Showing papers by "Malgorzata Anna Janik published in 2004"
TL;DR: In this paper, the azimuthal anisotropy parameter v{sub 2} and the binary-collision scaled centrality ratio R{sub CP} for kaons and lambdas were measured at mid-rapidity in Au+Au collisions at {radical}s{sub NN} = 200 GeV.
Abstract: We present STAR measurements of the azimuthal anisotropy parameter v{sub 2} and the binary-collision scaled centrality ratio R{sub CP} for kaons and lambdas ({Lambda} + {bar {Lambda}}) at mid-rapidity in Au+Au collisions at {radical}s{sub NN} = 200 GeV. In combination, the v{sub 2} and R{sub CP} particle-type dependencies contradict expectations from partonic energy loss followed by standard fragmentation in vacuum. We establish p{sub T} {approx} 5 GeV/c as the value where the centrality dependent baryon enhancement ends. The K{sub S}{sup 0} and {Lambda} + {bar {Lambda}} v{sub 2} values are consistent with expectations of constituent-quark-number scaling from models of hadron formation by parton coalescence or recombination.
466 citations
TL;DR: Chemical and kinetic equilibrium model fits to data reveal strong radial flow and long duration from chemical to kinetic freeze-out in central Au+Au collisions at RHIC.
Abstract: Transverse mass and rapidity distributions for charged pions, charged kaons, protons and antiprotons are reported for {radical}sNN = 200 GeV pp and Au+Au collisions at RHIC. The transverse mass distributions are rapidity independent within |y| < 0.5, consistent with a boost-invariant system in this rapidity interval. Spectral shapes and relative particle yields are similar in pp and peripheral Au+Au collisions and change smoothly to central Au+Au collisions. No centrality dependence was observed in the kaon and antiproton production rates relative to the pion production rate from medium-central to central collisions. Chemical and kinetic equilibrium model fits to our data reveal strong radial flow and relatively long duration from chemical to kinetic freeze-out in central Au+Au collisions. The chemical freeze-out temperature appears to be independent of initial conditions at RHIC energies.
322 citations
TL;DR: In this paper, the authors reported the transverse mass and rapidity distributions for charged pions, charged kaons, protons, and antiprotons at RHIC and showed strong radial flow and long duration from chemical to kinetic freeze-out in central RHIC collisions.
Abstract: Transverse mass and rapidity distributions for charged pions, charged kaons, protons, and antiprotons are reported for $\sqrt{{s}_{NN}}=200\text{ }\text{ }\mathrm{GeV}$ $pp$ and $\mathrm{Au}+\mathrm{Au}$ collisions at Relativistic Heary Ion Collider (RHIC). Chemical and kinetic equilibrium model fits to our data reveal strong radial flow and long duration from chemical to kinetic freeze-out in central $\mathrm{Au}+\mathrm{Au}$ collisions. The chemical freeze-out temperature appears to be independent of initial conditions at RHIC energies.
285 citations
TL;DR: The first observations of the first harmonic (directed flow, v(1)) and the fourth harmonic (v(4), in the azimuthal distribution of particles with respect to the reaction plane in Au+Au collisions at the BNL Relativistic Heavy Ion Collider (RHIC).
Abstract: We report the first observations of the first harmonic (directed flow, v(1)) and the fourth harmonic (v(4)), in the azimuthal distribution of particles with respect to the reaction plane in Au+Au collisions at the BNL Relativistic Heavy Ion Collider (RHIC). Both measurements were done taking advantage of the large elliptic flow (v(2)) generated at RHIC. From the correlation of v(2) with v(1) it is determined that v(2) is positive, or in-plane. The integrated v(4) is about a factor of 10 smaller than v(2). For the sixth (v(6)) and eighth (v(8)) harmonics upper limits on the magnitudes are reported.
181 citations
TL;DR: A hydrodynamically inspired model fit to the Xi spectra seems to indicate that these multistrange particles experience a significant transverse flow effect, but are emitted when the system is hotter and the flow is smaller than values obtained from a combined fit to pi, K, p, and Lambdas.
Abstract: The transverse mass spectra and midrapidity yields for Xis and Omegas are presented. For the 10% most central collisions, the (Xi) over bar (+)/h(-) ratio increases from the Super Proton Synchrotron to the Relativistic Heavy Ion Collider energies while the Xi(-)/h(-) stays approximately constant. A hydrodynamically inspired model fit to the Xi spectra, which assumes a thermalized source, seems to indicate that these multistrange particles experience a significant transverse flow effect, but are emitted when the system is hotter and the flow is smaller than values obtained from a combined fit to pi, K, p, and Lambdas.
141 citations
TL;DR: In this article, the rho(0) peak in the invariant mass distribution is shifted by approximately 40 MeV/c(2) in minimum bias p+p interactions and approximately 70 MeV/(c 2 ) in peripheral Au+Au collisions.
Abstract: We report results on rho(770)(0)-->pi(+)pi(-) production at midrapidity in p+p and peripheral Au+Au collisions at sqrt[s(NN)]=200 GeV. This is the first direct measurement of rho(770)(0)-->pi(+)pi(-) in heavy-ion collisions. The measured rho(0) peak in the invariant mass distribution is shifted by approximately 40 MeV/c(2) in minimum bias p+p interactions and approximately 70 MeV/c(2) in peripheral Au+Au collisions. The rho(0) mass shift is dependent on transverse momentum and multiplicity. The modification of the rho(0) meson mass, width, and shape due to phase space and dynamical effects are discussed.
125 citations
TL;DR: Results on high transverse momentum charged particle emission with respect to the reaction plane are presented and stronger suppression is found in the back-to-back high-p(t) particle correlations for particles emitted out of plane compared to those emitted in plane.
Abstract: Results on high transverse momentum charged particle emission with respect to the reaction plane are presented for Au + Au collisions at square root s(NN)=200 GeV. Two- and four-particle correlations results are presented as well as a comparison of azimuthal correlations in Au + Au collisions to those in p + p at the same energy. The elliptic anisotropy v(2) is found to reach its maximum at p(t) approximately 3 GeV/c, then decrease slowly and remain significant up to p(t) approximately 7-10 GeV/c. Stronger suppression is found in the back-to-back high-p(t) particle correlations for particles emitted out of plane compared to those emitted in plane. The centrality dependence of v(2) at intermediate p(t) is compared to simple models based on jet quenching.
107 citations
University of Birmingham1, Panjab University, Chandigarh2, Variable Energy Cyclotron Centre3, Joint Institute for Nuclear Research4, Kent State University5, Indiana University6, Purdue University7, Ohio State University8, Wayne State University9, Goethe University Frankfurt10, University of Washington11, Brookhaven National Laboratory12, Rice University13, National Research Nuclear University MEPhI14, Argonne National Laboratory15, Lawrence Berkeley National Laboratory16, University of California, Davis17, Academy of Sciences of the Czech Republic18, Warsaw University of Technology19, University of California, Los Angeles20, Creighton University21, Yale University22, Tsinghua University23, University of California, Berkeley24, Indian Institute of Technology Bombay25, Max Planck Society26, Texas A&M University27, Valparaiso University28, University of Jammu29
TL;DR: In this paper, the first data on e{sup +}e{sup -} pair production accompanied by nuclear breakup in ultra-peripheral gold-gold collisions at a center of mass energy of 200 GeV per nucleon pair was presented.
Abstract: We present the first data on e{sup +}e{sup -} pair production accompanied by nuclear breakup in ultra-peripheral gold-gold collisions at a center of mass energy of 200 GeV per nucleon pair. The nuclear breakup requirement selects events at small impact parameters, where higher-order corrections to the pair production cross section should be enhanced. We compare the pair kinematic distributions with two calculations: one based on the equivalent photon approximation, and the other using lowest-order quantum electrodynamics (QED); the latter includes the photon virtuality. The cross section, pair mass, rapidity and angular distributions are in good agreement with both calculations. The pair transverse momentum, p{sub T}, spectrum agrees with the QED calculation, but not with the equivalent photon approach. We set limits on higher-order contributions to the cross section. The e{sup +} and e{sup -} p{sub T} spectra are similar, with no evidence for interference effects due to higher-order diagrams.
95 citations
University of Birmingham1, Panjab University, Chandigarh2, Variable Energy Cyclotron Centre3, Kent State University4, Joint Institute for Nuclear Research5, Indiana University6, Purdue University7, Ohio State University8, Wayne State University9, Goethe University Frankfurt10, Yale University11, University of Rajasthan12, University of Washington13, Brookhaven National Laboratory14, Rice University15, National Research Nuclear University MEPhI16, Academy of Sciences of the Czech Republic17, Argonne National Laboratory18, Lawrence Berkeley National Laboratory19, University of California, Davis20, Warsaw University of Technology21, University of Science and Technology of China22, University of California, Los Angeles23, Tsinghua University24, Creighton University25, University of California, Berkeley26, University of São Paulo27, Institute of Physics, Bhubaneswar28, Max Planck Society29, Texas A&M University30, Valparaiso University31, University of Jammu32
TL;DR: In this article, the authors measured the transverse energy (E{sub T}) distributions for Au+Au collisions at {radical}s{sub NN} = 200 GeV by the STAR collaboration at RHIC.
Abstract: Transverse energy (E{sub T}) distributions have been measured for Au+Au collisions at {radical}s{sub NN} = 200 GeV by the STAR collaboration at RHIC. E{sub T} is constructed from its hadronic and electromagnetic components, which have been measured separately. E{sub T} production for the most central collisions is well described by several theoretical models whose common feature is large energy density achieved early in the fireball evolution. The magnitude and centrality dependence of E{sub T} per charged particle agrees well with measurements at lower collision energy, indicating that the growth in E{sub T} for larger collision energy results from the growth in particle production. The electromagnetic fraction of the total E{sub T} is consistent with a final state dominated by mesons and independent of centrality.
68 citations
TL;DR: Azimuthally Sensitive Hanbury Brown-Twiss Interferometry in Au+Au Collisions at s N N = 200 GeV J.W. Harris, 45 M.M.S.
Abstract: We present the results of a systematic study of the shape of the pion distribution in coordinate space at freeze-out in Au+Au collisions at RHIC using two-pion Hanbury Brown-Twiss (HBT) interferometry. Oscillations of the extracted HBT radii vs. emission angle indicate sources elongated perpendicular to the reaction plane. The results indicate that the pressure and expansion time of the collision system are not sufficient to completely quench its initial shape.
65 citations
TL;DR: In this paper, the multiplicity densities for these particles scale with the negative hadron pseudo-rapidity density, and the charged kaon to pion ratios are K{sup +}/{pi}{sup -} = 0.002(stat) {+-} 0.022(syst) for the most central collisions.
01 Jan 2004
TL;DR: In this article, the pseudorapidity asymmetry and centrality dependence of charged hadron spectra in d+Au collisions at {radical}s{sub NN} = 200 GeV are presented.
Abstract: The pseudorapidity asymmetry and centrality dependence of charged hadron spectra in d+Au collisions at {radical}s{sub NN} = 200 GeV are presented. The charged particle density at mid-rapidity, its pseudorapidity asymmetry and centrality dependence are reasonably reproduced by a Multi-Phase Transport model, by HIJING, and by the latest calculations in a saturation model. Ratios of transverse momentum spectra between backward and forward pseudorapidity are above unity for p{sub T} below 5 GeV/c. The ratio of central to peripheral spectra in d+Au collisions shows enhancement at 2 < p{sub T} < 6 GeV/c, with a larger effect at backward rapidity than forward rapidity. Our measurements are in qualitative agreement with gluon saturation and in contrast to calculations based on incoherent multiple partonic scatterings.
TL;DR: In this paper, the rapidity and centrality dependence of proton and anti-proton transverse mass distributions from the STAR experiment at RHIC was investigated. But the authors did not consider the possibility of pre-hadronic collective expansion.
Abstract: We report on the rapidity and centrality dependence of proton and anti-proton transverse mass distributions from {sup 197}Au + {sup 197}Au collisions at {radical}s{sub NN} = 130 GeV as measured by the STAR experiment at RHIC. Our results are from the rapidity and transverse momentum range of |y| < 0.5 and 0.35 < p{sub t} < 1.00 GeV/c. For both protons and anti-protons, transverse mass distributions become more convex from peripheral to central collisions demonstrating characteristics of collective expansion. The measured rapidity distributions and the mean transverse momenta versus rapidity are flat within |y| < 0.5. Comparisons of our data with results from model calculations indicate that in order to obtain a consistent picture of the proton(anti-proton) yields and transverse mass distributions the possibility of pre-hadronic collective expansion may have to be taken into account.
TL;DR: In this article, the fractional contribution of the pi(0)->gammagamma decay to the inclusive photon spectrum decreases by 20%+/-5% between p(t)=1.65 GeV/c and p(T)=2.4 GeV /c in the most central events.
Abstract: We report inclusive photon measurements about midrapidity (\y\ gammagamma decay channel. The fractional contribution of the pi(0)-->gammagamma decay to the inclusive photon spectrum decreases by 20%+/-5% between p(t)=1.65 GeV/c and p(t)=2.4 GeV/c in the most central events, indicating that relative to pi(0)-->gammagamma decay the contribution of other photon sources is substantially increasing.
Journal Article•
TL;DR: Measurements of transverse energy distributions in Au+Au collisions at GeV s N N = 200 J.W.W Harris, 48 M.M.S.
Abstract: Measurements of transverse energy distributions in Au+Au collisions at GeV s N N = 200 J. Adams, 3 M.M. Aggarwal, 29 Z. Ahammed, 43 J. Amonett, 20 B.D. Anderson, 20 D. Arkhipkin, 13 G.S. Averichev, 12 Y. Bai, 27 J. Balewski, 17 O. Barannikova, 32 L.S. Barnby, 3 J. Baudot, 18 S. Bekele, 28 V.V. Belaga, 12 R. Bellwied, 46 J. Berger, 14 B.I. Bezverkhny, 48 S. Bharadwaj, 33 V.S. Bhatia, 29 H. Bichsel, 45 A. Billmeier, 46 L.C. Bland, 4 C.O. Blyth, 3 B.E. Bonner, 34 M. Botje, 27 A. Boucham, 38 A. Brandin, 25 A. Bravar, 4 M. Bystersky, 11 R.V. Cadman, 1 X.Z. Cai, 37 H. Caines, 48 M. Calder´ n de la Barca S´ nchez, 4 J. Carroll, 21 J. Castillo, 21 D. Cebra, 7 Z. Chajecki, 44 o a P. Chaloupka, 11 S. Chattopdhyay, 43 H.F. Chen, 36 Y. Chen, 8 J. Cheng, 41 M. Cherney, 10 A. Chikanian, 48 W. Christie, 4 J.P. Coffin, 18 T.M. Cormier, 46 J.G. Cramer, 45 H.J. Crawford, 6 D. Das, 43 S. Das, 43 M.M. de Moura, 35 A.A. Derevschikov, 31 L. Didenko, 4 T. Dietel, 14 W.J. Dong, 8 X. Dong, 36 J.E. Draper, 7 F. Du, 48 A.K. Dubey, 15 V.B. Dunin, 12 J.C. Dunlop, 4 M.R. Dutta Mazumdar, 43 V. Eckardt, 23 W.R. Edwards, 21 L.G. Efimov, 12 V. Emelianov, 25 J. Engelage, 6 G. Eppley, 34 B. Erazmus, 38 M. Estienne, 38 P. Fachini, 4 J. Faivre, 18 R. Fatemi, 17 J. Fedorisin, 12 K. Filimonov, 21 P. Filip, 11 E. Finch, 48 V. Fine, 4 Y. Fisyak, 4 K.J. Foley, 4 K. Fomenko, 12 J. Fu, 41 C.A. Gagliardi, 39 J. Gans, 48 M.S. Ganti, 43 L. Gaudichet, 38 F. Geurts, 34 V. Ghazikhanian, 8 P. Ghosh, 43 J.E. Gonzalez, 8 O. Grachov, 46 O. Grebenyuk, 27 D. Grosnick, 42 S.M. Guertin, 8 Y. Guo, 46 A. Gupta, 19 T.D. Gutierrez, 7 T.J. Hallman, 4 A. Hamed, 46 D. Hardtke, 21 J.W. Harris, 48 M. Heinz, 2 T.W. Henry, 39 S. Hepplemann, 30 B. Hippolyte, 48 A. Hirsch, 32 E. Hjort, 21 G.W. Hoffmann, 40 H.Z. Huang, 8 S.L. Huang, 36 E.W. Hughes, 5 T.J. Humanic, 28 G. Igo, 8 A. Ishihara, 40 P. Jacobs, 21 W.W. Jacobs, 17 M. Janik, 44 H. Jiang, 8 P.G. Jones, 3 E.G. Judd, 6 S. Kabana, 2 K. Kang, 41 M. Kaplan, 9 D. Keane, 20 V.Yu. Khodyrev, 31 J. Kiryluk, 22 A. Kisiel, 44 E.M. Kislov, 12 J. Klay, 21 S.R. Klein, 21 A. Klyachko, 17 D.D. Koetke, 42 T. Kollegger, 14 M. Kopytine, 20 L. Kotchenda, 25 M. Kramer, 26 P. Kravtsov, 25 V.I. Kravtsov, 31 K. Krueger, 1 C. Kuhn, 18 A.I. Kulikov, 12 A. Kumar, 29 C.L. Kunz, 9 R.Kh. Kutuev, 13 A.A. Kuznetsov, 12 M.A.C. Lamont, 48 J.M. Landgraf, 4 S. Lange, 14 F. Laue, 4 J. Lauret, 4 A. Lebedev, 4 R. Lednicky, 12 S. Lehocka, 12 M.J. LeVine, 4 C. Li, 36 Q. Li, 46 Y. Li, 41 S.J. Lindenbaum, 26 M.A. Lisa, 28 F. Liu, 47 L. Liu, 47 Q.J. Liu, 45 Z. Liu, 47 T. Ljubicic, 4 W.J. Llope, 34 H. Long, 8 R.S. Longacre, 4 M. Lopez-Noriega, 28 W.A. Love, 4 Y. Lu, 47 T. Ludlam, 4 D. Lynn, 4 G.L. Ma, 37 J.G. Ma, 8 Y.G. Ma, 37 D. Magestro, 28 S. Mahajan, 19 D.P. Mahapatra, 15 R. Majka, 48 L.K. Mangotra, 19 R. Manweiler, 42 S. Margetis, 20 C. Markert, 48 L. Martin, 38 J.N. Marx, 21 H.S. Matis, 21 Yu.A. Matulenko, 31 C.J. McClain, 1 T.S. McShane, 10 F. Meissner, 21 Yu. Melnick, 31 A. Meschanin, 31 M.L. Miller, 22 Z. Milosevich, 9 N.G. Minaev, 31 C. Mironov, 20 A. Mischke, 27 D. Mishra, 15 J. Mitchell, 34 B. Mohanty, 43 L. Molnar, 32 C.F. Moore, 40 M.J. Mora-Corral, 23 D.A. Morozov, 31 V. Morozov, 21 M.G. Munhoz, 35 B.K. Nandi, 43 T.K. Nayak, 43 J.M. Nelson, 3 P.K. Netrakanti, 43 V.A. Nikitin, 13 L.V. Nogach, 31 B. Norman, 20 S.B. Nurushev, 31 G. Odyniec, 21 A. Ogawa, 4 V. Okorokov, 25 M. Oldenburg, 21 D. Olson, 21 S.K. Pal, 43 Y. Panebratsev, 12 S.Y. Panitkin, 4 A.I. Pavlinov, 46 T. Pawlak, 44 T. Peitzmann, 27 V. Perevoztchikov, 4 C. Perkins, 6 W. Peryt, 44 V.A. Petrov, 13 S.C. Phatak, 15 R. Picha, 7 M. Planinic, 49 J. Pluta, 44 N. Porile, 32 J. Porter, 45 A.M. Poskanzer, 21 M. Potekhin, 4 E. Potrebenikova, 12 B.V.K.S. Potukuchi, 19 D. Prindle, 45 C. Pruneau, 46 J. Putschke, 23 G. Rai, 21 G. Rakness, 30 R. Raniwala, 33 S. Raniwala, 33 O. Ravel, 38 R.L. Ray, 40 S.V. Razin, 12 D. Reichhold, 32 J.G. Reid, 45 G. Renault, 38 F. Retiere, 21 A. Ridiger, 25 H.G. Ritter, 21 J.B. Roberts, 34 O.V. Rogachevskiy, 12 J.L. Romero, 7 A. Rose, 46 C. Roy, 38 L. Ruan, 36 I. Sakrejda, 21 S. Salur, 48 J. Sandweiss, 48 I. Savin, 13 P.S. Sazhin, 12 J. Schambach, 40 R.P. Scharenberg, 32 N. Schmitz, 23 L.S. Schroeder, 21 K. Schweda, 21 J. Seger, 10 P. Seyboth, 23 E. Shahaliev, 12 M. Shao, 36 W. Shao, 5 M. Sharma, 29 W.Q. Shen, 37 K.E. Shestermanov, 31 S.S. Shimanskiy, 12 F. Simon, 23 R.N. Singaraju, 43 G. Skoro, 12 N. Smirnov, 48 R. Snellings, 27 G. Sood, 42 P. Sorensen, 21 J. Sowinski, 17 J. Speltz, 18 H.M. Spinka, 1 B. Srivastava, 32 A. Stadnik, 12 T.D.S. Stanislaus, 42 R. Stock, 14 A. Stolpovsky, 46 M. Strikhanov, 25 B. Stringfellow, 32 A.A.P. Suaide, 35 E. Sugarbaker, 28 C. Suire, 4 M. Sumbera, 11 B. Surrow, 22 T.J.M. Symons, 21 A. Szanto de Toledo, 35 P. Szarwas, 44 A. Tai, 8 J. Takahashi, 35 A.H. Tang, 27 T. Tarnowsky, 32 D. Thein, 8 J.H. Thomas, 21 S. Timoshenko, 25 M. Tokarev, 12 T.A. Trainor, 45 S. Trentalange, 8 R.E. Tribble, 39 O. Tsai, 8 J. Ulery, 32 T. Ullrich, 4 D.G. Underwood, 1 A. Urkinbaev, 12 G. Van Buren, 4 M. van Leeuwen, 21 A.M. Vander Molen, 24 R. Varma, 16 I.M. Vasilevski, 13 A.N. Vasiliev, 31 R. Vernet, 18 S.E. Vigdor, 17 V.P. Viyogi, 43 S. Vokal, 12 S.A. Voloshin, 46 M. Vznuzdaev, 25 B. Waggoner, 10 F. Wang, 32 G. Wang, 20 G. Wang, 5 X.L. Wang, 36 Y. Wang, 40 Y. Wang, 41 Z.M. Wang, 36 H. Ward, 40 J.W. Watson, 20 J.C. Webb, 17 R. Wells, 28 G.D. Westfall, 24 A. Wetzler, 21 C. Whitten Jr., 8 H. Wieman, 21 S.W. Wissink, 17 R. Witt, 2 J. Wood, 8 J. Wu, 36 N. Xu, 21 Z. Xu, 4 Z.Z. Xu, 36 E. Yamamoto, 21 P. Yepes, 34 V.I. Yurevich, 12 Y.V. Zanevsky, 12 H. Zhang, 4 W.M. Zhang, 20 Z.P. Zhang, 36 P.A Zolnierczuk, 17 R. Zoulkarneev, 13 Y. Zoulkarneeva, 13 and A.N. Zubarev 12 (STAR Collaboration) arXiv:nucl-ex/0407003 v1 2 Jul 2004
01 Jan 2004
TL;DR: An overview of the strangeness measurements made by the STAR collaboration at RHIC for Au-Au collisions at √s NN = 130 and 200 GeV plus p-p collisions at nN = 200GeV is presented in this article.
Abstract: An overview of the strangeness measurements made by the STAR collaboration at RHIC for Au-Au collisions at √s NN = 130 and 200 GeV plus p-p collisions at √s NN = 200 GeV is presented. A wealth of information has been generated on the kinematics and scale of strange particle production by this experiment. When viewed in combination a picture emerges of particles demonstrating a surprisingly high degree of collective motion, suggestive of strong internal pressure within the source which builds up rapidly. The non-resonance yields are consistent with statistical hadron formation. Although there appears to be a rapid decoupling of the source, resonance particle measurements show signs of rescattering during the hadronic phase. Meanwhile the observed suppression of high momentum probes and their large azimuthal asymmetry indicate that this hot dense matter has significant interactions with particles moving through it.
TL;DR: In this paper, Star measurements of charged hadron production as a function of centrality in Au+Au collisions at {radical}(s{sub NN})=130 GeV are presented.
Abstract: We present STAR measurements of charged hadron production as a function of centrality in Au+Au collisions at {radical}(s{sub NN})=130 GeV. The measurements cover a phase space region of 0.2 p{sub T}{sup cut}, and studied the results in the framework of participant and binary scaling. No clear evidence is observed for participant scaling of charged hadron yield in the measured p{sub T} region. The relative importance of hard scattering processes is investigated through binary scaling fraction of particle production.
Journal Article•
TL;DR: Photon and neutral pion production in Au+Au collisions at s NN = 130 GeV J.W.Hjort, 18 G.M. Aggarwal, 25 Z. Ahammed, 28 J.D. Bhardwaj, 29 P. Ghazikhanian, 6 P.E. Ghosh, 38 J.S. Gagliardi, 35 M.A. Ganti, 38 T.G. Harris, 43 M
Abstract: Photon and neutral pion production in Au+Au collisions at s NN = 130 GeV J. Adams, 3 C. Adler, 12 M.M. Aggarwal, 25 Z. Ahammed, 28 J. Amonett, 17 B.D. Anderson, 17 M. Anderson, 5 D. Arkhipkin, 11 G.S. Averichev, 10 S.K. Badyal, 16 J. Balewski, 13 O. Barannikova, 28, 10 L.S. Barnby, 17 J. Baudot, 15 S. Bekele, 24 V.V. Belaga, 10 R. Bellwied, 41 J. Berger, 12 B.I. Bezverkhny, 43 S. Bhardwaj, 29 P. Bhaskar, 38 A.K. Bhati, 25 H. Bichsel, 40 A. Billmeier, 41 L.C. Bland, 2 C.O. Blyth, 3 B.E. Bonner, 30 M. Botje, 23 A. Boucham, 34 A. Brandin, 21 A. Bravar, 2 R.V. Cadman, 1 X.Z. Cai, 33 H. Caines, 43 M. Calder´ n de la Barca S´ nchez, 2 J. Carroll, 18 o a J. Castillo, 18 M. Castro, 41 D. Cebra, 5 P. Chaloupka, 9 S. Chattopadhyay, 38 H.F. Chen, 32 Y. Chen, 6 S.P. Chernenko, 10 M. Cherney, 8 A. Chikanian, 43 B. Choi, 36 W. Christie, 2 J.P. Coffin, 15 T.M. Cormier, 41 J.G. Cramer, 40 H.J. Crawford, 4 D. Das, 38 S. Das, 38 A.A. Derevschikov, 27 L. Didenko, 2 T. Dietel, 12 X. Dong, 32, 18 J.E. Draper, 5 F. Du, 43 A.K. Dubey, 14 V.B. Dunin, 10 J.C. Dunlop, 2 M.R. Dutta Majumdar, 38 V. Eckardt, 19 L.G. Efimov, 10 V. Emelianov, 21 J. Engelage, 4 G. Eppley, 30 B. Erazmus, 34 M. Estienne, 34 P. Fachini, 2 V. Faine, 2 J. Faivre, 15 R. Fatemi, 13 K. Filimonov, 18 P. Filip, 9 E. Finch, 43 Y. Fisyak, 2 D. Flierl, 12 K.J. Foley, 2 J. Fu, 42 C.A. Gagliardi, 35 M.S. Ganti, 38 T.D. Gutierrez, 5 N. Gagunashvili, 10 J. Gans, 43 L. Gaudichet, 34 M. Germain, 15 F. Geurts, 30 V. Ghazikhanian, 6 P. Ghosh, 38 J.E. Gonzalez, 6 O. Grachov, 41 V. Grigoriev, 21 S. Gronstal, 8 D. Grosnick, 37 M. Guedon, 15 S.M. Guertin, 6 A. Gupta, 16 E. Gushin, 21 T.J. Hallman, 2 D. Hardtke, 18 J.W. Harris, 43 M. Heinz, 43 T.W. Henry, 35 S. Heppelmann, 26 T. Herston, 28 B. Hippolyte, 43 A. Hirsch, 28 E. Hjort, 18 G.W. Hoffmann, 36 M. Horsley, 43 H.Z. Huang, 6 S.L. Huang, 32 T.J. Humanic, 24 G. Igo, 6 A. Ishihara, 36 P. Jacobs, 18 W.W. Jacobs, 13 M. Janik, 39 I. Johnson, 18 P.G. Jones, 3 E.G. Judd, 4 S. Kabana, 43 M. Kaneta, 18 M. Kaplan, 7 D. Keane, 17 J. Kiryluk, 6 A. Kisiel, 39 J. Klay, 18 S.R. Klein, 18 A. Klyachko, 13 D.D. Koetke, 37 T. Kollegger, 12 A.S. Konstantinov, 27 M. Kopytine, 17 L. Kotchenda, 21 A.D. Kovalenko, 10 M. Kramer, 22 P. Kravtsov, 21 K. Krueger, 1 C. Kuhn, 15 A.I. Kulikov, 10 A. Kumar, 25 G.J. Kunde, 43 C.L. Kunz, 7 R.Kh. Kutuev, 11 A.A. Kuznetsov, 10 M.A.C. Lamont, 3 J.M. Landgraf, 2 S. Lange, 12 C.P. Lansdell, 36 B. Lasiuk, 43 F. Laue, 2 J. Lauret, 2 A. Lebedev, 2 R. Lednick´ , 10 V.M. Leontiev, 27 M.J. LeVine, 2 C. Li, 32 y Q. Li, 41 S.J. Lindenbaum, 22 M.A. Lisa, 24 F. Liu, 42 L. Liu, 42 Z. Liu, 42 Q.J. Liu, 40 T. Ljubicic, 2 W.J. Llope, 30 H. Long, 6 R.S. Longacre, 2 M. Lopez-Noriega, 24 W.A. Love, 2 T. Ludlam, 2 D. Lynn, 2 J. Ma, 6 Y.G. Ma, 33 D. Magestro, 24 S. Mahajan, 16 L.K. Mangotra, 16 D.P. Mahapatra, 14 R. Majka, 43 R. Manweiler, 37 S. Margetis, 17 C. Markert, 43 L. Martin, 34 J. Marx, 18 H.S. Matis, 18 Yu.A. Matulenko, 27 T.S. 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