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Showing 2012 · nucl-exShow all

17 papers · 2 filters

nucl-ex2012★ 56 cited

Medium modification of jet fragmentation in Au+Au collisions at sqrt(s_NN)=200 GeV measured in direct photon-hadron correlations

A. Adare, S. Afanasiev, C. Aidala +559

The jet fragmentation function is measured with direct photon-hadron correlations in p+p and Au+Au collisions at sqrt(s_NN)=200 GeV. The p_T of the photon is an excellent approxima…

nucl-ex2012★ 128 cited

Isospin Decomposition of the Basic Double-Pionic Fusion in the Region of the ABC Effect

P. Adlarson, W. Augustyniak, W. Bardan +111

Exclusive and kinematically complete high-statistics measurements of the basic double pionic fusion reactions pn -> dpi0pi0, pn -> d pi+pi- and pp -> dpi+pi0 have been carried out…

nucl-ex2012★ 30 cited

Upsilon (1S+2S+3S) production in d+Au and p+p collisions at sqrt(s_NN)=200 GeV and cold-nuclear matter effects

A. Adare, S. Afanasiev, C. Aidala +491

The three Upsilon states, Upsilon(1S+2S+3S), are measured in d+Au and p+p collisions at sqrt(s_NN)=200 GeV and rapidities 1.2<|y|<2.2 by the PHENIX experiment at the Relativistic H…

nucl-ex2012★ 36 cited

Inclusive cross section and single-transverse-spin asymmetry for very forward neutron production in polarized p+p collisions at sqrt(s)=200 GeV

A. Adare, S. Afanasiev, C. Aidala +379

The energy dependence of the single-transverse-spin asymmetry, A_N, and the cross section for neutron production at very forward angles were measured in the PHENIX experiment at RH…

nucl-ex2012★ 32 cited

J/psi suppression at forward rapidity in Au+Au collisions at sqrt(s_NN)=39 and 62.4 GeV

A. Adare, C. Aidala, N. N. Ajitanand +361

We present measurements of the J/psi invariant yields in sqrt(s_NN)=39 and 62.4 GeV Au+Au collisions at forward rapidity (1.2<|y|<2.2). Invariant yields are presented as a function…

nucl-ex2012★ 88 cited

Cold-nuclear-matter effcts on heavy-quark production in d+Au collisions at sqrt(s_NN)=200 GeV

A. Adare, S. Afanasiev, C. Aidala +379

The PHENIX experiment has measured electrons and positrons at midrapidity from the decays of hadrons containing charm and bottom quarks produced in d+Au and p+p collisions at sqrt(…

nucl-ex2012★ 61 cited

Direct photon production in d+Au collisions at sqrt(s_NN)=200 GeV

A. Adare, S. S. Adler, S. Afanasiev +543

Direct photons have been measured in sqrt(s_NN)=200 GeV d+Au collisions at midrapidity. A wide p_T range is covered by measurements of nearly-real virtual photons (1<p_T<6 GeV/c) a…

nucl-ex2012★ 149 cited

Neutral pion production with respect to centrality and reaction plane in Au+Au collisions at sqrt(s_NN)=200 GeV

A. Adare, S. Afanasiev, C. Aidala +380

The PHENIX experiment has measured the production of neutral pions in Au+Au collisions at sqrt(s_NN)=200 GeV. The new data offer a fourfold increase in recorded luminosity, providi…

nucl-ex2012★ 79 cited

Observation of the Helium 7 Lambda hypernucleus by the (e,e'K+) reaction

S. N. Nakamura, A. Matsumura, Y. Okayasu +90

An experiment with a newly developed high-resolution kaon spectrometer (HKS) and a scattered electron spectrometer with a novel configuration was performed in Hall C at Jefferson L…

nucl-ex2012★ 32 cited

ABC Resonance Structure in the Double-Pionic Fusion to 4He

P. Adlarson, W. Augustyniak, W. Bardan +109

Exclusive and kinematically complete high-statistics measurements of the double pionic fusion reaction He have been performed in the energy range 0.8 - 1.4 GeV c…

nucl-ex2012★ 111 cited

Measurement of Direct Photons in Au+Au Collisions at sqrt(s_NN) = 200 GeV

S. Afanasiev, C. Aidala, N. N. Ajitanand +343

We report the measurement of direct photons at midrapidity in Au+Au collisions at sqrt{s_NN} = 200 GeV. The direct photon signal was extracted for the transverse-momentum range of…

nucl-ex2012★ 82 cited

Transverse-Momentum Dependence of the J/psi Nuclear Modification in d+Au Collisions at sqrt(s_NN)=200 GeV

A. Adare, S. Afanasiev, C. Aidala +379

We present measured J/psi production rates in d+Au collisions at sqrt(s_NN) = 200 GeV over a broad range of transverse momentum (p_T=0-14 GeV/c) and rapidity (-2.2<y<2.2). We const…

nucl-ex2012★ 36 cited

Nuclear-Modification Factor for Open-Heavy-Flavor Production at Forward Rapidity in Cu+Cu Collisions at sqrt(s_NN)=200 GeV

A. Adare, S. Afanasiev, C. Aidala +373

Background: Heavy-flavor production in p+p collisions tests perturbative-quantum-chromodynamics (pQCD) calculations. Modification of heavy-flavor production in heavy-ion collisions…

nucl-ex2012★ 48 cited

Evolution of pi^0 suppression in Au+Au collisions from sqrt(s_NN) = 39 to 200 GeV

A. Adare, S. Afanasiev, C. Aidala +367

Neutral-pion, pi^0, spectra were measured at midrapidity (|y|<0.35) in Au+Au collisions at sqrt(s_NN) = 39 and 62.4 GeV and compared to earlier measurements at 200 GeV in the 1<p_T…

nucl-ex2012★ 39 cited

Search for the pentaquark via the reaction at 1.92 GeV/

K. Shirotori, T. N. Takahashi, S. Adachi +65

The pentaquark baryon was searched for via the reaction in a missing-mass resolution of 1.4 MeV/(FWHM) at J-PARC. meson beams were incident on the l…

nucl-ex2012★ 79 cited

Deviation from quark-number scaling of the anisotropy parameter v_2 of pions, kaons, and protons in Au+Au collisions at sqrt(s_NN) = 200 GeV

A. Adare, S. Afanasiev, C. Aidala +381

Measurements of the anisotropy parameter v_2 of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum p_T, and transverse kinetic energy K…

nucl-ex2012★ 64 cited

Feasibility Study of Observing eta' Mesic Nuclei with (p,d) Reaction

Kenta Itahashi, Hiroyuki Fujioka, Hans Geissel +13

A novel method is proposed to measure eta'(958) meson bound states in 11C nuclei by missing mass spectroscopy of the 12C(p,d) reaction near the eta' production threshold. It is sho…