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462 results on '"Kim, G.-B."'

1. High-Precision Excited-State Nuclear Recoil Spectroscopy with Superconducting Sensors

Author

Bray, C., Fretwell, S., Zepeda-Ruiz, L. A., Kim, I., Samanta, A., Wang, K., Stone-Whitehead, C., Warburton, W. K., Ponce, F., Leach, K. G., Abells, R., Amaro, P., Andoche, A., Cantor, R., Diercks, D., Guerra, M., Hall, A., Harris, C., Harris, J., Hayen, L., Hervieux, P. A., Kim, G. B., Lennarz, A., Lordi, V., Machado, J., Machule, P., Marino, A., McKeen, D., Mougeot, X., Ruiz, C., Smolsky, J. P. Santos J., Waters, B. D., and Friedrich, S.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

Superconducting sensors doped with rare isotopes have recently demonstrated powerful sensing performance for sub-keV radiation from nuclear decay. Here, we report the first high-resolution recoil spectroscopy of a single, selected nuclear state using superconducting tunnel junction (STJ) sensors. The STJ sensors were used to measure the eV-scale nuclear recoils produced in $^7$Be electron capture decay in coincidence with the 478 keV $\gamma$-ray emitted in decays to the excited nuclear state in $^7$Li. Details of the Doppler broadened recoil spectrum depend on the slow-down dynamics of the recoil ion and can constrain the interaction potential between the recoiling Li and the Ta matrix of the STJ sensor. The results have implications in several areas from nuclear structure and stopping powers at eV-scale energies to direct searches for dark matter, neutrino mass measurements, and other physics beyond the standard model.

Published
2024

2. Athermal phonon collection efficiency in diamond crystals for low mass dark matter detection

Author

Kim, I., Kurinsky, N. A., Kagan, H., Boyd, S. T. P., and Kim, G. B.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

We explored the efficacy of lab-grown diamonds as potential target materials for the direct detection of sub-GeV dark matter~(DM) using metallic magnetic calorimeters~(MMCs). Diamond, with its excellent phononic properties and the low atomic mass of the constituent carbon, can play a crucial role in detecting low-mass dark matter particles. The relatively long electron-hole pair lifetime inside the crystal may provide discrimination power between the DM-induced nuclear recoil events and the background-induced electron recoil events. Utilizing the the fast response times of the MMCs and their unique geometric versatility, we deployed a novel methodology for quantifying phonon dynamics inside diamond crystals. We demonstrated that lab-grown diamond crystals fabricated via the chemical vapor deposition~(CVD) technique can satisfy the stringent quality requirements for sub-GeV dark matter searches. The high-quality polycrystalline CVD diamond showed a superior athermal phonon collection efficiency compared to that of the reference sapphire crystal, and achieved energy resolution 62.7~eV at the 8.05~keV copper fluorescence line. With this energy resolution, we explored the low-energy range below 100~eV and confirmed the existence of so-called low-energy excess~(LEE) reported by multiple cryogenic experiments.

Published
2024

3. Decay Energy Spectrometry for Improved Nuclear Material Analysis at the IAEA NML

Author

Kim, G. B., Kavner, A. R. L., Parsons-Davis, T., Friedrich, S., Drury, O. B., Lee, D., Zhang, X., Hines, N., Boyd, S. T. P., Weidenbenner, S., Schreiber, K., Martinson, S., Smith, C., McNeel, D., Salazar, S., Koehler, K., Carpenter, M., Croce, M., Schmidt, D., and Ullom, J.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

Decay energy spectrometry (DES) is a novel radiometric technique for high-precision analysis of nuclear materials. DES employs the unique thermal detection physics of cryogenic microcalorimeters with ultra-high energy resolution and 100$\%$ detection efficiency to accomplish high precision decay energy measurements. Low-activity nuclear samples of 1 Bq or less, and without chemical separation, are used to provide elemental and isotopic compositions in a single measurement. Isotopic ratio precisions of 1 ppm - 1,000 ppm (isotope dependent), which is close to that of the mass spectrometry, have been demonstrated in 12-hour DES measurements of ~5 Bq samples of certified reference materials of uranium (U) and plutonium (Pu). DES has very different systematic biases and uncertainties, as well as different sensitivities to nuclides, compared to mass-spectrometry techniques. Therefore, the accuracy and confidence of nuclear material assays can be improved by combining this new technique with existing mass-spectrometry techniques. Commercial-level DES techniques and equipment are being developed for the implementation of DES at the Nuclear Material Laboratory (NML) of International Atomic Energy Agency (IAEA) to provide complementary measurements to the existing technologies. The paper describes details of DES measurement methods, as well as DES precision and accuracy to U and Pu standard sources to discuss its capability in analysis of nuclear safeguards samples., Comment: This was submitted to 2022 IAEA symposium on nuclear safeguards (https://www.iaea.org/events/sg-2022), and posted at https://media.superevent.com/documents/20221027/668fdac0ee8d895ec6bcf293b1c42e6a/id-145.pdf

Published
2024

4. The Data Acquisition System for Phase-III of the BeEST Experiment

Author

Bray, C., Fretwell, S., Kim, I., Warburton, W. K., Ponce, F., Leach, K. G., Friedrich, S., Abells, R., Amaro, P., Andoche, A., Cantor, R., Diercks, D., Guerra, M., Hall, A., Harris, C., Harris, J. T., Hayen, L., Hervieux, P. A., Kim, G. B., Lennarz, A., Lordi, V., Machado, J., Machule, P., Marino, A., McKeen, D., Mougeot, X., Ruiz, C., Samanta, A., Santos, J. P., and Stone-Whitehead, C.

Published
2024
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5. The Data Acquisition System for Phase-III of the BeEST Experiment

Author

Bray, C., Fretwell, S., Kim, I., Warburton, W. K., Ponce, F., Leach, K. G., Friedrich, S., Abells, R., Amaro, P., Andoche, A., Cantor, R., Diercks, D., Guerra, M., Hall, A., Harris, C., Harris, J., Hayen, L., Hervieux, P. A., Kim, G. B., Lennarz, A., Lordi, V., Machado, J., Machule, P., Marino, A., McKeen, D., Mougeot, X., Ruiz, C., Samanta, A., Santos, J. P., and Stone-Whitehead, C.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment, Quantum Physics
Abstract

The BeEST experiment is a precision laboratory search for physics beyond the standard model that measures the electron capture decay of $^7$Be implanted into superconducting tunnel junction (STJ) detectors. For Phase-III of the experiment, we constructed a continuously sampling data acquisition system to extract pulse shape and timing information from 16 STJ pixels offline. Four additional pixels are read out with a fast list-mode digitizer, and one with a nuclear MCA already used in the earlier limit-setting phases of the experiment. We present the performance of the data acquisition system and discuss the relative advantages of the different digitizers., Comment: 8 pages, 4 figures, proceedings for The 20th International Conference on Low Temperature Detectors

Published
2023

6. Limits on the Existence of sub-MeV Sterile Neutrinos from the Decay of $^7$Be in Superconducting Quantum Sensors

Author

Friedrich, S., Kim, G. B., Bray, C., Cantor, R., Dilling, J., Fretwell, S., Hall, J. A., Lennarz, A., Lordi, V., Machule, P., McKeen, D., Mougeot, X., Ponce, F., Ruiz, C., Samanta, A., Warburton, W. K., and Leach, K. G.

Subjects
Nuclear Experiment, High Energy Physics - Experiment, Quantum Physics
Abstract

Sterile neutrinos are natural extensions to the standard model of particle physics and provide a possible portal to the dark sector. We report a new search for the existence of sub-MeV sterile neutrinos using the decay-momentum reconstruction technique in the decay of $^7$Be. The experiment measures the total energy of the $^7$Li daughter atom from the electron capture decay of $^7$Be implanted into sensitive superconducting tunnel junction (STJ) quantum sensors. This first experiment presents data from a single STJ operated at a low count rate for a net total of 28 days, and provides exclusion limits on sterile neutrinos in the mass range from 100 to 850 keV that improve upon previous work by up to an order of magnitude., Comment: 7 pages. 3 figures. Submitted to Physical Review Letters

Published
2020
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7. Direct measurement of the $^7$Be $L/K$ capture ratio in Ta-based superconducting tunnel junctions

Author

Fretwell, S., Leach, K. G., Bray, C., Kim, G. B., Dilling, J., Lennarz, A., Mougeot, X., Ponce, F., Ruiz, C., Stackhouse, J., and Friedrich, S.

Subjects
Nuclear Experiment, Astrophysics - Solar and Stellar Astrophysics, Nuclear Theory
Abstract

We report a high-statistics measurement of the $L/K$ orbital electron capture (EC) ratio in $^7$Be embedded in cryogenic Ta. The thin Ta film formed part of a high-resolution superconducting tunnel junction (STJ) radiation detector that was used to identify the signals from different decay channels. The measured $L/K$ capture ratio of 0.070(7) is significantly larger than the only previous measurement of this quantity and the theoretical predictions that include in-medium effects. This value is a uniquely sensitive probe of the 1s and 2s orbital overlaps with the nucleus, and is of relevance to nuclear and atomic physics, as well as Li production in novae and other astrophysical scenarios. This is the first experiment that uses STJs for nuclear-recoil detection, opening a new experimental avenue for low-energy precision measurements with rare isotopes., Comment: 5 pages, 3 figures

Published
2020
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10. Absolute Decay Counting of 146147Sm and 146147Sm for Early Solar System Chronology

Author

Kim, G. B., Borg, L. E., Boyd, S. T. P., Cantor, R. H., Despotopulos, J. D., Drury, O. B., Friedrich, S., Gallant, A., Hines, N. R., Jacobs, A., Jovanovic, I., Kmak, K. N., Kavner, A. R. L., Kim, Y. H., Kunz, P., Kwiatkowski, A., Kwon, D. H., Lee, D., Murböck, T., Scielzo, N. D., Shollenberger, Q. R., Sio, C. K. I., Thomas, K. J., Wooddy, T., and Walls, C.

Published
2022
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13. Search for solar axions with CsI(Tl) crystal detectors

Author

KIMS Collaboration, Yoon, Y. S., Park, H. K., Bhang, H., Choi, J. H., Choi, S., Hahn, I. S., Jeon, E. J., Joo, H. W., Kang, W. G., Kim, B. H., Kim, G. B., Kim, H. J., Kim, K. W., Kim, S. C., Kim, S. K., Kim, Y. D., Kim, Y. H., Lee, H. S., Lee, J. H., Lee, J. K., Lee, S. J., Leonard, D. S., Li, J., Myung, S. S., Olsen, S. L., and So, J. H.

Subjects
High Energy Physics - Experiment, Astrophysics - Solar and Stellar Astrophysics, High Energy Physics - Phenomenology
Abstract

The results of a search for solar axions from the Korea Invisible Mass Search (KIMS) experiment at the Yangyang Underground Laboratory are presented. Low-energy electron-recoil events would be produced by conversion of solar axions into electrons via the axio-electric effect in CsI(Tl) crystals. Using data from an exposure of 34,596 $\rm kg \cdot days$, we set a 90 \% confidence level upper limit on the axion-electron coupling, $g_{ae}$, of $1.39 \times 10^{-11}$ for an axion mass less than 1 keV/$\rm c^2$. This limit is lower than the indirect solar neutrino bound, and fully excludes QCD axions heavier than 0.48 eV/$\rm c^2$ and 140.9 eV/$\rm c^2$ for the DFSZ and KSVZ models respectively., Comment: 9 pages, 6 figures

Published
2016

14. A CaMoO4 Crystal Low Temperature Detector for the AMoRE Neutrinoless Double Beta Decay Search

Author

Kim, G. B., Choi, S., Danevich, F. A., Fleischmann, A., Kang, C. S., Kim, H. J., Kim, S. R., Kim, Y. D., Kim, Y. H., Kornoukhov, V. A., Lee, H. J., Lee, J. H., Lee, M. K., Lee, S. J., So, J. H., and Yoon, W. S.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

We report the development of a CaMoO4 crystal low temperature detector for the AMoRE neutrinoless double beta decay (0{\nu}\b{eta}\b{eta}) search experiment. The prototype detector cell was composed of a 216 g CaMoO4 crystal and a metallic magnetic calorimeter. An over-ground measurement demonstrated FWHM resolution of 6-11 keV for full absorption gamma peaks. Pulse shape discrimination was clearly demonstrated in the phonon signals, and 7.6 {\sigma} of discrimination power was found for the {\alpha} and \b{eta}/{\gamma} separation. The phonon signals showed rise-times of about 1 ms. It is expected that the relatively fast rise-time will increase the rejection efficiency of two-neutrino double beta decay pile-up events which can be one of the major background sources in 0{\nu}\b{eta}\b{eta} searches., Comment: 6 pages, 8 figures, 1 table. Published in Advanced in High Energy Physics

Published
2016
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15. Technical Design Report for the AMoRE $0\nu\beta\beta$ Decay Search Experiment

Author

Alenkov, V., Aryal, P., Beyer, J., Boiko, R. S., Boonin, K., Buzanov, O., Chanthima, N., Chernyak, M. K. Cheoun D. M., Choi, J., Choi, S., Danevich, F. A., Djamal, M., Drung, D., Enss, C., Fleischmann, A., Gangapshev, A. M., Gastaldo, L., Gavriljuk, Yu. M., Gezhaev, A. M., Gurentsov, V. I., Ha, D. H, Hahn, I. S., Jang, J. H., Jeon, E. J., Jo, H. S., Joo, H., Kaewkhao, J., Kang, C. S., Kang, S. J., Kang, W. G, Karki, S., Kazalov, V. V., Khanbekov, N., Kim, G. B., Kim, H. J., Kim, H. L., Kim, H. O., Kim, I., Kim, J. H., Kim, K., Kim, S. K., Kim, S. R., Kim, Y. D., Kim, Y. H., Kirdsiri, K., Kobychev, V. V., Kornoukhov, V., Kuzminov, V. V., Lee, H. J., Lee, H. S., Lee, J. H., Lee, J. M., Lee, J. Y., Lee, K. B., Lee, M. H., Lee, M. K., Leonard, D. S., Li, J., Li, Y. J., Limkitjaroenporn, P., Ma, K. J., Mineev, O. V., Mokina, V. M., Olsen, S. L., Panasenko, S. I., Pandey, I., Park, H. K., Park, H. S., Park, K. S., Poda, D. V., Polischuk, O. G., Polozov, P., Prihtiadi, H., Ra, S. J., Ratkevich, S. S., Rooh, G., Siyeon, K., Srisittipokakun, N., So, J. H., Son, J. K., Tekueva, J. A., Tretyak, V. I., Veresnikova, A. V., Wirawan, R., Yakimenko, S. P., Yershov, N. V., Yoon, W. S., Yoon, Y. S., and Yue, Q.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The AMoRE (Advanced Mo-based Rare process Experiment) project is a series of experiments that use advanced cryogenic techniques to search for the neutrinoless double-beta decay of \mohundred. The work is being carried out by an international collaboration of researchers from eight countries. These searches involve high precision measurements of radiation-induced temperature changes and scintillation light produced in ultra-pure \Mo[100]-enriched and \Ca[48]-depleted calcium molybdate ($\mathrm{^{48depl}Ca^{100}MoO_4}$) crystals that are located in a deep underground laboratory in Korea. The \mohundred nuclide was chosen for this \zeronubb decay search because of its high $Q$-value and favorable nuclear matrix element. Tests have demonstrated that \camo crystals produce the brightest scintillation light among all of the molybdate crystals, both at room and at cryogenic temperatures. $\mathrm{^{48depl}Ca^{100}MoO_4}$ crystals are being operated at milli-Kelvin temperatures and read out via specially developed metallic-magnetic-calorimeter (MMC) temperature sensors that have excellent energy resolution and relatively fast response times. The excellent energy resolution provides good discrimination of signal from backgrounds, and the fast response time is important for minimizing the irreducible background caused by random coincidence of two-neutrino double-beta decay events of \mohundred nuclei. Comparisons of the scintillating-light and phonon yields and pulse shape discrimination of the phonon signals will be used to provide redundant rejection of alpha-ray-induced backgrounds. An effective Majorana neutrino mass sensitivity that reaches the expected range of the inverted neutrino mass hierarchy, i.e., 20-50 meV, could be achieved with a 200~kg array of $\mathrm{^{48depl}Ca^{100}MoO_4}$ crystals operating for three years., Comment: 93 pages

Published
2015

16. Pulse-shape discrimination between electron and nuclear recoils in a NaI(Tl) crystal

Author

Lee, H. S., Adhikari, G., Adhikari, P., Choi, S., Hahn, I. S., Jeon, E. J., Joo, H. W., Kang, W. G., Kim, G. B., Kim, H. J., Kim, H. O., Kim, K. W., Kim, N. Y., Kim, S. K., Kim, Y. D., Kim, Y. H., Lee, J. H., Lee, M. H., Leonard, D. S., Li, J., Oh, S. Y., Olsen, S. L., Park, H. K., Park, H. S., Park, K. S., Shim, J. H., and So, J. H.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We report on the response of a high light-output NaI(Tl) crystal to nuclear recoils induced by neutrons from an Am-Be source and compare the results with the response to electron recoils produced by Compton scattered 662 keV $\gamma$-rays from a $^{137}$Cs source. The measured pulse-shape discrimination (PSD) power of the NaI(Tl) crystal is found to be significantly improved because of the high light output of the NaI(Tl) detector. We quantify the PSD power with a quality factor and estimate the sensitivity to the interaction rate for weakly interacting massive particles (WIMPs) with nucleons, and the result is compared with the annual modulation amplitude observed by the DAMA/LIBRA experiment. The sensitivity to spin-independent WIMP-nucleon interactions based on 100 kg$\cdot$year of data from NaI detectors is estimated with simulated experiments, using the standard halo model., Comment: 11pages

Published
2015
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17. Measurement of the quenching and channeling effects in a CsI crystal used for a WIMP search

Author

Lee, J. H., Kim, G. B., Seong, I. S., Kim, B. H., Kim, J. H., Li, J., Park, J. W., Lee, J. K., Kim, K. W., Bhang, H., Kim, S. C., Choi, Seonho, Choi, J. H., Joo, H. W., Lee, S. J., Olsen, S. L., Myung, S. S., Kim, S. K., Kim, Y. D., Kang, W. G., So, J. H., Kim, H. J., Lee, H. S., Hahn, I. S., Leonard, D. S., Li, Y. J., Yue, Q., and Li, X. R.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract

We have studied channeling effects in a Cesium Iodide (CsI) crystal that is similar in composition to the ones being used in a search for Weakly Interacting Massive Particles (WIMPs) dark matter candidates, and measured its energy-dependent quenching factor, the relative scintillation yield for electron and nuclear recoils. The experimental results are reproduced with a GEANT4 simulation that includes a model of the scintillation efficiency as a function of electronic stopping power. We present the measured and simulated quenching factors and the estimated effects of channeling.

Published
2015
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18. Neutron calibration facility with an Am-Be source for pulse shape discrimination measurement of CsI(Tl) crystals

Author

Lee, H. S., Bhang, H., Choi, J. H., Choi, S., Hahn, I. S., Jeon, E. J., Joo, H. W., Kang, W. G., Kim, G. B., Kim, H. J., Kim, K. W., Kim, S. C., Kim, S. K., Kim, Y. D., Kim, Y. H., Lee, J. H., Lee, J. K., Leonard, D. S., Li, J., Myung, S. S., Olsen, S. L., and So, J. H.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract

We constructed a neutron calibration facility based on a 300-mCi Am-Be source in conjunction with a search for weakly interacting massive particle candidates for dark matter. The facility is used to study the response of CsI(Tl) crystals to nuclear recoils induced by neutrons from the Am-Be source and comparing them with the response to electron recoils produced by Compton scattering of 662-keV $\gamma$-rays from a $^{137}$Cs source. The measured results on pulse shape discrimination (PSD) between nuclear- and electron-recoil events are quantified in terms of quality factors. A comparison with similar result from a neutron reactor demonstrate the feasibility of performing calibrations of PSD measurements using neutrons from a Am-Be source., Comment: Accepted in JINST

Published
2014
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19. Search for Low-Mass Dark Matter with CsI(Tl) Crystal Detectors

Author

Lee, H. S., Bhang, H., Choi, J. H., Choi, S., Hahn, I. S., Jeon, E. J., Joo, H. W., Kang, W. G., Kim, B. H., Kim, G. B., Kim, H. J., Kim, J. H., Kim, K. W., Kim, S. C., Kim, S. K., Kim, Y. D., Kim, Y. H., Lee, J. H., Lee, J. K., Lee, S. J., Leonard, D. S., Li, J., Li, Y. J., Li, X. R., Myung, S. S., Olsen, S. L., Park, J. W., Seong, I. S., So, J. H., and Yue, Q.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We present a search for low-mass ($\leq 20 GeV/c^{2}$) weakly interacting massive particles(WIMPs), strong candidates of dark matter particles,using the low-background CsI(Tl) detector array of the Korea Invisible Mass Search (KIMS) experiment. With a total data exposure of 24,324.3kg$\cdot$days,we search for WIMP interaction signals produced by nuclei recoiling from WIMP-nuclear elastic scattering with visible energies between 2 and 4keV. The observed energy distribution of candidate events is consistent with null signals, and upper limits of the WIMP-proton spin-independent interaction are set with a 90% confidence level. The observed limit rejects most of the low mass region of parameter space favored by the DAMA annual modulation signal., Comment: 6pages, 5 figures

Published
2014
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20. Thermal Model and Optimization of a Large Crystal Detector using a Metallic Magnetic Calorimeter

Author

Kim, G. B., Choi, S., Jang, Y. S., Kim, H. J., Kim, Y. H., Kobychev, V. V., Lee, H. J., Lee, J. H., Lee, J. Y., Lee, M. K., Lee, S. J., and Yoon, W. S.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

We established a simple thermal model of the heat flow in a large crystal detector designed for a neutrinoless double beta decay experiment. The detector is composed of a CaMoO$_{4}$ crystal and a metallic magnetic calorimeter (MMC). The thermal connection between the absorber and the sensor consists of a gold film evaporated on the crystal surface and gold bonding wires attached to this film and the MMC sensor. The model describes athermal and thermal processes of heat flow to the gold film. A successive experiment based on optimization calculations of the area and thickness of the gold film showed a significant improvement in the size and rise-time of the measured signals.

Published
2014
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23. Transverse-energy distributions at midrapidity in $p$$+$$p$, $d$$+$Au, and Au$+$Au collisions at $\sqrt{s_{_{NN}}}=62.4$--200~GeV and implications for particle-production models

Author

Adler, S. S., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., Al-Jamel, A., Alexander, J., Aoki, K., Aphecetche, L., Armendariz, R., Aronson, S. H., Averbeck, R., Awes, T. C., Azmoun, B., Babintsev, V., Baldisseri, A., Barish, K. N., Barnes, P. D., Bassalleck, B., Bathe, S., Batsouli, S., Baublis, V., Bauer, F., Bazilevsky, A., Belikov, S., Bennett, R., Berdnikov, Y., Bjorndal, M. T., Boissevain, J. G., Borel, H., Boyle, K., Brooks, M. L., Brown, D. S., Bruner, N., Bucher, D., Buesching, H., Bumazhnov, V., Bunce, G., Burward-Hoy, J. M., Butsyk, S., Camard, X., Campbell, S., Chai, J. -S., Chand, P., Chang, W. C., Chernichenko, S., Chi, C. Y., Chiba, J., Chiu, M., Choi, I. J., Choudhury, R. K., Chujo, T., Cianciolo, V., Cleven, C. R., Cobigo, Y., Cole, B. A., Comets, M. P., Constantin, P., Csanád, M., Csörgő, T., Cussonneau, J. P., Dahms, T., Das, K., David, G., Deák, F., Delagrange, H., Denisov, A., d'Enterria, D., Deshpande, A., Desmond, E. J., Devismes, A., Dietzsch, O., Dion, A., Drachenberg, J. L., Drapier, O., Drees, A., Dubey, A. K., Durum, A., Dutta, D., Dzhordzhadze, V., Efremenko, Y. V., Egdemir, J., Enokizono, A., En'yo, H., Espagnon, B., Esumi, S., Fields, D. E., Finck, C., Fleuret, F., Fokin, S. L., Forestier, B., Fox, B. D., Fraenkel, Z., Frantz, J. E., Franz, A., Frawley, A. D., Fukao, Y., Fung, S. -Y., Gadrat, S., Gastineau, F., Germain, M., Glenn, A., Gonin, M., Gosset, J., Goto, Y., de Cassagnac, R. Granier, Grau, N., Greene, S. V., Perdekamp, M. Grosse, Gunji, T., Gustafsson, H. -Å., Hachiya, T., Henni, A. Hadj, Haggerty, J. S., Hagiwara, M. N., Hamagaki, H., Hansen, A. G., Harada, H., Hartouni, E. P., Haruna, K., Harvey, M., Haslum, E., Hasuko, K., Hayano, R., He, X., Heffner, M., Hemmick, T. K., Heuser, J. M., Hidas, P., Hiejima, H., Hill, J. C., Hobbs, R., Holmes, M., Holzmann, W., Homma, K., Hong, B., Hoover, A., Horaguchi, T., Hur, M. G., Ichihara, T., Iinuma, H., Ikonnikov, V. V., Imai, K., Inaba, M., Inuzuka, M., Isenhower, D., Isenhower, L., Ishihara, M., Isobe, T., Issah, M., Isupov, A., Jacak, B. V., Jia, J., Jin, J., Jinnouchi, O., Johnson, B. M., Johnson, S. C., Joo, K. S., Jouan, D., Kajihara, F., Kametani, S., Kamihara, N., Kaneta, M., Kang, J. H., Katou, K., Kawabata, T., Kawagishi, T., Kazantsev, A. V., Kelly, S., Khachaturov, B., Khanzadeev, A., Kikuchi, J., Kim, D. J., Kim, E., Kim, E. J., Kim, G. -B., Kim, H. J., Kim, Y. -S., Kinney, E., Kiss, Á., Kistenev, E., Kiyomichi, A., Klein-Boesing, C., Kobayashi, H., Kochenda, L., Kochetkov, V., Kohara, R., Komkov, B., Konno, M., Kotchetkov, D., Kozlov, A., Kroon, P. J., Kuberg, C. H., Kunde, G. J., Kurihara, N., Kurita, K., Kweon, M. J., Kwon, Y., Kyle, G. S., Lacey, R., Lajoie, J. G., Lebedev, A., Bornec, Y. Le, Leckey, S., Lee, D. M., Lee, M. K., Leitch, M. J., Leite, M. A. L., Li, X. H., Lim, H., Litvinenko, A., Liu, M. X., Maguire, C. F., Makdisi, Y. I., Malakhov, A., Malik, M. D., Manko, V. I., Mao, Y., Martinez, G., Masui, H., Matathias, F., Matsumoto, T., McCain, M. C., McGaughey, P. L., Miake, Y., Miller, T. E., Milov, A., Mioduszewski, S., Mishra, G. C., Mitchell, J. T., Mohanty, A. K., Morrison, D. P., Moss, J. M., Moukhanova, T. V., Mukhopadhyay, D., Muniruzzaman, M., Murata, J., Nagamiya, S., Nagata, Y., Nagle, J. L., Naglis, M., Nakamura, T., Newby, J., Nguyen, M., Norman, B. E., Nyanin, A. S., Nystrand, J., O'Brien, E., Ogilvie, C. A., Ohnishi, H., Ojha, I. D., Okada, K., Omiwade, O. O., Oskarsson, A., Otterlund, I., Oyama, K., Ozawa, K., Pal, D., Palounek, A. P. T., Pantuev, V., Papavassiliou, V., Park, J., Park, W. J., Pate, S. F., Pei, H., Penev, V., Peng, J. -C., Pereira, H., Peresedov, V., Peressounko, D. Yu., Pierson, A., Pinkenburg, C., Pisani, R. P., Purschke, M. L., Purwar, A. K., Qu, H., Qualls, J. M., Rak, J., Ravinovich, I., Read, K. F., Reuter, M., Reygers, K., Riabov, V., Riabov, Y., Roche, G., Romana, A., Rosati, M., Rosendahl, S. S. E., Rosnet, P., Rukoyatkin, P., Rykov, V. L., Ryu, S. S., Sahlmueller, B., Saito, N., Sakaguchi, T., Sakai, S., Samsonov, V., Sanfratello, L., Santo, R., Sato, H. D., Sato, S., Sawada, S., Schutz, Y., Semenov, V., Seto, R., Sharma, D., Shea, T. K., Shein, I., Shibata, T. -A., Shigaki, K., Shimomura, M., Shohjoh, T., Shoji, K., Sickles, A., Silva, C. L., Silvermyr, D., Sim, K. S., Singh, C. P., Singh, V., Skutnik, S., Smith, W. C., Soldatov, A., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Staley, F., Stankus, P. W., Stenlund, E., Stepanov, M., Ster, A., Stoll, S. P., Sugitate, T., Suire, C., Sullivan, J. P., Sziklai, J., Tabaru, T., Takagi, S., Takagui, E. M., Taketani, A., Tanaka, K. H., Tanaka, Y., Tanida, K., Tannenbaum, M. J., Taranenko, A., Tarján, P., Thomas, T. L., Togawa, M., Tojo, J., Torii, H., Towell, R. S., Tram, V-N., Tserruya, I., Tsuchimoto, Y., Tuli, S. K., Tydesjö, H., Tyurin, N., Uam, T. J., Vale, C., Valle, H., van Hecke, H. W., Velkovska, J., Velkovsky, M., Vértesi, R., Veszprémi, V., Vinogradov, A. A., Volkov, M. A., Vznuzdaev, E., Wagner, M., Wang, X. R., Watanabe, Y., Wessels, J., White, S. N., Willis, N., Winter, D., Wohn, F. K., Woody, C. L., Wysocki, M., Xie, W., Yanovich, A., Yokkaichi, S., Young, G. R., Younus, I., Yushmanov, I. E., Zajc, W. A., Zaudtke, O., Zhang, C., Zhou, S., Zimányi, J., Zolin, L., and Zong, X.

Subjects
Nuclear Experiment
Abstract

Measurements of the midrapidity transverse energy distribution, $d\Et/d\eta$, are presented for $p$$+$$p$, $d$$+$Au, and Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV and additionally for Au$+$Au collisions at $\sqrt{s_{_{NN}}}=62.4$ and 130 GeV. The $d\Et/d\eta$ distributions are first compared with the number of nucleon participants $N_{\rm part}$, number of binary collisions $N_{\rm coll}$, and number of constituent-quark participants $N_{qp}$ calculated from a Glauber model based on the nuclear geometry. For Au$+$Au, $\mean{d\Et/d\eta}/N_{\rm part}$ increases with $N_{\rm part}$, while $\mean{d\Et/d\eta}/N_{qp}$ is approximately constant for all three energies. This indicates that the two component ansatz, $dE_{T}/d\eta \propto (1-x) N_{\rm part}/2 + x N_{\rm coll}$, which has been used to represent $E_T$ distributions, is simply a proxy for $N_{qp}$, and that the $N_{\rm coll}$ term does not represent a hard-scattering component in $E_T$ distributions. The $dE_{T}/d\eta$ distributions of Au$+$Au and $d$$+$Au are then calculated from the measured $p$$+$$p$ $E_T$ distribution using two models that both reproduce the Au$+$Au data. However, while the number-of-constituent-quark-participant model agrees well with the $d$$+$Au data, the additive-quark model does not., Comment: 391 authors, 24 pages, 19 figures, and 15 Tables. Submitted to Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are publicly available at http://www.phenix.bnl.gov/papers.html

Published
2013
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24. Direct photon production in d+Au collisions at sqrt(s_NN)=200 GeV

Author

Adare, A., Adler, S. S., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., Al-Bataineh, H., Al-Jamel, A., Alexander, J., Angerami, A., Aoki, K., Apadula, N., Aphecetche, L., Aramaki, Y., Armendariz, R., Aronson, S. H., Asai, J., Atomssa, E. T., Averbeck, R., Awes, T. C., Azmoun, B., Babintsev, V., Bai, M., Baksay, G., Baksay, L., Baldisseri, A., Barish, K. N., Barnes, P. D., Bassalleck, B., Basye, A. T., Bathe, S., Batsouli, S., Baublis, V., Bauer, F., Baumann, C., Bazilevsky, A., Belikov, S., Belmont, R., Bennett, R., Berdnikov, A., Berdnikov, Y., Bhom, J. H., Bickley, A. A., Bjorndal, M. T., Blau, D. S., Boissevain, J. G., Bok, J. S., Borel, H., Boyle, K., Brooks, M. L., Brown, D. S., Bruner, N., Bucher, D., Buesching, H., Bumazhnov, V., Bunce, G., Burward-Hoy, J. M., Butsyk, S., Camacho, C. M., Camard, X., Campbell, S., Caringi, A., Chand, P., Chang, B. S., Chang, W. C., Charvet, J. -L., Chen, C. -H., Chernichenko, S., Chi, C. Y., Chiba, J., Chiu, M., Choi, I. J., Choi, J. B., Choudhury, R. K., Christiansen, P., Chujo, T., Chung, P., Churyn, A., Chvala, O., Cianciolo, V., Citron, Z., Cobigo, Y., Cole, B. A., Comets, M. P., del Valle, Z. Conesa, Connors, M., Constantin, P., Csanád, M., Csörgő, T., Cussonneau, J. P., Dahms, T., Dairaku, S., Danchev, I., Das, K., Datta, A., David, G., Dayananda, M. K., Deák, F., Delagrange, H., Denisov, A., d'Enterria, D., Deshpande, A., Desmond, E. J., Devismes, A., Dharmawardane, K. V., Dietzsch, O., Dion, A., Donadelli, M., Drachenberg, J. L., Drapier, O., Drees, A., Drees, K. A., Dubey, A. K., Durham, J. M., Durum, A., Dutta, D., Dzhordzhadze, V., D'Orazio, L., Edwards, S., Efremenko, Y. V., Ellinghaus, F., Engelmore, T., Enokizono, A., En'yo, H., Espagnon, B., Esumi, S., Eyser, K. O., Fadem, B., Fields, D. E., Finck, C., Finger, M., Finger Jr, M., Fleuret, F., Fokin, S. L., Fox, B. D., Fraenkel, Z., Frantz, J. E., Franz, A., Frawley, A. D., Fujiwara, K., Fukao, Y., Fung, S. -Y., Fusayasu, T., Gadrat, S., Garishvili, I., Germain, M., Glenn, A., Gong, H., Gonin, M., Gosset, J., Goto, Y., de Cassagnac, R. Granier, Grau, N., Greene, S. V., Grim, G., Perdekamp, M. Grosse, Gunji, T., Gustafsson, H. -Å., Hachiya, T., Henni, A. Hadj, Haggerty, J. S., Hahn, K. I., Hamagaki, H., Hamblen, J., Han, R., Hanks, J., Hansen, A. G., Hartouni, E. P., Haruna, K., Harvey, M., Haslum, E., Hasuko, K., Hayano, R., He, X., Heffner, M., Hemmick, T. K., Hester, T., Heuser, J. M., Hidas, P., Hiejima, H., Hill, J. C., Hobbs, R., Hohlmann, M., Holzmann, W., Homma, K., Hong, B., Hoover, A., Horaguchi, T., Hornback, D., Huang, S., Ichihara, T., Ichimiya, R., Iinuma, H., Ikeda, Y., Ikonnikov, V. V., Imai, K., Imrek, J., Inaba, M., Inuzuka, M., Isenhower, D., Isenhower, L., Ishihara, M., Isobe, T., Issah, M., Isupov, A., Ivanischev, D., Iwanaga, Y., Jacak, B. V., Jia, J., Jiang, X., Jin, J., Jinnouchi, O., Johnson, B. M., Johnson, S. C., Jones, T., Joo, K. S., Jouan, D., Jumper, D. S., Kajihara, F., Kametani, S., Kamihara, N., Kamin, J., Kaneta, M., Kang, J. H., Kapustinsky, J., Karatsu, K., Kasai, M., Katou, K., Kawabata, T., Kawall, D., Kawashima, M., Kazantsev, A. V., Kelly, S., Kempel, T., Khachaturov, B., Khanzadeev, A., Kijima, K. M., Kikuchi, J., Kim, A., Kim, B. I., Kim, D. H., Kim, D. J., Kim, E., Kim, E. -J., Kim, E. J., Kim, G. -B., Kim, H. J., Kim, S. H., Kim, Y. -J., Kinney, E., Kiriluk, K., Kiss, Á., Kistenev, E., Kiyomichi, A., Klay, J., Klein-Boesing, C., Kleinjan, D., Kobayashi, H., Kochenda, L., Kochetkov, V., Kohara, R., Komkov, B., Konno, M., Koster, J., Kotchetkov, D., Kozlov, A., Král, A., Kravitz, A., Kroon, P. J., Kuberg, C. H., Kunde, G. J., Kurita, K., Kurosawa, M., Kweon, M. J., Kwon, Y., Kyle, G. S., Lacey, R., Lai, Y. S., Lajoie, J. G., Layton, D., Lebedev, A., Bornec, Y. Le, Leckey, S., Lee, D. M., Lee, J., Lee, K. B., Lee, K. S., Lee, T., Leitch, M. J., Leite, M. A. L., Lenzi, B., Li, X., Li, X. H., Lichtenwalner, P., Liebing, P., Lim, H., Levy, L. A. Linden, Liška, T., Litvinenko, A., Liu, H., Liu, M. X., Love, B., Lynch, D., Maguire, C. F., Makdisi, Y. I., Malakhov, A., Malik, M. D., Manko, V. I., Mannel, E., Mao, Y., Martinez, G., Mašek, L., Masui, H., Matathias, F., Matsumoto, T., McCain, M. C., McCumber, M., McGaughey, P. L., Means, N., Meredith, B., Miake, Y., Mibe, T., Mignerey, A. C., Mikeš, P., Miki, K., Miller, T. E., Milov, A., Mioduszewski, S., Mishra, G. C., Mishra, M., Mitchell, J. T., Mohanty, A. K., Moon, H. J., Morino, Y., Morreale, A., Morrison, D. P., Moss, J. M., Moukhanova, T. V., Mukhopadhyay, D., Muniruzzaman, M., Murakami, T., Murata, J., Nagamiya, S., Nagle, J. L., Naglis, M., Nagy, M. I., Nakagawa, I., Nakamiya, Y., Nakamura, K. R., Nakamura, T., Nakano, K., Nam, S., Newby, J., Nguyen, M., Nihashi, M., Niita, T., Nouicer, R., Nyanin, A. S., Nystrand, J., Oakley, C., O'Brien, E., Oda, S. X., Ogilvie, C. A., Ohnishi, H., Ojha, I. D., Oka, M., Okada, K., Onuki, Y., Oskarsson, A., Otterlund, I., Ouchida, M., Oyama, K., Ozawa, K., Pak, R., Pal, D., Palounek, A. P. T., Pantuev, V., Papavassiliou, V., Park, I. H., Park, J., Park, S. K., Park, W. J., Pate, S. F., Pei, H., Penev, V., Peng, J. -C., Pereira, H., Peresedov, V., Peressounko, D. Yu., Petti, R., Pierson, A., Pinkenburg, C., Pisani, R. P., Proissl, M., Purschke, M. L., Purwar, A. K., Qu, H., Qualls, J. M., Rak, J., Rakotozafindrabe, A., Ravinovich, I., Read, K. F., Rembeczki, S., Reuter, M., Reygers, K., Riabov, V., Riabov, Y., Richardson, E., Roach, D., Roche, G., Rolnick, S. D., Romana, A., Rosati, M., Rosen, C. A., Rosendahl, S. S. E., Rosnet, P., Rukoyatkin, P., Ružička, P., Rykov, V. L., Ryu, S. S., Sahlmueller, B., Saito, N., Sakaguchi, T., Sakai, S., Sakashita, K., Samsonov, V., Sanfratello, L., Sano, S., Santo, R., Sato, H. D., Sato, S., Sato, T., Sawada, S., Schutz, Y., Sedgwick, K., Seele, J., Seidl, R., Semenov, A. Yu., Semenov, V., Seto, R., Sharma, D., Shea, T. K., Shein, I., Shibata, T. -A., Shigaki, K., Shimomura, M., Shoji, K., Shukla, P., Sickles, A., Silva, C. L., Silvermyr, D., Silvestre, C., Sim, K. S., Singh, B. K., Singh, C. P., Singh, V., Slunečka, M., Soldatov, A., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Staley, F., Stankus, P. W., Stenlund, E., Stepanov, M., Ster, A., Stoll, S. P., Sugitate, T., Suire, C., Sukhanov, A., Sullivan, J. P., Sziklai, J., Takagi, S., Takagui, E. M., Taketani, A., Tanabe, R., Tanaka, K. H., Tanaka, Y., Taneja, S., Tanida, K., Tannenbaum, M. J., Tarafdar, S., Taranenko, A., Tarján, P., Themann, H., Thomas, D., Thomas, T. L., Togawa, M., Toia, A., Tojo, J., Tomášek, L., Tomita, Y., Torii, H., Towell, R. S., Tram, V-N., Tserruya, I., Tsuchimoto, Y., Tydesjö, H., Tyurin, N., Uam, T. J., Vale, C., Valle, H., van Hecke, H. W., Vazquez-Zambrano, E., Veicht, A., Velkovska, J., Velkovsky, M., Vértesi, R., Veszprémi, V., Vinogradov, A. A., Virius, M., Volkov, M. A., Vrba, V., Vznuzdaev, E., Wang, X. R., Watanabe, D., Watanabe, K., Watanabe, Y., Wei, F., Wei, R., Wessels, J., White, S. N., Willis, N., Winter, D., Wohn, F. K., Woody, C. L., Wright, R. M., Wysocki, M., Xie, W., Yamaguchi, Y. L., Yamaura, K., Yang, R., Yanovich, A., Ying, J., Yokkaichi, S., You, Z., Young, G. R., Younus, I., Yushmanov, I. E., Zajc, W. A., Zaudtke, O., Zhang, C., Zhou, S., Zimányi, J., Zolin, L., and Zong, X.

Subjects
Nuclear Experiment
Abstract

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

Published
2012
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26. Single Electrons from Heavy Flavor Decays in p+p Collisions at sqrt(s) = 200 GeV

Author

PHENIX Collaboration, Adler, S. S., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., Alexander, J., Amirikas, R., Aphecetche, L., Aronson, S. H., Averbeck, R., Awes, T. C., Azmoun, R., Babintsev, V., Baldisseri, A., Barish, K. N., Barnes, P. D., Bassalleck, B., Bathe, S., Batsouli, S., Baublis, V., Bazilevsky, A., Belikov, S., Berdnikov, Y., Bhagavatula, S., Boissevain, J. G., Borel, H., Borenstein, S., Brooks, M. L., Brown, D. S., Bruner, N., Bucher, D., Buesching, H., Bumazhnov, V., Bunce, G., Burward-Hoy, J. M., Butsyk, S., Camard, X., Chai, J. -S., Chand, P., Chang, W. C., Chernichenko, S., Chi, C. Y., Chiba, J., Chiu, M., Choi, I. J., Choi, J., Choudhury, R. K., Chujo, T., Cianciolo, V., Cobigo, Y., Cole, B. A., Constantin, P., d'Enterria, D., David, G., Delagrange, H., Denisov, A., Deshpande, A., Desmond, E. J., Devismes, A., Dietzsch, O., Drapier, O., Drees, A., du~Rietz, R., Durum, A., Dutta, D., Efremenko, Y. V., El~Chenawi, K., Enokizono, A., En'yo, H., Esumi, S., Ewell, L., Fields, D. E., Fleuret, F., Fokin, S. L., Fox, B. D., Fraenkel, Z., Frantz, J. E., Franz, A., Frawley, A. D., Fung, S. -Y., Garpman, S., Ghosh, T. K., Glenn, A., Gogiberidze, G., Gonin, M., Gosset, J., Goto, Y., Granier~de~Cassagnac, R., Grau, N., Greene, S. V., Grosse~Perdekamp, M., Guryn, W., Gustafsson, H. -Å., Hachiya, T., Haggerty, J. S., Hamagaki, H., Hansen, A. G., Hartouni, E. P., Harvey, M., Hayano, R., Hayashi, N., He, X., Heffner, M., Hemmick, T. K., Heuser, J. M., Hibino, M., Hill, J. C., Holzmann, W., Homma, K., Hong, B., Hoover, A., Ichihara, T., Ikonnikov, V. V., Imai, K., Isenhower, D., Ishihara, M., Issah, M., Isupov, A., Jacak, B. V., Jang, W. Y., Jeong, Y., Jia, J., Jinnouchi, O., Johnson, B. M., Johnson, S. C., Joo, K. S., Jouan, D., Kametani, S., Kamihara, N., Kang, J. H., Kapoor, S. S., Katou, K., Kelly, S., Khachaturov, B., Khanzadeev, A., Kikuchi, J., Kim, D. H., Kim, D. J., Kim, D. W., Kim, E., Kim, G. -B., Kim, H. J., Kistenev, E., Kiyomichi, A., Kiyoyama, K., Klein-Boesing, C., Kobayashi, H., Kochenda, L., Kochetkov, V., Koehler, D., Kohama, T., Kopytine, M., Kotchetkov, D., Kozlov, A., Kroon, P. J., Kuberg, C. H., Kurita, K., Kuroki, Y., Kweon, M. J., Kwon, Y., Kyle, G. S., Lacey, R., Ladygin, V., Lajoie, J. G., Lebedev, A., Leckey, S., Lee, D. M., Lee, S., Leitch, M. J., Li, X. H., Lim, H., Litvinenko, A., Liu, M. X., Liu, Y., Maguire, C. F., Makdisi, Y. I., Malakhov, A., Manko, V. I., Mao, Y., Martinez, G., Marx, M. D., Masui, H., Matathias, F., Matsumoto, T., McGaughey, P. L., Melnikov, E., Messer, F., Miake, Y., Milan, J., Miller, T. E., Milov, A., Mioduszewski, S., Mischke, R. E., Mishra, G. C., Mitchell, J. T., Mohanty, A. K., Morrison, D. P., Moss, J. M., Mühlbacher, F., Mukhopadhyay, D., Muniruzzaman, M., Murata, J., Nagamiya, S., Nagle, J. L., Nakamura, T., Nandi, B. K., Nara, M., Newby, J., Nilsson, P., Nyanin, A. S., Nystrand, J., O'Brien, E., Ogilvie, C. A., Ohnishi, H., Ojha, I. D., Okada, K., Ono, M., Onuchin, V., Oskarsson, A., Otterlund, I., Oyama, K., Ozawa, K., Pal, D., Palounek, A. P. T., Pantuev, V., Papavassiliou, V., Park, J., Parmar, A., Pate, S. F., Peitzmann, T., Peng, J. -C., Peresedov, V., Pinkenburg, C., Pisani, R. P., Plasil, F., Purschke, M. L., Purwar, A. K., Rak, J., Ravinovich, I., Read, K. F., Reuter, M., Reygers, K., Riabov, V., Riabov, Y., Roche, G., Romana, A., Rosati, M., Rosnet, P., Ryu, S. S., Sadler, M. E., Saito, N., Sakaguchi, T., Sakai, M., Sakai, S., Samsonov, V., Sanfratello, L., Santo, R., Sato, H. D., Sato, S., Sawada, S., Schutz, Y., Semenov, V., Seto, R., Shaw, M. R., Shea, T. K., Shibata, T. -A., Shigaki, K., Shiina, T., Silva, C. L., Silvermyr, D., Sim, K. S., Singh, C. P., Singh, V., Sivertz, M., Soldatov, A., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Staley, F., Stankus, P. W., Stenlund, E., Stepanov, M., Ster, A., Stoll, S. P., Sugitate, T., Sullivan, J. P., Takagui, E. M., Taketani, A., Tamai, M., Tanaka, K. H., Tanaka, Y., Tanida, K., Tannenbaum, M. J., Tarján, P., Tepe, J. D., Thomas, T. L., Tojo, J., Torii, H., Towell, R. S., Tserruya, I., Tsuruoka, H., Tuli, S. K., Tydesjö, H., Tyurin, N., van~Hecke, H. W., Velkovska, J., Velkovsky, M., Veszprémi, V., Villatte, L., Vinogradov, A. A., Volkov, M. A., Vznuzdaev, E., Wang, X. R., Watanabe, Y., White, S. N., Wohn, F. K., Woody, C. L., Xie, W., Yang, Y., Yanovich, A., Yokkaichi, S., Young, G. R., Yushmanov, I. E., Zajc, W. A., Zhang, C., Zhou, S., Zhou, S. J., and Zolin, L.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

The invariant differential cross section for inclusive electron production in $p + p$ collisions at $\sqrt{s} = 200$~GeV has been measured by the PHENIX experiment at the Relativistic Heavy Ion Collider over the transverse momentum range $0.4 \le p_T \le 5.0$~GeV/$c$ in the central rapidity region ($|\eta| \le 0.35$). The contribution to the inclusive electron spectrum from semileptonic decays of hadrons carrying heavy flavor, {\it i.e.} charm quarks or, at high $p_T$, bottom quarks, is determined via three independent methods. The resulting electron spectrum from heavy flavor decays is compared to recent leading and next-to-leading order perturbative QCD calculations. The total cross section of charm quark-antiquark pair production is determined to be $\sigma_{c\bar{c}} = 0.92 \pm 0.15 {\rm (stat.)} \pm 0.54 {\rm (sys.)}$~mb., Comment: 329 authors, 6 pages text, 3 figures. v2 is version accepted for publication in Phys. Rev. Lett. HEPdata tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

Published
2005
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28. Low Temperature Magnetic Domain Patterns in MnAs Films Grown on GaAs(001)

Author

Cheon, M., Hegde, S., Wang, S., Bishara, M. M., Kim, G. B., and Luo, H.

Subjects
Condensed Matter - Materials Science
Abstract

Magnetic properties of MnAs were studied as a function of temperature with a superconducting interference device (5 K to 350 K), and atomic force microscopy/magnetic force microscopy (20 K to 360 K). Structural and magnetic properties of MnAs depend on film thickness both near and far below the Curie temperature. In samples with coexisting ferromagnetic alpha-MnAs and paramagnetic beta-MnAs, the domain structures are affected by the distribution of two phases. The magnetic domain structures below the temperature range of this mixed phase resemble that of a single domain structure with uniform magnetization along the easy axis, except there are regions elongated along the easy axis embedded where the magnetization is along the second easy axis, i.e., normal to the films. The shape of those regions and their temperature dependence are also related to the MnAs layer thickness., Comment: 3 pages

Published
2004

29. Growth and properties of ferromagnetic In(1-x)Mn(x)Sb alloys

Author

Wojtowicz, T., Lim, W. L., Liu, X., Cywinski, G., Kutrowski, M., Titova, L. V., Yee, K., Dobrowolska, M., Furdyna, J. K., Yu, K. M., Walukiewicz, W., Kim, G. B., Cheon, M., Chen, X., Wang, S. M., Luo, H., Vurgaftman, I., and Meyer, J. R.

Subjects
Condensed Matter - Materials Science
Abstract

We discuss a new narrow-gap ferromagnetic (FM) semiconductor alloy, In(1-x)Mn(x)Sb, and its growth by low-temperature molecular-beam epitaxy. The magnetic properties were investigated by direct magnetization measurements, electrical transport, magnetic circular dichroism, and the magneto-optical Kerr effect. These data clearly indicate that In(1-x)Mn(x)Sb possesses all the attributes of a system with carrier-mediated FM interactions, including well-defined hysteresis loops, a cusp in the temperature dependence of the resistivity, strong negative magnetoresistance, and a large anomalous Hall effect. The Curie temperatures in samples investigated thus far range up to 8.5 K, which are consistent with a mean-field-theory simulation of the carrier-induced ferromagnetism based on the 8-band effective band-orbital method., Comment: Invited talk at 11th International Conference on Narrow Gap Semiconductors, Buffalo, New York, U.S.A., June 16 - 20, 2003

Published
2003
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30. In(1-x)Mn(x)Sb - a new narrow gap ferromagnetic semiconductor

Author

Wojtowicz, T., Cywinski, G., Lim, W. L., Liu, X., Dobrowolska, M., Furdyna, J. K., Yu, K. M., Walukiewicz, W., Kim, G. B., Cheon, M., Chen, X., Wang, S. M., and Luo, H.

Subjects
Condensed Matter - Materials Science
Abstract

A narrow-gap ferromagnetic In(1-x)Mn(x)Sb semiconductor alloy was successfully grown by low-temperature molecular beam epitaxy on CdTe/GaAs hybrid substrates. Ferromagnetic order in In(1-x)Mn(x)Sb was unambiguously established by the observation of clear hysteresis loops both in direct magnetization measurements and in the anomalous Hall effect, with Curie temperatures T_C ranging up to 8.5 K. The observed values of T_C agree well with the existing models of carrier-induced ferromagnetism., Comment: 12 pages, 3 figures

Published
2003
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38. Search for solar axions with CsI(Tl) crystal detectors

Author

Yoon, Y. S., Park, H. K., Bhang, H., Choi, J. H., Choi, S., Hahn, I. S., Jeon, E. J., Joo, H. W., Kang, W. G., Kim, B. H., Kim, G. B., Kim, H. J., Kim, K. W., Kim, S. C., Kim, S. K., Kim, Y. D., Kim, Y. H., Lee, H. S., Lee, J. H., Lee, J. K., Leonard, D. S., Li, J., Myung, S. S., Olsen, S. L., So, J. H., and The KIMS collaboration

Published
2016
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39. Absolute Decay Counting of $$^{146}$$Sm and $$^{147}$$Sm for Early Solar System Chronology

Author

Kim, G. B., primary, Borg, L. E., additional, Boyd, S. T. P., additional, Cantor, R. H., additional, Despotopulos, J. D., additional, Drury, O. B., additional, Friedrich, S., additional, Gallant, A., additional, Hines, N. R., additional, Jacobs, A., additional, Jovanovic, I., additional, Kmak, K. N., additional, Kavner, A. R. L., additional, Kim, Y. H., additional, Kunz, P., additional, Kwiatkowski, A., additional, Kwon, D. H., additional, Lee, D., additional, Murböck, T., additional, Scielzo, N. D., additional, Shollenberger, Q. R., additional, Sio, C. K. I., additional, Thomas, K. J., additional, Wooddy, T., additional, and Walls, C., additional

Published
2022
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46. Response of the CALICE Si-W electromagnetic calorimeter physics prototype to electrons

Author

Adloff, C., Karyotakis, Y., Repond, J., Yu, J., Eigen, G., Hawkes, C.M., Mikami, Y., Miller, O., Watson, N.K., Wilson, J.A., Goto, T., Mavromanolakis, G., Thomson, M.A., Ward, D.R., Yan, W., Benchekroun, D., Hoummada, A., Krim, M., Benyamna, M., Boumediene, D., Brun, N., Cârloganu, C., Gay, P., Morisseau, F., Blazey, G.C., Chakraborty, D., Dyshkant, A., Francis, K., Hedin, D., Lima, G., Zutshi, V., Hostachy, J.-Y., Morin, L., D’Ascenzo, N., Cornett, U., David, D., Fabbri, R., Falley, G., Gadow, K., Garutti, E., Göttlicher, P., Jung, T., Karstensen, S., Korbel, V., Lucaci-Timoce, A.-I., Lutz, B., Meyer, N., Morgunov, V., Reinecke, M., Sefkow, F., Smirnov, P., Vargas-Trevino, A., Wattimena, N., Wendt, O., Feege, N., Groll, M., Haller, J., Heuer, R.-D., Richter, S., Samson, J., Kaplan, A., Schultz-Coulon, H.-Ch., Shen, W., Tadday, A., Bilki, B., Norbeck, E., Onel, Y., Kim, E.J., Baek, N.I., Kim, D.-W., Lee, K., Lee, S.C., Kawagoe, K., Tamura, Y., Bowerman, D.A., Dauncey, P.D., Magnan, A.-M., Yilmaz, H., Zorba, O., Bartsch, V., Postranecky, M., Warren, M., Wing, M., Faucci Giannelli, M., Green, M.G., Salvatore, F., Bedjidian, M., Kieffer, R., Laktineh, I., Bailey, D.S., Barlow, R.J., Kelly, M., Thompson, R.J., Danilov, M., Tarkovsky, E., Baranova, N., Karmanov, D., Korolev, M., Merkin, M., Voronin, A., Frey, A., Lu, S., Prothmann, K., Simon, F., Bouquet, B., Callier, S., Cornebise, P., Fleury, J., Li, H., Richard, F., de la Taille, Ch., Poeschl, R., Raux, L., Ruan, M., Seguin-Moreau, N., Wicek, F., Anduze, M., Boudry, V., Brient, J.-C., Gaycken, G., Mora e Freitas, P., Musat, G., Reinhard, M., Rougé, A., Vanel, J.-Ch., Videau, H., Park, K.-H., Zacek, J., Cvach, J., Gallus, P., Havranek, M., Janata, M., Marcisovsky, M., Polak, I., Popule, J., Tomasek, L., Tomasek, M., Ruzicka, P., Sicho, P., Smolik, J., Vrba, V., Zalesak, J., Belhorma, B., Belmir, M., Nam, S.W., Park, I.H., Yang, J., Chai, J.-S., Kim, J.-T., Kim, G.-B., Kang, J., and Kwon, Y.-J.

Published
2009
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