, V. Dzhordzhadze, Y. V. Efremenko, H. En'yo, B. Espagnon, S. Esumi, D. E. Fields, C. Finck, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, Y. Fukao, S.-Y. Fung, S. Gadrat, M. Germain, A. Glenn, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, H.-Å. Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, K. Hasuko, R. Hayano, X. He, M. Heffner, T. K. Hemmick, J. M. Heuser, P. Hidas, H. Hiejima, J. C. Hill, R. Hobbs, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Horaguchi, T. Ichihara, V. V. Ikonnikov, K. Imai, M. Inaba, M. Inuzuka, D. Isenhower, L. Isenhower, M. Ishihara, M. Issah, A. Isupov, B. V. Jacak, J. Jia, O. Jinnouchi, B. M. Johnson, S. C. Johnson, K. S. Joo, D. Jouan, F. Kajihara, S. Kametani, N. Kamihara, M. Kaneta, J. H. Kang, K. Katou, T. Kawabata, A. Kazantsev, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. J. Kim, E. Kim, G.-B. Kim, H. J. Kim, E. Kinney, A. Kiss, E. Kistenev, A. Kiyomichi, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, R. Kohara, B. Komkov, M. Konno, D. Kotchetkov, A. Kozlov, P. J. Kroon, C. H. Kuberg, G. J. Kunde, K. Kurita, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, J. G. Lajoie, Y. Le Bornec, A. Lebedev, S. Leckey, D. M. Lee, M. J. Leitch, M. A. L. Leite, X. H. Li, H. Lim, A. Litvinenko, M. X. Liu, C. F. Maguire, Y. I. Makdisi, A. Malakhov, V. I. Manko, Y. Mao, G. Martinez, H. Masui, F. Matathias, T. Matsumoto, M. C. McCain, P. L. McGaughey, Y. Miake, T. E. Miller, A. Milov, S. Mioduszewski, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, D. Mukhopadhyay, M. Muniruzzaman, S. Nagamiya, J. L. Nagle, T. Nakamura, J. Newby, A. S. Nyanin, J. Nystrand, E. O'Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, H. Okada, K. Okada, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A. P. T. Palounek, V. Pantuev, V. Papavassiliou, J. Park, W. J. Park, S. F. Pate, H. Pei, V. Penev, J.-C. Peng, H. Pereira, V. Peresedov, A. Pierson, C. Pinkenburg, R. P. Pisani, M. L. Purschke, A. K. Purwar, J. M. Qualls, J. Rak, I. Ravinovich, K. F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, S. S. E. Rosendahl, P. Rosnet, V. L. Rykov, S. S. Ryu, N. Saito, T. Sakaguchi, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H. D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, T. K. Shea, I. Shein, T.-A. Shibata, K. Shigaki, M. Shimomura, A. Sickles, C. L. Silva, D. Silvermyr, K. S. Sim, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, J. P. Sullivan, S. Takagi, E. M. Takagui, A. Taketani, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, A. Taranenko, P. Tarján, T. L. Thomas, M. Togawa, J. Tojo, H. Torii, R. S. Towell, V-N. Tram, I. Tserruya, Y. Tsuchimoto, H. Tydesjö, N. Tyurin, T. J. Uam, H. W. van Hecke, J. Velkovska, M. Velkovsky, V. Veszprémi, A. A. Vinogradov, M. A. Volkov, E. Vznuzdaev, X. R. Wang, Y. Watanabe, S. N. White, N. Willis, F. K. Wohn, C. L. Woody, W. Xie, A. Yanovich, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, C. Zhang, S. Zhou, J. Zimányi, L. Zolin, and X. Zong
- Subjects
Physics ,Particle physics ,Range (particle radiation) ,010308 nuclear & particles physics ,Nuclear Theory ,Hadron ,General Physics and Astronomy ,Parton ,01 natural sciences ,Nuclear physics ,Momentum ,medicine.anatomical_structure ,Deuterium ,0103 physical sciences ,medicine ,High Energy Physics::Experiment ,Rapidity ,Nuclear Experiment ,010306 general physics ,Nucleus ,Scaling - Abstract
We report on charged hadron production in deuteron-gold reactions at roots(NN) = 200 GeV. Our measurements in the deuteron direction cover 1.4
- Published
- 2005
44. Centrality Dependence of Charm Production from a Measurement of Single Electrons inAu+AuCollisions atsNN=200 GeV
- Author
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S. S. Adler, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, J. Alexander, R. Amirikas, L. Aphecetche, S. H. Aronson, R. Averbeck, T. C. Awes, R. Azmoun, V. Babintsev, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, A. Bazilevsky, S. Belikov, Y. Berdnikov, S. Bhagavatula, J. G. Boissevain, H. Borel, S. Borenstein, M. L. Brooks, D. S. Brown, N. Bruner, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, X. Camard, J.-S. Chai, P. Chand, W. C. Chang, S. Chernichenko, C. Y. Chi, J. Chiba, M. Chiu, I. J. Choi, J. Choi, R. K. Choudhury, T. Chujo, V. Cianciolo, Y. Cobigo, B. A. Cole, P. Constantin, D. G. d'Enterria, G. David, H. Delagrange, A. Denisov, A. Deshpande, E. J. Desmond, A. Devismes, O. Dietzsch, O. Drapier, A. Drees, R. du Rietz, A. Durum, D. Dutta, Y. V. Efremenko, K. El Chenawi, A. Enokizono, H. En'yo, S. Esumi, L. Ewell, D. E. Fields, F. Fleuret, S. L. Fokin, B. D. Fox, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, S.-Y. Fung, S. Garpman, T. K. Ghosh, A. Glenn, G. Gogiberidze, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, W. Guryn, H.-Å. Gustafsson, T. Hachiya, J. S. Haggerty, H. Hamagaki, A. G. Hansen, E. P. Hartouni, M. Harvey, R. Hayano, N. Hayashi, X. He, M. Heffner, T. K. Hemmick, J. M. Heuser, M. Hibino, J. C. Hill, W. Holzmann, K. Homma, B. Hong, A. Hoover, T. Ichihara, V. V. Ikonnikov, K. Imai, D. Isenhower, M. Ishihara, M. Issah, A. Isupov, B. V. Jacak, W. Y. Jang, Y. Jeong, J. Jia, O. Jinnouchi, B. M. Johnson, S. C. Johnson, K. S. Joo, D. Jouan, S. Kametani, N. Kamihara, J. H. Kang, S. S. Kapoor, K. Katou, S. Kelly, B. Khachaturov, A. Khanzadeev, J. Kikuchi, D. H. Kim, D. J. Kim, D. W. Kim, E. Kim, G.-B. Kim, H. J. Kim, E. Kistenev, A. Kiyomichi, K. Kiyoyama, C. Klein-Boesing, H. Kobayashi, L. Kochenda, V. Kochetkov, D. Koehler, T. Kohama, M. Kopytine, D. Kotchetkov, A. Kozlov, P. J. Kroon, C. H. Kuberg, K. Kurita, Y. Kuroki, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, V. Ladygin, J. G. Lajoie, A. Lebedev, S. Leckey, D. M. Lee, S. Lee, M. J. Leitch, X. H. Li, H. Lim, A. Litvinenko, M. X. Liu, Y. Liu, C. F. Maguire, Y. I. Makdisi, A. Malakhov, V. I. Manko, Y. Mao, G. Martinez, M. D. Marx, H. Masui, F. Matathias, T. Matsumoto, P. L. McGaughey, E. Melnikov, F. Messer, Y. Miake, J. Milan, T. E. Miller, A. Milov, S. Mioduszewski, R. E. Mischke, G. C. Mishra, J. T. Mitchell, A. K. Mohanty, D. P. Morrison, J. M. Moss, F. Mühlbacher, D. Mukhopadhyay, M. Muniruzzaman, J. Murata, S. Nagamiya, J. L. Nagle, T. Nakamura, B. K. Nandi, M. Nara, J. Newby, P. Nilsson, A. S. Nyanin, J. Nystrand, E. O'Brien, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, K. Okada, M. Ono, V. Onuchin, A. Oskarsson, I. Otterlund, K. Oyama, K. Ozawa, D. Pal, A. P. T. Palounek, V. S. Pantuev, V. Papavassiliou, J. Park, A. Parmar, S. F. Pate, T. Peitzmann, J.-C. Peng, V. Peresedov, C. Pinkenburg, R. P. Pisani, F. Plasil, M. L. Purschke, A. K. Purwar, J. Rak, I. Ravinovich, K. F. Read, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, P. Rosnet, S. S. Ryu, M. E. Sadler, N. Saito, T. Sakaguchi, M. Sakai, S. Sakai, V. Samsonov, L. Sanfratello, R. Santo, H. D. Sato, S. Sato, S. Sawada, Y. Schutz, V. Semenov, R. Seto, M. R. Shaw, T. K. Shea, T.-A. Shibata, K. Shigaki, T. Shiina, C. L. Silva, D. Silvermyr, K. S. Sim, C. P. Singh, V. Singh, M. Sivertz, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, J. P. Sullivan, E. M. Takagui, A. Taketani, M. Tamai, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, P. Tarján, J. D. Tepe, T. L. Thomas, J. Tojo, H. Torii, R. S. Towell, I. Tserruya, H. Tsuruoka, S. K. Tuli, H. Tydesjö, N. Tyurin, H. W. van Hecke, J. Velkovska, M. Velkovsky, V. Veszprémi, L. Villatte, A. A. Vinogradov, M. A. Volkov, E. Vznuzdaev, X. R. Wang, Y. Watanabe, S. N. White, F. K. Wohn, C. L. Woody, W. Xie, Y. Yang, A. Yanovich, S. Yokkaichi, G. R. Young, I. E. Yushmanov, W. A. Zajc, C. Zhang, S. Zhou, S. J. Zhou, and L. Zolin
- Subjects
Quark ,Physics ,Particle physics ,Photon ,Meson ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Hadron ,General Physics and Astronomy ,Electron ,7. Clean energy ,01 natural sciences ,Spectral line ,Nuclear physics ,0103 physical sciences ,High Energy Physics::Experiment ,Charm (quantum number) ,Nuclear Experiment ,010306 general physics ,Bar (unit) - Abstract
The PHENIX experiment has measured midrapidity transverse momentum spectra (0.4
- Published
- 2005
45. Nuclear modification factors for hadrons at forward and backward rapidities in deuteron-gold collisions at sqrt[s(NN)]=200 GeV
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, A, Al-Jamel, J, Alexander, K, Aoki, L, Aphecetche, R, Armendariz, S H, Aronson, R, Averbeck, T C, Awes, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, F, Bauer, A, Bazilevsky, S, Belikov, M T, Bjorndal, J G, Boissevain, H, Borel, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, M P, Comets, P, Constantin, M, Csanád, T, Csörgo, J P, Cussonneau, D, d'Enterria, K, Das, G, David, F, Deák, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, J L, Drachenberg, O, Drapier, A, Drees, A, Durum, D, Dutta, V, Dzhordzhadze, Y V, Efremenko, H, En'yo, B, Espagnon, S, Esumi, D E, Fields, C, Finck, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, Y, Fukao, S-Y, Fung, S, Gadrat, M, Germain, A, Glenn, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, K, Hasuko, R, Hayano, X, He, M, Heffner, T K, Hemmick, J M, Heuser, P, Hidas, H, Hiejima, J C, Hill, R, Hobbs, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Horaguchi, T, Ichihara, V V, Ikonnikov, K, Imai, M, Inaba, M, Inuzuka, D, Isenhower, L, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, F, Kajihara, S, Kametani, N, Kamihara, M, Kaneta, J H, Kang, K, Katou, T, Kawabata, A, Kazantsev, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kinney, A, Kiss, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, R, Kohara, B, Komkov, M, Konno, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, G J, Kunde, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, Y, Le Bornec, A, Lebedev, S, Leckey, D M, Lee, M J, Leitch, M A L, Leite, X H, Li, H, Lim, A, Litvinenko, M X, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, H, Masui, F, Matathias, T, Matsumoto, M C, McCain, P L, McGaughey, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, D, Mukhopadhyay, M, Muniruzzaman, S, Nagamiya, J L, Nagle, T, Nakamura, J, Newby, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, H, Okada, K, Okada, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, W J, Park, S F, Pate, H, Pei, V, Penev, J-C, Peng, H, Pereira, V, Peresedov, A, Pierson, C, Pinkenburg, R P, Pisani, M L, Purschke, A K, Purwar, J M, Qualls, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, S S E, Rosendahl, P, Rosnet, V L, Rykov, S S, Ryu, N, Saito, T, Sakaguchi, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, A, Sickles, C L, Silva, D, Silvermyr, K S, Sim, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, S, Takagi, E M, Takagui, A, Taketani, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, A, Taranenko, P, Tarján, T L, Thomas, M, Togawa, J, Tojo, H, Torii, R S, Towell, V-N, Tram, I, Tserruya, Y, Tsuchimoto, H, Tydesjö, N, Tyurin, T J, Uam, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, N, Willis, F K, Wohn, C L, Woody, W, Xie, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, J, Zimányi, L, Zolin, and X, Zong
- Abstract
We report on charged hadron production in deuteron-gold reactions at sqrt[s(NN)]=200 GeV. Our measurements in the deuteron direction cover 1.4eta2.2, referred to as forward rapidity, and in the gold direction -2.0eta-1.4, referred to as backward rapidity, and a transverse momentum range p(T)=0.5-4.0 GeV/c. We compare the relative yields for different deuteron-gold collision centrality classes. We observe a suppression relative to binary collision scaling at forward rapidity, sensitive to low momentum fraction (x) partons in the gold nucleus, and an enhancement at backward rapidity, sensitive to high momentum fraction partons in the gold nucleus.
- Published
- 2004
46. Saturation of azimuthal anisotropy in Au + Au collisions at (square root)s(NN) = 62-200 GeV
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, A, Al-Jamel, J, Alexander, R, Amirikas, K, Aoki, L, Aphecetche, R, Armendariz, S H, Aronson, R, Averbeck, T C, Awes, B, Azmoun, R, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, F, Bauer, A, Bazilevsky, S, Belikov, R, Bennett, Y, Berdnikov, S, Bhagavatula, M T, Bjorndal, J G, Boissevain, H, Borel, S, Borenstein, K, Boyle, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, S, Campbell, J-S, Chai, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, C R, Cleven, Y, Cobigo, B A, Cole, M P, Comets, P, Constantin, M, Csanád, T, Csörgo, D, d'Enterria, T, Dahms, K, Das, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, A, Dion, J L, Drachenberg, O, Drapier, A, Drees, K A, Drees, A K, Dubey, R, du Rietz, A, Durum, D, Dutta, V, Dzhordzhadze, Y V, Efremenko, J, Egdemir, K, El Chenawi, A, Enokizono, H, En'yo, B, Espagnon, S, Esumi, L, Ewell, D E, Fields, F, Fleuret, S L, Fokin, B, Forestier, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, Y, Fukao, S-Y, Fung, S, Gadrat, S, Garpman, F, Gastineau, M, Germain, T K, Ghosh, A, Glenn, G, Gogiberidze, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M Grosse, Perdekamp, T, Gunji, W, Guryn, H-A, Gustafsson, T, Hachiya, A Hadj, Henni, J S, Haggerty, M N, Hagiwara, H, Hamagaki, A G, Hansen, H, Harada, E P, Hartouni, K, Haruna, M, Harvey, E, Haslum, K, Hasuko, R, Hayano, N, Hayashi, X, He, M, Heffner, T K, Hemmick, J M, Heuser, M, Hibino, H, Hiejima, J C, Hill, R, Hobbs, M, Holmes, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Horaguchi, H M, Hur, T, Ichihara, V V, Ikonnikov, K, Imai, M, Inaba, D, Isenhower, L, Isenhower, M, Ishihara, T, Isobe, M, Issah, A, Isupov, B V, Jacak, W Y, Jang, Y, Jeong, J, Jia, J, Jin, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, F, Kajihara, S, Kametani, N, Kamihara, M, Kaneta, J H, Kang, S S, Kapoor, K, Katou, T, Kawagishi, A V, Kazantsev, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, D W, Kim, E, Kim, G-B, Kim, H J, Kim, Y-S, Kim, E, Kinney, W W, Kinnison, A, Kiss, E, Kistenev, A, Kiyomichi, K, Kiyoyama, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, B, Komkov, M, Konno, M, Kopytine, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, G J, Kunde, N, Kurihara, K, Kurita, Y, Kuroki, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, V, Ladygin, J G, Lajoie, Y, Le Bornec, A, Lebedev, S, Leckey, D M, Lee, M K, Lee, S, Lee, M J, Leitch, M A L, Leite, X H, Li, H, Lim, A, Litvinenko, M X, Liu, Y, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, Y, Mao, G, Martinez, M D, Marx, H, Masui, F, Matathias, T, Matsumoto, M C, McCain, P L, McGaughey, E, Melnikov, F, Messer, Y, Miake, J, Milan, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, T V, Moukhanova, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagata, J L, Nagle, M, Naglis, T, Nakamura, B K, Nandi, M, Nara, J, Newby, M, Nguyen, P, Nilsson, B, Norman, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, H, Okada, K, Okada, O O, Omiwade, M, Ono, V, Onuchin, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, W J, Park, A, Parmar, S F, Pate, H, Pei, T, Peitzmann, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, C, Pinkenburg, R P, Pisani, F, Plasil, M L, Purschke, A K, Purwar, H, Qu, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, S S E, Rosendahl, P, Rosnet, P, Rukoyatkin, V L, Rykov, S S, Ryu, M E, Sadler, B, Sahlmueller, N, Saito, T, Sakaguchi, M, Sakai, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, D, Sharma, M R, Shaw, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, T, Shiina, M, Shimomura, T, Shohjoh, K, Shoji, A, Sickles, C L, Silva, D, Silvermyr, K S, Sim, J, Simon-Gillo, C P, Singh, V, Singh, M, Sivertz, S, Skutnik, W C, Smith, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, C, Suire, J P, Sullivan, J, Sziklai, T, Tabaru, S, Takagi, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, A, Taranenko, P, Tarján, J D, Tepe, T L, Thomas, M, Togawa, J, Tojo, H, Torii, R S, Towell, V-N, Tram, I, Tserruya, Y, Tsuchimoto, H, Tsuruoka, S K, Tuli, H, Tydesjö, N, Tyurin, H, Valle, H W, van Hecke, J, Velkovska, M, Velkovsky, R, Vertesi, V, Veszprémi, L, Villatte, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, M, Wagner, X R, Wang, Y, Watanabe, J, Wessels, S N, White, N, Willis, D, Winter, F K, Wohn, C L, Woody, M, Wysocki, W, Xie, Y, Yang, A, Yanovich, S, Yokkaichi, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, O, Zaudkte, C, Zhang, S, Zhou, S J, Zhou, J, Zimányi, and L, Zolin
- Abstract
New measurements are presented for charged hadron azimuthal correlations at midrapidity in Au+Au collisions at (square root)s(NN) = 62.4 and 200 GeV. They are compared to earlier measurements obtained at (square root)s(NN) = 130 GeV and in Pb + Pb collisions at (square root)s(NN) = 17.2 GeV. Sizeable anisotropies are observed with centrality and transverse momentum (pT) dependence characteristic of elliptic flow (upsilon2). For a broad range of centralities, the observed magnitudes and trends of the differential anisotropy, upsilon2(pT), change very little over the collision energy range (square root)s(NN) = 62-200 GeV, indicating saturation of the excitation function for upsilon2 at these energies. Such a saturation may be indicative of the dominance of a very soft equation of state for (square root)s(NN) approximately 60-200 GeV.
- Published
- 2004
47. Double Helicity Asymmetry in Inclusive Midrapidityπ0Production for Polarizedp+pCollisions ats=200 GeV
- Author
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S. Y. Fung, Alexander Milov, G. C. Mishra, H. Pereira, R. A. Soltz, H. Borel, Marie Germain, John Hill, K. Oyama, O. Drapier, E. R. Kinney, A. Devismes, Toru Sugitate, V. S. Pantuev, D. P. Morrison, M. Grosse Perdekamp, L. D. Isenhower, S. F. Pate, V. E. Semenov, J. Zimányi, F. Kajihara, P. J. Kroon, Takao Sakaguchi, D. Isenhower, H. Delagrange, O. Dietzsch, S. Butsyk, Vladimir Samsonov, A. Pierson, X. R. Wang, Y. Mao, C. Klein-Boesing, M. Harvey, V-N. Tram, A. Kozlov, B. Komkov, R. Seto, Ferenc Deák, V. Papavassiliou, Sébastien Gadrat, Norio Saito, N. Kamihara, S. Afanasiev, A. Ster, S. Kametani, Pàl Hidas, Dipanwita Dutta, I. Otterlund, A. Bazilevsky, V. Dzhordzhadze, S. Zhou, François Fleuret, Robert F. Hobbs, J. H. Kang, M. A. L. Leite, F. Matathias, R. Armendariz, A. D. Frawley, Junji Tojo, A. Baldisseri, Kensuke Homma, David Olle Rickard Silvermyr, S. Sawada, A. Franz, A. V. Kazantsev, J. S. Haggerty, A. Romana, Hiroaki Ohnishi, B. M. Johnson, B. D. Fox, A. G. Hansen, Tamas Ferenc Csorgo, I. Tserruya, A. Drees, Yu. Efremenko, K. Okada, O. Zaudtke, Shingo Sakai, H. En'yo, P. Constantin, M. J. Leitch, Motoi Inaba, H. Pei, S. Chernichenko, S. Takagi, H. Lim, S. H. Aronson, Alexei Khanzadeev, J. M. Qualls, S. N. White, N. Bruner, E. Stenlund, K. N. Barish, S. Belikov, K. S. Joo, J. L. Nagle, A. Litvinenko, M. A. Volkov, M. Rosati, G. B. Kim, M. Heffner, M. Inuzuka, B. Bassalleck, Hideki Hamagaki, G. David, N. N. Ajitanand, A. Isupov, Mate Csanad, M. Konno, W. Holzmann, C. L. Silva, Y. Fukao, V. Babintsev, M. Velkovsky, C. A. Ogilvie, J. Gosset, T. J. Uam, Bruno Espagnon, A. Taranenko, T. K. Hemmick, Brian Cole, T. L. Thomas, Yasuo Miake, T. C. Awes, Jun Kikuchi, A. A. Vinogradov, A. Kiss, J. P. Sullivan, Hirohiko Sato, Henrik Tydesjö, Takahiro Nakamura, Masayasu Ishihara, K. Das, Xingguo Li, J. L. Drachenberg, X. Zong, Jiangyong Jia, Y. Goto, J. Velkovska, Maya Hachiya Shimomura, Y. I. Makdisi, V. Bumazhnov, M. P. Comets, E. P. Hartouni, Saskia Mioduszewski, D. Mukhopadhyay, Jen-Chieh Peng, David D'Enterria, Y. Cobigo, M. L. Brooks, X. He, Ryugo S. Hayano, B. Khachaturov, Y. Riabov, Susumu Sato, N. Grau, V. Peresedov, Henner Buesching, I. Ravinovich, S. P. Sorensen, P. L. McGaughey, W. E. Sondheim, M. T. Bjorndal, R. P. Pisani, L. Zolin, R. Kohara, V. L. Rykov, T. Matsumoto, Kenta Shigaki, P. W. Stankus, S. P. Stoll, Nikolay Tyurin, S. Yokkaichi, A. Durum, Yves Roland Schutz, J. M. Burward-Hoy, M. Muniruzzaman, F. Staley, K. Tanida, J. M. Heuser, T. Ichihara, J. G. Lajoie, Xiao-yan Li, K. Hasuko, P. Chand, V. I. Kochetkov, T. Hachiya, D. S. Brown, P. Tarján, S. S. Ryu, Dong Jo Kim, S. S.E. Rosendahl, G. Bunce, Osamu Jinnouchi, H. Masui, J. T. Mitchell, Y. J. Kwon, M. J. Tannenbaum, W. C. Chang, F. K. Wohn, Matthew G. Reuter, I. J. Choi, Steven Kelly, Minghui Liu, D. Jouan, L. Sanfratello, S. S. Adler, A. S. Nyanin, G. S. Kyle, Hiroyuki Okada, M. Gonin, Roy A. Lacey, V.N. Penev, Vladislav Manko, N. Willis, James Alexander, V. V. Ikonnikov, Kenneth Francis Read, D. Bucher, J. G. Boissevain, I. D. Ojha, D. Pal, R. Averbeck, Byung-Sik Hong, Joakim Nystrand, D. E. Fields, Gerd Joachim Kunde, B. V. Jacak, Alexander Malakhov, Masashi Kaneta, K. Kurita, Philippe Rosnet, S. C. Johnson, K. Katou, T. Chujo, X. Camard, Alexandre Lebedev, E. M. Takagui, I. Shein, D. M. Lee, M. J. Kweon, Ahmed Al-Jamel, R. S. Towell, A. K. Purwar, A. Kiyomichi, C. L. Woody, W. J. Park, Christine Angela Aidala, C. Pinkenburg, Ch. Finck, P. D. Barnes, Jason Newby, A. Yanovich, J. E. Frantz, Y. Le Bornec, M. Stepanov, G. Roche, E. J. Desmond, Jean-Pierre Cussonneau, M. Togawa, J. Park, Florian Bauer, Y. Tsuchimoto, I. E. Yushmanov, H. W. Van Hecke, H. Kobayashi, A. Glenn, S. Bathe, Y. Watanabe, Agneta Oskarsson, I. V. Sourikova, H. Torii, Y. Akiba, C. Y. Chi, S. Nagamiya, Kazuhiro Tanaka, Klaus Johannes Reygers, E. Kim, A. Soldatov, Atsushi Taketani, Martin Purschke, D. Kotchetkov, Z. Fraenkel, R. K. Choudhury, Takahiro Kawabata, Y. Tanaka, T. K. Shea, S. Esumi, W. A. Zajc, K. Aoki, A. Denisov, V. Cianciolo, H. J. Kim, Sergey Fokin, T. Horaguchi, A. Hoover, S. Batsouli, Charles Maguire, S. Leckey, M. Issah, Josh Moss, E. Kistenev, A. P.T. Palounek, H. A. Gustafsson, E. Vznuzdaev, V. Baublis, C. Zhang, Viktor Riabov, K. S. Sim, L. Aphecetche, M. C. McCain, H. Hiejima, K. Imai, Jan Rak, R. Granier de Cassagnac, Wei Xie, K. Ozawa, A. Deshpande, Anne Marie Sickles, G. R. Young, Viktor Veszpremi, Senta Greene, E. O'Brien, T. E. Miller, R. Santo, M. Chiu, Ajit Kumar Mohanty, T. A. Shibata, German Martinez, C. H. Kuberg, and J. Chiba
- Subjects
Quantum chromodynamics ,Physics ,Particle physics ,Proton ,010308 nuclear & particles physics ,media_common.quotation_subject ,Nuclear Theory ,General Physics and Astronomy ,01 natural sciences ,7. Clean energy ,Helicity ,Asymmetry ,Gluon ,law.invention ,Nuclear physics ,law ,0103 physical sciences ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider ,Collider ,Spin-½ ,media_common - Abstract
We present a measurement of the double longitudinal spin asymmetry in inclusive pi(0) production in polarized proton-proton collisions at roots=200 GeV. The data were taken at the Relativistic Heavy Ion Collider with average beam polarizations of 0.27. The measurements are the first in a program to study the longitudinal spin structure of the proton, using strongly interacting probes, at collider energies. The asymmetry is presented for transverse momenta 1-5 GeV/c at midrapidity, where next-to-leading-order perturbative quantum chromodynamic (NLO pQCD) calculations well describe the unpolarized cross section. The observed asymmetry is small and is compared to a NLO pQCD calculation with a range of polarized gluon distributions.
- Published
- 2004
48. Bose-Einstein Correlations of Charged Pion Pairs inAu+AuCollisions atsNN=200 GeV
- Author
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M. Velkovsky, G. S. Kyle, James Alexander, A. A. Vinogradov, J. S. Chai, Henrik Tydesjö, Y. Jeong, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, S. Batsouli, P. L. McGaughey, Jiangyong Jia, Y. Goto, T. Peitzmann, J. M. Burward-Hoy, Sean A. Kelly, Philippe Rosnet, S. Kametani, Saskia Mioduszewski, Alexandre Lebedev, J. H. Kang, J. S. Haggerty, A. Romana, A. P.T. Palounek, D. M. Lee, Senta Greene, M. Nara, C. P. Singh, Yves Roland Schutz, E. O'Brien, V. S. Pantuev, J. M. Heuser, D. Pal, S. Bathe, Jan Rak, M. Harvey, S. F. Pate, W. Guryn, E. M. Takagui, B. A. Cole, Y. I. Makdisi, Kensuke Homma, E. Melnikov, R. Granier de Cassagnac, Junji Tojo, S. Chernichenko, R. A. Soltz, Y. Watanabe, M. Grosse Perdekamp, H. Lim, David Olle Rickard Silvermyr, K. Ozawa, R. S. Towell, X. R. Wang, K. Okada, B. Bassalleck, F. Mühlbacher, L. Ewell, Y. Tanaka, T. K. Shea, Minghui Liu, M. J. Tannenbaum, David D'Enterria, T. L. Thomas, H. En'yo, P. Constantin, L. Aphecetche, Shih-Chang Lee, Jen-Chieh Peng, A. Soldatov, V. V. Ikonnikov, V.A. Onuchin, R. P. Pisani, S. Belikov, K. S. Joo, Kenneth Francis Read, M. J. Leitch, Nikolay Tyurin, Do-Won Kim, K. S. Sim, B. D. Fox, P. J. Kroon, V. Papavassiliou, Dong-Hun Kim, T. Ichihara, C. L. Silva, F. K. Wohn, D. Bucher, J. G. Boissevain, Ryugo S. Hayano, J. Chiba, T. Kohama, D. E. Fields, T. K. Ghosh, Matthew G. Reuter, B. V. Jacak, Dong Jo Kim, H. W. Van Hecke, S. Esumi, L. Kochenda, H. Tsuruoka, Y. Riabov, S. P. Stoll, I. Ravinovich, K. Katou, M. Sakai, Masayasu Ishihara, Osamu Jinnouchi, Susumu Sato, Kenta Shigaki, A. Kiyomichi, G. C. Mishra, C. Pinkenburg, M. Muniruzzaman, F. Staley, T. E. Miller, A. K. Purwar, Y. J. Kwon, A. S. Nyanin, W. A. Zajc, O. Dietzsch, K. Imai, G. Bunce, Takao Sakaguchi, M. Issah, E. Vznuzdaev, V. Baublis, C. Klein-Boesing, Alexander Milov, N. Grau, M. Stepanov, G. Roche, B. Khachaturov, I. D. Ojha, Alexander Malakhov, H. J. Kim, A. Denisov, K. Tanida, F. Plasil, L. Sanfratello, S. Borenstein, V. I. Kochetkov, V. Cianciolo, O. Drapier, Dipanwita Dutta, A. D. Frawley, J. T. Mitchell, T. Shiina, S. Sawada, J. D. Tepe, A. Franz, T. Matsumoto, P. Chand, S. H. Aronson, C. Y. Chi, J. Gosset, D. P. Morrison, J. P. Sullivan, L. Zolin, R. Santo, A. Enokizono, Vladislav Manko, D. Jouan, N. N. Ajitanand, L. Villatte, J. B. Choi, Julia Velkovska, K. El Chenawi, M. R. Shaw, Jason Newby, P. W. Stankus, M. D. Marx, V. E. Semenov, Wei Xie, S. S. Kapoor, W. Holzmann, A. Deshpande, Sergey Fokin, G. R. Young, S. C. Johnson, I. Tserruya, Yu. Efremenko, Charles Maguire, S. Leckey, S. S. Ryu, T. Chujo, A. Hoover, Y. J. Mao, V. Singh, X. Camard, R. du Rietz, Josh Moss, Takahiro Nakamura, N. Kamihara, J. Murata, M. J. Kweon, E. P. Hartouni, H. Kobayashi, G. B. Kim, D. Koehler, Agneta Oskarsson, F. Matathias, A. Parmar, M. Tamai, E. Kistenev, S. Yokkaichi, P. D. Barnes, A. Yanovich, Alberto Baldisseri, M. E. Sadler, S. Garpman, A. G. Hansen, Shingo Sakai, Y. Berdnikov, Christine Angela Aidala, Y. Akiba, S. Zhou, A. Durum, Hirohiko Sato, S. K. Tuli, Joakim Nystrand, E. J. Desmond, Kazuhiro Tanaka, A. Drees, T. C. Awes, Jun Kikuchi, C. L. Woody, Klaus Johannes Reygers, H. A. Gustafsson, M. Hibino, S. N. White, E. Kim, J. Park, M. Chiu, Ajit Kumar Mohanty, T. A. Shibata, Y. Yang, R. E. Mischke, C. Zhang, S. Afanasiev, Atsushi Taketani, A. Ster, D. S. Brown, A. Litvinenko, Norio Saito, M. A. Volkov, I. V. Sourikova, H. Torii, A. Isupov, Martin Purschke, R. Amirikas, R. Azmoun, W. E. Sondheim, B. M. Johnson, C. A. Ogilvie, I. E. Yushmanov, S. Y. Fung, Viktor Riabov, K. Kiyoyama, D. Kotchetkov, B. K. Nandi, T. K. Hemmick, Alexei Khanzadeev, S. Bhagavatula, F. Messer, Yasuo Miake, D. Mukhopadhyay, N. Bruner, E. Stenlund, Y. Cobigo, Z. Fraenkel, M. Heffner, J. E. Frantz, Y. Kuroki, W. Y. Jang, John Hill, K. Oyama, R. K. Choudhury, S. Nagamiya, Hideki Hamagaki, G. David, Herve Borel, C. H. Kuberg, Toru Sugitate, A. Glenn, G. Gogiberidze, German Martinez, François Fleuret, V. Babintsev, H. Delagrange, Yanwen Liu, M. Kopytine, V. Ladygin, M. Gonin, K. Kurita, M. Sivertz, Hiroaki Ohnishi, J. Milan, V. Bumazhnov, D. Isenhower, P. Tarján, H. Buesching, A. Kozlov, W. C. Chang, R. Seto, Xingguo Li, Roy A. Lacey, S. P. Sorensen, Peter M. Nilsson, S. Butsyk, J. G. Lajoie, T. Hachiya, Vladimir Samsonov, I. Otterlund, I. J. Choi, K. N. Barish, J. L. Nagle, M. Ono, M. L. Brooks, X. He, V. Peresedov, H. Masui, M. Rosati, and S. S. Adler
- Subjects
Physics ,Particle physics ,010308 nuclear & particles physics ,General Physics and Astronomy ,Radius ,Function (mathematics) ,Bose–Einstein correlations ,16. Peace & justice ,01 natural sciences ,Nuclear physics ,symbols.namesake ,Pion ,Bose–Einstein statistics ,0103 physical sciences ,Coulomb ,symbols ,Nuclear Experiment ,010306 general physics ,Constant (mathematics) ,Parametrization - Abstract
Bose-Einstein correlations of identically charged pion pairs were measured by the PHENIX experiment at midrapidity in Au+Au collisions at roots(NN)=200 GeV. The Bertsch-Pratt radius parameters were determined as a function of the transverse momentum of the pair and as a function of the centrality of the collision. Using the standard core-halo partial Coulomb fits, and a new parametrization which constrains the Coulomb fraction as determined from the unlike-sign pion correlation, the ratio R-out/R-side is within 0.8-1.1 for 0.25 similar to0.45 GeV/c is approximately constant at unity as a function of centrality.
- Published
- 2004
49. Centrality dependence of charm production from a measurement of single electrons in Au+Au collisions at sqrt[s(NN)]=200 GeV
- Author
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S S, Adler, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, J, Alexander, R, Amirikas, L, Aphecetche, S H, Aronson, R, Averbeck, T C, Awes, R, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, A, Bazilevsky, S, Belikov, Y, Berdnikov, S, Bhagavatula, J G, Boissevain, H, Borel, S, Borenstein, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, X, Camard, J-S, Chai, P, Chand, W C, Chang, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, J, Choi, R K, Choudhury, T, Chujo, V, Cianciolo, Y, Cobigo, B A, Cole, P, Constantin, D G, d'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, A, Devismes, O, Dietzsch, O, Drapier, A, Drees, R, du Rietz, A, Durum, D, Dutta, Y V, Efremenko, K, El Chenawi, A, Enokizono, H, En'yo, S, Esumi, L, Ewell, D E, Fields, F, Fleuret, S L, Fokin, B D, Fox, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, G, Gogiberidze, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, W, Guryn, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, E P, Hartouni, M, Harvey, R, Hayano, N, Hayashi, X, He, M, Heffner, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, W, Holzmann, K, Homma, B, Hong, A, Hoover, T, Ichihara, V V, Ikonnikov, K, Imai, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, B V, Jacak, W Y, Jang, Y, Jeong, J, Jia, O, Jinnouchi, B M, Johnson, S C, Johnson, K S, Joo, D, Jouan, S, Kametani, N, Kamihara, J H, Kang, S S, Kapoor, K, Katou, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D H, Kim, D J, Kim, D W, Kim, E, Kim, G-B, Kim, H J, Kim, E, Kistenev, A, Kiyomichi, K, Kiyoyama, C, Klein-Boesing, H, Kobayashi, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, M, Kopytine, D, Kotchetkov, A, Kozlov, P J, Kroon, C H, Kuberg, K, Kurita, Y, Kuroki, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, V, Ladygin, J G, Lajoie, A, Lebedev, S, Leckey, D M, Lee, S, Lee, M J, Leitch, X H, Li, H, Lim, A, Litvinenko, M X, Liu, Y, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, V I, Manko, Y, Mao, G, Martinez, M D, Marx, H, Masui, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, F, Messer, Y, Miake, J, Milan, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, J L, Nagle, T, Nakamura, B K, Nandi, M, Nara, J, Newby, P, Nilsson, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, M, Ono, V, Onuchin, A, Oskarsson, I, Otterlund, K, Oyama, K, Ozawa, D, Pal, A P T, Palounek, V S, Pantuev, V, Papavassiliou, J, Park, A, Parmar, S F, Pate, T, Peitzmann, J-C, Peng, V, Peresedov, C, Pinkenburg, R P, Pisani, F, Plasil, M L, Purschke, A K, Purwar, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, P, Rosnet, S S, Ryu, M E, Sadler, N, Saito, T, Sakaguchi, M, Sakai, S, Sakai, V, Samsonov, L, Sanfratello, R, Santo, H D, Sato, S, Sato, S, Sawada, Y, Schutz, V, Semenov, R, Seto, M R, Shaw, T K, Shea, T-A, Shibata, K, Shigaki, T, Shiina, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, J P, Sullivan, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, P, Tarján, J D, Tepe, T L, Thomas, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, S K, Tuli, H, Tydesjö, N, Tyurin, H W, van Hecke, J, Velkovska, M, Velkovsky, V, Veszprémi, L, Villatte, A A, Vinogradov, M A, Volkov, E, Vznuzdaev, X R, Wang, Y, Watanabe, S N, White, F K, Wohn, C L, Woody, W, Xie, Y, Yang, A, Yanovich, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, S J, Zhou, and L, Zolin
- Abstract
The PHENIX experiment has measured midrapidity transverse momentum spectra (0.4p(T)4.0 GeV/c) of single electrons as a function of centrality in Au+Au collisions at sqrt[s(NN)]=200 GeV. Contributions from photon conversions and Dalitz decays of light neutral mesons are measured by introducing a thin (1.7% X0) converter into the PHENIX acceptance and are statistically removed. The subtracted nonphotonic electron spectra are primarily due to the semileptonic decays of hadrons containing heavy quarks, mainly charm at lower p(T). For all centralities, the charm production cross section is found to scale with the nuclear overlap function, T(AA). For minimum-bias collisions the charm cross section per binary collision is N(cc )/T(AA)=622+/-57(stat)+/-160(syst) microb.
- Published
- 2004
50. Measurement of Nonrandom Event-by-Event Fluctuations of Average Transverse Momentum insNN=200 GeVAu+Auandp+pCollisions
- Author
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Steven Kelly, Y. I. Makdisi, I. Ravinovich, B. D. Fox, T. Peitzmann, Saskia Mioduszewski, S. Bathe, F. Plasil, Jason Newby, J. Murata, M. J. Tannenbaum, H. Tsuruoka, H. W. Van Hecke, S. S. Ryu, J. E. Frantz, Norio Saito, Herve Borel, Kensuke Homma, R. A. Soltz, Yehan Liu, S. Afanasiev, A. Glenn, M. Issah, A. Taketani, E. Melnikov, A. Ster, N. Kamihara, V. V. Ikonnikov, Yves Roland Schutz, Martin Purschke, S. Zhou, Shih-Chang Lee, F. Matathias, S. Chernichenko, H. Lim, Masamichi Ishihara, T. E. Miller, E. Vznuzdaev, K. S. Sim, Y. J. Kwon, D. Bucher, B. Bassalleck, F. Mühlbacher, M. Grosse Perdekamp, R. Santo, A. Enokizono, L. Ewell, Alexander Milov, Minghui Liu, D. Pal, J. Chiba, V. Bumazhnov, T. Shiina, A. Drees, J. B. Choi, M. Sakai, E. J. Desmond, D. Kotchetkov, S. Bhagavatula, L. Sanfratello, S. Kametani, S. Borenstein, M. Heffner, R. Azmoun, E. M. Takagui, F. Messer, R. S. Towell, V. Babintsev, M. Hibino, Kenneth Francis Read, G. C. Mishra, D. Mukhopadhyay, J. Park, Takao Sakaguchi, Y. Cobigo, Wei Xie, M. A. Volkov, T. Ichihara, Z. Fraenkel, O. Drapier, J. T. Mitchell, David Olle Rickard Silvermyr, C. Klein-Boesing, J. H. Kang, A. Deshpande, A. D. Frawley, C. A. Ogilvie, K. Imai, E. P. Hartouni, Vladislav Manko, J. S. Haggerty, T. K. Hemmick, R. K. Choudhury, V.A. Onuchin, A. Romana, S. Sawada, J. D. Tepe, G. Gogiberidze, D. P. Morrison, M. Chiu, Ajit Kumar Mohanty, T. A. Shibata, S. Belikov, K. S. Joo, Yasuo Miake, M. D. Marx, R. Amirikas, W. C. Chang, P. Chand, A. Franz, K. Kiyoyama, N. Grau, S. H. Aronson, S. S. Kapoor, V. S. Pantuev, I. E. Yushmanov, L. Kochenda, T. Chujo, C. Y. Chi, V. E. Semenov, Eun-Hee Kim, X. Camard, P. Tarján, Y. Kuroki, B. K. Nandi, C. L. Woody, W. Holzmann, Margaret Harvey, Alexei Khanzadeev, H. J. Kim, W. Y. Jang, B. Khachaturov, A. Parmar, N. Bruner, E. Stenlund, S. Butsyk, Christine Angela Aidala, H. Kobayashi, T. Matsumoto, D. Isenhower, Junji Tojo, A. G. Litvinenko, L. Aphecetche, Vladimir Samsonov, I. Otterlund, German Martinez, Y. Yang, Agneta Oskarsson, S. P. Sorensen, S. F. Pate, P. W. Stankus, Jen-Chieh Peng, C. P. Singh, D. W. Kim, G. R. Young, B. M. Johnson, Y. Berdnikov, Y. Akiba, K. Okada, S. S. Adler, Joakim Nystrand, X. R. Wang, G. S. Kyle, James Alexander, A. Isupov, S. P. Stoll, S. Nagamiya, Kazuhiro Tanaka, H. En'yo, T. C. Awes, P. Constantin, M. J. Leitch, Klaus Johannes Reygers, Y. Watanabe, O. Dietzsch, Y. Jeong, R. Averbeck, Byung-Sik Hong, Kyoichiro Ozawa, L. Villatte, Jun Kikuchi, J. L. Nagle, G. Bunce, Dong Jo Kim, A. Bazilevsky, Peter M. Nilsson, Philippe Rosnet, Brian Cole, H. Delagrange, T. Kohama, D. Jouan, J. S. Chai, David D'Enterria, Jan Rak, W. Guryn, Alexandre Lebedev, A. Kozlov, D. M. Lee, V. Papavassiliou, Dipanwita Dutta, R. Lacey, P. L. McGaughey, Senta Greene, R. P. Pisani, R. Granier de Cassagnac, M. Nara, I. Tserruya, R. Seto, A. Soldatov, Yu. Efremenko, M. Kopytine, J. M. Burward-Hoy, Nikolay Tyurin, V. Singh, G. B. Kim, D. Koehler, C. L. Silva, J. G. Lajoie, Hideki Hamagaki, G. David, C. H. Kuberg, T. Hachiya, Julia Velkovska, Hirohiko Sato, S. K. Tuli, V. P. Ladygin, S. Garpman, Susumu Sato, M. Muniruzzaman, H. A. Gustafsson, E. O'Brien, P. J. Kroon, K. Tanida, V. I. Kochetkov, R. E. Mischke, C. Zhang, M. Rosati, Dong-Hun Kim, M. Velkovsky, Y. Tanaka, T. K. Shea, I. J. Choi, Alberto Baldisseri, K. N. Barish, Viktor Riabov, I. V. Sourikova, H. Torii, M. Ono, F. Staley, Charles Maguire, S. Leckey, A. A. Vinogradov, Henrik Tydesjö, M. L. Brooks, R. du Rietz, Josh Moss, M. Tamai, X. He, E. Kistenev, V. Peresedov, Jiangyong Jia, Y. Goto, J. G. Boissevain, H. Masui, W. A. Zajc, K. Katou, V. Baublis, A. Denisov, V. Cianciolo, A. Kiyomichi, C. Pinkenburg, A. G. Hansen, Shingo Sakai, T. L. Thomas, Sergey Fokin, M. Stepanov, G. Roche, Ryugo S. Hayano, J. Gosset, Y. Riabov, J. P. Sullivan, Kenta Shigaki, A. S. Nyanin, A. Hoover, S. Yokkaichi, J. M. Heuser, S. Batsouli, A. P.T. Palounek, M. Gonin, K. Kurita, M. Sivertz, Hiroaki Ohnishi, J. Milan, H. Buesching, Xingguo Li, D. E. Fields, B. V. Jacak, A. K. Purwar, N. N. Ajitanand, Takahiro Nakamura, M. E. Sadler, A. Durum, D. S. Brown, S. Y. Fung, John Hill, K. Oyama, Toru Sugitate, François Fleuret, S. N. White, W. E. Sondheim, Osamu Jinnouchi, F. K. Wohn, T. K. Ghosh, Matthew G. Reuter, I. D. Ojha, Alexander Malakhov, L. S. Zolin, S. Esumi, P. D. Barnes, A. Yanovich, K. El Chenawi, M. R. Shaw, S. C. Johnson, Y. J. Mao, and M. J. Kweon
- Subjects
Physics ,Momentum (technical analysis) ,Range (particle radiation) ,010308 nuclear & particles physics ,General Physics and Astronomy ,Collision ,01 natural sciences ,Nuclear physics ,Particle emission ,0103 physical sciences ,Transverse momentum ,Particle ,Atomic physics ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider ,Event (particle physics) - Abstract
Event-by-event fluctuations of the average transverse momentum of produced particles near midrapidity have been measured by the PHENIX Collaboration in square root of (sNN)=200 GeV Au+Au, and p+p collisions at the Relativistic Heavy Ion Collider. The fluctuations are observed to be in excess of the expectation for statistically independent particle emission for all centralities. The excess fluctuations exhibit a dependence on both the centrality of the collision and on the pT range over which the average is calculated. Both the centrality and pT dependence can be well reproduced by a simulation of random particle production with the addition of contributions from hard-scattering processes.
- Published
- 2004
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