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Journal Articles

Event structure and double helicity asymmetry in jet production from polarized $$p + p$$ collisions at $$sqrt{s}$$ = 200 GeV

Adare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.

Physical Review D, 84(1), p.012006_1 - 012006_18, 2011/07

 Times Cited Count:25 Percentile:72.31(Astronomy & Astrophysics)

We report on the event structure and double helicity asymmetry ($$A_{LL}$$) of jet production in longitudinally polarized $$p + p$$ collisions at $$sqrt{s}$$ = 200 GeV. Photons and charged particles were measured by the PHENIX experiment. Event structure was compared with the results from PYTHIA event generator. The production rate of reconstructed jets is satisfactorily reproduced with the next-to-leading-order perturbative QCD calculation. We measured $$A_{LL}$$ = -0.0014 $$pm$$ 0.0037 at the lowest $$P_T$$ bin and -0.0181 $$pm$$ 0.0282 at the highest $$P_T$$ bin. The measured $$A_{LL}$$ is compared with the predictions that assume various $$Delta G(x)$$ distributions.

Journal Articles

Identified charged hadron production in $$p + p$$ collisions at $$sqrt{s}$$ = 200 and 62.4 GeV

Adare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Armendariz, R.*; et al.

Physical Review C, 83(6), p.064903_1 - 064903_29, 2011/06

 Times Cited Count:156 Percentile:99.42(Physics, Nuclear)

Transverse momentum distributions and yields for $$pi^{pm}, K^{pm}, p$$, and $$bar{p}$$ in $$p + p$$ collisions at $$sqrt{s}$$ = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the RHIC. We present the inverse slope parameter, mean transverse momentum, and yield per unit rapidity at each energy, and compare them to other measurements at different $$sqrt{s}$$ collisions. We also present the scaling properties such as $$m_T$$ and $$x_T$$ scaling and discuss the mechanism of the particle production in $$p + p$$ collisions. The measured spectra are compared to next-to-leading order perturbative QCD calculations.

Journal Articles

Azimuthal correlations of electrons from heavy-flavor decay with hadrons in $$p+p$$ and Au+Au collisions at $$sqrt{s_{NN}}$$ = 200 GeV

Adare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Aramaki, Y.*; et al.

Physical Review C, 83(4), p.044912_1 - 044912_16, 2011/04

 Times Cited Count:8 Percentile:52.71(Physics, Nuclear)

Measurements of electrons from the decay of open-heavy-flavor mesons have shown that the yields are suppressed in Au+Au collisions compared to expectations from binary-scaled $$p+p$$ collisions. Here we extend these studies to two particle correlations where one particle is an electron from the decay of a heavy flavor meson and the other is a charged hadron from either the decay of the heavy meson or from jet fragmentation. These measurements provide more detailed information about the interaction between heavy quarks and the quark-gluon matter. We find the away-side-jet shape and yield to be modified in Au+Au collisions compared to $$p+p$$ collisions.

Journal Articles

Measurement of neutral mesons in $$p$$ + $$p$$ collisions at $$sqrt{s}$$ = 200 GeV and scaling properties of hadron production

Adare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.

Physical Review D, 83(5), p.052004_1 - 052004_26, 2011/03

 Times Cited Count:149 Percentile:98.49(Astronomy & Astrophysics)

The PHENIX experiment at RHIC has measured the invariant differential cross section for production of $$K^0_s$$, $$omega$$, $$eta'$$ and $$phi$$ mesons in $$p + p$$ collisions at $$sqrt{s}$$ = 200 GeV. The spectral shapes of all hadron transverse momentum distributions are well described by a Tsallis distribution functional form with only two parameters, $$n$$ and $$T$$, determining the high $$p_T$$ and characterizing the low $$p_T$$ regions for the spectra, respectively. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.

Journal Articles

Summary of benchmark experiments for simulation of fusion reactors using an annular blanket with a line deuterium-tritium source

Maekawa, Hiroshi; M.A.Abdou*; Oyama, Yukio; Konno, Chikara; Maekawa, Fujio; Ikeda, Yujiro; Kosako, Kazuaki*; Nakamura, Tomoo; M.Z.Youssef*; A.Kumar*; et al.

Fusion Technology, 28(2), p.296 - 304, 1995/09

no abstracts in English

Journal Articles

Neutronics integral experiments of annular blanket system simulating tokamak reactor configuration

Konno, Chikara; Oyama, Yukio; Maekawa, Fujio; Ikeda, Yujiro; Kosako, Kazuaki*; Maekawa, Hiroshi; M.A.Abdou*; Bennett, E. F.*; A.Kumar*; M.Z.Youssef*

Fusion Technology, 28(2), p.347 - 365, 1995/09

no abstracts in English

Journal Articles

Neutronics integral experiments of simulated fusion reactor blanket with various beryllium configurations using Deuterium-tritium neutrons

Konno, Chikara; Oyama, Yukio; Ikeda, Yujiro; ; ; Kosako, Kazuaki*; Maekawa, Hiroshi; Nakakawa, Masayuki; Mori, Takamasa; Nakamura, Tomoo; et al.

Fusion Technology, 28(2), p.273 - 295, 1995/09

no abstracts in English

Journal Articles

Concept and characteristics of a simulated line source for annular blanket experiments using an accelerator-based deuterium-tritium neutron source

Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; Kosako, Kazuaki*; Maekawa, Hiroshi; Nakamura, Tomoo; M.A.Abdou*; Bennett, E. F.*; A.Kumar*; *; et al.

Fusion Technology, 28(2), p.305 - 319, 1995/09

no abstracts in English

Journal Articles

Characteristics of a deuterium-tritium fusion source on a rotating target used in simulated fusion blanket experiments

Nakakawa, Masayuki; Mori, Takamasa; Kosako, Kazuaki*; Oyama, Yukio; Ikeda, Yujiro; Konno, Chikara; Maekawa, Hiroshi; *; M.A.Abdou*; Bennett, E. F.*; et al.

Fusion Technology, 28, p.39 - 55, 1995/08

no abstracts in English

Journal Articles

Design and techniques for fusion blanket neutronics experiments using an accelerator-based deuterium-tritium neutron source

Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; Maekawa, Fujio; Maekawa, Hiroshi; ; ; Nakamura, Tomoo; M.A.Abdou*; Bennett, E. F.*; et al.

Fusion Technology, 28(1), p.56 - 73, 1995/08

no abstracts in English

Journal Articles

Neutronics integral experiments of lithium-oxide fusion blanket with heterogeneous configurations using deuterium-tritium neutrons

Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; ; ; Kosako, Kazuaki*; Maekawa, Hiroshi; Nakakawa, Masayuki; Mori, Takamasa; Nakamura, Tomoo; et al.

Fusion Technology, 28(1), p.216 - 235, 1995/08

no abstracts in English

Journal Articles

Measurement techniques for fusion blanket neutronics experiments

Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; Maekawa, Fujio; Maekawa, Hiroshi; ; ; Nakamura, Tomoo; M.A.Abdou*; Bennett, E. F.*; et al.

Fusion Engineering and Design, 28, p.716 - 723, 1995/00

 Times Cited Count:5 Percentile:48.77

no abstracts in English

JAEA Reports

Phase III experiments of the JAERI/USDOE collaborative program on fusion blanket neutronics - Line source and annular blanket experiments, Volume I; Experiment

Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; Maekawa, Fujio; Kosako, Kazuaki*; Nakamura, Tomoo; Maekawa, Hiroshi; M.Z.Youssef*; A.Kumar*; M.A.Abdou*; et al.

JAERI-M 94-015, 193 Pages, 1994/02

JAERI-M-94-015.pdf:6.62MB

no abstracts in English

JAEA Reports

Phase IIC experiments of the USDOE/JAERI collaborative program on fusion blanket neutronics; Experiments and analysis of heterogeneous fusion blankets, Volume II: Analysis

Nakakawa, Masayuki; Kosako, Kazuaki*; Mori, Takamasa; Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; Yamaguchi, Seiya*; Tsuda, Koichi*; Maekawa, Hiroshi; *; et al.

JAERI-M 92-183, 106 Pages, 1992/12

JAERI-M-92-183.pdf:2.6MB

no abstracts in English

JAEA Reports

Phase IIC experiments of the JAERI/USDOE collaborative program on fusion blanket neutronics; Experiments and analysis of the heterogeneous fusion blankets, Volume I: Experimental results

Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; Yamaguchi, Seiya*; Tsuda, Koichi*; Maekawa, Hiroshi; *; Kosako, Kazuaki*; Nakakawa, Masayuki; Mori, Takamasa; et al.

JAERI-M 92-182, 151 Pages, 1992/12

JAERI-M-92-182.pdf:4.31MB

no abstracts in English

Journal Articles

Measurement and analysis of low energy neutron spectrum in a large cylindrical iron assembly bombarded by D-T neutrons

Konno, Chikara; Ikeda, Yujiro; Kosako, Kazuaki; Oyama, Yukio; Maekawa, Hiroshi; Nakamura, Tomoo; Bennett, E. F.*

Fusion Engineering and Design, 18, p.297 - 303, 1991/12

 Times Cited Count:15 Percentile:82.51(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Measurements of the source term for annular blanket experiment with a line source; Phase IIIA of JAERI/USDOE collaborative program on fusion neutronics

Konno, Chikara; Oyama, Yukio; Ikeda, Yujiro; Kosako, Kazuaki*; Maekawa, Hiroshi; Nakamura, Tomoo; A.Kumar*; M.Z.Youssef*; M.A.Abdou*; Bennett, E. F.*

Fusion Technology, 19(3), p.1885 - 1890, 1991/05

no abstracts in English

Journal Articles

Phase III experimental results of JAERI/USDOE collaborative program on fusion neutronics

Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; Maekawa, Hiroshi; Maekawa, Fujio; Kosako, Kazuaki*; Nakamura, Tomoo; A.Kumar*; M.Z.Youssef*; M.A.Abdou*; et al.

Fusion Engineering and Design, 18, p.203 - 208, 1991/00

 Times Cited Count:17 Percentile:85.01(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Phase IIA and IIB experiments of JAERI/US DOE collaborative program on fusion blanket neutronics; Neutronics experiment on beryllium configuration in a full-coverage blanket geometry

Oyama, Yukio; ; ; Ikeda, Yujiro; Konno, Chikara; Maekawa, Hiroshi; Nakamura, Tomoo; K.G.Porges*; Bennett, E. F.*; R.F.Mattas*

JAERI-M 89-215, 208 Pages, 1989/12

JAERI-M-89-215.pdf:19.1MB

no abstracts in English

Journal Articles

Phase-IIB experiment of JAERI/USDOE collaborative program on fusion blanket neutronics

Oyama, Yukio; ; ; Ikeda, Yujiro; Konno, Chikara; Maekawa, Hiroshi; Nakamura, Tomoo; K.G.Porges*; Bennett, E. F.*; R.F.Mattas*

Fusion Technology, 15(2), p.1293 - 1298, 1989/03

no abstracts in English

22 (Records 1-20 displayed on this page)