Author: "Kazuyoshi Kurita" - Searchworks@Jio Institute Digital Library Search Results

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96 results on '"Kazuyoshi Kurita"'

1. Fringing-RF-Field-Activated DC-to-Pulse Converter at the SCRIT Electron Scattering Facility

Author: Kohei Yamada, Masamitsu Watanabe, Mamoru Togasaki, Ryota Toba, Tetsuya Ohnishi, Masanori Wakasugi, and Kazuyoshi Kurita
Subjects: Materials science, Optics, business.industry, business, Electron scattering, Rf field, Pulse (physics)
Published: 2021

2. First Result from the SCRIT Electron Scattering Facility with 132Xe Target

Author: Keita Kasama, Shinnosuke Sasamura, Sinnichi Ichikawa, Kousuke Adachi, Toshimi Suda, Masanori Wakasugi, A. Enokizono, K. Yamada, Kyo Tsukada, Kazuyoshi Kurita, Toshitada Hori, Tadaaki Tamae, Mamoru Togasaki, Masahiro Hara, Tetsuya Ohnishi, Mitsuki Hori, Masamitsu Watanabe, T. Fujita, K. Namba, and Nobuaki Uchida
Subjects: Nuclear physics, Physics, Electron scattering
Published: 2021

3. The SCRIT Electron Scattering Facility at RIKEN RI Beam Factory

Author: Takahiro Fujita, Nobuaki Uchida, Masamitsu Watanabe, Tetsuya Ohnishi, Mitsuki Hori, Tadaaki Tamae, Shin-ichi Ichikawa, Kousuke Adachi, Mamoru Togasaki, Masahiro Hara, Masanori Wakasugi, Kazuyoshi Kurita, Kyo Tsukada, Toshitada Hori, A. Enokizono, K. Yamada, and Toshimi Suda
Subjects: Nuclear physics, Physics, Factory (object-oriented programming), Electron scattering, Beam (structure)
Published: 2021

4. Properties of Ion Trapping inside the Electron Storage Ring at the SCRIT Experiment

Author: Keita Kasama, Masamitsu Watanabe, Toshitada Hori, Shinnosuke Sasamura, Kyo Tsukada, Shin-ichi Ichikawa, Kohei Yamada, Takahiro Fujita, Tetsuya Ohnishi, Kazuyoshi Kurita, K. Namba, Kosuke Adachi, Nobuaki Uchida, A. Enokizono, Mitsuki Hori, Toshimi Suda, Tadaaki Tamae, Mamoru Togasaki, Masahiro Hara, and Masanori Wakasugi
Subjects: Electron storage, Materials science, Ring (chemistry), Ion trapping, Molecular physics
Published: 2021

5. Evaluation of radioactivity in the bodies of mice induced by neutron exposure from an epi-thermal neutron source of an accelerator-based boron neutron capture therapy system

Author: Yoshihisa Abe, Shie Nishioka, Satoshi Nakamura, Kotaro Iijima, Akihisa Wakita, Mitsuko Masutani, Kazuyoshi Kurita, Jun Itami, Hiroshi Igaki, Hiroyuki Okamoto, Shoji Imamichi, Kazuma Kobayashi, Masashi Ito, Teiji Nishio, and Kazuyoshi Masumoto
Subjects: Male, Nuclear reaction, Materials science, General Physics and Astronomy, Induced radioactivity, Boron Neutron Capture Therapy, 010403 inorganic & nuclear chemistry, 01 natural sciences, 030218 nuclear medicine & medical imaging, Mice, 03 medical and health sciences, Radiation Protection, 0302 clinical medicine, Nuclear Reactors, Neutron flux, Animals, Humans, Neutron, Nuclide, Neutrons, Radioisotopes, induced radioactivity, radioactivation, Radiochemistry, Neutron Activation Analysis, General Medicine, boron neutron capture therapy (BNCT), Neutron temperature, 0104 chemical sciences, Mice, Inbred C57BL, Neutron capture, Cell killing, Original Article, General Agricultural and Biological Sciences, accelerator-based BNCT
Abstract: This study aimed to evaluate the residual radioactivity in mice induced by neutron irradiation with an accelerator-based boron neutron capture therapy (BNCT) system using a solid Li target. The radionuclides and their activities were evaluated using a high-purity germanium (HP-Ge) detector. The saturated radioactivity of the irradiated mouse was estimated to assess the radiation protection needs for using the accelerator-based BNCT system. 24Na, 38Cl, 80mBr, 82Br, 56Mn, and 42K were identified, and their saturated radioactivities were (1.4 ± 0.1) × 102, (2.2 ± 0.1) × 101, (3.4 ± 0.4) × 102, 2.8 ± 0.1, 8.0 ± 0.1, and (3.8 ± 0.1) × 101 Bq/g/mA, respectively. The 24Na activation rate at a given neutron fluence was found to be consistent with the value reported from nuclear-reactor-based BNCT experiments. The induced activity of each nuclide can be estimated by entering the saturated activity of each nuclide, sample mass, irradiation time, and proton current into the derived activation equation in our accelerator-based BNCT system.
Published: 2017

6. Electron scattering from 208Pb and 132Xe ions at the SCRIT facility

Author: Toshimi Suda, Masanori Wakasugi, Tadaaki Tamae, Mamoru Togasaki, Masahiro Hara, Toshitada Hori, Keita Kasama, Tetsuya Ohnishi, Kazuyoshi Kurita, Kyo Tsukada, Masamitsu Watanabe, Mitsuki Hori, Kousuke Adachi, A. Enokizono, K. Namba, Takahiro Fujita, Shin-ichi Ichikawa, and K. Yamada
Subjects: Physics, Elastic scattering, Nuclear and High Energy Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Momentum transfer, Nuclear structure, Charge density, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, Ion, Nuclear physics, 0103 physical sciences, Atomic nucleus, Physical and Theoretical Chemistry, 010306 general physics, Electron scattering
Abstract: We constructed the SCRIT (Self-Confining Radioactive Ion Target) electron scattering facility to realize electron scattering off short-lived unstable nuclei at RIKEN in Japan. Electron scattering is one of the most powerful and reliable tools to study structures of atomic nuclei. However, it has been extremely difficult to apply electron scattering to unstable nuclei because of target preparation problems. SCRIT is a novel ion-trapping technique that achieves high luminosity of more than 1027 cm-?2s-?1 with a small amount of target ions. Following completion of the facility, a series of commissioning experiments of the entire facility with several stable nuclear targets, including 208Pb and 132Xe, were performed. Momentum transfer distributions of elastic scattering from those targets were successfully measured at several electron beam energies, and the charge density distribution of the 132Xe nucleus was extracted for the first time.
Published: 2019

7. Different mechanism of two-proton emission from proton-rich nuclei 23Al and 22Mg

Author: Kazuyoshi Kurita, H. Kimura, Satoshi Takeuchi, Min Wang, P. Zhou, Y. Hara, D. Q. Fang, Takeo Kawabata, K. Okada, Hiroyoshi Sakurai, E. Takeshita, T. Motobayashi, H. Baba, Z. G. Hu, T. Honda, S. Kanno, R. Shioda, Shuichi Ota, X. Z. Cai, Kazuo Ieki, A. Ozawa, J. G. Chen, Y. Yasuda, H. Ooishi, Yasuhiro Togano, Kenichiro Yoneda, Guoqiang Zhang, Wendong Tian, Y. Ito, Y. Fu, Susumu Shimoura, W. Guo, H. Murakami, Meiko Kurokawa, Xi-Guang Cao, XY Sun, Tetsuaki Moriguchi, Naohito Iwasa, Jian-Song Wang, Yoko Ishibashi, Yosuke Kondo, Nori Aoi, Yu-Gang Ma, Y. Yamada, H. W. Wang, and K. Yamada
Subjects: Physics, Nuclear and High Energy Physics, Nuclear Theory, Proton, FOS: Physical sciences, lcsh:QC1-999, Nuclear Theory (nucl-th), Momentum, Excited state, Physics::Accelerator Physics, Nuclear Experiment (nucl-ex), Proton emission, Atomic physics, Nuclear Experiment, Nuclear theory, Beam (structure), lcsh:Physics
Abstract: Two-proton relative momentum ($q_{pp}$) and opening angle ($\theta_{pp}$) distributions from the three-body decay of two excited proton-rich nuclei, namely $^{23}$Al $\rightarrow$ p + p + $^{21}$Na and $^{22}$Mg $\rightarrow$ p + p + $^{20}$Ne, have been measured with the projectile fragment separator (RIPS) at the RIKEN RI Beam Factory. An evident peak at $q_{pp}\sim20$ MeV/c as well as a peak in $\theta_{pp}$ around 30$^\circ$ are seen in the two-proton break-up channel from a highly-excited $^{22}$Mg. In contrast, such peaks are absent for the $^{23}$Al case. It is concluded that the two-proton emission mechanism of excited $^{22}$Mg is quite different from the $^{23}$Al case, with the former having a favorable diproton emission component at a highly excited state and the latter dominated by the sequential decay process.
Published: 2015
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8. First Result from Scrit Electron Scattering Facility : Charge Density Distribution Of 132 Xe

Author: Keita Kasama, Shinnichi Ichikawa, Toshimi Suda, Shinnosuke Sasamura, K. Yamada, Kyo Tsukada, Masamitsu Watanabe, T. Fujita, Kousuke Adachi, Kazuyoshi Kurita, A. Enokizono, Mitsuki Hori, Masanori Wakasugi, Tadaaki Tamae, Mamoru Togasaki, Masahiro Hara, Tetsuya Ohnishi, K. Namba, and Nobuaki Uchida
Subjects: Physics, Luminosity (scattering theory), Scattering, Nuclear Theory, Atomic nucleus, Charge density, Atomic physics, Nuclear Experiment, Electron scattering, Effective nuclear charge, Exotic atom, Ion
Abstract: We have constructed the SCRIT electron scattering facility at RIKEN in order to realize electron scattering off unstable nuclei. Because electron scattering is the most powerful and reliable tool to study the internal structure of the atomic nuclei as demonstrated for many stable nuclei in the latter half of the 20th century, actualization of electron scattering for the unstable nuclei has been long awaited. Recently, we have performed a series of elastic electron scattering experiments with $^{132}$Xe target. The high luminosity of around 10$^{27}$~cm$^{-2}$s$^{-1}$ which is a minimum-requirement for electron scattering is achieved with using only 10$^8$ target ions. By comparing with a DWBA calculation assuming the two-parameter Fermi distribution as the nuclear charge density distribution, it is found that a root-mean-square of radius is consistent with that from the measurement of X-ray of muonic atom and an information of surface shape of $^{132}$Xe nucleus is extracted for the first time.
Published: 2017

9. The Scrit Electron Scattering Facility At Riken RI Beam Factory

Author: Masamitu Watanabe, K. Namba, Takahiro Fujita, Toshitada Hori, Toshimi Suda, Keita Kasama, Nobuaki Uchida, Kyo Tsukada, Masanori Wakasugi, Kazuyoshi Kurita, Kosuke Adachi, Shin-ichi Ichikawa, Tadaaki Tamae, Mamoru Togasaki, Shinnosuke Sasamura, Mitsuki Hori, Masahiro Hara, K. Yamada, Takashi Kikuchi, Tetsuya Ohnishi, S. Wang, and A. Enokizono
Subjects: Nuclear physics, Physics, Elastic scattering, Luminosity (scattering theory), Electron spectrometer, Momentum transfer, Physics::Accelerator Physics, Electron, Nuclear Experiment, Electron scattering, Beam (structure), Ion
Abstract: The SCRIT (Self-Confining Radioactive-Isotope Ion Target) electron scattering facility has been constructed at the RIKEN RI Beam Factory. In the commissioning experiment, the ion-trapping properties of the SCRIT system were studied using stable ions. By using an electron spectrometer, the momentum transfer distribution of the electron elastic scattering of $^{132}$Xe was measured at 150, 200, and 300~MeV, and the charge density distribution was deduced. During the measurements, a luminosity of $1.8 \times$10$^{27}$~cm$^{-2}$s$^{-1}$ was achieved with a 250-mA electron beam and only 10$^8$ trapped ions. Production of RIs has begun in an electron-beam-driven RI separator, and developments are underway to increase the production rate of short-lived nuclei. Soon, measurements of electron elastic scattering by short-lived nuclei will be performed.
Published: 2017

10. The Performance Of The Scrit Detectors For Electron-RI Scattering Experiment

Author: Shinnosuke Sasamura, K. Yamada, Masamitsu Watanabe, Keita Kasama, Kyo Tsukada, S. Ichikawa, Nobuaki Uchida, A. Enokizono, Mitsuki Hori, Tadaaki Tamae, Mamoru Togasaki, K. Namba, Shou Wang, Tatsuya Ohnishi, Masahiro Hara, Kousuke Adachi, Takahiro Fujita, Toshitada Hori, Kazuyoshi Kurita, Masanori Wakasugi, and Toshimi Suda
Subjects: Physics, Nuclear physics, Angular momentum, Photon, Luminosity (scattering theory), Scattering, Bremsstrahlung, Electron, Photon energy, Electron scattering
Abstract: The SCRIT (Self-Confining RI Ion Target) facility has been constructed at RIKEN to make the electron-RI scattering experiment possible for the first time in the world. At SCRIT, the angular momentum distribution of scattered electrons is measured by WiSES (Window-frame Spectrometer for Electron Scattering) which consists of a dipole magnet and front/rear drift chambers, covering a solid angle of $\sim$80 mSr with an intrinsic momentum resolution of $\Delta p/p\sim10^{-3}$. Also the luminosity of the electron-RI scattering is estimated from bremsstrahlung photons measured by LMon (Luminosity Monitor) to obtain the absolute cross-section of the scattering. The LMon consists of a CsI calorimeter to measure the photon energy, and plastic fiber scintillators to measure the 2D hit distribution of the bremsstrahlung photons. In 2015-2016 the first physics experiment has been performed using $^{132}\rm Xe$ target, then the luminosity and angular distributions were successfully measured at the electron beam energy of 150-300 MeV, achieving a luminosity above $10^{27}cm^{-2}$s$^{-1}$. In this article, we present the performances of the WiSES and LMon detectors obtained by using the $^{132}\rm Xe$ experiment data.
Published: 2017

11. Application Of Recycled Tungsten Carbide Powder For Fabrication Of Iron Based Powder Metallurgy Alloy

Author: Yukinori Taniguchi, Kazuyoshi Kurita, Kohei Mizuta, Keigo Nishitani, and Ryuichi Fukuda
Subjects: powder metallurgy, recycle process, compression test, anti-wear ability, Tungsten carbide
Abstract: Tungsten carbide is widely used as a tool material in metal manufacturing process. Since tungsten is typical rare metal, establishment of recycle process of tungsten carbide tools and restore into cemented carbide material bring great impact to metal manufacturing industry. Recently, recycle process of tungsten carbide has been developed and established gradually. However, the demands for quality of cemented carbide tool are quite severe because hardness, toughness, anti-wear ability, heat resistance, fatigue strength and so on should be guaranteed for precision machining and tool life. Currently, it is hard to restore the recycled tungsten carbide powder entirely as raw material for new processed cemented carbide tool. In this study, to suggest positive use of recycled tungsten carbide powder, we have tried to fabricate a carbon based sintered steel which shows reinforced mechanical properties with recycled tungsten carbide powder. We have made set of newly designed sintered steels. Compression test of sintered specimen in density ratio of 0.85 (which means 15% porosity inside) has been conducted. As results, at least 1.7 times higher in nominal strength in the amount of 7.0 wt.% was shown in recycled WC powder. The strength reached to over 600 MPa for the Fe-WC-Co-Cu sintered alloy. Wear test has been conducted by using ball-on-disk type friction tester using 5 mm diameter ball with normal force of 2 N in the dry conditions. Wear amount after 1,000 m running distance shows that about 1.5 times longer life was shown in designed sintered alloy. Since results of tensile test showed that same tendency in previous testing, it is concluded that designed sintered alloy can be used for several mechanical parts with special strength and anti-wear ability in relatively low cost due to recycled tungsten carbide powder., {"references":["P.G. Barnard, A.G. Starliper, H.Kenworthy, \"Reclamation of refractory carbides from carbide materials\", US Patent 3595484, 1970.","P. Seegopaul, L. Wu, \"Reclamation process for tungsten carbide/cobalt using acid digestion\", US Patent 5728197, 1998.","Y. Ishlda, T. Itakura, H. Morlguchl, A. Ikegaya, \"Development of technologies for recycling cemented carbide scrap and reducing tungsten use in cemented carbide tools\", SEI Technical Review, no. 75, pp. 38-46, Oct. 2012.","T. Hayashi, F. Satoh, K. Sasaya, A. Ikegaya, \"Industrialization of tungsten recovering from used cemented carbide Tools\", SEI Technical Review, no. 82, pp. 33-38, Apr. 2016.","Japanese Ministry of Economy, Trade and Industry, \"Project of salvage enhancement of used tungsten carbide\", Reports on Possibility Investigation for 3Rs Systems, pp.8-13, Mar. 2012(in Japanese).","T. Ono, K. Kamada, M. Nakamura, T. Saitoh, \"Production technique and mechanical properties of recycled hard alloy reusing waste hard alloy powder\", Journal of Local Independent Administrative Agency Iwate Industrial Research Institute, vol. 10, pp. 37-40, 2003(in Japanese).","Japanese Ministry of Economy, Trade and Industry, \"Project of salvage enhancement of used tungsten carbide\", Reports on Possibility Investigation for 3Rs Systems, pp.19-23, Mar. 2012(in Japanese).","Japan Powder Metallurgy Association, 2015 JPMA Annual Report, pp. 8-10, July 2016.","A. Fujiki, \"Present Status of PM Automotive Parts\", Materia Japan, vol. 53, no. 12, pp.608-611, Dec. 2014 (in Japanese).\n[10]\tM.P. Groover, Fundamentals of Modern Manufacturing.\t3rd ed., Wiley, 1993, pp. 38–48."]}
Published: 2016
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12. Measurements on diproton emission from the break-up channels of 23Al and 22Mg

Author: H. Oishi, R. Shioda, Xi Guang Cao, Wei Guo, Zheng Guo Hu, Y. Fu, S. Kanno, A. Ozawa, H. Murakami, Yu-Gang Ma, Kazunari Yamada, Meng Wang, Nori Aoi, H. Kimura, Meiko Kurokawa, Tetsuaki Moriguchi, T. Motobayashi, Xiao Yan Sun, T. Honda, Yoko Ishibashi, Y. Itou, Kazuyoshi Kurita, W. D. Tian, Guoqiang Zhang, Y. Hara, H. Sakurai, Hidetada Baba, Y. Yasuda, Naohito Iwasa, P. Zhou, Shuichi Ota, Y. Yamada, D. Q. Fang, Hongwei Wang, Satoshi Takeuchi, Jian Song Wang, Kazuo Ieki, Yasuhiro Togano, E. Takeshita, Takeo Kawabata, Y. Kondo, Susumu Shimoura, X. Z. Cai, J. G. Chen, K. Okada, and Kenichiro Yoneda
Subjects: Nuclear physics, Physics, Momentum, Beamline, Break-Up, Projectile, law, Excited state, Cyclotron, General Physics and Astronomy, Atomic physics, Ring (chemistry), law.invention
Abstract: Two-proton relative momentum distributions from the break-up channels 23Al→p+p+21Na and 22Mg→p+p+20Ne at an energy of 60–70 A MeV have been measured together with two-proton opening angles at the projectile fragment separator beamline (RIPS) in the RIKEN Ring Cyclotron Facility. The results demonstrate the existence of diproton emission component from single-step 2He for highly excited 23Al and 22Mg.
Published: 2011

13. MEASUREMENT OF THE PROTON-PROTON CORRELATION FUNCTION FROM THE BREAK-UP OF 22Mg AND 20Ne

Author: H. Oishi, J. S. Wang, Satoshi Takeuchi, T. Honda, W. Guo, D. Q. Fang, Meng Wang, Hao Wang, K. Yamada, S. Kanno, P. Zhou, Naohito Iwasa, A. Ozawa, Susumu Shimoura, Hidetada Baba, Y. Itou, R. Shioda, X. Z. Cai, XY Sun, Takeo Kawabata, H. Kimura, Guoqiang Zhang, Wendong Tian, Kazuyoshi Kurita, K. Okada, H. Murakami, Meiko Kurokawa, J. G. Chen, Xi-Guang Cao, Kenichiro Yoneda, ZG Hu, Y. Fu, Kazuo Ieki, Yasuhiro Togano, E. Takeshita, Nori Aoi, Hiroyoshi Sakurai, T. Motobayashi, Shinsuke Ota, Y. Yamada, Tetsuaki Moriguchi, Yoko Ishibashi, Yosuke Kondo, Yu-Gang Ma, Y. Hara, and Y. Yasuda
Subjects: Physics, Nuclear and High Energy Physics, Cluster decay, Proton, Cyclotron, General Physics and Astronomy, law.invention, Nuclear physics, Momentum, Correlation function, law, Excited state, Center of mass, Atomic physics, Proton emission
Abstract: An experiment of 22 Mg and 20 Ne beams bombarding on a 12 C target at an energy of 60~70 A MeV has been performed at the RIKEN projectile fragment separator (RIPS) in the RIKEN Ring Cyclotron Facility to study the two-proton correlated emission from 22 Mg and 20 Ne excited states. The two-protons momentum correlation functions have been obtained for 22 Mg and 20 Ne , respectively. The trajectories of the 22 Mg decayed products (20 Ne + p + p ) were also measured to get the angular correlations between the two protons in Center of Mass of decaying system by relativistic-kinematics reconstruction. The results exhibit that 22 Mg has the features of 2 He cluster decay mechanism.
Published: 2010

14. MEASUREMENT OF TWO-PROTON CORRELATION FROM THE BREAK-UP OF 23Al

Author: Kazuyoshi Kurita, Kazuo Ieki, Guoqiang Zhang, Y. Itou, Wendong Tian, Nori Aoi, XY Sun, Yasuhiro Togano, H. Oishi, Tetsuaki Moriguchi, T. Honda, H. Murakami, W. Guo, Yoko Ishibashi, Hao Wang, Takeo Kawabata, Y. Yamada, E. Takeshita, P. Zhou, Meng Wang, K. Okada, Meiko Kurokawa, Xi-Guang Cao, Hiroyoshi Sakurai, Naohito Iwasa, Yosuke Kondo, R. Shioda, T. Motobayashi, J. G. Chen, S. Kanno, ZG Hu, H. Kimura, Kenichiro Yoneda, Yu-Gang Ma, Y. Hara, D. Q. Fang, Shuichi Ota, K. Yamada, A. Ozawa, Hidetada Baba, Y. Fu, Susumu Shimoura, X. Z. Cai, Y. Yasuda, J. S. Wang, and Satoshi Takeuchi
Subjects: Physics, Nuclear and High Energy Physics, Decay scheme, Proton, Cyclotron, Hadron, General Physics and Astronomy, Rest frame, law.invention, Nuclear physics, Beamline, law, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Excited state, Atomic physics, Nucleon
Abstract: Experiments of 23 Al and 22 Mg radioactive beams bombarding a 12 C target at an energy of 60 ~70 A MeV have been performed at the projectile fragment separator beamline (RIPS) in the RIKEN Ring Cyclotron Facility to study the two-proton emission from 23 Al and 22 Mg excited states, respectively. The trajectorie of the decay products, namely 21 Na + p + p from 23 Al and 20 Ne + p + p from 22 Mg , are clean identified. The relative momentum and opening angle between two protons in the rest frame of three body decay channels are obtained by relativistic-kinematics reconstruction. The results demonstrate that there are some di-proton emission components from 2 He cluster for the excited 23 Al and 22 Mg .
Published: 2010

15. The SCRIT Electron Scattering Facility Project at the RIKEN RI Beam Factory

Author: M. Watanabe, T. Fujita, Kazuyoshi Kurita, Mitsuki Hori, Toshimi Suda, Kousuke Adachi, Masanori Wakasugi, S. Ichikawa, Tetsuya Ohnishi, Tadaaki Tamae, Mamoru Togasaki, A. Enokizono, Toshitada Hori, K. Yamada, N. Uchida, M. Hara, and Kyo Tsukada
Subjects: Physics, Nuclear physics, General Physics and Astronomy, Factory (object-oriented programming), Electron scattering, Beam (structure)
Published: 2018

16. STUDY OF LOW-LYING STATES IN 32Mg

Author: Takahiro Fukui, T. Minemura, D. Suzuki, Kazuo Ieki, T. Okumura, Nori Aoi, Yasuhiro Togano, E. Takeshita, Takashi Nakamura, Susumu Shimoura, T. K. Onishi, R. Sugou, M. K. Suzuki, M. Tamaki, K. Yamada, Kazuyoshi Kurita, Hironori Iwasaki, Satoshi Takeuchi, S. Kanno, Nobuaki Imai, T. Nakabayashi, Hidetada Baba, T. Kubo, Y. Hashimoto, Yosuke Kondo, Kanenobu Tanaka, Shinsuke Ota, Hiroyoshi Sakurai, T. Motobayashi, and Hiroshi Suzuki
Subjects: Physics, Nuclear and High Energy Physics, Spins, General Physics and Astronomy, Parity (physics), Inelastic scattering, Coincidence, Nuclear physics, Angular distribution, medicine.anatomical_structure, Excited state, medicine, Atomic physics, Nuclear Experiment, Nucleon, Nucleus
Abstract: Proton inelastic scattering on the neutron-rich nucleus 32 Mg has been experimentally studied at E lab = 46.5 MeV / nucleon in inverse kinematics. The energies of excited states in 32 Mg were obtained by measuring de-excitation γ rays. Several new states were identified by γ-γ coincidence analysis. Their spins and parities were restricted and the deformation parameters βp,p′ were extracted from the measured angular distribution of the proton inelastic scattering. The present analysis favors 4+ for the spin and parity of the 2321-keV state.
Published: 2009

17. ELECTRON SCATTERING OFF SHORT-LIVED RADIOACTIVE NUCLEI

Author: A. Kuwajima, Kazuyoshi Kurita, Y. Yano, K. Ishii, Masanori Wakasugi, Tsuyoshi Ohnishi, M. Nakamura, T. Masuda, Takashi Emoto, Shuo Wang, Toshimi Suda, T. Koseki, A. Morikawa, Akira Noda, Y. Furukawa, T. Shirai, S. Ito, Tadaaki Tamae, Hiromu Tongu, and H. Takeda
Subjects: Physics, Nuclear and High Energy Physics, Luminosity (scattering theory), General Physics and Astronomy, Electron, Ion trapping, Ion, Nuclear physics, Angular distribution, medicine.anatomical_structure, medicine, Atomic physics, Nucleus, Electron scattering, Beam (structure)
Abstract: We have established a novel method which make electron scattering off short-lived radioactive nuclei come into being. This novel method was named SCRIT (Self-Confining RI ion Target). It was based on the well known "ion trapping" phenomenon in electron storage rings. Stable nucleus, 133 Cs , was used as target nucleus in the R&D experiment. The luminosity of interaction between stored electrons and Cs ions was about 1.02(0.06) × 1026 cm -2 s -1 at beam current around 80 mA. The angular distribution of elastically scattered electrons from trapped Cs ions was measured. And an online luminosity monitor was used to monitor the change of luminosity during the experiment.
Published: 2009

18. Dilepton mass spectra in p+p collisions at s=200 GeV and the contribution from open charm

Author: K. S. Joo, K. N. Barish, Hiroaki Ohnishi, T. Ichihara, J. Chiba, Matthew G. Reuter, M. L. Brooks, Takahiro Fusayasu, Tadaaki Isobe, A. Deshpande, A. P.T. Palounek, Alexander Malakhov, L. Tomášek, Takao Sakaguchi, D. Sharma, D. Silvermyr, P. L. McGaughey, Xingguo Li, C. Klein-Boesing, L. S. Zolin, W. J. Park, X. He, O. O. Omiwade, M. Chiu, V. S. Pantuev, P. D. Barnes, A. Yanovich, V. Peresedov, Tae-Yeon Lee, A. V. Kazantsev, Martin Purschke, A. D. Frawley, T. Tabaru, P. Mikeš, Herve Borel, D. Lynch, T. C. Awes, Kyoichiro Ozawa, T. Liška, Jun Kikuchi, Christophe Pierre Suire, Alexander Milov, J. Gosset, S. P. Sorensen, Dylan Walker, S. Batsouli, H. Masui, A. K. Dubey, D. Kotchetkov, J. G. Lajoie, S. H. Aronson, W. Holzmann, Saskia Mioduszewski, Junji Tojo, S. N. White, I. Younus, T. Hachiya, Y. L. Yamaguchi, B. Komkov, A. A. Bickley, B. Love, I. J. Choi, Minghui Liu, A. Kravitz, Youngil Kwon, C. Silvestre, A. Morreale, R. A. Soltz, Alexei Khanzadeev, Kenneth Francis Read, Z. Fraenkel, M. Gonin, K. Okada, V. L. Rykov, T. Dahms, A. G. Litvinenko, Norio Saito, A. Soldatov, M. A. L. Leite, J. Velkoška, D. Kawall, Marisilvia Donadelli, V. Bumazhnov, H. Pereira, Andry Malala Rakotozafindrabe, B. Sahlmueller, B. Azmoun, A. Král, M. J. Kweon, M. Rosati, K. Das, H. En'yo, K. Tanida, M. J. Leitch, Hiroyuki Okada, M. Grosse Perdekamp, E. P. Hartouni, Maya Hachiya Shimomura, Y. I. Makdisi, J. Jin, O. Zaudtke, M. Ouchida, M. Issah, H. A. Gustafsson, M. Mitrovski, E. Stenlund, A. A. Vinogradov, V. I. Kochetkov, H. Sakata, A. Kozlov, I. Nakagawa, J. Asai, C. Zhang, M. Virius, E. M. Takagui, Eva Haslum, R. S. Towell, O. Drapier, Frank Ellinghaus, B. Lenzi, M. D. Malik, M. Oka, E. Vznuzdaev, I. Garishvili, Akio Kiyomichi, J. Murata, E. R. Kinney, R. Seto, K. Haruna, S. Yokkaichi, M. J. Tannenbaum, D. P. Morrison, S. Campbell, A. Dion, Jiangyong Jia, Y. Goto, Jan Rak, V. Babintsev, V. E. Semenov, T. A. Shibata, N. N. Ajitanand, M. Wysocki, Viktor Riabov, Shingo Sakai, Atsushi Taketani, A. Enokizono, J. Zimányi, Tatsuya Chujo, N. Kurihara, A. Glenn, R. Lacey, R. Granier de Cassagnac, Gerd Joachim Kunde, I. Shein, D. Mukhopadhyay, S. Rembeczki, G. S. Kyle, A. Hadj Henni, Rushan Han, A. Adare, S. Afanasiev, A. Ster, James Alexander, I. Tserruya, S. Butsyk, Yu. Efremenko, V. Singh, C. Y. Chi, Vladimir Samsonov, K. Boyle, Robert F. Hobbs, Wei Xie, D. Winter, M. P. Comets, J. G. Boissevain, Masashi Kaneta, D. Yu Peressounko, M. K. Lee, C. L. Woody, Takahiro Nakamura, R. Averbeck, Byung-Sik Hong, P. Tarján, Debashish Pal, D. Hornback, M. Heffner, A. Bazilevsky, S. Sawada, C. P. Singh, Alberto Baldisseri, B. M. Johnson, K. Dehmelt, Jen-Chieh Peng, Susumu Oda, J. Ying, A. Franz, A. Durum, A. Taranenko, Kazushi Miki, Philippe Rosnet, C. Pinkenburg, Tamas Ferenc Csorgo, J. L. Nagle, Alexandre Lebedev, D. Isenhower, A. Toia, Dong Jo Kim, Osamu Jinnouchi, O. Dietzsch, E. T. Atomssa, H. Valle, D. M. Lee, A. Isupov, J. Sziklai, Senta Greene, S. F. Pate, M. Stepanov, G. Roche, L. Mašek, Y. J. Mao, T. V. Moukhanova, S. Kametani, I. V. Sourikova, Brian Cole, Anne Marie Sickles, D. E. Fields, B. V. Jacak, B. E. Norman, H. Al-Bataineh, M. Naglis, E. O'Brien, X. R. Wang, J. H. Kang, M. McCumber, E. H. Kim, J. S. Haggerty, S. Esumi, A. Romana, C. L. Silva, I. Ravinovich, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, Masayasu Ishihara, V. Papavassiliou, Sébastien Gadrat, Y. Nagata, Susumu Sato, Sergey Fokin, G. R. Young, T. L. Thomas, L. Aphecetche, T. Horaguchi, Ryugo S. Hayano, Y. Riabov, Y. S. Lai, Kenta Shigaki, K. S. Sim, M. Nguyen, V. Dzhordzhadze, Y. Watanabe, A. S. Nyanin, R. Bennett, J. L. Charvet, H. Hiejima, M. Finger, Y. Fukao, A. Shevel, T. Hester, T. E. Miller, Johannes Peter Wessels, V-N. Tram, F. Matathias, Kensuke Homma, Motoi Inaba, Mate Csanad, P. Chung, P. Constantin, S. Chernichenko, David D'Enterria, M. N. Wagner, W. S. Emam, B. Bassalleck, M. Konno, J. T. Mitchell, R. Seidl, Vladislav Manko, H. Kanou, Taku Gunji, H. Gong, M. Slunečka, J. Seele, F. Kajihara, S. Belikov, H. Delagrange, S. Zhou, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, Y. Nakamiya, G. Baksay, K. O. Eyser, A. K. Purwar, K. Fujiwara, K. Imai, C. A. Ogilvie, T. K. Hemmick, Yasuo Miake, H. W. Van Hecke, L. Kochenda, J. Egdemir, Jason Kamin, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, A. Churyn, S. Bathe, D. Jouan, R. Pak, Agneta Oskarsson, N. Kamihara, R. Armendariz, Kazuyoshi Kurita, A. Drees, J. Kubart, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, A. Kiss, Z. Yasin, Henner Buesching, Steven E. Skutnik, Marcus Hohlmann, H. Qu, Hideki Hamagaki, K. Aoki, G. David, N. Grau, K. Shoji, P. W. Stankus, C. R. Cleven, C. Haegemann, Y. Inoue, R. Vértesi, Dong-Hun Kim, Jason Newby, J. E. Frantz, E. J. Desmond, Charles Maguire, M. Togawa, J. Park, Y. Tsuchimoto, I. E. Yushmanov, E. Kistenev, H. Harada, M. B. Deaton, Y. Tanaka, F. Staley, L. Baksay, H. Pei, K. Nakano, W. E. Sondheim, P. A. Rukoyatkin, John Hill, H. A. Torii, Toru Sugitate, L. D. Isenhower, François Fleuret, and S. Takagi
Subjects: Quantum chromodynamics, Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, 01 natural sciences, Nuclear physics, Yield (chemistry), 0103 physical sciences, Mass spectrum, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, 010306 general physics, Lepton
Abstract: PHENIX has measured the electron-positron pair mass spectrum from 0 to 8 GeV/c(2) in p + p collisions at root s = 200 GeV. The contributions from light meson decays to e(+)e(-) pairs have been determined based on measurements of hadron production cross sections by PHENIX. Within the systematic uncertainty of similar to 20% they account for all e(+)e(-) pairs in the mass region below similar to 1 GeV/c(2). The e(+)e(-) pair yield remaining after subtracting these contributions is dominated by semileptonic decays of charmed hadrons correlated through flavor conservation. Using the spectral shape predicted by PYTHIA, we estimate the charm production cross section to be 544 +/- 39(stat) +/- 142(syst) +/- 200(model) pb. which is consistent with QCD calculations and measurements of single leptons by PHENIX. (C) 2008 Elsevier BV. All rights reserved.
Published: 2009

19. Low-lying proton intruder state in 13B

Author: A. Saito, N. Aoi, H. Iwasaki, T. Murakami, K. Yamada, Yoshiyuki Yanagisawa, K. Demichi, Hiroyoshi Sakurai, Meiko Kurokawa, Eiji Ideguchi, Susumu Shimoura, Takashi Teranishi, Naohito Iwasa, Kazuyoshi Kurita, K. L. Yurkewicz, M. Tamaki, T. Gomi, M. Ishihara, Satoshi Takeuchi, Shinsuke Ota, Atsuko Odahara, Z. Elekes, Tohru Motobayashi, Shin'ichiro Michimasa, S. Kanno, T. Fukuchi, H. Hasegawa, T. Minemura, Hidetada Baba, Masahiro Notani, Shigeru Kubono, Y. Matsuyama, and E. Takeshita
Subjects: Scattering cross-section, Physics, Nuclear and High Energy Physics, Proton, Nuclear Theory, FOS: Physical sciences, Parity (physics), Intruder state, medicine.anatomical_structure, Excited state, medicine, Neutron, Nuclear Experiment (nucl-ex), Atomic physics, Nuclear Experiment, Nucleus
Abstract: The neturon rich nucleus 13B was studied via the proton transfer reaction 4He(12Be,13B \gamma) at 50AMeV. The known 4.83-MeV excited state was strongly populated and its spin and parity were assigned to 1/2+ by comparing the angular differential cross section data with DWBA calculations. This low-lying 1/2+ state is interpreted as a proton intruder state and indicates a deformation of the nucleus., Comment: 16 pages, 3 figures
Published: 2008

20. Shape transition observed in neutron-rich pf-shell isotopes studied via proton inelastic scattering

Author: T. Minemura, S. Kanno, Hironori Iwasaki, Kanenobu Tanaka, Shinsuke Ota, Takahiro Fukui, Hiroyoshi Sakurai, K. Yamada, M. Tamaki, T. Motobayashi, Satoshi Takeuchi, Megumi Niikura, Y. Hashimoto, R. Sugo, D. Suzuki, Hidetada Baba, Kazuo Ieki, T. Nakabayashi, T. Okumura, M. K. Suzuki, Eiji Ideguchi, Nori Aoi, Yasuhiro Togano, Kazuyoshi Kurita, E. Takeshita, T. Kubo, Hooi Jin Ong, Takashi Nakamura, Nobuaki Imai, Susumu Shimoura, Yosuke Kondo, K. Kusaka, Tsuyoshi Ohnishi, S. Bishop, Hiroshi Suzuki, and Taro Nakao
Subjects: Physics, Nuclear and High Energy Physics, Proton, Isotope, Excited state, Nuclear Theory, Quadrupole, Shell (structure), Neutron, Inelastic scattering, Atomic physics, Excitation
Abstract: The structure of the neutron rich pf-shell nuclei 58Ti36, 60Cr36 and 62Cr38 was studied by proton inelastic scattering in inverse kinematics. Large quadrupole deformation lengths of 1.12(16) fm and 1.36(14) fm were obtained for 60Cr and 62Cr, respectively, which confirm the enhanced collectivity in these nuclei. An excited state was observed in 62Cr at 1180(10) keV with tentative assignment of J π = 4 + . The increase in the E x ( 4 + ) / E x ( 2 + ) ratio indicates that the nature of collectivity changes from vibrational to rotational in 62Cr and affords evidence for the development of static deformation. The excitation energy of the newly observed 2+ state in 58Ti (1046(17) keV) shows hindered collectivity. The contrast between the structures of Cr and Ti suggests that the contributions of both protons and neutrons are crucial for the large collectivity in Cr close to N = 40 . From the comparison to shell model calculations, the large collectivity is found to originate from the admixture of the pf- and gd-shells across the N = 40 sub-shell gap.
Published: 2008

21. Study of N=20 shell gap with 1H(28Ne,27,28Ne) reactions

Author: J. Gibelin, Z. Elekes, A. Saito, Shinsuke Ota, Hiroyoshi Sakurai, T. Kishida, Tsuyoshi Ohnishi, Hooi Jin Ong, K. Yoneda, H. K. Sakai, S. Kawai, H. Hasegawa, Satoshi Takeuchi, Susumu Shimoura, Hidetada Baba, Y. Matsuyama, N. Imai, M. Ishihara, N. Aoi, E. Takeshita, Yoshiyuki Yanagisawa, Zs. Fülöp, Tohru Motobayashi, K. Demichi, K. Yamada, Yasuhiro Togano, A. Ozawa, S. Kanno, M. Tamaki, Shin'ichiro Michimasa, T. Gomi, Masahiro Notani, Zs. Dombrádi, Kazuyoshi Kurita, T. Kubo, T. Minemura, and H. Iwasaki
Subjects: Physics, Cross section (physics), Excited state, Quadrupole, Stochastic matrix, Shell (structure), General Physics and Astronomy, General Materials Science, Neutron, Physical and Theoretical Chemistry, Atomic physics, Liquid hydrogen, Excitation
Abstract: This paper reports on the 1H(28Ne,28Ne) and 1H(28Ne,27Ne) reactions studied at intermediate energy using a liquid hydrogen target. From the cross section populating the first 2+ excited state of 28Ne, and using the previously determined B(E2) value, the neutron quadrupole transition matrix element has been calculated to be Mn=13.8 ±3.7 fm2. In the neutron knock-out reaction, two low-lying excited states were populated in 27Ne. Only one of them can be interpreted by the sd shell model while the additional state may intrude from the fp shell. These experimental observations are consistent with the presence of fp shell configurations at low excitation energy in 27,28Ne nuclei caused by a vanishing N=20 shell gap at Z=10.
Published: 2007

22. Lifetime of the isomeric 02+ state in 12Be

Author: Y. Matsuyama, Shin'ichiro Michimasa, A. Saito, Atsuko Odahara, T. Gomi, Shigeru Kubono, Naohito Iwasa, Satoshi Takeuchi, Susumu Shimoura, T. Murakami, Eiji Ideguchi, Z. Elekes, N. Aoi, Yoshiyuki Yanagisawa, K. Demichi, Ikuko Hamamoto, Kazuyoshi Kurita, Shinsuke Ota, K. Yamada, Hiroyoshi Sakurai, H. Iwasaki, K. Miller, M. Tamaki, Meiko Kurokawa, E. Takeshita, T. Fukuchi, Masahiro Notani, T. Minemura, Hidetada Baba, Takashi Teranishi, S. Kanno, M. Ishihara, Tohru Motobayashi, and K. Hasegawa
Subjects: Physics, Nuclear and High Energy Physics, Branching fraction, Gamma ray, Atomic physics, Ground state, Projectile fragmentation, Spectral line, Positron annihilation
Abstract: Mean lifetime tau of the isomeric O-2(+) state in Be-12 has been determined by measuring decay spectra of delayed y-rays from stopped Be-12 2 nuclei produced by the projectile fragmentation of O-18 at 100 A MeV. A consistent value of tau = 331 +/- 12 ns was obtained from the time spectra of the E2 gamma decay to the 2(1)(+) state and the positron annihilation following the E0 decay to the ground state. Based on the observed branching ratio between the E2 and E0 decays, transition strengths of the two decay modes were deduced to be B(E2; O-2(+) -> 2(1)(+)) = 7.0 +/- 0.6 e(2) fm(4) and 2 1 1 (O-2(+) Sigma(i) e(i) r(i)(2) O-1(+)), = 0.87 +/- 0.03 e fM(2), respectively. (C) 2007 Elsevier B.V. All rights reserved.
Published: 2007

23. Correlated production of p and p¯ in Au+Au collisions at sNN=200 GeV

Author: J. Chiba, M. B. Deaton, R. A. Soltz, H. Borel, M. Grosse Perdekamp, Y. Tanaka, T. K. Shea, G. C. Mishra, Takao Sakaguchi, S. Bathe, Agneta Oskarsson, B. Love, Marie Germain, J. L. Charvet, C. R. Cleven, C. Haegemann, Y. Inoue, C. Klein-Boesing, A. D. Frawley, Y. Berdnikov, Y. Akiba, S. Afanasiev, A. Ster, I. Tserruya, A. G. Litvinenko, P. J. Kroon, T. Tabaru, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, J. Newby, G. Roche, T. E. Miller, E. T. Atomssa, S. Esumi, Yu. Efremenko, V. Singh, Dong-Hun Kim, S. H. Aronson, L. Baksay, Vaclav Vrba, Klaus Johannes Reygers, Charles Maguire, P. Chung, Robert F. Hobbs, T. Hester, W. A. Zajc, V. Baublis, M. Issah, Debashish Pal, S. Sawada, A. Kozlov, W. Holzmann, J. Ying, A. Franz, S. Leckey, Josh Moss, E. Kistenev, D. Hornback, M. Heffner, A. Denisov, S. Belikov, K. S. Joo, V. Cianciolo, R. Seto, K. Haruna, M. Mitrovski, Y. L. Yamaguchi, Tadaaki Isobe, Maya Hachiya Shimomura, Y. I. Makdisi, A. Taranenko, Kazushi Miki, M. Wysocki, Sergey Fokin, M. Holmes, M. D. Malik, E. Vznuzdaev, D. Winter, M. P. Comets, D. Yu Peressounko, V. Dzhordzhadze, Hirohiko Sato, Alexei Khanzadeev, H. Harada, H. Pei, J. S. Chai, T. Horaguchi, N. Grau, K. Shoji, A. Kiss, E. Stenlund, J. L. Drachenberg, S. F. Pate, W. S. Emam, P. L. McGaughey, P. Tarján, J. M. Burward-Hoy, B. Komkov, Norio Saito, M. A. L. Leite, S. Batsouli, X. He, Y. Nakamiya, S. K. Tuli, O. O. Omiwade, K. Dehmelt, P. W. Stankus, M. J. Tannenbaum, Marisilvia Donadelli, V. Bumazhnov, Z. Yasin, Henner Buesching, H. Sakata, L. Aphecetche, H. Al-Bataineh, V. Papavassiliou, J. Egdemir, M. Chiu, T. A. Shibata, S. P. Sorensen, V. Peresedov, Y. Le Bornec, K. Hasuko, Steven E. Skutnik, Jason Kamin, M. C. McCain, G. Baksay, V-N. Tram, S. Kelly, N. N. Ajitanand, Dylan Walker, W. C. Smith, Marcus Hohlmann, Andry Malala Rakotozafindrabe, Senta Greene, D. Isenhower, D. Mukhopadhyay, S. Rembeczki, D. Sharma, Jen-Chieh Peng, K. Das, B. Forestier, Jan Rak, Hiroyuki Okada, V. Babintsev, A. P.T. Palounek, S. P. Stoll, A. Toia, L. Mašek, M. T. Bjorndal, Johannes Peter Wessels, B. E. Norman, Minghui Liu, D. Bucher, E. P. Hartouni, H. Masui, A. K. Dubey, Joakim Nystrand, G. S. Kyle, Tae-Yeon Lee, Eva Haslum, B. Lenzi, Martin Purschke, F. Gastineau, H. Qu, R. Granier de Cassagnac, M. K. Lee, Takahiro Nakamura, A. Adare, P. Rosnet, Kenneth Francis Read, Xiong Wang, A. A. Bickley, K. O. Eyser, S. S.E. Rosendahl, G. Bunce, K. Fujiwara, H. A. Gustafsson, Susumu Oda, D. Kotchetkov, T. Shohjoh, H. Kanou, Taku Gunji, H. Gong, L. Tomášek, A. Hadj Henni, A. V. Kazantsev, S. Takagi, Hideki Hamagaki, K. Aoki, G. David, T. V. Moukhanova, C. Zhang, J. Seele, James Alexander, R. Averbeck, Byung-Sik Hong, A. Durum, V. S. Pantuev, A. Bazilevsky, K. N. Barish, F. Kajihara, F. Matathias, Dong Jo Kim, A. Morreale, Osamu Jinnouchi, A. Churyn, Z. Fraenkel, P. Mikeš, Kensuke Homma, E. O'Brien, Catherine Micaela Silvestre, D. S. Brown, Motoi Inaba, J. G. Lajoie, T. Hachiya, H. Delagrange, K. Boyle, D. Jouan, Wei Xie, Yoichiro Fukao, M. Harvey, Roy A. Lacey, R. Vértesi, B. Azmoun, A. Král, M. J. Kweon, S. Chernichenko, H. Lim, Alexandre Lebedev, Viktor Riabov, T. C. Awes, D. M. Lee, B. Bassalleck, Anne Marie Sickles, Junji Tojo, D. E. Fields, S. Zhou, Kyoichiro Ozawa, T. Liška, Mate Csanad, Rushan Han, M. N. Hagiwara, Jun Kikuchi, M. Konno, B. V. Jacak, H. W. Van Hecke, C. A. Ogilvie, M. L. Brooks, I. J. Choi, A. Baldisseri, J. T. Mitchell, A. Kravitz, M. McCumber, A. K. Purwar, K. Okada, M. Oka, Hiroaki Ohnishi, Y. S. Kim, A. Dion, R. Seidl, S. Butsyk, Vladislav Manko, Christophe Pierre Suire, Alexander Milov, T. K. Hemmick, I. Nakagawa, M. Slunečka, Yasuo Miake, Vladimir Samsonov, Atsushi Taketani, A. Enokizono, I. Otterlund, B. Sahlmueller, E. H. Kim, H. En'yo, P. Constantin, M. J. Leitch, O. Drapier, Frank Ellinghaus, G. R. Young, E. R. Kinney, D. P. Morrison, L. Kochenda, N. Willis, C. Vale, T. Kawagishi, S. Campbell, B. S. Chang, Christine Angela Aidala, J. Klay, V. E. Semenov, J. Zimányi, R. Pak, Tamas Ferenc Csorgo, K. S. Sim, J. L. Nagle, Tatsuya Chujo, N. Kamihara, Y. Kwon, R. Armendariz, Xingguo Li, M. Gonin, H. Hiejima, Kazuyoshi Kurita, E. J. Desmond, T. L. Thomas, David D'Enterria, K. Imai, A. Drees, Xiao-yan Li, J. Kubart, H. Pereira, M. Togawa, J. Park, Florian Bauer, Ryugo S. Hayano, R. P. Pisani, Y. Riabov, Y. Tsuchimoto, Kenta Shigaki, M. Nguyen, I. E. Yushmanov, Nikolay Tyurin, A. S. Nyanin, M. N. Wagner, J. E. Frantz, M. Ouchida, J. Asai, Shingo Sakai, C. L. Woody, A. Shevel, D. Lynch, I. V. Sourikova, A. Glenn, V. L. Rykov, T. Dahms, I. Ravinovich, Y. Nagata, A. Deshpande, Y. Watanabe, S. S. Ryu, T. Ichihara, I. Younus, Matthew G. Reuter, A. Soldatov, D. Kawall, K. Tanida, V. I. Kochetkov, Takahiro Fusayasu, J. Murata, R. Bennett, Gerd Joachim Kunde, I. Shein, C. P. Singh, B. M. Johnson, I. D. Ojha, Alexander Malakhov, A. Isupov, Ahmed Al-Jamel, M. Finger, J. Sziklai, D. Silvermyr, Brian Cole, M. Naglis, L. S. Zolin, C. L. Silva, Saskia Mioduszewski, W. J. Park, Masayasu Ishihara, O. Zaudtke, Susumu Sato, F. Staley, M. Virius, P. D. Barnes, A. Yanovich, J. Jin, E. M. Takagui, R. S. Towell, S. Y. Fung, I. Garishvili, Akio Kiyomichi, N. Kurihara, Y. Cobigo, M. G. Hur, C. Y. Chi, John Hill, H. A. Torii, Toru Sugitate, L. D. Isenhower, François Fleuret, S. N. White, K. Nakano, W. E. Sondheim, O. Dietzsch, H. Valle, Y. J. Mao, S. Kametani, P. A. Rukoyatkin, J. H. Kang, Julia Velkovska, J. S. Haggerty, A. Romana, M. Rosati, S. Gadrat, Bruno Espagnon, A. A. Vinogradov, Henrik Tydesjö, Jiangyong Jia, Y. S. Lai, Y. Goto, J. Gosset, J. P. Sullivan, S. Yokkaichi, J. M. Heuser, J. G. Boissevain, Masashi Kaneta, C. Pinkenburg, and M. Stepanov
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Meson, 010308 nuclear & particles physics, Nuclear Theory, High Energy Physics::Phenomenology, Parton, 01 natural sciences, Nuclear physics, Baryon, 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, 010306 general physics, Sign (mathematics), Bar (unit)
Abstract: Correlations between p and (p) over bar at transverse momenta typical of enhanced baryon production in Au + Au collisions are reported. The PHENIX experiment has measured same and opposite sign baryon pairs in Au + Au collisions at root s(NN) = 200 GeV. Correlated production of p and p with the trigger particle from the range 2.5 < p(T) < 4.0 GeV/c and the associated particle with 1.8 < p(T) < 2.5 GeV/c is observed to be nearly independent of the centrality of the collisions. Same sign pairs show no correlation at any centrality. The conditional yield of mesons triggered by baryons (and anti-baryons) and mesons in the same p(T) range rises with increasing centrality, except for the most central collisions, where baryons show a significantly smaller number of associated mesons. These data are consistent with a picture in which hard scattered partons produce correlated p and (p) over bar in the p(T) region of the baryon excess. (c) 2007 Elsevier B.V. All rights reserved.
Published: 2007

24. Proton Inelastic Scattering on Island-of-Inversion Nuclei

Author: Naohito Iwasa, Shin'ichiro Michimasa, Meiko Kurokawa, Nori Aoi, Tomohiro Machida, M. Shinohara, T. K. Onishi, T. Nakabayashi, Hiroyoshi Sakurai, Tohru Motobayashi, Kiyohiko Inafuku, Satoshi Takeuchi, Kenichiro Yoneda, Yoshiyuki Yanagisawa, Kazuyoshi Kurita, Kanenobu Tanaka, Takashi Nakamura, Yasuhiro Togano, Hooi Jin Ong, Masahiro Notani, Hideaki Otsu, Yuichi Ichikawa, Z. Elekes, Mitsutaka Yamaguchi, Toshiyuki Sumikama, K. Yamada, and Zsolt Fülöp
Subjects: Nuclear physics, Physics, Quasielastic scattering, Proton, Island of inversion, Scattering, Quasielastic neutron scattering, Inelastic scattering, Mott scattering, Nucleon
Published: 2015

25. SCRIT Electron Scattering Facility — Present Status and Physics Program

Author: Tetsuya Ohnishi, Kyo Tsukada, Shunpei Yoneyama, Teruaki Tsuru, S. Ichikawa, Toshimi Suda, Saki Matsuo, Masanori Wakasugi, Kazuyoshi Kurita, Shuo Wang, Akitomo Enozokizono, Yuji Haraguchi, Tadaaki Tamae, Mamoru Togasaki, and Masahiro Hara
Subjects: Nuclear physics, Physics, Center (algebra and category theory), Space Science, Electron scattering
Abstract: Toshimi Suda1 , Akitomo Enozokizono2, Masahiro Hara3, Yuji Haraguchi4, Sin’ichi Ichikawa3, Kazuyoshi Kurita2, Saki Matsuo2, Tetsuya Ohnishi3, Tadaaki Tamae1, Mamoru Togasaki2, Kyo Tsukada1,Teruaki Tsuru1, Shuo Wang5, Shunpei Yoneyama1 and Masanori Wakasugi3 1Research Center for Electron-Photon Science, Tohoku University, 1-2-1 Mikamine, Sendai, 981-0928, Japan 2Department of Physics, Rikkyo University, Ikebukuro, Tokyo, 171-8501, Japan 3Nishina Center, RIKEN, Wako, Saitama,351-0198, Japan 4Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2137, Japan 5School of Space Science and Physics, Shandong University, Weihai, China
Published: 2015

26. Evolution of the N = 20 shell gap

Author: J. Gibelin, Susumu Shimoura, H. Iwasaki, K. Yoneda, Y. Matsuyama, N. Imai, H. K. Sakai, Zs. Fülöp, Yasuhiro Togano, Kazuyoshi Kurita, T. Kishida, M. Ishihara, Masahiro Notani, Hidetada Baba, Zs. Dombrádi, M. Tamaki, Tohru Motobayashi, Satoshi Takeuchi, A. Saito, S. Kanno, E. Takeshita, Yoshiyuki Yanagisawa, K. Demichi, A. Ozawa, Z. Elekes, Shin'ichiro Michimasa, K. Yamada, T. Gomi, T. Minemura, Shinsuke Ota, H. Hasegawa, N. Aoi, Hiroyoshi Sakurai, T. Kubo, S. Kawai, and Hooi Jin Ong
Subjects: Physics, History, Isotope, Nuclear Theory, Parity (physics), Inelastic scattering, Computer Science Applications, Education, Ion, Nuclear physics, Excited state, Neutron, Configuration space, Atomic physics, Nuclear Experiment, Excitation
Abstract: Stucture of N = 17,18 nuclei has been investigated via proton inelastic scattering and neutron removal reactions up to the neutron dripline in inverse kinematics by use of radioctive ion beams provided by the RIKEN isotope separator, RIPS. Low energy excited states have been found in all the 26,27F and 27Ne nuclei, which are out of the neutron sd shell configuration space and are considered as intruder states arisng from cross shell excitations. Monte-Carlo shell model calculations with the sdpf-m interaction predict low energy negative parity excited states from neutron cross shell excitation at N = 17,18, which is in agreement with our experimental results. Observation of intruder states even at N = 17, especially the p3/2 state in 27Ne at 765 keV is a clear indication of a vanishing N = 20 shell gap at Z = 8 as predicted by the sdpf-m shell model calculations.
Published: 2006

27. Proton single-particle states in the neutron-rich 23F nucleus

Author: Toshiyuki Minemura, M. Tamaki, Masahiro Notani, A. Saito, Nori Aoi, Atsumasa Yoshida, Hooi Jin Ong, Shigeru Kubono, Shin'ichiro Michimasa, S. Kanno, Yoshiyuki Yanagisawa, Kazuyoshi Kurita, Shinsuke Ota, Naohito Iwasa, Hironori Iwasaki, Satoshi Takeuchi, Hiroyoshi Sakurai, T. Motobayashi, Hidetada Baba, E. Takeshita, Susumu Shimoura, and Meiko Kurokawa
Subjects: Physics, Nuclear and High Energy Physics, education.field_of_study, Proton, Nuclear Theory, Population, Inelastic scattering, Atomic orbital, Excited state, Neutron, Atomic physics, Nuclear Experiment, education, Spectroscopy, Excitation, Nuclear Physics
Abstract: The proton shell structure in neutron-rich fluorine 23F was investigated using the in-beam γ-ray spectroscopy technique via the proton transfer reaction onto the 22O nucleus. We also measured the α inelastic scattering on 23F, the neutron knockout from 24F, and the two-nucleon knockout from 25Ne using a cocktail secondary beam. By comparison of the population strengths for excited states in these reactions, we deduced the character of the excited states. The levels and γ-decay scheme in 23F were proposed based on de-excitation γ-rays and the products of these reactions. We found that the 2268- and 4059-keV levels have strong proton single-particle nature of the s 1 / 2 and d 3 / 2 orbitals, respectively, by analysis of the population strengths and the angular distributions of the states. These single-particle states are located at higher excitation energies than the shell model predictions for the USD and SDPF-M interactions, which indicates that the centroid energy gaps for π d 5 / 2 – π s 1 / 2 and π d 5 / 2 – π d 3 / 2 are wider than predicted.
Published: 2006

28. Testing of the RIKEN-ATOMKI CsI(Tl) array in the study of 22, 23O nuclear structure

Author: G. Kalinka, Hiroyuki Takeda, Kazuyoshi Kurita, Zs. Dombrádi, A. A. Korsheninnikov, Yoshiyuki Yanagisawa, Meiko Kurokawa, Y. Hashimoto, H. Iwasaki, E. Yu. Nikolskii, T. Okumura, Y. Satou, A. Saito, Toshiyuki Sumikama, Yosuke Kondo, A. Perera, Shawn Bishop, Z. Elekes, Satoshi Takeuchi, Naohito Iwasa, Shinsuke Ota, Taro Nakao, Hiroyoshi Sakurai, Julien Gibelin, D. Suzuki, M. Suzuki, N. Matsui, N. Imai, Tomoko Gomi, Zs. Fülöp, Yasuhiro Togano, Takashi Nakamura, Tohru Motobayashi, Tsuyoshi Ohnishi, and Dóra Sohler
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Cross section (physics), Proton, Hadron, Detector, Nuclear structure, Nuclear fusion, Neutron, Ground state
Abstract: The paper reports on the test of the newly developed RIKEN-ATOMKI CsI(Tl) array. It is demonstrated that high-quality detectors with excellent light collection efficiency and narrow resolution distribution could be produced. The setup has been commissioned in the study of the reaction of 22O + CD2. In the present paper, we summarize the results mainly on the (d, d′) channel. From the cross section for the transition between the ground state and the first 2+ state, we could deduce the “matter” deformation parameter to be β M=0.23±0.02 by distorted wave analysis. Comparing this data with previous measurements it can be concluded that 22O isotope has moderate and similar neutron and proton deformations.
Published: 2006

29. Commissioning of RHIC pC CNI polarimeter

Author: Kazuyoshi Kurita
Subjects: Nuclear physics, Physics, Elastic scattering, Nuclear and High Energy Physics, High energy, Optics, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Polarimeter, General status, Nuclear Experiment, business, Polarization (waves)
Abstract: A new polarimeter has been developed using proton carbon elastic scattering in CNI region at RHIC. Polarization measurements were successfully carried out with the high energy polarized pp collision run in 2001/2002 winter. The experimental setup, performance, and the general status of the polarimeters are presented.
Published: 2003

30. Proton-carbon CNI polarimeter for RHIC

Author: Kazuyoshi Kurita
Subjects: Physics, Elastic scattering, Nuclear and High Energy Physics, Proton, Nuclear Theory, Astrophysics::Instrumentation and Methods for Astrophysics, Polarimetry, chemistry.chemical_element, Polarimeter, Atomic and Molecular Physics, and Optics, Nuclear physics, chemistry, High energy proton, Physics::Accelerator Physics, Nuclear Experiment, Carbon
Abstract: A new polarimeter has been developed using proton carbon elastic scattering in CNI region for high energy proton polarimetry at RHIC. The analyzing power of the reaction measured by AGS experiment 950 and the first polarized proton acceleration commissioning results are presented.
Published: 2002

31. Quadrupole collectivity in island-of-inversion nuclei28,30Neand34,36Mg

Author: Hiroyoshi Sakurai, Kenichiro Yoneda, Satoshi Takeuchi, Shin'ichiro Michimasa, Masahiro Notani, M. Shinohara, Hideaki Otsu, T. Machida, Kanenobu Tanaka, Kazuyoshi Kurita, Masatoshi Yamaguchi, Meiko Kurokawa, Hooi Jin Ong, Zs. Fülöp, Yasuhiro Togano, T. K. Onishi, K. Inafuku, K. Yamada, Takashi Nakamura, Tohru Motobayashi, T. Nakabayashi, Yoshiyuki Yanagisawa, Z. Elekes, Toshiyuki Sumikama, Yuichi Ichikawa, Naohito Iwasa, and Nori Aoi
Subjects: Physics, Nuclear and High Energy Physics, Neon, chemistry, Proton, Island of inversion, Quadrupole, chemistry.chemical_element, Inelastic scattering, Atomic physics, Spectroscopy
Abstract: The quadrupole collectivity of neutron-rich even-even neon and magnesium nuclei around $N=20$, ${}^{28,30}\mathrm{Ne}$, and ${}^{32,34,36}$Mg, was studied via proton inelastic scattering on a liquid hydrogen target by in-beam $\ensuremath{\gamma}$-ray spectroscopy in inverse kinematics. The angle-integrated cross sections for the first ${2}^{+}$ states of these nuclei were determined by measuring de-excitation $\ensuremath{\gamma}$ rays. The deformation lengths were extracted from the angle-integrated cross sections using distorted-wave calculations. The deformation length of ${}^{30}$Ne (${\ensuremath{\delta}}_{(p,{p}^{\ensuremath{'}})}=1.{59}_{\ensuremath{-}0.09}^{+0.08}$ fm) is smaller than that of ${}^{32}$Mg ($1.{83}_{\ensuremath{-}0.11}^{+0.10}$ fm), which exhibits the largest quadrupole collectivity among the neutron-rich $N=20$ isotones. Along the magnesium isotopic chain, the deformation lengths of ${}^{34}$Mg and ${}^{36}$Mg were deduced to be $2.{30}_{\ensuremath{-}0.10}^{+0.09}$ fm and $1.{90}_{\ensuremath{-}0.17}^{+0.16}$ fm, respectively. The evolution of quadrupole deformation in the vicinity of ${}^{32}$Mg is discussed by comparing the present results with the theoretical calculations.
Published: 2014

32. Intermediate-energy Coulomb excitation of the neutron-rich Ge isotopes around N = 50

Author: Z. Elekes, Hiroyoshi Sakurai, T. Fukuchi, Kazuyoshi Kurita, Hooi Jin Ong, Tohru Motobayashi, M. Tamaki, Megumi Niikura, Hiroshi Suzuki, S. Kanno, Yoshiyuki Yanagisawa, Susumu Shimoura, R. Kanungo, Satoshi Takeuchi, Yasuhiro Togano, E. Takeshita, T. Kubo, Masaru Suzuki, Shinsuke Ota, Hidetada Baba, Yuichi Ichikawa, Shin'ichiro Michimasa, T. K. Onishi, Akito Saito, H. Iwasaki, Masakazu Ishihara, Y. Satou, Nori Aoi, S. Kawai, and Naohito Iwasa
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Isotope, Intermediate energy, Hadron, Nuclear fusion, Neutron, Coulomb excitation, Atomic physics, Nuclear Experiment
Abstract: Structure of the neutron-rich Ge isotopes at and around N = 50 has been investigated via intermediate-energy Coulomb excitation using secondary beams of 78-82Ge incident on a Pb target. The B(E2) values for the low-lying 2+ states have been extracted and compared with the data for neighboring isotopes around N = 50. In addition, a new method of intermediate-energy two-step Coulomb excitation has been proposed as a spectroscopic tool to study the 4+ states in neutron-rich even-even nuclei. The first application of the method and its results are presented.
Published: 2005

33. Evaluation of radioactivity in the bodies of mice induced by neutron exposure from an epithermal neutron source of an accelerator-based boron neutron capture therapy system.

Author: Satoshi NAKAMURA, Shoji IMAMICHI, Kazuyoshi MASUMOTO, Masashi ITO, Akihisa WAKITA, Hiroyuki OKAMOTO, Shie NISHIOKA, Kotaro IIJIMA, Kazuma KOBAYASHI, Yoshihisa ABE, Hiroshi IGAKI, Kazuyoshi KURITA, Teiji NISHIO, Mitsuko MASUTANI, and Jun ITAMI
Published: 2017
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34. Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons inp+pcollisions ats=62.4 GeV

Author: C. L. Woody, A. Berdnikov, L. Tomáek, I. V. Sourikova, M. Ouchida, N. Means, J. Asai, Shingo Sakai, T. L. Thomas, Ryugo S. Hayano, S. P. Sorensen, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, Rachid Nouicer, Seong H. Kim, J. G. Lajoie, M. I. Nagy, M. Issah, Tae-Yeon Lee, Martin Purschke, I. J. Choi, A. Kravitz, M. D. Malik, E. Vznuzdaev, A. Morreale, Z. Fraenkel, A. Hadj Henni, S. Afanasiev, A. Ster, R. K. Choudhury, Mate Csanad, Beomkyu Kim, K. Boyle, Wei Xie, Takao Sakaguchi, C. Klein-Boesing, H. A. Gustafsson, A. D. Frawley, J. Newby, Minghui Liu, M. Heffner, Jen-Chieh Peng, S. Huang, C. Zhang, Kenneth Francis Read, J. T. Mitchell, W. Holzmann, Maya Hachiya Shimomura, L. Maek, H. Qu, David D'Enterria, D. Hornback, K. S. Joo, K. A. Drees, Xiong Wang, N. N. Ajitanand, Dong Jo Kim, R. Seidl, Y. I. Makdisi, M. Gonin, Vladislav Manko, Y. Ikeda, M. Slunečka, Tadaaki Isobe, A. Veicht, A. Taranenko, J. G. Boissevain, E. J. Mannel, S. Belikov, Vladimir Samsonov, S. Esumi, V. S. Pantuev, Hideki Hamagaki, K. Aoki, G. David, I. Tserruya, Yu. Efremenko, Viktor Riabov, Takahiro Nakamura, J. Jin, D. Sharma, R. Ichimiya, E. M. Takagui, V. Singh, C. Baumann, A. Sukhanov, S. Kametani, Kazushi Miki, M. J. Tannenbaum, H. Torii, P. L. McGaughey, B. Azmoun, A. Král, M. J. Kweon, Brajesh K. Singh, Laurent Bernard Aphecetche, Johannes Peter Wessels, Susumu Oda, H. Pereira, C. P. Singh, Y. Morino, Y. Fukao, B. M. Johnson, D. Mukhopadhyay, S. Rembeczki, C. Vale, B. S. Chang, K. O. Eyser, O. Dietzsch, A. K. Purwar, K. Fujiwara, K. Das, Tamas Ferenc Csorgo, E. T. Atomssa, C. Pinkenburg, E. P. Hartouni, M. Chiu, Herve Borel, Christine Angela Aidala, J. Klay, D. Lynch, R. A. Soltz, J. L. Nagle, M. Oka, H. Valle, A. Dion, K. Okada, Dipanwita Dutta, A. Durum, A. Isupov, E. J. Desmond, B. Sahlmueller, T. Hester, M. Stepanov, G. Roche, H. En'yo, M. J. Leitch, A. Yu. Semenov, J. Sziklai, K. Yamaura, S. Sawada, Atsushi Taketani, M. Grosse Perdekamp, A. Enokizono, P. Liebing, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, T. Engelmore, J. Ying, A. Franz, Brian Cole, Julia Velkovska, J. Gosset, C. Silvestre, F. Matathias, Kensuke Homma, R. S. Towell, M. Togawa, J. Park, Marisilvia Donadelli, V. Bumazhnov, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. Kawall, Eva Haslum, B. Lenzi, I. Garishvili, F. Wei, P. Constantin, D. P. Morrison, H. Iinuma, S. Chernichenko, A. P.T. Palounek, Andry Malala Rakotozafindrabe, S. Campbell, K. B. Lee, H. Themann, P. Mike, V-N. Tram, N. Grau, B. Bassalleck, V. E. Semenov, V. L. Rykov, T. Dahms, R. Tanabe, D. Layton, Y. Tsuchimoto, Tatsuya Chujo, H. W. Van Hecke, M. Konno, C. Y. Chi, C. A. Ogilvie, J. Murata, Motoi Inaba, S. Yokkaichi, S. Bathe, T. K. Hemmick, David Olle Rickard Silvermyr, M. Wysocki, G. S. Kyle, W. C. Chang, I. E. Yushmanov, A. V. Kazantsev, Gerd Joachim Kunde, Y. J. Mao, Agneta Oskarsson, T. Horaguchi, Yasuo Miake, James Alexander, C. M. Camacho, I. Shein, D. Roach, K. M. Kijima, Rushan Han, Y. Berdnikov, T. Kempel, Y. Akiba, Prashant Shukla, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, J. H. Kang, S. F. Pate, J. S. Haggerty, L. Kochenda, K. Sedgwick, D. Winter, M. Rosati, M. Mishra, S. Nagamiya, Philippe Rosnet, D. Yu Peressounko, H. Al-Bataineh, Dong-Hun Kim, Alberto Baldisseri, A. Deshpande, Alexandre Lebedev, R. Pak, Vaclav Vrba, Klaus Johannes Reygers, D. E. Fields, D. M. Lee, Xingguo Li, N. Kamihara, P. Tarján, B. V. Jacak, A. A. Vinogradov, T. C. Awes, Kyoichiro Ozawa, K. Kiriluk, Y. Watanabe, Y. L. Yamaguchi, V. Papavassiliou, Jiangyong Jia, Y. Goto, B. Komkov, Kazuyoshi Kurita, Jun Kikuchi, Y. S. Lai, I. Younus, A. Drees, Y. Nakamiya, M. McCumber, Norio Saito, A. Soldatov, K. Sakashita, Alexei Khanzadeev, G. Baksay, M. A. L. Leite, E. Stenlund, Jason Kamin, S. P. Stoll, A. Kiss, H. Liu, S. S.E. Rosendahl, G. Bunce, Henner Buesching, Senta Greene, J. S. Kapustinsky, M. Naglis, T. V. Moukhanova, C. L. Silva, K. Shoji, A. Churyn, R. Vértesi, Marcus Hohlmann, Masayasu Ishihara, D. Jouan, A. T. Basye, I. Ravinovich, V. Babintsev, E. H. Kim, J. E. Frantz, M. Bai, P. W. Stankus, B. Fadem, E. O'Brien, W. A. Zajc, R. Bennett, V. Baublis, M. Finger, S. Dairaku, O. Zaudtke, A. Denisov, V. Cianciolo, M. Virius, Y. Tomita, A. Glenn, Sergey Fokin, K. N. Barish, M. L. Brooks, X. He, V. Peresedov, J. L. Charvet, J. Koster, M. Kurosawa, P. Chung, T. Lika, J. Imrek, S. Batsouli, A. Datta, H. Masui, A. K. Dubey, A. A. Bickley, K. S. Sim, V. Dzhordzhadze, Y. Kwon, R. Yang, S. Taneja, K. Imai, Ajit Kumar Mohanty, Anne Marie Sickles, T. A. Shibata, T. Sato, B. Love, D. Isenhower, A. Toia, G. R. Young, A. G. Litvinenko, T. Niita, Y. Onuki, Jan Rak, R. Lacey, R. Granier de Cassagnac, A. Adare, A. Kozlov, R. Seto, K. Haruna, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Butsyk, S. Zhou, S. D. Rolnick, H. Pei, Y. Tanaka, F. Staley, L. Baksay, Charles Maguire, Kiyoshi Tanida, E. Kistenev, S. N. White, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, P. A. Rukoyatkin, B. Meredith, John Hill, P. Ruička, Toru Sugitate, François Fleuret, T. Ichihara, Takahiro Fusayasu, Alexander Malakhov, L. S. Zolin, W. J. Park, P. D. Barnes, and A. Yanovich
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, media_common.quotation_subject, High Energy Physics::Phenomenology, Hadron, Perturbative QCD, Polarization (waves), Deep inelastic scattering, 01 natural sciences, Helicity, Asymmetry, Gluon, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, media_common
Abstract: Unpolarized cross sections and double-helicity asymmetries of single-inclusive positive and negative charged hadrons at midrapidity from p + p collisions at root s = 62.4 GeV are presented. The PHENIX measurement of the cross sections for 1.0 < p(T) < 4.5 GeV/c are consistent with perturbative QCD calculations at next-to-leading order in the strong-coupling constant, alpha(s). Resummed pQCD calculations including terms with next-to-leading-log accuracy, yielding reduced theoretical uncertainties, also agree with the data. The double-helicity asymmetry, sensitive at leading order to the gluon polarization in a momentum-fraction range of 0.05 less than or similar to x(gluon) less than or similar to 0.2, is consistent with recent global parametrizations disfavoring large gluon polarization.
Published: 2012

35. Evolution ofπ0Suppression inAu+AuCollisions fromsNN=39to 200 GeV

Author: Atsushi Takahara, D. Kotov, Jason Kamin, S. P. Stoll, M. Stepanov, D. Jouan, L. Tomášek, Charles Maguire, K. A. Drees, S. Choi, X. He, Alexander Milov, S. Tarafdar, M. Rosati, T. Murakami, Kiyoshi Tanida, I. Ravinovich, L. Patel, I. Nakagawa, Young-Ki Kim, T. Engelmore, N. Novitzky, E. Kistenev, T. Ichihara, K. B. Lee, Alice Mignerey, J. Klatsky, Eva Haslum, L. D'Orazio, S. Miyasaka, Ryugo S. Hayano, Y. Riabov, T. C. Awes, Kyoichiro Ozawa, M. S. Daugherity, H. A. Gustafsson, T. Csörgő, O. Drapier, Takahiro Fusayasu, E. R. Kinney, C. P. Singh, Alexander Malakhov, Y. Miyachi, D. P. Morrison, Y. Aramaki, V. Peresedov, M. Bai, S. Campbell, Marisilvia Donadelli, V. Bumazhnov, Martin Purschke, B. H. Kang, J. Sun, Takao Sakaguchi, A. Sen, Kenta Shigaki, D. E. Fields, B. M. Johnson, Filip Krizek, E. C. Aschenauer, R. J. Petti, Robert Vertesi, B. V. Jacak, Y. Ikeda, Jiangyong Jia, Y. Goto, D. Silvermyr, A. Isupov, E. J. Mannel, H. Al-Ta'Ani, Tatsuya Chujo, L. S. Zolin, A. D. Frawley, A. S. Nyanin, S. Afanasiev, L. Ding, Rachid Nouicer, A. N. Zelenski, M. Proissl, A. Ster, S. Sawada, J. Ying, A. Franz, Y. Fukao, Y. Tanaka, G. Roche, J. Sziklai, V. S. Pantuev, M. Sano, Zhiying You, M. Gonin, M. Javani, S. Huang, D. Kleinjan, R. Reynolds, Brian Cole, M. McCumber, A. Dion, R. Akimoto, Senta Greene, M. I. Nagy, S. Masumoto, J. Koster, P. L. McGaughey, Jen-Chieh Peng, J. E. Frantz, A. Yanovich, M. Finger, S. Dairaku, Viktor Riabov, D. Roach, K. M. Kijima, Inkyu Park, D. Kawall, R. K. Choudhury, K. S. Joo, B. Fadem, C. Pinkenburg, E. O'Brien, M. Virius, E. T. Atomssa, C. L. Woody, A. Berdnikov, K. V. Dharmawardane, Xiong Wang, Dong Jo Kim, A. Taranenko, H. J. Moon, H. Pei, Maya Hachiya Shimomura, R. S. Hollis, Y. I. Makdisi, H. Themann, S. Baumgart, J. Murata, Gerd Joachim Kunde, Y. Nakamiya, Y. Tsuchimoto, M. Soumya, T. Horaguchi, Brajesh K. Singh, I. Shein, Tomoya Tsuji, M. Mendoza, O. Dietzsch, S. H. Lee, S. N. White, N. Apadula, H. J. Kim, C. H. Chen, H. Iinuma, T. Hester, E. M. Takagui, R. S. Towell, I. Tserruya, Yu. Efremenko, A. Vossen, A. Veicht, V. Singh, M. J. Tannenbaum, H. Torii, K. Hashimoto, C. Gal, J. Hanks, Sung Keun Park, N. N. Ajitanand, Takahiro Nakamura, I. Garishvili, F. Wei, A. Manion, Bum-Hoon Lee, M. Wysocki, B. Bannier, M. J. Leitch, Julia Velkovska, Zvi Hirsh Citron, K. Nakano, Minghui Liu, K. Sedgwick, A. Garishvili, D. McGlinchey, S. Esumi, Vladimir Samsonov, Christine Nattrass, S. Bathe, M. Chiu, Beomkyu Kim, T. Todoroki, D. Sharma, C. A. Ogilvie, Kisung Lee, T. K. Hemmick, J. M. Durham, E. Tennant, Yasuo Miake, Aaron Angerami, K. N. Barish, A. Durum, Y. Komatsu, Jongmin Lee, Kenneth Francis Read, Mihael Makek, A. Deshpande, K. B. Kim, F. Fleuret, Prashant Shukla, W. E. Sondheim, M. Issah, D. Ivanischev, S. F. Pate, I. V. Sourikova, A. Glenn, Eunja Kim, A. Sukhanov, S. Wolin, R. Pak, B. Azmoun, A. Král, H. Pereira, N. Grau, S. Yokkaichi, K. Okada, Ke. Nakamura, C. Y. Chi, W. A. Zajc, Byoungchoo Park, Kazuyoshi Kurita, M. Kasai, Y. J. Kwon, A. Drees, V. Baublis, Y. Watanabe, P. A. Rukoyatkin, A. Denisov, B. Meredith, Tomofumi Nagae, J. L. Nagle, V. Cianciolo, P. Kline, P. Castera, M. Leitgab, C. O. Kim, Atsushi Taketani, M. Ouchida, I. Younus, Sergey Fokin, Motoi Inaba, I. J. Choi, H. Qu, J. S. Kang, S. Motschwiller, M. Vargyas, M. L. Brooks, John Hill, J. H. Kang, J. S. Haggerty, S. R. Lee, M. Sarsour, Mate Csanad, S. P. Sorensen, V. Papavassiliou, A. Iordanova, Toru Sugitate, B. Lewis, B. Love, X. Bing, O. Chvala, B. Sahlmueller, Y. J. Kim, M. Nihashi, J. G. Lajoie, A. G. Litvinenko, T. Hachiya, Y. S. Lai, D. Watanabe, E. Vznuzdaev, R. P. Pisani, R. Seto, Kensuke Homma, Dmitry Blau, E. Richardson, E. J. Desmond, K. I. Hahn, E. Vazquez-Zambrano, A. Nederlof, B. Bassalleck, I. E. Yushmanov, L. Guo, K. Boyle, J. T. Mitchell, Alexei Khanzadeev, E. Stenlund, J. B. Choi, R. Seidl, Vladislav Manko, M. Slunečka, Dipak Kumar Mishra, C. Vale, Christine Angela Aidala, T. V. Moukhanova, R. A. Soltz, M. Grosse Perdekamp, Taku Gunji, M. E. Connors, Peter Christiansen, D. Winter, D. Yu Peressounko, S. D. Rolnick, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, C. McKinney, S. Nagamiya, Vaclav Vrba, Rui Wei, D. Isenhower, K. O. Eyser, Y. L. Yamaguchi, M. Kurosawa, A. Enokizono, J. Imrek, H. W. Van Hecke, A. Datta, H. Asano, A. Kiss, Jan Rak, Henner Buesching, R. Lacey, S. Butsyk, X. Gong, R. Granier de Cassagnac, A. Adare, L. A. Linden Levy, M. Tomášek, G. S. Kyle, James Alexander, K. Karatsu, Byung-Sik Hong, A. Bazilevsky, Alexandre Lebedev, Y. Hori, Anne Marie Sickles, D. M. Lee, K. Gainey, X. Jiang, D. Kotchetkov, B. Komkov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, S. H. Lim, R. Belmont, J. S. Kapustinsky, V. Babintsev, S. Edwards, K. S. Sim, R. Yang, S. Taneja, Hideki Hamagaki, K. Aoki, G. David, K. Watanabe, Yosuke Watanabe, K. Shoji, P. W. Stankus, T. Kempel, S. Kaneti, and A. V. Kazantsev
Subjects: Physics, Nuclear physics, Range (particle radiation), Pi, Exponent, General Physics and Astronomy, Parton, Impact parameter, Atomic physics, Nuclear Experiment, Relativistic Heavy Ion Collider, Power law, Spectral line
Abstract: Neutral-pion pi(0) spectra were measured at midrapidity (vertical bar y vertical bar < 0.35) in Au + Au collisions at root s(NN) = 39 and 62.4 GeV and compared with earlier measurements at 200 GeV in a transverse-momentum range of 1 < p(T) < 10 GeV/c. The high-p(T) tail is well described by a power law in all cases, and the powers decrease significantly with decreasing center-of-mass energy. The change of powers is very similar to that observed in the corresponding spectra for p + p collisions. The nuclear modification factors (RAA) show significant suppression, with a distinct energy, centrality, and p(T) dependence. Above p(T) = 7 GeV/c, R-AA is similar for root sNN = 62.4 and 200 GeV at all centralities. Perturbative-quantum-chromodynamics calculations that describe R-AA well at 200 GeV fail to describe the 39 GeV data, raising the possibility that, for the same p(T) region, the relative importance of initial-state effects and soft processes increases at lower energies. The p(T) range where pi(0) spectra in central Au + Au collisions have the same power as in p + p collisions is approximate to 5 and 7 GeV/c for root sNN = 200 and 62.4 GeV, respectively. For the root sNN = 39 GeV data, it is not clear whether such a region is reached, and the x(T) dependence of the x(T)-scaling power-law exponent is very different from that observed in the root sNN = 62 and 200 GeV data, providing further evidence that initial-state effects and soft processes mask the in-medium suppression of hardscattered partons to higher p(T) as the collision energy decreases.
Published: 2012

36. Development of an amplifier IC with wide dynamic range for Si detector in RIKEN SAMURAI spectrometer

Author: A. Taketani, A. Takuma, H. Murakami, Meiko Kurokawa, Kazuyoshi Kurita, and Manobu Tanaka
Subjects: Nuclear physics, Physics, Rigidity (electromagnetism), Spectrometer, Nuclear electronics, Amplifier, Detector, Wide dynamic range, Atomic number, Breakup
Abstract: A large acceptance and high magnetic rigidity spectrometer facility, SAMURAI is under construction at RlKEN. We plan to perform breakup reaction experiments that focus on the proton rich nuclei structure. The Si tracker needs to detect multiple nuclear fragments from the breakup reaction simultaneously. Atomic numbers of those fragments lie between 1 and 50. In the case of Sn breakup reaction, the energy deposition of fully stripped Z=50 fragment is 2500 times as large as that of Z=1 fragment. In order to realize such measurements, an amplifier with wide dynamic range of more than 2500 is required. Because it must operate under vacuum, it is necessary to minimize the amount of material. Therefore, we developed an amplifier IC which satisfies the requirements by implementing a square root gain response circuit.
Published: 2012

37. Ground and excited state charmonium production inp+pcollisions ats=200 GeV

Author: J. Gosset, S. Yokkaichi, Y. Ikeda, J. G. Boissevain, E. J. Mannel, C. Pinkenburg, M. Stepanov, G. Roche, Y. J. Mao, J. H. Kang, J. S. Haggerty, Y. S. Lai, J. T. Mitchell, V. S. Pantuev, Y. Onuki, Maya Hachiya Shimomura, I. Ravinovich, M. Gonin, Jan Rak, K. A. Drees, A. V. Kazantsev, E. H. Kim, X. Jiang, R. Lacey, K. S. Joo, Mate Csanad, Y. I. Makdisi, Vladimir Samsonov, A. Kiss, Alexander Milov, I. Nakagawa, R. Seidl, Vladislav Manko, C. L. Woody, A. Berdnikov, K. N. Barish, J. Hamblen, S. Nam, A. Sukhanov, H. Pereira, R. Vértesi, T. Ichihara, Hongfang Liu, D. E. Fields, B. V. Jacak, L. Tomášek, T. Engelmore, O. Drapier, Frank Ellinghaus, R. Pak, S. Sano, Ajit Kumar Mohanty, K. V. Dharmawardane, M. Bai, M. Slunečka, R. Granier de Cassagnac, A. Adare, E. R. Kinney, D. P. Morrison, M. Nihashi, M. McCumber, T. A. Shibata, C. L. Silva, K. Okada, Henner Buesching, B. Sahlmueller, T. Sato, Steve Edwards, H. En'yo, Takahiro Fusayasu, H. Iinuma, Y. Morino, M. J. Tannenbaum, S. Campbell, Tamas Ferenc Csorgo, David D'Enterria, M. J. Leitch, N. Kamihara, H. Torii, K. Das, S. Belikov, J. L. Nagle, S. Tarafdar, J. Hanks, N. Apadula, E. P. Hartouni, A. Kim, Sung Keun Park, Charles Maguire, L. Aphecetche, V. E. Semenov, Tatsuya Chujo, A. Caringi, D. Mukhopadhyay, S. Rembeczki, R. P. Pisani, M. L. Brooks, T. C. Awes, D. Isenhower, Marcus Hohlmann, N. N. Ajitanand, A. Toia, G. Grim, A. P.T. Palounek, Kyoichiro Ozawa, T. Liška, J. S. Bok, I. Tserruya, J. E. Frantz, L. Mašek, Alexander Malakhov, Kazuyoshi Kurita, Alice Mignerey, O. Dietzsch, Eva Haslum, G. S. Kyle, B. Lenzi, Jun Kikuchi, L. D'Orazio, K. Watanabe, Yu. Efremenko, T. Niita, V. Singh, B. Love, C. Vale, Takahiro Nakamura, B. S. Chang, C. Oakley, A. Drees, James Alexander, Marisilvia Donadelli, K. Karatsu, L. A. Linden Levy, V. Bumazhnov, Aaron Angerami, E. T. Atomssa, Y. Fukao, J. L. Charvet, A. Dion, P. Mikeš, R. Averbeck, K. Shoji, Christine Angela Aidala, Susumu Oda, Byung-Sik Hong, J. Klay, H. Valle, S. Afanasiev, D. Silvermyr, T. Hester, Andry Malala Rakotozafindrabe, A. Ster, Takao Sakaguchi, A. Bazilevsky, S. Esumi, Zhiying You, Dmitry Blau, Anne Marie Sickles, S. P. Sorensen, C. Klein-Boesing, R. Bennett, R. Tanabe, A. Durum, M. Kawashima, Philippe Rosnet, Dipanwita Dutta, J. Newby, W. A. Zajc, M. Kurosawa, D. Layton, L. S. Zolin, Johannes Peter Wessels, E. J. Desmond, I. V. Sourikova, Catherine Micaela Silvestre, A. Enokizono, Alexandre Lebedev, A. D. Frawley, K. O. Eyser, A. K. Purwar, K. Fujiwara, Minghui Liu, W. J. Park, Christopher Rosen, Y. L. Yamaguchi, P. W. Stankus, A. G. Litvinenko, O. Chvala, K. Yamaura, V. Baublis, P. Chung, D. M. Lee, S. Huang, A. Hadj Henni, M. Finger, W. C. Chang, Kiyoshi Tanida, F. Matathias, Julia Velkovska, A. Denisov, M. Kasai, V. Cianciolo, Kensuke Homma, P. D. Barnes, A. Yanovich, Seong H. Kim, E. Richardson, M. Togawa, E. Vazquez-Zambrano, M. Heffner, J. Park, M. Rosati, J. Imrek, D. Hornback, V-N. Tram, N. Grau, W. Holzmann, K. Kiriluk, Y. Tomita, Jongmin Lee, Kenneth Francis Read, A. Glenn, Beomkyu Kim, K. Boyle, Wei Xie, Rushan Han, C. A. Ogilvie, J. G. Lajoie, P. Constantin, B. Komkov, A. Datta, Sergey Fokin, S. Chernichenko, E. Kistenev, Eunja Kim, M. Ouchida, Taku Gunji, H. Gong, Kisung Lee, A. Taranenko, J. Seele, K. I. Hahn, T. K. Hemmick, Y. Tsuchimoto, Y. Iwanaga, B. Bassalleck, D. Lynch, Motoi Inaba, F. Kajihara, R. M. Wright, Tadaaki Isobe, Jen-Chieh Peng, Norio Saito, Tsutomu Mibe, J. M. Durham, B. Meredith, G. R. Young, I. J. Choi, A. Kravitz, N. Means, H. W. Van Hecke, M. A. L. Leite, Kazushi Miki, Yasuo Miake, A. A. Vinogradov, T. Horaguchi, A. Kozlov, R. Seto, K. Haruna, I. E. Yushmanov, M. Konno, K. B. Lee, J. Asai, Brajesh K. Singh, P. Lichtenwalner, Jiangyong Jia, Alexei Khanzadeev, Y. Goto, S. Butsyk, P. L. McGaughey, Inkyu Park, John Hill, H. A. Gustafsson, D. S. Jumper, S. Bathe, E. Stenlund, R. Belmont, L. Kochenda, M. Issah, Xiong Wang, Z. Conesa del Valle, Agneta Oskarsson, M. Chiu, Y. Nakamiya, Dong Jo Kim, V. L. Rykov, T. Dahms, J. B. Choi, S. Zhou, Shingo Sakai, J. S. Kapustinsky, V. Babintsev, Toru Sugitate, H. Qu, C. Zhang, Y. Berdnikov, D. Kleinjan, A. Baldisseri, S. Dairaku, S. D. Rolnick, K. Sakashita, T. L. Thomas, I. Danchev, Y. Akiba, P. Ružička, G. Baksay, M. Mishra, S. Nagamiya, D. Roach, K. M. Kijima, O. Zaudtke, A. Veicht, J. H. Bhom, X. He, Hideki Hamagaki, K. Aoki, Viktor Riabov, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, Ryugo S. Hayano, M. Virius, T. V. Moukhanova, M. I. Nagy, K. S. Sim, V. Dzhordzhadze, G. David, Jason Kamin, Y. Aramaki, D. Watanabe, Y. Riabov, S. P. Stoll, Xingguo Li, Kenta Shigaki, François Fleuret, M. D. Malik, M. Nguyen, Y. Kwon, E. Vznuzdaev, V. Peresedov, Y. J. Kim, R. A. Soltz, H. Borel, C. H. Chen, R. Yang, S. S.E. Rosendahl, A. S. Nyanin, G. Bunce, S. N. White, Rachid Nouicer, J. Koster, M. Proissl, M. Grosse Perdekamp, Deepa Thomas, S. Taneja, A. Churyn, M. E. Connors, D. Jouan, Y. Tanaka, Zvi Hirsh Citron, K. Imai, K. Nakano, T. Kempel, W. E. Sondheim, D. Ivanischev, S. Batsouli, H. Masui, A. K. Dubey, Dong-Hun Kim, P. A. Rukoyatkin, T. Jones, A. A. Bickley, Peter Christiansen, D. Winter, D. Yu Peressounko, P. Tarján, H. J. Moon, L. Baksay, H. Pei, Senta Greene, A. T. Basye, B. Fadem, E. O'Brien, C. Baumann, S. Kametani, C. P. Singh, B. M. Johnson, T. Murakami, A. Deshpande, R. J. Petti, A. Isupov, C. Suire, J. Sziklai, Brian Cole, S. Sawada, J. Ying, A. Franz, D. Sharma, Y. Watanabe, R. Ichimiya, Tae-Yeon Lee, Martin Purschke, I. Younus, A. Morreale, Z. Fraenkel, M. K. Dayananda, R. K. Choudhury, B. Azmoun, A. Král, M. J. Kweon, M. Wysocki, J. Jin, E. M. Takagui, A. Soldatov, M. Oka, R. S. Towell, I. Garishvili, F. Wei, Atsushi Taketani, P. Liebing, C. M. Camacho, Prashant Shukla, S. F. Pate, Ke. Nakamura, H. Al-Bataineh, M. Naglis, V. Papavassiliou, C. Y. Chi, Masayasu Ishihara, F. Staley, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, and A. Yu. Semenov
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Context (language use), 01 natural sciences, Nuclear physics, Particle decay, Excited state, 0103 physical sciences, Production model, Statistical precision, High Energy Physics::Experiment, Production (computer science), Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: We report on charmonium measurements [J/psi (1S), psi' (2S), and chi(c) (1P)] in p + p collisions at root s = 200 GeV. We find that the fraction of J/psi coming from the feed-down decay of psi' and chi(c) in the midrapidity region (vertical bar y vertical bar < 0: 35) is 9.6 +/- 2.4% and 32 +/- 9%, respectively. We also present the p(T) and rapidity dependencies of the J/psi yield measured via dielectron decay at midrapidity (vertical bar y vertical bar < 0.35) and via dimuon decay at forward rapidity (1.2 < vertical bar y vertical bar < 2.2). The statistical precision greatly exceeds that reported in our previous publication [Phys. Rev. Lett. 98, 232002 (2007)]. The new results are compared with other experiments and discussed in the context of current charmonium production models.
Published: 2012

38. Nuclear physics at the SCRIT electron scattering facility

Author: Tetsuya Ohnishi, Tatsuya Amagai, S. Wang, Tatsuya Adachi, Masanori Wakasugi, Shin-ichi Ichikawa, Tadaaki Tamae, Mamoru Togasaki, Masahiro Hara, Toshitada Hori, A. Enokizono, Kazuyoshi Kurita, Kayoko Yanagi, Toshimi Suda, Yuuto Shimakura, Ryo Ogawara, and Takaya Miyamoto
Subjects: Elastic scattering, Physics, Luminosity (scattering theory), Scattering, Nuclear Theory, Nuclear structure, General Physics and Astronomy, Electron, Linear particle accelerator, Nuclear physics, Physics::Accelerator Physics, Nuclear Experiment, Electron scattering, Lepton
Abstract: The SCRIT electron scattering facility is under construction at the RIKEN RI Beam Factory. This is the worlds first facility dedicated to the study of the structure of short-lived nuclei by electron scattering, which has been a long-standing dream for nuclear physics. A novel Self-Confining RI Target (SCRIT) technique makes this challenging research possible. A series of test experiments using stable nuclei performed at this partially completed facility show that the collision luminosity between electron beam and target nucleus reaches 10^27cm^-'2s^-'1, which is required for an elastic electron scattering measurement to determine the charge density distribution of the target nucleus. The first electron scattering for unstable Sn isotopes will take place in the year 2014. Nuclear Physics at the SCRIT Electron Scattering Facility
Published: 2012

39. Measurements of Higher Order Flow Harmonics inAu+AuCollisions atsNN=200 GeV

Author: R. Pak, Vladimir Samsonov, Beomkyu Kim, K. Boyle, N. Kamihara, Wei Xie, Ajit Kumar Mohanty, T. A. Shibata, T. Sato, Kazuyoshi Kurita, F. Matathias, M. Ouchida, A. Drees, Tamas Ferenc Csorgo, Kensuke Homma, E. Richardson, K. N. Barish, D. Isenhower, A. Toia, Maya Hachiya Shimomura, Y. I. Makdisi, V. S. Pantuev, A. Yu. Semenov, J. L. Nagle, M. I. Nagy, D. Watanabe, P. Constantin, M. D. Malik, E. Vznuzdaev, J. Hamblen, S. Tarafdar, N. Means, S. P. Sorensen, K. I. Hahn, B. Bassalleck, T. Kempel, Dong-Hun Kim, M. J. Tannenbaum, H. Torii, Eva Haslum, B. Lenzi, Tadaaki Isobe, K. Karatsu, C. Silvestre, Marisilvia Donadelli, V. Bumazhnov, S. Afanasiev, S. Sano, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Yokkaichi, B. Meredith, O. Chvala, P. L. McGaughey, Johannes Peter Wessels, Andry Malala Rakotozafindrabe, J. Newby, John Hill, Toru Sugitate, M. Konno, Anne Marie Sickles, R. Tanabe, K. Watanabe, Alice Mignerey, D. Hornback, M. L. Brooks, S. Butsyk, Y. J. Mao, François Fleuret, K. Okada, B. Sahlmueller, J. H. Kang, J. P. Wood, J. S. Haggerty, Seong H. Kim, A. V. Kazantsev, W. A. Zajc, A. Taranenko, V. Baublis, A. Denisov, H. En'yo, R. A. Soltz, K. Shoji, Y. Tanaka, Kazushi Miki, Brajesh K. Singh, X. He, J. T. Mitchell, M. Chiu, T. Ichihara, S. Zhou, M. J. Leitch, J. G. Lajoie, Takahiro Fusayasu, K. A. Drees, L. Tomášek, V. Cianciolo, Sergey Fokin, T. Horaguchi, M. Grosse Perdekamp, P. W. Stankus, M. E. Connors, Y. Aramaki, C. A. Ogilvie, V. Peresedov, Alexander Malakhov, D. Silvermyr, S. D. Rolnick, P. Mikeš, Kisung Lee, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, R. Seidl, Vladislav Manko, Takao Sakaguchi, T. K. Hemmick, L. S. Zolin, G. R. Young, W. J. Park, Christopher Rosen, A. Yanovich, I. J. Choi, A. Kravitz, K. B. Lee, M. Slunečka, K. Tanida, Rushan Han, O. Drapier, J. Koster, Frank Ellinghaus, E. J. Desmond, E. R. Kinney, D. P. Morrison, Y. J. Kwon, M. Kurosawa, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, J. M. Durham, Y. Onuki, Peter Christiansen, A. K. Purwar, K. Fujiwara, A. D. Frawley, D. Winter, S. Belikov, D. Yu Peressounko, S. N. White, Y. L. Yamaguchi, H. Masui, Zvi Hirsh Citron, Y. S. Lai, K. Nakano, Y. Ikeda, S. Campbell, Yasuo Miake, C. L. Woody, A. Berdnikov, A. A. Bickley, E. J. Mannel, W. E. Sondheim, D. Ivanischev, Jan Rak, R. Lacey, P. A. Rukoyatkin, K. Das, E. P. Hartouni, P. Chung, D. Roach, K. M. Kijima, M. Togawa, E. Vazquez-Zambrano, R. Granier de Cassagnac, A. Adare, L. Kochenda, M. Issah, P. Tarján, J. Park, B. Love, L. Baksay, C. Vale, Minghui Liu, H. Qu, M. Heffner, A. Datta, S. Huang, C. Pinkenburg, Kenneth Francis Read, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, Christine Angela Aidala, H. A. Gustafsson, Senta Greene, H. Pei, Xingguo Li, A. G. Litvinenko, E. Leitner, D. Kotchetkov, V. Singh, Y. Nakamiya, C. Zhang, Hideki Hamagaki, K. Aoki, A. T. Basye, G. David, M. Gonin, W. Holzmann, G. Roche, P. Ružička, Y. Tsuchimoto, B. Fadem, E. O'Brien, K. Sakashita, A. Kozlov, R. Seto, K. S. Sim, G. Baksay, O. Dietzsch, Viktor Riabov, E. T. Atomssa, A. Sukhanov, H. Pereira, I. V. Sourikova, T. L. Thomas, Y. Morino, I. Danchev, R. Yang, I. E. Yushmanov, Y. J. Kim, Ryugo S. Hayano, H. Valle, Dipanwita Dutta, K. Imai, Y. Riabov, Alexei Khanzadeev, Kenta Shigaki, M. Nguyen, E. Stenlund, A. S. Nyanin, Rachid Nouicer, H. W. Van Hecke, M. Proissl, Julia Velkovska, Jason Kamin, Eunja Kim, Jen-Chieh Peng, T. V. Moukhanova, Charles Maguire, S. P. Stoll, M. Rosati, R. Vértesi, A. Kiss, Inkyu Park, Henner Buesching, E. Kistenev, Xiong Wang, A. A. Vinogradov, S. S.E. Rosendahl, Steve Edwards, Dong Jo Kim, G. Bunce, J. E. Frantz, Jiangyong Jia, Y. Goto, A. Veicht, Marcus Hohlmann, L. A. Linden Levy, D. Jouan, S. Bathe, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, S. Dairaku, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, F. Wei, Kyeongpil Lee, S. Sawada, J. Ying, A. Franz, M. Virius, J. Ide, C. Y. Chi, C. Baumann, C. H. Chen, S. Kametani, C. P. Singh, B. M. Johnson, A. Glenn, A. Isupov, J. Sziklai, Jongmin Lee, Brian Cole, D. Lynch, D. S. Jumper, T. Dahms, I. Ravinovich, M. Wysocki, M. Bai, C. M. Camacho, M. Naglis, Zhiying You, R. Bennett, M. Kawashima, M. Finger, Prashant Shukla, C. L. Silva, S. F. Pate, H. Al-Bataineh, Masayasu Ishihara, V. Papavassiliou, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, E. H. Kim, K. Sedgwick, A. Deshpande, Y. Watanabe, I. Younus, B. Komkov, Norio Saito, Hongfang Liu, D. E. Fields, M. A. L. Leite, B. V. Jacak, M. McCumber, Y. Fukao, R. Belmont, J. S. Kapustinsky, V. Babintsev, G. S. Kyle, J. Hanks, James Alexander, R. Averbeck, Byung-Sik Hong, T. Hester, Sung Keun Park, N. N. Ajitanand, A. Bazilevsky, Philippe Rosnet, Alexandre Lebedev, D. M. Lee, Takahiro Nakamura, K. Kiriluk, Susumu Oda, N. A. Sparks, A. Durum, K. Yamaura, Martin Purschke, N. Grau, Motoi Inaba, R. M. Wright, Mate Csanad, R. P. Pisani, A. Morreale, Z. Fraenkel, R. K. Choudhury, B. Azmoun, A. Král, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, P. Liebing, K. S. Joo, S. Esumi, D. Sharma, and R. Ichimiya
Subjects: Nuclear physics, Physics, Harmonics, Monte Carlo method, General Physics and Astronomy, Entropy (information theory), Rapidity, Boundary value problem, Nuclear Experiment, Anisotropy, Collision, Glauber
Abstract: Flow coefficients nu(n) for n = 2, 3, 4, characterizing the anisotropic collective flow in Au + Au collisions at root s(NN) = 200 GeV, are measured relative to event planes Psi(n), determined at large rapidity. We report nu(n) as a function of transverse momentum and collision centrality, and study the correlations among the event planes of different order n. The nu(n) are well described by hydrodynamic models which employ a Glauber Monte Carlo initial state geometry with fluctuations, providing additional constraining power on the interplay between initial conditions and the effects of viscosity as the system evolves. This new constraint can serve to improve the precision of the extracted shear viscosity to entropy density ratio eta/s.
Published: 2011

40. J/ψsuppression at forward rapidity in Au+Au collisions atsNN=200GeV

Author: K. Sakashita, Sung Keun Park, K. S. Joo, N. N. Ajitanand, K. A. Drees, Takahiro Nakamura, Y. J. Kwon, Jason Kamin, Susumu Oda, R. A. Soltz, M. Grosse Perdekamp, M. E. Connors, S. Belikov, S. Esumi, K. Tanida, Peter Christiansen, P. Tarján, D. Winter, S. P. Stoll, D. Roach, K. M. Kijima, A. Durum, Vladimir Samsonov, D. Kotchetkov, Y. Fukao, D. Sharma, Minghui Liu, R. Ichimiya, S. S.E. Rosendahl, G. Bunce, T. Hester, B. Azmoun, A. Král, Y. J. Mao, M. Heffner, E. H. Kim, K. Das, E. P. Hartouni, K. Yamaura, Kenneth Francis Read, D. Jouan, Tamas Ferenc Csorgo, V. S. Pantuev, Senta Greene, A. T. Basye, B. Fadem, E. O'Brien, M. Oka, J. H. Kang, J. S. Haggerty, Xingguo Li, N. A. Sparks, J. L. Nagle, J. Hamblen, Johannes Peter Wessels, M. Gonin, R. Pak, A. Dion, Hongfang Liu, D. E. Fields, N. Kamihara, K. Okada, B. Sahlmueller, H. En'yo, C. Silvestre, Marisilvia Donadelli, V. Bumazhnov, M. J. Leitch, B. V. Jacak, W. A. Zajc, H. Hamagaki, A. Sukhanov, H. Pereira, A. V. Kazantsev, M. Kurosawa, Andry Malala Rakotozafindrabe, M. I. Nagy, Kazuyoshi Kurita, N. Grau, M. McCumber, Y. Morino, V. Baublis, Atsushi Taketani, G. S. Kyle, D. Watanabe, A. Denisov, M. D. Malik, R. Tanabe, E. Vznuzdaev, A. Drees, A. Enokizono, P. Liebing, James Alexander, J. Hanks, R. Averbeck, Byung-Sik Hong, M. Wysocki, A. Bazilevsky, Motoi Inaba, R. M. Wright, Martin Purschke, Sergey Fokin, P. Chung, Rushan Han, L. Tomášek, S. P. Sorensen, Philippe Rosnet, Beomkyu Kim, K. Boyle, Y. Tanaka, H. Å Gustafsson, Wei Xie, M. Chiu, Alexandre Lebedev, C. A. Ogilvie, Shinhong Kim, O. Chvala, Mate Csanad, Kisung Lee, T. K. Hemmick, D. M. Lee, A. Morreale, J. M. Durham, Yasuo Miake, Y. S. Lai, K. Kiriluk, A. Datta, E. J. Desmond, J. G. Lajoie, B. Komkov, P. Mikeš, L. Kochenda, M. Issah, R. K. Choudhury, A. K. Purwar, K. Fujiwara, Taku Gunji, H. Gong, J. Seele, I. J. Choi, Norio Saito, A. Kravitz, L. Baksay, M. A. L. Leite, F. Kajihara, S. Sawada, H. Pei, J. Ying, A. Franz, M. Togawa, E. Vazquez-Zambrano, Y. L. Yamaguchi, R. Belmont, J. S. Kapustinsky, V. Babintsev, O. Dietzsch, R. P. Pisani, S. Butsyk, Maya Hachiya Shimomura, J. Park, C. M. Camacho, Prashant Shukla, C. Zhang, E. T. Atomssa, S. Zhou, H. Valle, S. F. Pate, T. C. Awes, Kyoichiro Ozawa, T. Liška, S. D. Rolnick, J. S. Bok, P. Ružička, Dipanwita Dutta, E. Leitner, H. Al-Bataineh, Tadaaki Isobe, Julia Velkovska, A. Y. Semenov, M. Rosati, Ajit Kumar Mohanty, T. A. Shibata, Y. Tsuchimoto, Y. I. Makdisi, Viktor Riabov, T. Sato, S. Yokkaichi, V. Papavassiliou, A. A. Vinogradov, I. E. Yushmanov, Jiangyong Jia, Alexei Khanzadeev, P. L. McGaughey, Y. Goto, E. Stenlund, D. Isenhower, H. Qu, Y. Ikeda, E. J. Mannel, H. W. Van Hecke, A. Toia, C. Pinkenburg, T. V. Moukhanova, S. Bathe, K. Aoki, R. Vértesi, Agneta Oskarsson, G. Roche, G. David, Y. Berdnikov, Y. Akiba, M. Mishra, J. E. Frantz, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, M. Naglis, Charles Maguire, A. Kiss, C. L. Silva, Henner Buesching, Steve Edwards, Masayasu Ishihara, Marcus Hohlmann, C. Baumann, S. Kametani, L. A. Linden Levy, A. Deshpande, C. P. Singh, B. M. Johnson, A. Isupov, J. Sziklai, M. J. Tannenbaum, Brian Cole, E. Kistenev, H. Torii, T. Kempel, Dong-Hun Kim, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, F. Wei, Kyeongpil Lee, J. T. Mitchell, J. Ide, R. Seidl, Vladislav Manko, M. Slunečka, C. Y. Chi, Y. Watanabe, K. Watanabe, Alice Mignerey, K. Shoji, S. Dairaku, V. Cianciolo, M. Virius, C. H. Chen, T. Horaguchi, I. Younus, P. W. Stankus, A. Glenn, I. Ravinovich, M. Bai, Takao Sakaguchi, D. Kawall, C. Vale, A. D. Frawley, Zhiying You, H. Themann, S. Huang, R. Bennett, M. Kawashima, M. Finger, Christine Angela Aidala, W. Holzmann, M. Ouchida, N. Means, Jongmin Lee, J. Murata, Y. Nakamiya, X. He, Y. Aramaki, V. Peresedov, D. Lynch, T. L. Thomas, J. Koster, Gerd Joachim Kunde, I. Shein, D. S. Jumper, G. Baksay, H. Masui, Ryugo S. Hayano, A. A. Bickley, Y. Riabov, T. Dahms, Kenta Shigaki, K. Sedgwick, M. Nguyen, K. N. Barish, A. S. Nyanin, Rachid Nouicer, M. Proissl, Y. J. Kim, T. Ichihara, J. P. Wood, C. L. Woody, A. Berdnikov, Alexander Milov, Takahiro Fusayasu, S. Sano, I. Nakagawa, Alexander Malakhov, R. Luechtenborg, T. Engelmore, K. Karatsu, D. Silvermyr, O. Drapier, L. S. Zolin, W. J. Park, Christopher Rosen, Frank Ellinghaus, A. Yanovich, E. R. Kinney, S. N. White, D. P. Morrison, S. Campbell, Anne Marie Sickles, Zvi Hirsh Citron, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, K. Nakano, F. Matathias, V. Singh, I. V. Sourikova, M. L. Brooks, W. E. Sondheim, D. Ivanischev, Kensuke Homma, B. Love, P. A. Rukoyatkin, G. R. Young, B. Meredith, Z. Fraenkel, E. Richardson, John Hill, Toru Sugitate, Eunja Kim, Jen-Chieh Peng, K. S. Sim, P. Constantin, A. G. Litvinenko, Inkyu Park, Xiong Wang, K. I. Hahn, Dong Jo Kim, B. Bassalleck, R. Yang, A. Veicht, François Fleuret, A. Kozlov, M. Konno, K. Imai, R. Seto, Y. Onuki, D. Y.-U. Peressounko, Jan Rak, R. Lacey, R. Granier de Cassagnac, A. Adare, I. Danchev, S. Tarafdar, Eva Haslum, B. Lenzi, S. Afanasiev, J. Newby, D. Hornback, A. Taranenko, Kazushi Miki, Brajesh K. Singh, and K. B. Lee
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Quark–gluon plasma, Binary number, Parton, Rapidity, Charm (quantum number), Nuclear Experiment, Breakup, Nuclear matter, Gluon
Abstract: Heavy quarkonia are observed to be suppressed in relativistic heavy-ion collisions relative to their production in p + p collisions scaled by the number of binary collisions. In order to determine if this suppression is related to color screening of these states in the produced medium, one needs to account for other nuclear modifications including those in cold nuclear matter. In this paper, we present new measurements from the PHENIX 2007 data set of J/psi yields at forward rapidity (1.2 < vertical bar y vertical bar < 2.2) in Au + Au collisions at root s(NN) = 200 GeV. The data confirm the earlier finding that the suppression of J/. at forward rapidity is stronger than at midrapidity, while also extending the measurement to finer bins in collision centrality and higher transverse momentum (p(T)). We compare the experimental data to the most recent theoretical calculations that incorporate a variety of physics mechanisms including gluon saturation, gluon shadowing, initial-state parton energy loss, cold nuclear matter breakup, color screening, and charm recombination. We find J/psi suppression beyond cold-nuclear-matter effects. However, the current level of disagreement between models and d + Au data precludes using these models to quantify the hot-nuclear-matter suppression.
Published: 2011

41. Suppression of Back-to-Back Hadron Pairs at Forward Rapidity ind+AuCollisions atsNN=200 GeV

Author: F. Matathias, Kensuke Homma, E. Richardson, L. Tomášek, K. I. Hahn, Y. Fukao, B. Bassalleck, Alexei Khanzadeev, M. Konno, T. Hester, A. Kiss, E. Stenlund, J. B. Choi, Henner Buesching, Steve Edwards, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, Y. Nakamiya, G. Baksay, S. Belikov, Y. J. Kim, Marcus Hohlmann, C. Vale, K. V. Dharmawardane, X. He, N. Grau, X. Jiang, H. Pei, Christine Angela Aidala, K. S. Sim, Maya Hachiya Shimomura, Y. I. Makdisi, T. Horaguchi, M. Rosati, K. Sakashita, Hongfang Liu, D. E. Fields, C. Silvestre, T. Murakami, Y. Aramaki, Martin Purschke, V. Peresedov, Robert Vertesi, B. V. Jacak, Y. Ikeda, E. J. Mannel, C. L. Woody, A. Berdnikov, Alexander Milov, T. C. Awes, Kyoichiro Ozawa, T. Liška, Marisilvia Donadelli, V. Bumazhnov, Motoi Inaba, B. Meredith, L. A. Linden Levy, R. Yang, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, C. Pinkenburg, J. Koster, J. S. Bok, Jun Kikuchi, M. McCumber, R. M. Wright, A. Caringi, J. H. Bhom, E. R. Kinney, M. Gonin, S. Tarafdar, John Hill, Toru Sugitate, D. P. Morrison, A. Morreale, S. Campbell, R. Tanabe, S. Taneja, H. Masui, J. Jin, Jason Kamin, Mate Csanad, Jongmin Lee, D. Lynch, T. Kempel, E. M. Takagui, A. Sukhanov, Jiangyong Jia, Z. Fraenkel, Y. Goto, M. Naglis, S. Bathe, G. Roche, M. J. Tannenbaum, Y. J. Kwon, S. Sawada, J. Ying, A. Franz, T. V. Moukhanova, C. Baumann, D. Watanabe, H. Pereira, Y. Morino, D. S. Jumper, K. Imai, H. Torii, K. A. Drees, R. K. Choudhury, François Fleuret, J. Hanks, S. P. Stoll, M. D. Malik, Dmitry Blau, T. Dahms, Agneta Oskarsson, H. A. Gustafsson, Tatsuya Chujo, B. Azmoun, A. Král, Y. Onuki, E. Vznuzdaev, C. P. Singh, I. V. Sourikova, T. Ichihara, Rushan Han, M. Nihashi, B. M. Johnson, Sung Keun Park, Charles Maguire, Masayasu Ishihara, S. Dairaku, I. Tserruya, Yu. Efremenko, Minghui Liu, A. Kim, Jan Rak, S. S.E. Rosendahl, K. N. Barish, G. Bunce, Takahiro Fusayasu, Vladimir Samsonov, R. J. Petti, Eva Haslum, E. J. Desmond, Y. Berdnikov, G. Grim, K. B. Lee, N. N. Ajitanand, V. Singh, R. Lacey, S. Nam, Alexander Malakhov, Y. Akiba, D. Silvermyr, M. Oka, M. Togawa, M. Heffner, R. Granier de Cassagnac, Kenneth Francis Read, A. Adare, P. Ružička, S. Nagamiya, L. S. Zolin, W. J. Park, Christopher Rosen, M. Virius, A. Isupov, D. Kawall, H. Themann, E. Vazquez-Zambrano, M. Kasai, Tamas Ferenc Csorgo, Alice Mignerey, J. Sziklai, S. Sano, R. P. Pisani, A. Yanovich, O. Dietzsch, J. L. Nagle, E. T. Atomssa, L. D'Orazio, D. Jouan, H. Valle, Viktor Riabov, E. Kistenev, Atsushi Taketani, P. Liebing, A. Dion, Takahiro Nakamura, M. I. Nagy, S. Yokkaichi, Dipanwita Dutta, Brian Cole, S. N. White, Deepa Thomas, C. H. Chen, R. Pak, J. Murata, Y. Tsuchimoto, Y. Iwanaga, K. S. Joo, P. Lichtenwalner, M. Ouchida, K. Das, M. L. Brooks, K. Karatsu, Zvi Hirsh Citron, Johannes Peter Wessels, Julia Velkovska, A. Glenn, Susumu Oda, Takao Sakaguchi, B. Komkov, Y. J. Mao, K. Watanabe, S. Afanasiev, K. Nakano, I. Ravinovich, Anne Marie Sickles, W. E. Sondheim, N. Means, R. S. Towell, Aaron Angerami, Gerd Joachim Kunde, Eunja Kim, I. E. Yushmanov, B. Love, A. D. Frawley, D. Ivanischev, A. Durum, D. Roach, P. A. Rukoyatkin, I. Garishvili, M. Bai, I. Shein, N. Apadula, Jen-Chieh Peng, P. L. McGaughey, Beomkyu Kim, K. Boyle, Vaclav Vrba, Norio Saito, Tsutomu Mibe, Klaus Johannes Reygers, J. Newby, Kazuyoshi Kurita, F. Wei, W. A. Zajc, M. K. Dayananda, K. M. Kijima, S. Huang, J. H. Kang, K. Shoji, J. S. Haggerty, M. A. L. Leite, C. Oakley, A. G. Litvinenko, A. Drees, V. Baublis, A. Denisov, V. Cianciolo, K. Sedgwick, Inkyu Park, Rui Wei, W. Holzmann, K. Yamaura, V. S. Pantuev, Sergey Fokin, Zhiying You, M. Wysocki, S. Esumi, A. Deshpande, Xiong Wang, D. Sharma, Z. Conesa del Valle, Dong Jo Kim, P. W. Stankus, G. R. Young, R. Bennett, M. Kawashima, R. Ichimiya, Y. Tanaka, T. L. Thomas, M. Finger, A. Veicht, R. Seto, D. Hornback, M. Chiu, R. Belmont, J. S. Kapustinsky, Xingguo Li, J. E. Frantz, Ryugo S. Hayano, V. Babintsev, J. Hamblen, Y. S. Lai, C. A. Ogilvie, C. Y. Chi, Y. Watanabe, G. S. Kyle, I. Danchev, Kisung Lee, T. K. Hemmick, Y. Riabov, Kenta Shigaki, I. Younus, Prashant Shukla, J. M. Durham, H. J. Moon, L. Baksay, Yasuo Miake, S. P. Sorensen, M. Nguyen, K. Fujiwara, H. Qu, James Alexander, K. Okada, A. S. Nyanin, S. F. Pate, R. Averbeck, A. Taranenko, Hideki Hamagaki, K. Aoki, Byung-Sik Hong, A. Bazilevsky, L. Kochenda, M. Issah, Rachid Nouicer, O. Chvala, M. Proissl, B. Sahlmueller, G. David, Y. L. Yamaguchi, Kazushi Miki, H. En'yo, Alexandre Lebedev, M. J. Leitch, D. M. Lee, Ke. Nakamura, J. G. Lajoie, Brajesh K. Singh, H. Al-Bataineh, I. J. Choi, A. Kravitz, H. W. Van Hecke, V. Papavassiliou, R. A. Soltz, M. Grosse Perdekamp, M. E. Connors, K. Tanida, T. Jones, Peter Christiansen, D. Winter, D. Yu Peressounko, Senta Greene, A. T. Basye, B. Fadem, E. O'Brien, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, D. Isenhower, A. Toia, M. Kurosawa, A. Enokizono, P. Chung, A. Datta, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Butsyk, S. Zhou, S. D. Rolnick, and A. V. Kazantsev
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, General Physics and Astronomy, Parton, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Impact parameter, Nuclear Experiment, 010306 general physics, Nucleon, Relativistic Heavy Ion Collider
Abstract: Back-to-back hadron pair yields in d + Au and p + p collisions at root S-NN = 200 GeV were measured with the PHENIX detector at the Relativistic Heavy Ion Collider. Rapidity separated hadron pairs were detected with the trigger hadron at pseudorapidity vertical bar eta vertical bar < 0: 35 and the associated hadron at forward rapidity (deuteron direction, 3.0< eta < 3.8). Pairs were also detected with both hadrons measured at forward rapidity; in this case, the yield of back-to-back hadron pairs in d + Au collisions with small impact parameters is observed to be suppressed by a factor of 10 relative to p + p collisions. The kinematics of these pairs is expected to probe partons in the Au nucleus with a low fraction x of the nucleon momenta, where the gluon densities rise sharply. The observed suppression as a function of nuclear thickness, p(T), and eta points to cold nuclear matter effects arising at high parton densities.
Published: 2011

42. Heavy-quark production inp+pand energy loss and flow of heavy quarks in Au + Au collisions atsNN=200GeV

Author: S. Y. Fung, M. Chiu, Maya Hachiya Shimomura, T. A. Shibata, Y. I. Makdisi, Z. Fraenkel, Steven E. Skutnik, S. Bathe, John Hill, Agneta Oskarsson, V. S. Pantuev, H. A. Torii, Toru Sugitate, L. D. Isenhower, Y. Berdnikov, Y. Akiba, M. Harvey, M. J. Tannenbaum, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, D. Isenhower, A. Toia, L. Mašek, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, Vaclav Vrba, Klaus Johannes Reygers, H. Qu, C. Vale, Junji Tojo, B. S. Chang, Christine Angela Aidala, J. Klay, D. Mukhopadhyay, S. Rembeczki, M. Rosati, François Fleuret, D. Bucher, B. Forestier, I. Ravinovich, Y. Nagata, J. Gosset, J. P. Sullivan, R. Vértesi, K. Okada, B. Sahlmueller, H. En'yo, P. Constantin, Saskia Mioduszewski, S. N. White, S. F. Pate, Anne Marie Sickles, S. Kelly, Hideki Hamagaki, K. Aoki, G. David, F. Matathias, S. S. Ryu, M. J. Leitch, M. Gonin, J. Chiba, N. N. Ajitanand, Mate Csanad, P. Tarján, A. A. Vinogradov, Henrik Tydesjö, K. Nakano, Kensuke Homma, S. Chernichenko, H. Lim, B. Bassalleck, M. Konno, Y. Nakamiya, G. C. Mishra, G. Baksay, M. T. Bjorndal, R. Bennett, Ahmed Al-Jamel, M. Finger, Y. L. Yamaguchi, B. Komkov, Takao Sakaguchi, H. Al-Bataineh, W. E. Sondheim, Norio Saito, Takahiro Nakamura, M. A. L. Leite, C. Klein-Boesing, K. Dehmelt, A. Kiss, D. Kawall, C. L. Woody, Z. Yasin, Henner Buesching, Jiangyong Jia, Y. Goto, O. Zaudtke, A. D. Frawley, T. Tabaru, Jen-Chieh Peng, S. Yokkaichi, P. A. Rukoyatkin, H. Pei, G. R. Young, J. M. Burward-Hoy, H. Pereira, V. I. Kochetkov, Alexei Khanzadeev, J. M. Heuser, T. Ichihara, Osamu Jinnouchi, S. H. Aronson, J. Jin, E. M. Takagui, Marcus Hohlmann, M. Virius, W. Holzmann, C. P. Singh, B. M. Johnson, J. Murata, B. Azmoun, A. Král, M. J. Kweon, Y. Le Bornec, Gerd Joachim Kunde, Matthew G. Reuter, Takahiro Fusayasu, I. D. Ojha, Alexander Malakhov, Susumu Oda, T. Shohjoh, A. Durum, W. C. Smith, V. Babintsev, K. O. Eyser, K. Fujiwara, C. R. Cleven, C. Haegemann, Y. Inoue, Y. Cobigo, D. Silvermyr, V. Papavassiliou, Sébastien Gadrat, A. Isupov, C. Suire, I. Shein, D. S. Brown, Jan Rak, Xiong Wang, J. G. Boissevain, I. V. Sourikova, Masashi Kaneta, R. Pak, N. Kamihara, X. He, O. O. Omiwade, V. Peresedov, Dong Jo Kim, E. Stenlund, H. Sakata, M. K. Lee, E. H. Kim, L. S. Zolin, David D'Enterria, P. J. Kroon, Dong-Hun Kim, P. D. Barnes, J. E. Frantz, Hiroaki Ohnishi, R. Lacey, J. Sziklai, W. J. Park, Alberto Baldisseri, R. Armendariz, C. Pinkenburg, A. Yanovich, M. Oka, S. K. Tuli, R. Granier de Cassagnac, Herve Borel, D. Lynch, A. Adare, M. Naglis, Senta Greene, D. E. Fields, K. Hasuko, B. V. Jacak, Brian Cole, R. P. Pisani, C. L. Silva, R. S. Towell, M. Stepanov, G. Roche, Kazuyoshi Kurita, H. Masui, A. K. Dubey, A. Glenn, O. Dietzsch, E. T. Atomssa, Masayasu Ishihara, Y. J. Mao, S. Kametani, A. Dion, Susumu Sato, I. Garishvili, Akio Kiyomichi, M. Mitrovski, A. Deshpande, M. McCumber, A. K. Purwar, H. Valle, Alexander Milov, I. Nakagawa, H. W. Van Hecke, V. L. Rykov, T. Dahms, A. A. Bickley, A. Drees, N. Grau, J. H. Kang, J. S. Haggerty, T. V. Moukhanova, K. Shoji, J. Kubart, O. Drapier, Frank Ellinghaus, B. E. Norman, Xiao-yan Li, N. Kurihara, S. Takagi, M. Ouchida, Nikolay Tyurin, Y. Watanabe, Atsushi Taketani, K. N. Barish, E. R. Kinney, I. Younus, D. P. Morrison, S. Campbell, E. O'Brien, R. A. Soltz, Julia Velkovska, P. W. Stankus, A. Soldatov, J. Asai, A. Enokizono, M. Wysocki, V. E. Semenov, M. B. Deaton, E. J. Desmond, M. N. Wagner, Y. Fukao, G. S. Kyle, A. Shevel, M. Grosse Perdekamp, Y. Tanaka, N. Willis, James Alexander, K. S. Sim, Tatsuya Chujo, Y. S. Lai, I. Tserruya, M. G. Hur, C. Y. Chi, Tae-Yeon Lee, J. Egdemir, M. Togawa, Yu. Efremenko, V. Singh, T. K. Shea, R. Averbeck, Martin Purschke, T. Hester, Robert F. Hobbs, Byung-Sik Hong, A. Bazilevsky, Y. Kwon, Joakim Nystrand, J. Park, M. L. Brooks, Florian Bauer, Philippe Rosnet, Jason Kamin, F. Gastineau, H. Hiejima, B. Love, Alexandre Lebedev, F. Staley, L. Baksay, K. Das, D. Winter, Charles Maguire, S. Leckey, D. Yu Peressounko, D. M. Lee, Marie Germain, S. P. Stoll, Eva Haslum, B. Lenzi, Shingo Sakai, Josh Moss, Kiyoshi Tanida, Xingguo Li, Debashish Pal, Y. Tsuchimoto, J. L. Drachenberg, S. Sawada, E. P. Hartouni, A. G. Litvinenko, K. Imai, E. Kistenev, Hirohiko Sato, J. Ying, A. Franz, T. L. Thomas, H. Harada, S. S.E. Rosendahl, G. Bunce, D. Kotchetkov, A. Kozlov, R. Seto, S. P. Sorensen, K. Haruna, Dylan Walker, B. Espagnon, V. Dzhordzhadze, S. Afanasiev, A. Morreale, V-N. Tram, I. E. Yushmanov, J. G. Lajoie, A. Churyn, D. Jouan, A. Ster, T. Hachiya, Motoi Inaba, I. J. Choi, A. Kravitz, Ryugo S. Hayano, A. Romana, J. Newby, K. S. Joo, Y. Riabov, Kenta Shigaki, C. A. Ogilvie, T. K. Hemmick, D. Hornback, M. Nguyen, A. Taranenko, Yasuo Miake, Kazushi Miki, S. Esumi, D. Sharma, A. S. Nyanin, L. Kochenda, Rachid Nouicer, T. Kawagishi, S. Belikov, L. Aphecetche, Minghui Liu, M. Heffner, C. Silvestre, Kenneth Francis Read, A. V. Kazantsev, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, L. Tomášek, P. Mikeš, Andry Malala Rakotozafindrabe, T. C. Awes, Kyoichiro Ozawa, T. Liška, Jun Kikuchi, Johannes Peter Wessels, Tadaaki Isobe, J. S. Chai, P. L. McGaughey, Rushan Han, M. N. Hagiwara, M. Issah, C. Zhang, J. Zimányi, S. Butsyk, Vladimir Samsonov, M. D. Malik, I. Otterlund, E. Vznuzdaev, Viktor Riabov, W. A. Zajc, Tamas Ferenc Csorgo, V. Baublis, A. Hadj Henni, J. L. Nagle, A. Denisov, V. Cianciolo, Sergey Fokin, T. Horaguchi, K. Boyle, H. Å Gustafsson, Wei Xie, S. Batsouli, H. Iinuma, M. C. McCain, A. P.T. Palounek, H. Kanou, Taku Gunji, H. Gong, J. Seele, F. Kajihara, H. Delagrange, S. Zhou, Y. S. Kim, J. L. Charvet, T. E. Miller, P. Chung, M. Holmes, and W. S. Emam
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Electron, 01 natural sciences, 7. Clean energy, Spectral line, Nuclear physics, Flow (mathematics), 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Anisotropy, Relativistic Heavy Ion Collider
Abstract: Transverse momentum spectra of electrons (p(T)(e)) from semileptonic weak decays of heavy-flavor mesons in the range of 0.3 < p(T)(e) < 9.0 GeV/c have been measured at midrapidity (|y| < 0.35) by the PHENIX experiment at the Relativistic Heavy Ion Collider in p + p and Au + Au collisions at root s(NN) = 200 GeV. In addition, the azimuthal anisotropy parameter v(2) has been measured for 0.3 < p(T)(e) < 5.0 GeV/c in Au + Au collisions. The substantial modification in the p(T)(e) spectra in Au + Au compared with p + p collisions as well as the nonzero v(2) indicate substantial interactions and flow of heavy quarks in traversing the produced medium. Comparisons of these observables with detailed theoretical calculations can be used to identify the nature of these interactions and to quantify their extent.
Published: 2011

43. Cold Nuclear Matter Effects onJ/ψYields as a Function of Rapidity and Nuclear Geometry ind+ACollisions atsNN=200 GeV

Author: T. L. Thomas, V. S. Pantuev, K. S. Joo, Ryugo S. Hayano, S. Afanasiev, M. K. Dayananda, E. H. Kim, X. Jiang, J. Hamblen, A. Ster, Y. Riabov, M. Wysocki, Kenta Shigaki, N. Apadula, I. Tserruya, Yu. Efremenko, J. Newby, M. Nguyen, Tadaaki Isobe, K. Okada, B. Sahlmueller, A. Vossen, Y. Nakamiya, V. Singh, A. S. Nyanin, Dmitry Blau, Jongmin Lee, Y. Fukao, H. En'yo, P. Tarján, M. J. Leitch, Rachid Nouicer, M. Proissl, S. Esumi, O. Dietzsch, D. Sharma, P. L. McGaughey, Charles Maguire, T. Hester, K. A. Drees, C. M. Camacho, E. J. Desmond, R. Ichimiya, K. Das, E. P. Hartouni, E. T. Atomssa, H. Valle, H. A. Gustafsson, D. Hornback, G. Baksay, D. Lynch, Prashant Shukla, T. Kempel, Dong-Hun Kim, M. Chiu, S. F. Pate, M. Togawa, E. Vazquez-Zambrano, A. Glenn, Ke. Nakamura, S. N. White, Dipanwita Dutta, C. Zhang, G. S. Kyle, Deepa Thomas, P. Ružička, R. Pak, Kiyoshi Tanida, Marisilvia Donadelli, V. Bumazhnov, J. Park, Andry Malala Rakotozafindrabe, D. S. Jumper, A. Yu. Semenov, V. L. Rykov, T. Dahms, H. Al-Bataineh, B. Azmoun, A. Král, M. J. Kweon, A. Taranenko, James Alexander, Eunja Kim, Julia Velkovska, E. Kistenev, C. L. Woody, A. Berdnikov, J. Gosset, N. Kamihara, M. Gonin, Zvi Hirsh Citron, K. Nakano, Viktor Riabov, K. Watanabe, Y. Tsuchimoto, R. Tanabe, Y. Iwanaga, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, I. Ravinovich, K. Shoji, I. E. Yushmanov, Kazushi Miki, T. Horaguchi, W. E. Sondheim, D. Ivanischev, Minghui Liu, P. Lichtenwalner, M. Rosati, A. Caringi, Y. J. Kim, Jen-Chieh Peng, Kazuyoshi Kurita, V-N. Tram, N. Grau, Senta Greene, Taku Gunji, H. Gong, C. Oakley, A. Drees, J. Seele, M. Oka, D. Layton, P. A. Rukoyatkin, L. Aphecetche, V. Papavassiliou, Hongfang Liu, D. E. Fields, K. O. Eyser, A. K. Purwar, A. T. Basye, M. Heffner, Kenneth Francis Read, A. Sukhanov, H. Pereira, K. V. Dharmawardane, B. V. Jacak, M. Bai, Philippe Rosnet, P. W. Stankus, Brajesh K. Singh, T. Murakami, K. Fujiwara, T. Ichihara, Alexandre Lebedev, Y. Morino, Inkyu Park, B. Fadem, E. O'Brien, Takahiro Fusayasu, W. C. Chang, Xiong Wang, A. A. Vinogradov, Atsushi Taketani, Y. L. Yamaguchi, R. A. Soltz, H. Borel, J. T. Mitchell, Motoi Inaba, R. M. Wright, Alexei Khanzadeev, I. V. Sourikova, M. McCumber, F. Kajihara, S. Yokkaichi, P. Liebing, Tae-Yeon Lee, Martin Purschke, Z. Conesa del Valle, Jiangyong Jia, Y. Goto, Y. Tanaka, Alexander Malakhov, Dong Jo Kim, E. Stenlund, G. Grim, M. Grosse Perdekamp, D. M. Lee, D. Silvermyr, A. Dion, C. A. Ogilvie, H. Iinuma, Rushan Han, K. Karatsu, M. Kasai, A. P.T. Palounek, M. E. Connors, R. Seidl, Vladislav Manko, M. Slunečka, Zhiying You, K. B. Lee, A. V. Kazantsev, S. Sawada, R. Bennett, J. B. Choi, J. Ying, A. Franz, Johannes Peter Wessels, L. S. Zolin, M. Kawashima, Kisung Lee, Mate Csanad, A. Veicht, W. J. Park, Anne Marie Sickles, Y. Ikeda, T. K. Hemmick, J. G. Boissevain, E. J. Mannel, Christopher Rosen, K. Kiriluk, J. M. Durham, Yasuo Miake, P. D. Barnes, A. Yanovich, Aaron Angerami, J. Hanks, M. Ouchida, S. Belikov, M. Finger, S. Dairaku, W. A. Zajc, L. Tomášek, Sung Keun Park, Vladimir Samsonov, J. H. Bhom, S. Butsyk, N. Means, J. Asai, S. Tarafdar, A. Morreale, Z. Fraenkel, H. J. Moon, L. Baksay, T. Jones, N. N. Ajitanand, L. Kochenda, M. Issah, O. Zaudtke, M. Nihashi, B. Meredith, B. Komkov, V. Baublis, H. W. Van Hecke, A. Denisov, Peter Christiansen, V. Cianciolo, Alexander Milov, I. Nakagawa, T. Engelmore, Y. Tomita, T. V. Moukhanova, Sergey Fokin, D. Roach, K. M. Kijima, C. Vale, H. Qu, Shingo Sakai, M. I. Nagy, T. C. Awes, Kyoichiro Ozawa, T. Liška, H. Pei, R. Vértesi, R. K. Choudhury, David D'Enterria, C. Pinkenburg, D. Winter, Eva Haslum, D. Yu Peressounko, K. Sakashita, Norio Saito, John Hill, B. Lenzi, M. Virius, S. Zhou, Takahiro Nakamura, D. Watanabe, G. R. Young, B. S. Chang, Christine Angela Aidala, J. Klay, J. S. Bok, Jun Kikuchi, D. McGlinchey, Hideki Hamagaki, K. Aoki, A. Baldisseri, O. Drapier, Frank Ellinghaus, Tamas Ferenc Csorgo, G. David, J. L. Nagle, Toru Sugitate, M. D. Malik, Xingguo Li, M. Stepanov, G. Roche, E. R. Kinney, Y. J. Mao, R. P. Pisani, Jason Kamin, A. Kiss, Tsutomu Mibe, M. A. L. Leite, C. H. Chen, Y. Onuki, E. Vznuzdaev, Susumu Oda, Henner Buesching, Steve Edwards, S. P. Stoll, S. D. Rolnick, F. Matathias, A. Durum, J. E. Frantz, S. P. Sorensen, J. H. Kang, J. S. Haggerty, Jan Rak, O. Chvala, S. S.E. Rosendahl, R. Lacey, Kensuke Homma, E. Richardson, François Fleuret, G. Bunce, D. P. Morrison, R. Granier de Cassagnac, S. Campbell, J. L. Charvet, P. Constantin, Catherine Micaela Silvestre, Seong H. Kim, A. Hadj Henni, A. Adare, Marcus Hohlmann, K. Yamaura, J. G. Lajoie, A. Churyn, S. Chernichenko, V. E. Semenov, K. I. Hahn, B. Bassalleck, L. A. Linden Levy, P. Mikeš, D. Jouan, Beomkyu Kim, K. Boyle, Wei Xie, I. J. Choi, A. Kravitz, R. Belmont, M. Kurosawa, J. S. Kapustinsky, M. Konno, V. Babintsev, Y. S. Lai, S. Bathe, A. Enokizono, K. S. Sim, V. Dzhordzhadze, Agneta Oskarsson, Y. Kwon, Y. Berdnikov, Y. Akiba, R. Yang, M. Mishra, S. Nagamiya, P. Chung, S. Taneja, J. Imrek, Vaclav Vrba, Klaus Johannes Reygers, Tatsuya Chujo, Rui Wei, K. Imai, A. Datta, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, D. Isenhower, A. Toia, L. Mašek, T. Niita, R. S. Towell, I. Garishvili, F. Wei, C. Y. Chi, J. Jin, E. M. Takagui, C. Baumann, S. Kametani, C. P. Singh, B. M. Johnson, R. J. Petti, A. Isupov, C. Suire, J. Sziklai, Brian Cole, K. N. Barish, S. Nam, S. Sano, M. L. Brooks, B. Love, A. G. Litvinenko, A. Kozlov, R. Seto, K. Haruna, I. Danchev, X. He, Y. Aramaki, V. Peresedov, J. Koster, S. Batsouli, H. Masui, A. K. Dubey, A. A. Bickley, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, M. Naglis, Masayasu Ishihara, F. Staley, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, Maya Hachiya Shimomura, Y. I. Makdisi, M. J. Tannenbaum, H. Torii, A. Kim, D. Mukhopadhyay, S. Rembeczki, Alice Mignerey, L. D'Orazio, Takao Sakaguchi, C. Klein-Boesing, A. D. Frawley, S. Huang, and W. Holzmann
Subjects: Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Hadron, General Physics and Astronomy, Elementary particle, Quarkonium, Nuclear matter, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, 0103 physical sciences, Bound state, Rapidity, Nuclear Experiment, 010306 general physics
Abstract: We present measurements of J/psi yields in d + Au collisions at root S-NN = 200 GeV recorded by the PHENIX experiment and compare them with yields in p + p collisions at the same energy per nucleon-nucleon collision. The measurements cover a large kinematic range in J/psi rapidity (-2.2 < y < 2.4) with high statistical precision and are compared with two theoretical models: one with nuclear shadowing combined with final state breakup and one with coherent gluon saturation effects. In order to remove model dependent systematic uncertainties we also compare the data to a simple geometric model. The forward rapidity data are inconsistent with nuclear modifications that are linear or exponential in the density weighted longitudinal thickness, such as those from the final state breakup of the bound state.
Published: 2011

44. Suppression of away-side jet fragments with respect to the reaction plane in Au + Au collisions atsNN=200GeV

Author: K. Karatsu, P. Tarján, Anne Marie Sickles, Y. Fukao, T. Kempel, Dong-Hun Kim, G. R. Young, S. Sawada, Senta Greene, J. Ying, A. Franz, T. Hester, A. T. Basye, B. Azmoun, A. Král, M. J. Kweon, B. Fadem, E. O'Brien, N. A. Sparks, R. S. Towell, S. P. Sorensen, Jen-Chieh Peng, I. Garishvili, V-N. Tram, N. Grau, F. Wei, O. Chvala, Marisilvia Donadelli, V. Bumazhnov, M. Oka, M. I. Nagy, D. Watanabe, Charles Maguire, A. Dion, Andry Malala Rakotozafindrabe, Seong H. Kim, J. G. Lajoie, S. Dairaku, Atsushi Taketani, A. Enokizono, P. Liebing, Kyeongpil Lee, J. Ide, Motoi Inaba, R. M. Wright, M. D. Malik, E. Vznuzdaev, B. Meredith, R. Tanabe, D. Layton, R. A. Soltz, H. Borel, Kiyoshi Tanida, I. J. Choi, A. Kravitz, Hongfang Liu, Inkyu Park, D. E. Fields, M. Grosse Perdekamp, B. V. Jacak, Xiong Wang, M. Gonin, E. Kistenev, M. E. Connors, Dong Jo Kim, C. Y. Chi, C. M. Camacho, Prashant Shukla, John Hill, S. F. Pate, H. Al-Bataineh, M. McCumber, V. Papavassiliou, E. H. Kim, M. Rosati, X. He, K. S. Joo, Toru Sugitate, K. S. Sim, V. Dzhordzhadze, A. Sukhanov, W. C. Chang, K. A. Drees, M. Wysocki, O. Zaudtke, Y. Kwon, H. Pei, Maya Hachiya Shimomura, A. Veicht, K. Sakashita, H. Pereira, Y. Morino, A. Hadj Henni, J. Hanks, R. Yang, H. Qu, Peter Christiansen, Y. Ikeda, Y. Aramaki, D. Winter, D. Yu Peressounko, Mate Csanad, Y. I. Makdisi, I. Tserruya, Beomkyu Kim, K. Boyle, Yu. Efremenko, Wei Xie, Sung Keun Park, Rushan Han, K. Imai, V. Peresedov, V. Singh, Hideki Hamagaki, K. Aoki, J. G. Boissevain, E. J. Mannel, G. David, S. Esumi, D. Sharma, Minghui Liu, N. N. Ajitanand, R. Ichimiya, François Fleuret, J. Koster, Tae-Yeon Lee, Martin Purschke, M. Virius, Takahiro Nakamura, M. Naglis, Y. Onuki, David D'Enterria, K. Watanabe, L. Aphecetche, M. J. Tannenbaum, M. Heffner, K. B. Lee, Vladimir Samsonov, S. Batsouli, K. Shoji, Jan Rak, Jason Kamin, R. Lacey, T. Ichihara, H. Torii, R. P. Pisani, R. Granier de Cassagnac, A. Adare, Susumu Oda, H. Masui, A. K. Dubey, J. Jin, C. L. Silva, Kenneth Francis Read, A. A. Bickley, P. W. Stankus, E. M. Takagui, A. Durum, A. A. Vinogradov, D. Mukhopadhyay, S. Rembeczki, A. Morreale, Johannes Peter Wessels, S. P. Stoll, Takahiro Fusayasu, Z. Fraenkel, J. L. Charvet, C. Pinkenburg, B. Love, Catherine Micaela Silvestre, C. H. Chen, Eunja Kim, C. Baumann, S. Kametani, K. Yamaura, D. Roach, J. P. Wood, K. M. Kijima, R. K. Choudhury, Y. Tanaka, Jiangyong Jia, Y. Goto, Alexander Malakhov, K. Das, C. P. Singh, Alice Mignerey, B. M. Johnson, A. Glenn, A. G. Litvinenko, E. P. Hartouni, D. Silvermyr, S. S.E. Rosendahl, G. Bunce, Tamas Ferenc Csorgo, Masayasu Ishihara, I. Ravinovich, Alexander Milov, I. Nakagawa, R. Luechtenborg, Xingguo Li, L. Baksay, A. Isupov, C. Suire, M. Kurosawa, Takao Sakaguchi, M. Stepanov, G. Roche, L. S. Zolin, C. Klein-Boesing, Y. J. Mao, J. L. Nagle, W. J. Park, Christopher Rosen, A. Kozlov, J. Sziklai, A. D. Frawley, R. Seto, Tadaaki Isobe, K. Haruna, M. Bai, A. Churyn, T. Engelmore, S. Huang, P. D. Barnes, Brian Cole, A. Yanovich, O. Drapier, Frank Ellinghaus, I. Danchev, W. Holzmann, J. H. Kang, S. Tarafdar, S. N. White, O. Dietzsch, J. S. Haggerty, D. Jouan, Zhiying You, R. Bennett, E. T. Atomssa, H. Valle, M. Kawashima, Dipanwita Dutta, E. R. Kinney, K. N. Barish, Julia Velkovska, M. Finger, D. P. Morrison, S. Campbell, P. Chung, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, Jongmin Lee, P. A. Rukoyatkin, D. Lynch, F. Staley, J. Imrek, D. S. Jumper, V. L. Rykov, T. Dahms, V. E. Semenov, Y. S. Lai, S. Sano, B. Komkov, C. A. Ogilvie, Tatsuya Chujo, D. Kawall, Kisung Lee, T. K. Hemmick, A. Datta, H. Themann, J. M. Durham, M. L. Brooks, Yasuo Miake, Taku Gunji, H. Gong, J. Seele, P. L. McGaughey, Norio Saito, Eva Haslum, B. Lenzi, F. Kajihara, L. Kochenda, M. Issah, J. Murata, M. A. L. Leite, S. Afanasiev, A. Ster, S. Butsyk, M. Chiu, Gerd Joachim Kunde, I. Shein, J. Newby, R. Pak, S. Zhou, A. Baldisseri, S. D. Rolnick, N. Kamihara, K. Sedgwick, D. Hornback, A. Deshpande, Kazuyoshi Kurita, A. V. Kazantsev, A. Drees, Ajit Kumar Mohanty, A. Taranenko, T. A. Shibata, Kazushi Miki, T. Horaguchi, T. Sato, Brajesh K. Singh, Y. Watanabe, I. Younus, L. Tomášek, A. Soldatov, P. Mikeš, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, Jun Kikuchi, D. Isenhower, A. Toia, L. Mašek, H. Iinuma, T. Niita, A. P.T. Palounek, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, Y. Tomita, Sergey Fokin, H. A. Gustafsson, C. Zhang, P. Ružička, Viktor Riabov, C. L. Woody, A. Berdnikov, I. V. Sourikova, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, J. Park, Y. Tsuchimoto, M. Ouchida, N. Means, J. Asai, I. E. Yushmanov, Alexei Khanzadeev, Shingo Sakai, E. Stenlund, T. L. Thomas, Y. Nakamiya, Ryugo S. Hayano, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, Rachid Nouicer, M. Proissl, G. Baksay, T. V. Moukhanova, R. Vértesi, J. E. Frantz, Y. J. Kim, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, S. Chernichenko, K. I. Hahn, K. O. Eyser, A. K. Purwar, K. Fujiwara, B. Bassalleck, M. Konno, Y. L. Yamaguchi, J. T. Mitchell, E. Leitner, R. Seidl, Vladislav Manko, M. Slunečka, A. Yu. Semenov, J. Gosset, S. Belikov, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, S. Yokkaichi, H. W. Van Hecke, R. Belmont, J. S. Kapustinsky, V. Babintsev, G. S. Kyle, James Alexander, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, D. Kotchetkov, Philippe Rosnet, V. S. Pantuev, Alexandre Lebedev, J. Hamblen, D. M. Lee, S. Bathe, K. Okada, B. Sahlmueller, H. En'yo, Agneta Oskarsson, M. J. Leitch, K. Kiriluk, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, A. Kiss, Henner Buesching, Steve Edwards, Marcus Hohlmann, and L. A. Linden Levy
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Jet (fluid), Meson, 010308 nuclear & particles physics, Hadron, Parton, Elementary particle, 01 natural sciences, Nuclear physics, Momentum, Pion, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: Pair correlations between large transverse momentum neutral pion triggers (p(T) = 4-7 GeV/c) and charged hadron partners (p(T) = 3-7 GeV/c) in central (0%-20%) and midcentral (20%-60%) Au + Au collisions at root s(NN) = 200 GeV are presented as a function of trigger orientation with respect to the reaction plane. The particles are at larger momentum than where jet shape modifications have been observed, and the correlations are sensitive to the energy loss of partons traveling through hot densematter. An out-of-plane trigger particle produces only 26 +/- 20% of the away-side pairs that are observed opposite of an in-plane trigger particle for midcentral (20%-60%) collisions. In contrast, near-side jet fragments are consistent with no suppression or dependence on trigger orientation with respect to the reaction plane. These observations are qualitatively consistent with a picture of little near-side parton energy loss either due to surface bias or fluctuations and increased away-side parton energy loss due to a long path through the medium. The away-side suppression as a function of reaction-plane angle is shown to be sensitive to both the energy loss mechanism and the space-time evolution of heavy-ion collisions.
Published: 2011

45. Event structure and double helicity asymmetry in jet production from polarizedp+pcollisions ats=200 GeV

Author: Maya Hachiya Shimomura, J. H. Kang, J. S. Haggerty, A. Romana, R. Pak, N. Kamihara, Y. I. Makdisi, Y. Nakamiya, G. Baksay, R. Armendariz, Kazuyoshi Kurita, A. Drees, J. L. Charvet, J. Kubart, E. H. Kim, Y. S. Lai, M. J. Tannenbaum, T. E. Miller, D. Mukhopadhyay, R. A. Soltz, John Hill, C. A. Ogilvie, Herve Borel, D. Lynch, S. Rembeczki, X. He, O. O. Omiwade, T. K. Hemmick, M. Grosse Perdekamp, S. P. Sorensen, H. A. Torii, Yasuo Miake, Dylan Walker, Toru Sugitate, L. D. Isenhower, J. Gosset, P. Chung, V. Peresedov, L. Kochenda, S. Yokkaichi, M. Rosati, J. G. Boissevain, Masashi Kaneta, V. L. Rykov, T. Dahms, Charles Maguire, S. Butsyk, A. Kiss, Vladimir Samsonov, L. Aphecetche, C. Pinkenburg, W. S. Emam, H. Kanou, M. Stepanov, G. Roche, Taku Gunji, H. Gong, J. Seele, R. Vértesi, A. V. Kazantsev, F. Kajihara, Z. Yasin, Henner Buesching, S. Batsouli, H. Masui, A. K. Dubey, H. Delagrange, J. Chiba, N. N. Ajitanand, A. A. Bickley, K. Dehmelt, C. R. Cleven, C. Haegemann, Y. Inoue, A. A. Vinogradov, S. Afanasiev, François Fleuret, B. Love, Marcus Hohlmann, V. S. Pantuev, S. Zhou, J. G. Lajoie, T. Hachiya, I. J. Choi, A. Kravitz, D. Winter, D. Yu Peressounko, S. F. Pate, A. Ster, J. Egdemir, Jason Kamin, Jiangyong Jia, Y. Goto, Kiyoshi Tanida, E. Kistenev, J. T. Mitchell, A. G. Litvinenko, R. Seidl, Vladislav Manko, P. MikeÅ, Takao Sakaguchi, Dong-Hun Kim, M. Slunečka, Y. L. Yamaguchi, B. Komkov, Johannes Peter Wessels, S. N. White, Tamas Ferenc Csorgo, A. Hadj Henni, J. L. Nagle, M. Gonin, Jen-Chieh Peng, Jan Rak, R. Lacey, P. Tarján, H. Al-Bataineh, Takahiro Nakamura, S. P. Stoll, J. Newby, O. Zaudtke, S. Belikov, C. Klein-Boesing, Junji Tojo, Mate Csanad, K. Boyle, M. Ouchida, Norio Saito, C. Silvestre, M. A. L. Leite, H. Harada, H. Pereira, K. Nakano, J. Asai, A. Kozlov, M. Virius, R. Seto, N. Grau, Wei Xie, R. Granier de Cassagnac, A. Adare, D. Hornback, Xiong Wang, C. Vale, B. S. Chang, J. E. Frantz, K. Haruna, A. Taranenko, S. S.E. Rosendahl, Susumu Oda, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, T. A. Shibata, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, Kazushi Miki, W. E. Sondheim, K. Okada, Senta Greene, Dong Jo Kim, M. B. Deaton, Y. Tanaka, Hiroaki Ohnishi, V. Papavassiliou, Sébastien Gadrat, Christine Angela Aidala, J. Klay, B. Sahlmueller, H. En'yo, D. Isenhower, A. Toia, P. A. Rukoyatkin, T. Ichihara, Osamu Jinnouchi, A. D. Frawley, T. Tabaru, S. H. Aronson, Shingo Sakai, T. L. Thomas, Alexei Khanzadeev, E. Stenlund, H. Sakata, S. Takagi, B. E. Norman, K. N. Barish, E. O'Brien, Matthew G. Reuter, Takahiro Fusayasu, F. Matathias, K. Das, E. P. Hartouni, M. J. Leitch, A. Durum, K. Shoji, Ryugo S. Hayano, K. O. Eyser, A. K. Purwar, K. Fujiwara, Kensuke Homma, P. W. Stankus, Sergey Fokin, T. C. Awes, Y. Riabov, Kyoichiro Ozawa, Kenta Shigaki, F. Staley, L. Baksay, Rushan Han, V. Babintsev, T. Horaguchi, Jun Kikuchi, Eva Haslum, B. Lenzi, Alexander Malakhov, D. Silvermyr, Alexander Milov, A. Glenn, I. Ravinovich, M. Nguyen, I. Nakagawa, P. Constantin, Steven E. Skutnik, W. Holzmann, H. Pei, M. Mitrovski, L. S. Zolin, W. J. Park, David D'Enterria, A. S. Nyanin, S. Chernichenko, Rachid Nouicer, M. Issah, Y. Nagata, O. Drapier, Frank Ellinghaus, G. S. Kyle, O. Dietzsch, K. S. Sim, V. Dzhordzhadze, E. R. Kinney, E. T. Atomssa, M. K. Lee, Y. Kwon, Xingguo Li, D. P. Morrison, S. Campbell, B. Bassalleck, C. L. Woody, M. Wysocki, H. W. Van Hecke, H. Valle, M. D. Malik, L. TomáÅek, P. D. Barnes, E. Vznuzdaev, A. Yanovich, H. Qu, D. E. Fields, James Alexander, B. V. Jacak, V. E. Semenov, M. Konno, J. Zimányi, H. Hiejima, Tatsuya Chujo, I. Tserruya, R. Averbeck, Robert F. Hobbs, Byung-Sik Hong, T. V. Moukhanova, Yu. Efremenko, S. Bathe, H. Iinuma, V. Singh, Agneta Oskarsson, A. Bazilevsky, Minghui Liu, Hideki Hamagaki, K. Aoki, Julia Velkovska, Y. Berdnikov, G. David, A. P.T. Palounek, M. McCumber, M. N. Wagner, Philippe Rosnet, Y. Akiba, M. Mishra, S. Nagamiya, I. V. Sourikova, E. J. Desmond, Y. Fukao, A. Shevel, Debashish Pal, M. L. Brooks, K. Imai, S. Sawada, Vaclav Vrba, Klaus Johannes Reygers, T. Hester, J. Ying, A. Franz, Alexandre Lebedev, H. A. Gustafsson, M. Togawa, C. Zhang, D. M. Lee, J. Park, V-N. Tram, M. Heffner, Anne Marie Sickles, Kenneth Francis Read, Motoi Inaba, Viktor Riabov, Y. Tsuchimoto, I. E. Yushmanov, G. R. Young, Tadaaki Isobe, R. Bennett, P. L. McGaughey, M. Chiu, M. Finger, B. Azmoun, A. Král, M. J. Kweon, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, K. S. Joo, T. LiÅka, S. Esumi, D. Sharma, Tae-Yeon Lee, Martin Purschke, D. Kotchetkov, A. Morreale, Z. Fraenkel, G. Bunce, A. Churyn, D. Jouan, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, M. Naglis, C. L. Silva, Masayasu Ishihara, Susumu Sato, D. Kawall, V. I. Kochetkov, J. Murata, Gerd Joachim Kunde, I. Shein, Alberto Baldisseri, C. P. Singh, B. M. Johnson, A. Isupov, C. Suire, J. Sziklai, Brian Cole, L. MaÅek, Saskia Mioduszewski, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, Akio Kiyomichi, N. Kurihara, C. Y. Chi, Y. J. Mao, and S. Kametani
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Photon, 010308 nuclear & particles physics, media_common.quotation_subject, Lambda, 01 natural sciences, 7. Clean energy, Helicity, Asymmetry, Charged particle, Gluon, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Event generator, media_common
Abstract: We report on the event structure and double helicity asymmetry (A(LL)) of jet production in longitudinally polarized p + p collisions at root s = 200 GeV. Photons and charged particles were measured by the PHENIX experiment at midrapidity vertical bar eta vertical bar 2 GeV/c) photon in the event. Event structure, such as multiplicity, p(T) density and thrust in the PHENIX acceptance, were measured and compared with the results from the PYTHIA event generator and the GEANT detector simulation. The shape of jets and the underlying event were well reproduced at this collision energy. For the measurement of jet A(LL), photons and charged particles were clustered with a seed-cone algorithm to obtain the cluster pT sum (p(T)(reco)). The effect of detector response and the underlying events on p(T)(reco) was evaluated with the simulation. The production rate of reconstructed jets is satisfactorily reproduced with the next-to-leading-order and perturbative quantum chromodynamics jet production cross section. For 4 = 49% we measured Lambda(LL) = -0.0014 +/- 0.0037(stat) at the lowest p(T)(reco) bin (4-5 GeV= c) and -0.0181 +/- 0.0282(stat) at the highest p(T)(reco) bin (10-12 GeV= c) with a beam polarization scale error of 9.4% and a pT scale error of 10%. Jets in the measured p(T)(reco) range arise primarily from hard-scattered gluons with momentum fraction 0: 02 < x < 0: 3 according to PYTHIA. The measured A(LL) is compared with predictions that assume various Delta G(x) distributions based on the Gluck-Reya-Stratmann-Vogelsang parameterization. The present result imposes the limit -a.1 < integral(0.3)(0.02) dx Delta G(x, mu(2) = GeV2) < 0.4 at 95% confidence level or integral(0.3)(0.002) dx Delta G(x, mu(2) = 1 GeV2) < 0.5 at 99% confidence level.
Published: 2011

46. Identified charged hadron production inp+pcollisions ats=200and 62.4 GeV

Author: S. Bathe, K. S. Sim, V. Dzhordzhadze, Y. L. Yamaguchi, B. Komkov, Agneta Oskarsson, L. Aphecetche, Y. Kwon, Mate Csanad, Y. Berdnikov, Y. Akiba, Norio Saito, Hiroaki Ohnishi, K. B. Lee, R. Yang, M. A. L. Leite, H. Hiejima, M. Rosati, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Alexander Milov, I. Nakagawa, T. Engelmore, K. Imai, M. Ouchida, J. S. Kapustinsky, S. N. White, V. Babintsev, N. Means, Johannes Peter Wessels, J. Asai, V. S. Pantuev, Y. Ikeda, C. M. Camacho, Tae-Yeon Lee, A. A. Vinogradov, D. Roach, K. M. Kijima, Martin Purschke, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, David D'Enterria, C. Baumann, H. Pei, J. G. Boissevain, E. J. Mannel, S. Afanasiev, A. Ster, Prashant Shukla, S. F. Pate, Masashi Kaneta, Zvi Hirsh Citron, R. A. Soltz, Shingo Sakai, H. Liu, Anne Marie Sickles, K. O. Eyser, A. K. Purwar, K. Fujiwara, Jiangyong Jia, Y. Goto, C. P. Singh, H. Iinuma, A. P.T. Palounek, D. Kotchetkov, K. Nakano, B. M. Johnson, V. E. Semenov, J. Zimányi, J. Newby, K. A. Drees, Maya Hachiya Shimomura, Xingguo Li, M. Naglis, C. L. Silva, H. Al-Bataineh, A. Morreale, W. A. Zajc, K. Shoji, M. I. Nagy, M. Issah, V. Baublis, A. Denisov, Y. Tomita, T. L. Thomas, Junji Tojo, I. Ravinovich, E. H. Kim, Tatsuya Chujo, W. E. Sondheim, D. Ivanischev, Sergey Fokin, M. Gonin, A. Isupov, C. Suire, Z. Fraenkel, I. Tserruya, R. Pak, Yu. Efremenko, C. Pinkenburg, Y. I. Makdisi, N. Kamihara, P. A. Rukoyatkin, P. W. Stankus, Masayasu Ishihara, M. D. Malik, E. Vznuzdaev, M. Grosse Perdekamp, D. E. Fields, H. A. Gustafsson, J. Sziklai, C. Zhang, M. N. Wagner, R. Vértesi, R. K. Choudhury, Y. Nagata, V. Singh, M. Bai, B. V. Jacak, Ryugo S. Hayano, G. R. Young, K. S. Joo, Brian Cole, D. Hornback, Y. Riabov, A. Sukhanov, H. Pereira, M. Stepanov, Susumu Sato, G. Roche, Y. J. Mao, S. Butsyk, S. Kametani, T. Horaguchi, B. Meredith, Y. Morino, P. Ružička, K. Okada, H. Hamagaki, R. S. Towell, A. Hadj Henni, Minghui Liu, Vladimir Samsonov, Viktor Riabov, R. Armendariz, Kenta Shigaki, Y. Fukao, A. Shevel, M. Nguyen, M. McCumber, I. Garishvili, Akio Kiyomichi, F. Wei, Y. Onuki, T. Hester, A. Taranenko, D. Kawall, H. Themann, H. W. Van Hecke, M. J. Tannenbaum, John Hill, J. H. Kang, J. S. Haggerty, V. I. Kochetkov, Beomkyu Kim, K. Boyle, Jan Rak, Ajit Kumar Mohanty, Wei Xie, T. A. Shibata, R. Hobbs, N. Kurihara, B. Sahlmueller, Kazushi Miki, M. Heffner, A. S. Nyanin, Kenneth Francis Read, H. En'yo, M. J. Leitch, Rachid Nouicer, G. S. Kyle, James Alexander, R. Lacey, Toru Sugitate, L. D. Isenhower, Kazuyoshi Kurita, A. Drees, A. Romana, J. Murata, H. Torii, Gerd Joachim Kunde, S. Esumi, D. Sharma, R. Granier de Cassagnac, A. Adare, O. Dietzsch, Steven E. Skutnik, R. Bennett, Brajesh K. Singh, C. Y. Chi, E. T. Atomssa, M. B. Deaton, T. Sato, J. E. Frantz, M. Finger, S. Dairaku, A. V. Kazantsev, K. Das, R. Averbeck, Byung-Sik Hong, H. Valle, C. L. Woody, A. Berdnikov, A. Bazilevsky, Philippe Rosnet, R. Ichimiya, Tamas Ferenc Csorgo, K. Dehmelt, D. Mukhopadhyay, I. Shein, S. Rembeczki, Y. Tanaka, J. Kubart, Dipanwita Dutta, K. Sakashita, O. Zaudtke, V. Cianciolo, H. Qu, S. P. Sorensen, Alexandre Lebedev, Jen-Chieh Peng, Alexei Khanzadeev, Dylan Walker, M. Virius, E. P. Hartouni, V-N. Tram, N. Grau, D. M. Lee, L. Tomášek, François Fleuret, A. Kiss, J. L. Nagle, P. Mikeš, B. Azmoun, K. Sedgwick, Alberto Baldisseri, A. Král, F. Matathias, A. Deshpande, M. J. Kweon, E. Stenlund, H. Sakata, Y. S. Lai, Julia Velkovska, N. N. Ajitanand, Takahiro Nakamura, K. Aoki, K. Kiriluk, G. David, J. Egdemir, Z. Yasin, D. Winter, Motoi Inaba, I. V. Sourikova, Xiong Wang, Saskia Mioduszewski, J. Chiba, Y. Watanabe, Seong H. Kim, T. Ichihara, M. Oka, A. Yu. Semenov, Dong Jo Kim, J. G. Lajoie, T. Hachiya, D. Yu Peressounko, Susumu Oda, Jason Kamin, Osamu Jinnouchi, Henner Buesching, S. P. Stoll, A. Glenn, S. Gadrat, C. Silvestre, Kensuke Homma, T. C. Awes, A. Dion, Kyoichiro Ozawa, T. Liška, I. Younus, Takao Sakaguchi, Matthew G. Reuter, Takahiro Fusayasu, J. Gosset, A. Durum, A. Veicht, C. Klein-Boesing, F. Staley, L. Baksay, Eva Haslum, B. Lenzi, P. Tarján, T. V. Moukhanova, C. R. Cleven, C. Haegemann, Y. Inoue, S. S.E. Rosendahl, G. Bunce, Alexander Malakhov, Herve Borel, D. Lynch, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Charles Maguire, Jun Kikuchi, Tadaaki Isobe, I. J. Choi, A. Soldatov, Atsushi Taketani, A. Enokizono, P. Liebing, A. Kravitz, J. Jin, E. M. Takagui, A. D. Frawley, T. Tabaru, Marcus Hohlmann, Andry Malala Rakotozafindrabe, D. Silvermyr, K. Yamaura, D. Isenhower, A. Toia, A. Churyn, E. J. Desmond, V. L. Rykov, T. Dahms, R. Tanabe, D. Layton, S. Huang, S. H. Aronson, P. L. McGaughey, M. Togawa, L. S. Zolin, W. J. Park, J. Park, S. Yokkaichi, T. Kempel, Dong-Hun Kim, Kiyoshi Tanida, E. Kistenev, P. D. Barnes, A. Yanovich, L. Mašek, D. Jouan, W. Holzmann, M. K. Lee, P. Constantin, S. Chernichenko, Y. Tsuchimoto, W. C. Chang, M. Chiu, H. Harada, I. E. Yushmanov, Rushan Han, C. A. Ogilvie, Senta Greene, T. K. Hemmick, B. Bassalleck, Yasuo Miake, A. T. Basye, B. E. Norman, T. Niita, B. Fadem, E. O'Brien, M. Konno, L. Kochenda, H. Kanou, Taku Gunji, H. Gong, J. T. Mitchell, J. Seele, F. Kajihara, R. Seidl, Vladislav Manko, M. Slunečka, H. Delagrange, S. Belikov, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, Y. Nakamiya, S. Zhou, G. Baksay, S. D. Rolnick, J. L. Charvet, T. E. Miller, M. Kurosawa, P. Chung, J. Imrek, W. S. Emam, V. Papavassiliou, Debashish Pal, S. Sawada, J. Ying, A. Franz, M. Mitrovski, M. Wysocki, S. Takagi, K. N. Barish, M. L. Brooks, B. Love, A. G. Litvinenko, A. Kozlov, R. Seto, K. Haruna, X. He, O. O. Omiwade, V. Peresedov, J. Koster, S. Batsouli, H. Masui, A. K. Dubey, and A. A. Bickley
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Hadron, 7. Clean energy, 01 natural sciences, Nuclear physics, Baryon, Pion, Antimatter, 0103 physical sciences, Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Nucleon
Abstract: Transverse momentum distributions and yields for pi(+/-), K-+/-, p, and (p) over bar in p + p collisions at root s = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). These data provide important baseline spectra for comparisons with identified particle spectra in heavy ion collisions at RHIC. We present the inverse slope parameter T-inv, mean transverse momentum , and yield per unit rapidity dN/dy at each energy, and compare them to other measurements at different root s in p + p and p + (p) over bar collisions. We also present the scaling properties such as m(T) scaling and x(T) scaling on the p(T) spectra between different energies. To discuss the mechanism of the particle production in p + p collisions, the measured spectra are compared to next-to-leading-order or next-to-leading-logarithmic perturbative quantum chromodynamics calculations.
Published: 2011

47. Measurement of neutral mesons inp+pcollisions ats=200 GeVand scaling properties of hadron production

Author: X. He, O. O. Omiwade, L. Aphecetche, K. Sakashita, P. Tarján, V. Peresedov, C. L. Woody, A. Berdnikov, J. Egdemir, Jason Kamin, T. Csörgő, S. P. Stoll, W. A. Zajc, J. Koster, V. S. Pantuev, Senta Greene, V. Baublis, A. Denisov, S. S.E. Rosendahl, Johannes Peter Wessels, V. Cianciolo, Y. Tomita, G. Bunce, A. T. Basye, Maya Hachiya Shimomura, M. Rosati, B. Meredith, Sergey Fokin, I. V. Sourikova, E. H. Kim, B. E. Norman, B. Fadem, E. O'Brien, J. T. Mitchell, A. Churyn, A. V. Kazantsev, S. Batsouli, H. Masui, A. K. Dubey, C. Baumann, Junji Tojo, Anne Marie Sickles, C. P. Singh, D. Jouan, B. M. Johnson, A. Isupov, Y. I. Makdisi, M. B. Deaton, J. Sziklai, Brian Cole, John Hill, R. Seidl, A. A. Bickley, R. A. Soltz, K. Okada, Toru Sugitate, L. D. Isenhower, A. Hadj Henni, M. Grosse Perdekamp, B. Sahlmueller, Y. Tanaka, H. En'yo, G. R. Young, S. Takagi, Vladislav Manko, M. J. Leitch, M. J. Tannenbaum, Beomkyu Kim, K. Boyle, Wei Xie, H. A. Gustafsson, M. Ouchida, M. Slunečka, Mate Csanad, N. Means, J. Asai, K. N. Barish, C. A. Ogilvie, G. S. Kyle, H. Torii, François Fleuret, I. Tserruya, C. Zhang, T. K. Hemmick, James Alexander, Yu. Efremenko, M. Mitrovski, P. Ružička, D. Winter, Yasuo Miake, D. Mukhopadhyay, S. Rembeczki, R. Averbeck, Byung-Sik Hong, K. S. Sim, A. Bazilevsky, T. Ichihara, S. Belikov, L. Tomášek, D. Yu Peressounko, P. Mikeš, A. A. Vinogradov, Viktor Riabov, V. Dzhordzhadze, Y. Kwon, Matthew G. Reuter, Philippe Rosnet, Hiroaki Ohnishi, K. B. Lee, Takahiro Fusayasu, Shingo Sakai, K. A. Drees, T. L. Thomas, F. Staley, L. Baksay, V. Singh, S. Bathe, H. Pei, Alexander Malakhov, L. Kochenda, R. Yang, M. Wysocki, H. Hiejima, M. L. Brooks, H. Iinuma, J. Chiba, Ryugo S. Hayano, Y. Riabov, I. Ravinovich, Takao Sakaguchi, B. Azmoun, A. Král, M. J. Kweon, Agneta Oskarsson, M. K. Lee, Alexandre Lebedev, D. M. Lee, K. Kiriluk, Y. L. Yamaguchi, B. Komkov, Y. Berdnikov, Jiangyong Jia, Y. Goto, B. Love, Robert F. Hobbs, Y. Akiba, C. Klein-Boesing, M. I. Nagy, A. P.T. Palounek, R. Pak, N. Kamihara, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, M. Issah, Kenta Shigaki, M. Nguyen, M. Mishra, S. Nagamiya, A. D. Frawley, T. Tabaru, K. Imai, Norio Saito, M. D. Malik, E. Vznuzdaev, R. Armendariz, M. A. L. Leite, F. Matathias, K. Das, E. P. Hartouni, David D'Enterria, Vaclav Vrba, Klaus Johannes Reygers, A. G. Litvinenko, S. Huang, Kensuke Homma, R. Vértesi, A. S. Nyanin, S. H. Aronson, Kazuyoshi Kurita, T. C. Awes, Kyoichiro Ozawa, T. Liška, Y. Onuki, K. O. Eyser, A. K. Purwar, K. Fujiwara, J. S. Kapustinsky, P. Constantin, S. Chernichenko, D. Roach, Y. Nagata, A. Drees, W. Holzmann, K. M. Kijima, C. R. Cleven, M. Oka, V. Babintsev, Jun Kikuchi, Jan Rak, Rachid Nouicer, B. Bassalleck, C. Haegemann, Y. Inoue, A. Dion, A. Kozlov, J. Kubart, R. Lacey, Ajit Kumar Mohanty, M. Bai, Debashish Pal, M. Konno, R. Seto, K. Haruna, S. Sawada, R. Granier de Cassagnac, T. A. Shibata, A. Adare, T. Sato, J. E. Frantz, Atsushi Taketani, A. Enokizono, Y. Nakamiya, P. Liebing, M. N. Wagner, Y. Fukao, J. Ying, A. Franz, H. W. Van Hecke, A. Shevel, Charles Maguire, Xingguo Li, Alexei Khanzadeev, Tae-Yeon Lee, G. Baksay, K. Dehmelt, E. Stenlund, Martin Purschke, H. Sakata, T. Hester, Kiyoshi Tanida, A. Kiss, O. Dietzsch, Jen-Chieh Peng, E. Kistenev, Z. Yasin, Henner Buesching, E. T. Atomssa, H. Valle, S. P. Sorensen, Dylan Walker, Dipanwita Dutta, D. Isenhower, T. V. Moukhanova, C. M. Camacho, D. Kotchetkov, Marcus Hohlmann, Prashant Shukla, A. Toia, E. J. Desmond, H. Harada, A. Morreale, Julia Velkovska, V-N. Tram, N. Grau, S. F. Pate, Minghui Liu, L. Mašek, Seong H. Kim, D. E. Fields, M. Togawa, J. Park, T. Kempel, Dong-Hun Kim, Xiong Wang, B. V. Jacak, Z. Fraenkel, Motoi Inaba, M. Heffner, J. G. Lajoie, Y. Tsuchimoto, T. Hachiya, R. Bennett, T. Niita, Dong Jo Kim, Osamu Jinnouchi, Kenneth Francis Read, I. E. Yushmanov, H. Al-Bataineh, I. J. Choi, A. Kravitz, M. McCumber, R. K. Choudhury, Tadaaki Isobe, M. Gonin, K. S. Joo, J. L. Charvet, V. Papavassiliou, M. Finger, Sébastien Gadrat, A. Veicht, P. L. McGaughey, A. Sukhanov, H. Pereira, M. Chiu, Y. Morino, T. E. Miller, M. Kurosawa, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, S. Esumi, N. N. Ajitanand, E. R. Kinney, Herve Borel, D. P. Morrison, S. Campbell, D. Lynch, D. Sharma, V. E. Semenov, J. Zimányi, R. Ichimiya, Tatsuya Chujo, P. Chung, Eva Haslum, B. Lenzi, Steven E. Skutnik, J. Imrek, V. L. Rykov, T. Dahms, Takahiro Nakamura, S. Dairaku, W. S. Emam, S. Afanasiev, O. Zaudtke, Susumu Oda, A. Ster, H. Kanou, Taku Gunji, H. Gong, J. Seele, M. Virius, F. Kajihara, J. Newby, H. Delagrange, A. Durum, K. Yamaura, S. Zhou, A. Glenn, S. D. Rolnick, D. Hornback, H. Qu, A. Taranenko, Kazushi Miki, Hideki Hamagaki, K. Aoki, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, G. David, Brajesh K. Singh, H. Liu, S. N. White, K. Shoji, Zvi Hirsh Citron, K. Nakano, P. W. Stankus, W. E. Sondheim, D. Ivanischev, Saskia Mioduszewski, P. A. Rukoyatkin, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, Akio Kiyomichi, F. Wei, N. Kurihara, C. Y. Chi, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Masashi Kaneta, C. Pinkenburg, M. Stepanov, G. Roche, Y. J. Mao, S. Kametani, T. Horaguchi, J. H. Kang, J. S. Haggerty, A. Romana, Y. S. Lai, A. Yu. Semenov, J. Gosset, S. Butsyk, Vladimir Samsonov, S. Yokkaichi, J. L. Nagle, C. Silvestre, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, R. Tanabe, D. Layton, W. C. Chang, Rushan Han, D. Kawall, H. Themann, V. I. Kochetkov, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, Alberto Baldisseri, M. Naglis, C. L. Silva, Masayasu Ishihara, Susumu Sato, A. Deshpande, Y. Watanabe, I. Younus, and A. Soldatov
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Hadron, Omega baryon, 01 natural sciences, 7. Clean energy, Omega, Nuclear physics, Baryon, Particle decay, 0103 physical sciences, Tsallis distribution, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the invariant differential cross section for production of K-S(0), omega, eta', and phi mesons in p + p collisions at root s 200 GeV. Measurements of omega and phi production in different decay channels give consistent results. New results for the omega are in agreement with previously published data and extend the measured p(T) coverage. The spectral shapes of all hadron transverse momentum distributions measured by PHENIX 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 of the spectra, respectively. The values of these parameters are very similar for all analyzed meson spectra, but with a lower parameter T extracted for protons. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.
Published: 2011

48. Cross Section and Parity-Violating Spin Asymmetries ofW±Boson Production in Polarizedp+pCollisions ats=500 GeV

Author: M. Kasai, A. Deshpande, B. Meredith, Alice Mignerey, John Hill, Toru Sugitate, L. D'Orazio, M. Sarsour, Mate Csanad, François Fleuret, D. Watanabe, A. Iordanova, T. Ichihara, Takahiro Fusayasu, Alexander Malakhov, D. Silvermyr, L. S. Zolin, A. Yanovich, Takao Sakaguchi, M. Mendoza, S. N. White, E. Vznuzdaev, Y. J. Kwon, Deepa Thomas, Marisilvia Donadelli, V. Bumazhnov, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, D. Kotov, Dmitry Blau, E. J. Desmond, M. Ouchida, N. Means, A. D. Frawley, M. Nihashi, Alexander Milov, I. Nakagawa, Atsushi Takahara, Aaron Angerami, Hongfang Liu, R. Tanabe, Young-Ki Kim, T. Engelmore, T. Murakami, D. E. Fields, B. Love, J. S. Kang, K. A. Drees, S. Huang, Y. L. Yamaguchi, Y. Watanabe, Jason Kamin, M. Togawa, E. Vazquez-Zambrano, W. A. Zajc, M. Rosati, K. B. Lee, B. V. Jacak, R. S. Towell, I. Ravinovich, Y. Ikeda, V. Baublis, I. Younus, S. P. Stoll, A. Denisov, C. Harper, E. J. Mannel, E. R. Kinney, V. Cianciolo, T. Kempel, D. P. Morrison, A. G. Litvinenko, W. Holzmann, S. Kaneti, H. Pei, S. Campbell, S. Sawada, Y. Miyachi, Y. Tsuchimoto, Sergey Fokin, Y. Iwanaga, B. H. Kang, I. Garishvili, T. Csörgő, F. Wei, R. P. Pisani, M. Bai, V. S. Pantuev, J. Ying, A. Franz, S. S.E. Rosendahl, G. Bunce, Rushan Han, A. Dion, M. I. Nagy, Maya Hachiya Shimomura, R. S. Hollis, I. E. Yushmanov, M. Kurosawa, H. W. Van Hecke, A. Enokizono, H. Al-Ta'Ani, Tatsuya Chujo, B. Azmoun, A. Král, Jiangyong Jia, Y. Goto, Y. I. Makdisi, R. Akimoto, Johannes Peter Wessels, E. C. Aschenauer, M. McCumber, I. Tserruya, J. Hamblen, Vladimir Samsonov, M. Naglis, R. Seto, Senta Greene, D. Roach, D. Jouan, C. L. Woody, A. Berdnikov, Yu. Efremenko, Prashant Shukla, K. V. Dharmawardane, P. L. McGaughey, K. M. Kijima, H. Qu, V. Singh, M. Gonin, C. Pinkenburg, A. T. Basye, A. Kiss, S. F. Pate, A. Caringi, C. Y. Chi, Hideki Hamagaki, K. Aoki, G. David, Ke. Nakamura, K. S. Sim, B. Fadem, E. O'Brien, M. Chiu, K. Hashimoto, A. Datta, D. Kleinjan, Eric Appelt, M. J. Tannenbaum, K. R. Andrews, R. A. Soltz, K. Okada, Beomkyu Kim, O. Drapier, B. Sahlmueller, Y. Fukao, Henner Buesching, H. Iinuma, C. A. Ogilvie, Xingguo Li, Zhiying You, R. Yang, R. Bennett, R. Armendariz, Kisung Lee, T. K. Hemmick, Ajit Kumar Mohanty, Y. J. Mao, H. Torii, M. Grosse Perdekamp, H. En'yo, Masayasu Ishihara, J. Hanks, K. N. Barish, Sung Keun Park, M. J. Leitch, T. Hester, J. M. Durham, M. E. Connors, Yasuo Miake, K. Watanabe, Yosuke Watanabe, T. A. Shibata, C. L. Silva, S. P. Sorensen, S. Taneja, K. Shoji, T. Sato, A. V. Kazantsev, E. Tennant, L. Guo, J. L. Nagle, P. Castera, Alexei Khanzadeev, M. Finger, S. Dairaku, N. N. Ajitanand, X. Gong, L. Kochenda, M. Issah, A. Glenn, I. V. Sourikova, K. Imai, E. Stenlund, S. Sano, J. H. Kang, J. S. Haggerty, S. R. Lee, J. B. Choi, O. Chvala, I. J. Choi, P. W. Stankus, L. A. Linden Levy, D. Kawall, Eunja Kim, M. Savastio, L. Tomášek, S. Motschwiller, H. A. Gustafsson, D. Isenhower, Jan Rak, R. Lacey, Takahiro Nakamura, V. Papavassiliou, K. Utsunomiya, Jen-Chieh Peng, R. Pak, J. G. Lajoie, T. Jones, Ryugo S. Hayano, R. Granier de Cassagnac, Peter Christiansen, H. Themann, M. L. Brooks, Y. Riabov, A. Adare, D. McGlinchey, Agneta Oskarsson, D. Winter, J. E. Frantz, X. He, Kenta Shigaki, M. Virius, Charles Maguire, D. Yu Peressounko, Y. Berdnikov, Y. Akiba, C. McKinney, M. Nguyen, Inkyu Park, Y. Aramaki, V. Peresedov, N. Grau, Xiong Wang, Robert Vertesi, E. M. Takagui, Byoungchoo Park, Kazuyoshi Kurita, Taku Gunji, Z. Conesa del Valle, T. V. Moukhanova, O. Dietzsch, J. Murata, C. Baumann, K. Karatsu, A. Durum, J. Ben-Benjamin, D. Hornback, S. Nagamiya, Viktor Riabov, Gerd Joachim Kunde, Dong Jo Kim, J. Koster, C. Oakley, T. C. Awes, Kyoichiro Ozawa, A. Drees, J. S. Bok, Y. Hori, Anne Marie Sickles, C. P. Singh, A. S. Nyanin, Catherine Micaela Silvestre, Vaclav Vrba, Klaus Johannes Reygers, Y. S. Lai, Rui Wei, B. M. Johnson, Motoi Inaba, H. Masui, S. H. Lee, S. Butsyk, I. Shein, R. J. Petti, A. Veicht, R. M. Wright, K. Sedgwick, A. Isupov, Rachid Nouicer, Kiyoshi Tanida, S. Zhou, M. Oka, A. N. Zelenski, M. Proissl, C. H. Chen, G. R. Young, A. Sukhanov, J. Sziklai, H. Pereira, Minghui Liu, S. D. Rolnick, A. Manion, E. Kistenev, J. S. Yoo, Brian Cole, M. K. Dayananda, Julia Velkovska, Y. Morino, Kenneth Francis Read, M. Wysocki, P. Kline, B. Bannier, P. Lichtenwalner, T. Sodre, Jongmin Lee, J. Sun, S. Yokkaichi, Atsushi Taketani, Y. Tanaka, D. Lynch, Martin Purschke, H. J. Moon, D. Broxmeyer, A. Morreale, R. K. Choudhury, K. S. Joo, N. Apadula, A. Vossen, S. Esumi, D. Sharma, J. T. Mitchell, R. Ichimiya, R. Seidl, Vladislav Manko, M. Slunečka, C. Vale, S. Afanasiev, Christine Angela Aidala, S. Bathe, Kensuke Homma, E. Richardson, J. Newby, G. Roche, K. I. Hahn, B. Bassalleck, M. Konno, Y. Nakamiya, Y. J. Kim, A. Taranenko, Kazushi Miki, T. Horaguchi, Brajesh K. Singh, S. Tarafdar, Eva Haslum, B. Komkov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, H. H. Shim, S. H. Lim, R. Belmont, J. S. Kapustinsky, V. Babintsev, X. Jiang, M. Tomášek, G. S. Kyle, James Alexander, Byung-Sik Hong, A. Bazilevsky, Alexandre Lebedev, and D. M. Lee
Subjects: Quark, Physics, Particle physics, Antiparticle, 010308 nuclear & particles physics, General Physics and Astronomy, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Fermion, 01 natural sciences, 7. Clean energy, Nuclear physics, Positron, Antimatter, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Boson, Lepton
Abstract: Large parity-violating longitudinal single-spin asymmetries A(L)(e+) = 0.86(-0.14)(+0.30) and Ae(L)(e-) = 0.88(-0.71)(+0.12) are observed for inclusive high transverse momentum electrons and positrons in polarized p + p collisions at a center-of-mass energy of root s = 500 GeV with the PHENIX detector at RHIC. These e(+/-) come mainly from the decay of W-+/- and Z(0) bosons, and their asymmetries directly demonstrate parity violation in the couplings of the W-+/- to the light quarks. The observed electron and positron yields were used to estimate W-+/- boson production cross sections for the e(+/-) channels of sigma(pp -> W+X) X BR(W+ -> e(+) nu(e)) = 144.1 +/- 21.2(stat)(-10.3)(+3.4)(syst) +/- 21.6(norm) pb, and sigma(pp -> W-X) X BR(W- -> e(-) (nu) over bar (e)) = 3.17 +/- 12.1(stat)(-8.2)(+10.1)(syst) +/- 4.8(norm) pb.
Published: 2011

49. Measurement of transverse single-spin asymmetries forJ/ψproduction in polarizedp+pcollisions ats=200 GeV

Author: T. Ichihara, Jongmin Lee, Ryugo S. Hayano, A. Hadj Henni, Y. Riabov, Kenta Shigaki, Mate Csanad, M. Nguyen, Beomkyu Kim, K. Boyle, D. Lynch, Taku Gunji, H. Gong, J. Seele, F. Kajihara, I. Tserruya, Alice Mignerey, Y. Ikeda, A. S. Nyanin, L. D'Orazio, S. Esumi, Aaron Angerami, Wei Xie, M. Nihashi, Rachid Nouicer, K. A. Drees, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, David D'Enterria, Y. Tomita, D. S. Jumper, S. Butsyk, J. G. Boissevain, E. J. Mannel, M. Naglis, S. Afanasiev, Takahiro Fusayasu, V. L. Rykov, T. Dahms, O. Dietzsch, M. Proissl, Vladimir Samsonov, K. V. Dharmawardane, Sergey Fokin, Yu. Efremenko, V. Singh, H. Iinuma, S. Zhou, A. P.T. Palounek, Takao Sakaguchi, C. Klein-Boesing, E. T. Atomssa, H. Valle, Alexander Malakhov, A. Baldisseri, S. D. Rolnick, R. Pak, K. Karatsu, C. Pinkenburg, S. Dairaku, A. D. Frawley, R. P. Pisani, Masayasu Ishihara, A. Ster, Anne Marie Sickles, J. Newby, C. L. Woody, A. Berdnikov, V. S. Pantuev, F. Matathias, Kensuke Homma, D. Silvermyr, E. H. Kim, X. Jiang, O. Zaudtke, J. L. Charvet, S. P. Sorensen, Dipanwita Dutta, M. Issah, T. Kempel, Dong-Hun Kim, H. A. Gustafsson, Tadaaki Isobe, R. A. Soltz, H. Borel, N. Kamihara, K. S. Joo, E. Richardson, M. Virius, C. Zhang, Viktor Riabov, S. Huang, A. Caringi, Julia Velkovska, O. Chvala, S. Bathe, M. Grosse Perdekamp, P. Constantin, S. Chernichenko, W. Holzmann, F. Staley, L. S. Zolin, M. Stepanov, G. Roche, Y. J. Mao, D. Hornback, K. I. Hahn, T. Murakami, Agneta Oskarsson, Y. Berdnikov, M. E. Connors, B. Bassalleck, Seong H. Kim, P. L. McGaughey, Tamas Ferenc Csorgo, W. J. Park, N. Borggren, C. H. Chen, Christopher Rosen, Kazuyoshi Kurita, I. V. Sourikova, B. Love, C. Oakley, A. Drees, M. Heffner, G. R. Young, Y. Akiba, M. Mishra, S. Nagamiya, I. Ravinovich, J. G. Lajoie, Vaclav Vrba, Klaus Johannes Reygers, J. H. Kang, M. Konno, Hongfang Liu, D. E. Fields, B. V. Jacak, N. Apadula, J. L. Nagle, M. Kurosawa, A. Enokizono, P. Chung, P. D. Barnes, A. Yanovich, J. S. Haggerty, M. Chiu, A. Taranenko, Kazushi Miki, T. Horaguchi, M. Bai, M. I. Nagy, K. Okada, B. Sahlmueller, M. Kasai, J. Imrek, I. J. Choi, Y. Onuki, Brajesh K. Singh, A. Kravitz, D. Watanabe, B. Komkov, H. En'yo, M. J. Leitch, K. Sakashita, A. G. Litvinenko, M. Gonin, Jan Rak, K. O. Eyser, A. K. Purwar, K. Fujiwara, T. Jones, A. Glenn, H. Qu, Norio Saito, A. Datta, Y. Nakamiya, Peter Christiansen, Y. L. Yamaguchi, Tsutomu Mibe, M. A. L. Leite, M. Ouchida, N. Means, J. Asai, Eunja Kim, D. Sharma, R. Ichimiya, D. Winter, M. McCumber, R. Lacey, A. V. Kazantsev, S. Tarafdar, R. Granier de Cassagnac, A. Adare, M. D. Malik, E. Vznuzdaev, G. Baksay, D. Yu Peressounko, Jason Kamin, S. Sawada, Hideki Hamagaki, K. Aoki, G. David, P. Tarján, S. N. White, R. Belmont, Eva Haslum, J. S. Kapustinsky, Shingo Sakai, A. Sukhanov, B. Lenzi, V. Babintsev, Deepa Thomas, J. Hanks, H. Pereira, Zhiying You, Marisilvia Donadelli, R. Bennett, Sung Keun Park, B. Azmoun, A. Král, G. S. Kyle, M. J. Kweon, Jen-Chieh Peng, V. Bumazhnov, M. Kawashima, Ajit Kumar Mohanty, Y. Morino, S. P. Stoll, James Alexander, H. Pei, Zvi Hirsh Citron, A. Kozlov, N. N. Ajitanand, Andry Malala Rakotozafindrabe, T. A. Shibata, C. L. Silva, R. Seto, L. Tomášek, Y. S. Lai, M. Finger, R. Averbeck, Byung-Sik Hong, A. Yu. Semenov, S. S.E. Rosendahl, A. Bazilevsky, G. Bunce, H. W. Van Hecke, T. Sato, K. Nakano, Philippe Rosnet, Y. J. Kim, Takahiro Nakamura, K. Haruna, K. S. Sim, R. Tanabe, D. Layton, K. Watanabe, Inkyu Park, J. T. Mitchell, L. Aphecetche, V. Dzhordzhadze, Alexandre Lebedev, J. Gosset, Senta Greene, D. M. Lee, R. Seidl, Y. Kwon, Xiong Wang, W. E. Sondheim, Z. Conesa del Valle, Vladislav Manko, D. Ivanischev, R. Yang, K. Shoji, G. Grim, A. T. Basye, A. Churyn, Susumu Oda, K. B. Lee, D. Jouan, W. C. Chang, M. Slunečka, K. Kiriluk, D. Isenhower, A. Toia, S. Taneja, A. Kiss, S. Belikov, B. Fadem, E. O'Brien, Dong Jo Kim, A. Durum, I. Danchev, L. Mašek, P. A. Rukoyatkin, A. Dion, M. Oka, K. Imai, T. Niita, Henner Buesching, Steve Edwards, Rushan Han, X. He, Catherine Micaela Silvestre, K. Yamaura, P. W. Stankus, Johannes Peter Wessels, C. Vale, B. Meredith, Charles Maguire, B. S. Chang, Christine Angela Aidala, J. Klay, Y. Aramaki, C. A. Ogilvie, V. Peresedov, John Hill, Marcus Hohlmann, Kiyoshi Tanida, A. Veicht, D. Roach, Kisung Lee, T. K. Hemmick, Yasuo Miake, Atsushi Taketani, K. M. Kijima, E. Kistenev, Toru Sugitate, S. Yokkaichi, P. Liebing, Tae-Yeon Lee, P. Ruzicka, L. A. Linden Levy, P. Mikeš, T. C. Awes, Kyoichiro Ozawa, T. Liška, P. Lichtenwalner, J. Koster, Martin Purschke, L. Kochenda, Alexander Milov, I. Nakagawa, T. Engelmore, J. S. Bok, Jun Kikuchi, François Fleuret, Xingguo Li, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, Y. Tanaka, S. Batsouli, H. Masui, A. K. Dubey, S. Campbell, Minghui Liu, A. A. Bickley, V. E. Semenov, H. Al-Ta'Ani, Kenneth Francis Read, H. J. Moon, Tatsuya Chujo, K. N. Barish, L. Baksay, S. Nam, S. Sano, M. L. Brooks, K. Das, E. P. Hartouni, Maya Hachiya Shimomura, Y. I. Makdisi, M. J. Tannenbaum, H. Torii, M. Rosati, A. Kim, D. Mukhopadhyay, S. Rembeczki, Y. Fukao, Alexei Khanzadeev, A. A. Vinogradov, T. Hester, E. Stenlund, J. B. Choi, Jiangyong Jia, Y. Goto, J. Hamblen, V-N. Tram, N. Grau, J. H. Bhom, J. M. Durham, T. V. Moukhanova, Dmitry Blau, Motoi Inaba, E. J. Desmond, R. M. Wright, M. Togawa, E. Vazquez-Zambrano, J. Park, Y. Tsuchimoto, Y. Iwanaga, I. E. Yushmanov, R. Vértesi, J. E. Frantz, A. Deshpande, J. Ying, A. Franz, Y. Watanabe, I. Younus, A. Soldatov, D. Kawall, C. M. Camacho, H. Themann, Prashant Shukla, S. F. Pate, Ke. Nakamura, J. Murata, Gerd Joachim Kunde, I. Shein, H. Al-Bataineh, K. Sedgwick, C. Baumann, S. Kametani, C. P. Singh, B. M. Johnson, V. Papavassiliou, R. J. Petti, A. Morreale, Z. Fraenkel, R. K. Choudhury, A. Isupov, C. Suire, J. Sziklai, M. K. Dayananda, Brian Cole, M. Wysocki, R. S. Towell, I. Garishvili, F. Wei, C. Y. Chi, J. Jin, E. M. Takagui, and T. L. Thomas
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, Transverse plane, Distribution function, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Nucleon, Relativistic Heavy Ion Collider, Spin-½
Abstract: We report the first measurement of transverse single-spin asymmetries in J/psi production from transversely polarized p + p collisions at root s = 200 GeV with data taken by the PHENIX experiment in 2006 and 2008. The measurement was performed over the rapidity ranges 1.2 < vertical bar y vertical bar < 2.2 and vertical bar y vertical bar < 0.35 for transverse momenta up to 6 GeV/c. J/psi production at the Relativistic Heavy Ion Collider is dominated by processes involving initial-state gluons, and transverse single-spin asymmetries of the J/psi can provide access to gluon dynamics within the nucleon. Such asymmetries may also shed light on the long-standing question in QCD of the J/psi production mechanism. Asymmetries were obtained as a function of J/psi transverse momentum and Feynman-x, with a value of -0.086 +/- 0.026(stat) +/- 0.003(syst) in the forward region. This result suggests possible nonzero trigluon correlation functions in transversely polarized protons and, if well defined in this reaction, a nonzero gluon Sivers distribution function.
Published: 2010

50. HighpTdirect photon andπ0triggered azimuthal jet correlations and measurement ofkTfor isolated direct photons inp+pcollisions ats=200 GeV

Author: Ajit Kumar Mohanty, P. Tarján, T. A. Shibata, T. Sato, David D'Enterria, S. Bathe, Agneta Oskarsson, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, Y. Nakamiya, Y. Berdnikov, Y. Akiba, A. V. Kazantsev, E. R. Kinney, D. P. Morrison, S. Campbell, M. Mishra, D. Isenhower, A. Toia, S. Nagamiya, V. E. Semenov, M. N. Wagner, J. Zimányi, C. Baumann, D. Lynch, Tatsuya Chujo, G. Baksay, L. Tomášlek, C. P. Singh, Tae-Yeon Lee, Martin Purschke, L. Mašek, Vaclav Vrba, Klaus Johannes Reygers, I. Tserruya, Yu. Efremenko, S. Butsyk, Vladimir Samsonov, K. Dehmelt, Jen-Chieh Peng, Senta Greene, B. M. Johnson, Xiong Wang, V. Singh, Dong Jo Kim, G. S. Kyle, Osamu Jinnouchi, A. Veicht, James Alexander, A. Isupov, C. Suire, Y. Fukao, T. Niita, A. Shevel, A. T. Basye, B. E. Norman, Maya Hachiya Shimomura, M. Naglis, C. L. Silva, P. Mikeš, J. Sziklai, Y. J. Mao, J. T. Mitchell, S. Kametani, T. Horaguchi, V. L. Rykov, T. Dahms, R. Averbeck, Byung-Sik Hong, Brian Cole, D. Kotchetkov, T. Hester, B. Fadem, I. Ravinovich, Y. I. Makdisi, E. O'Brien, A. Bazilevsky, R. Seidl, J. L. Charvet, Vladislav Manko, M. Slunečka, M. Mitrovski, Philippe Rosnet, B. Love, R. S. Towell, A. Morreale, I. Garishvili, Akio Kiyomichi, F. Wei, Masayasu Ishihara, Y. Nagata, K. O. Eyser, A. K. Purwar, M. Bai, K. Fujiwara, Z. Fraenkel, S. Belikov, Tamas Ferenc Csorgo, R. A. Soltz, H. Borel, E. J. Desmond, T. C. Awes, Kyoichiro Ozawa, T. Liška, T. E. Miller, M. Kurosawa, Jun Kikuchi, H. Iinuma, Alexandre Lebedev, O. Dietzsch, N. Kurihara, E. T. Atomssa, M. J. Tannenbaum, A. G. Litvinenko, D. M. Lee, C. Vale, B. S. Chang, J. L. Nagle, M. Togawa, K. S. Sim, V. Dzhordzhadze, M. Grosse Perdekamp, H. Torii, J. Park, Christine Angela Aidala, R. K. Choudhury, J. Klay, Y. Kwon, H. Valle, Susumu Sato, C. Y. Chi, V-N. Tram, N. Grau, Dipanwita Dutta, Tadaaki Isobe, A. P.T. Palounek, C. A. Ogilvie, K. S. Joo, M. E. Connors, P. Chung, R. Yang, R. Bennett, J. H. Kang, J. S. Haggerty, A. Romana, D. Mukhopadhyay, A. Kozlov, S. Rembeczki, J. Imrek, H. Hiejima, C. L. Woody, A. Berdnikov, K. A. Drees, F. Staley, K. Kiriluk, T. K. Hemmick, M. Wysocki, S. Taneja, R. Seto, K. Haruna, Y. Tsuchimoto, F. Matathias, Saskia Mioduszewski, M. Finger, H. A. Gustafsson, H. W. Van Hecke, Yasuo Miake, P. L. McGaughey, Eva Haslum, J. Chiba, W. S. Emam, M. K. Lee, B. Lenzi, H. Liu, Kensuke Homma, K. Imai, K. Shoji, Motoi Inaba, Julia Velkovska, I. E. Yushmanov, M. Chiu, M. Rosati, P. Constantin, S. Chernichenko, E. H. Kim, S. Dairaku, X. He, O. O. Omiwade, C. Zhang, Alexei Khanzadeev, H. Kanou, Taku Gunji, H. Gong, J. Seele, O. Zaudtke, D. Sharma, D. Winter, D. Kawall, S. Afanasiev, P. W. Stankus, L. Kochenda, B. Bassalleck, A. Ster, H. Themann, J. Jin, M. Konno, V. Peresedov, E. Stenlund, H. Sakata, E. M. Takagui, Takao Sakaguchi, R. Ichimiya, P. Ružička, D. Yu Peressounko, A. Kiss, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, C. Klein-Boesing, J. Newby, J. Koster, F. Kajihara, H. Delagrange, Anne Marie Sickles, M. Virius, B. Azmoun, A. Král, M. J. Kweon, K. Sakashita, A. D. Frawley, T. Tabaru, Robert F. Hobbs, Andry Malala Rakotozafindrabe, Viktor Riabov, Y. S. Lai, S. Batsouli, H. Masui, A. K. Dubey, Z. Yasin, Henner Buesching, V. I. Kochetkov, S. Huang, S. H. Aronson, A. A. Bickley, R. Tanabe, D. Layton, V. S. Pantuev, J. Murata, I. V. Sourikova, J. Egdemir, D. Hornback, Minghui Liu, A. A. Vinogradov, S. Takagi, Jason Kamin, S. Esumi, M. Heffner, S. Zhou, W. Holzmann, K. N. Barish, A. Baldisseri, S. D. Rolnick, M. Oka, C. R. Cleven, G. R. Young, C. Haegemann, Y. Inoue, Junji Tojo, S. P. Stoll, Kenneth Francis Read, A. Taranenko, Jiangyong Jia, Y. Goto, Y. L. Yamaguchi, B. Komkov, A. Dion, T. V. Moukhanova, Gerd Joachim Kunde, I. Shein, W. C. Chang, W. A. Zajc, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Masashi Kaneta, A. Glenn, Kazushi Miki, V. Baublis, A. Denisov, V. Cianciolo, K. Das, R. Vértesi, Y. Onuki, Atsushi Taketani, Marcus Hohlmann, Brajesh K. Singh, S. S.E. Rosendahl, G. Bunce, A. Enokizono, M. Ouchida, T. Kempel, Dong-Hun Kim, K. Sedgwick, P. Liebing, Norio Saito, T. Ichihara, M. A. L. Leite, A. Deshpande, Y. Tomita, Jan Rak, Sergey Fokin, M. L. Brooks, Rushan Han, K. Okada, E. P. Hartouni, R. Lacey, N. Means, J. Asai, B. Sahlmueller, A. Churyn, D. Jouan, Debashish Pal, C. Pinkenburg, R. Granier de Cassagnac, A. Adare, J. E. Frantz, H. En'yo, M. J. Leitch, Steven E. Skutnik, R. Pak, N. Kamihara, S. Sawada, Y. Watanabe, J. S. Kapustinsky, M. Stepanov, G. Roche, A. Yu. Semenov, V. Babintsev, I. Younus, Shingo Sakai, T. L. Thomas, R. Armendariz, J. Ying, A. Franz, H. Qu, Kazuyoshi Kurita, A. Soldatov, J. Gosset, Matthew G. Reuter, A. Drees, Takahiro Fusayasu, J. Kubart, Ryugo S. Hayano, Hideki Hamagaki, K. Aoki, G. David, Y. Riabov, Kenta Shigaki, S. Yokkaichi, M. Nguyen, A. S. Nyanin, Rachid Nouicer, Alexander Malakhov, C. M. Camacho, Prashant Shukla, S. F. Pate, D. Silvermyr, H. Al-Bataineh, L. S. Zolin, W. J. Park, V. Papavassiliou, Sébastien Gadrat, P. D. Barnes, A. Yanovich, S. N. White, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, P. A. Rukoyatkin, B. Meredith, John Hill, Toru Sugitate, L. D. Isenhower, François Fleuret, Hiroaki Ohnishi, K. B. Lee, D. Roach, K. M. Kijima, Xingguo Li, M. Gonin, A. Sukhanov, H. Pereira, Y. Morino, D. E. Fields, B. V. Jacak, M. B. Deaton, Y. Tanaka, M. McCumber, A. Hadj Henni, S. P. Sorensen, Dylan Walker, Beomkyu Kim, K. Boyle, Seong H. Kim, Wei Xie, J. G. Lajoie, T. Hachiya, N. N. Ajitanand, L. Baksay, I. J. Choi, A. Kravitz, Takahiro Nakamura, Charles Maguire, Susumu Oda, A. Durum, Catherine Micaela Silvestre, K. Yamaura, Kiyoshi Tanida, E. Kistenev, H. Harada, H. Pei, M. I. Nagy, M. Issah, M. D. Malik, E. Vznuzdaev, L. Aphecetche, Johannes Peter Wessels, and Mate Csanad
Subjects: Elastic scattering, Physics, Nuclear and High Energy Physics, Photon, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, Compton scattering, Elementary particle, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: Correlations of charged hadrons of 1< p(T) < 10 Gev/c with high pT direct photons and pi(0) mesons in the range 5< p(T) < 15 Gev/c are used to study jet fragmentation in the gamma + jet and dijet channels, respectively. The magnitude of the partonic transverse momentum, k(T), is obtained by comparing to a model incorporating a Gaussian kT smearing. The sensitivity of the associated charged hadron spectra to the underlying fragmentation function is tested and the data are compared to calculations using recent global fit results. The shape of the direct photon-associated hadron spectrum as well as its charge asymmetry are found to be consistent with a sample dominated by quark-gluon Compton scattering. No significant evidence of fragmentation photon correlated production is observed within experimental uncertainties.
Published: 2010

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