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1,982 results on '"Lee, W. J."'

3. Measurement of cosmogenic $^9$Li and $^8$He production rates at RENO

Author

Lee, H. G., Choi, J. H., Jang, H. I., Jang, J. S., Jeon, S. H., Joo, K. K., Jung, D. E., Kim, J. G., Kim, J. H., Kim, J. Y., Kim, S. B., Kim, S. Y., Kim, W., Kwon, E., Lee, D. H., Lee, W. J., Lim, I. T., Moon, D. H., Pac, M. Y., Park, J. S., Park, R. G., Seo, H., Seo, J. W., Shin, C. D., Yang, B. S., Yoo, J., Yoon, S. G., Yeo, I. S., and Yu, I.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

We report the measured production rates of unstable isotopes $^9$Li and $^8$He produced by cosmic muon spallation on $^{12}$C using two identical detectors of the RENO experiment. Their beta-decays accompanied by a neutron make a significant contribution to backgrounds of reactor antineutrino events in precise determination of the smallest neutrino mixing angle. The mean muon energy of its near (far) detector with an overburden of 120 (450) m.w.e. is estimated as 33.1 +- 2.3 (73.6 +- 4.4) GeV. Based on roughly 3100 days of data, the cosmogenic production rate of $^9$Li ($^8$He) isotope is measured to be 44.2 +- 3.1 (10.6 +- 7.4) per day at near detector and 10.0 +- 1.1 (2.1 +- 1.5) per day at far detector. This corresponds to yields of $^9$Li ($^8$He), 4.80 +- 0.36 (1.15 +- 0.81) and 9.9 +- 1.1 (2.1 +- 1.5) at near and far detectors, respectively, in a unit of 10$^{-8}$ $\mu^{-1}$ g${^-1}$ cm${^2}$. Combining the measured $^9$Li yields with other available underground measurements, an excellent power-law relationship of the yield with respect to the mean muon energy is found to have an exponent of $\alpha$ = 0.75 +- 0.05., Comment: 11 pages, 14 figures

Published
2022
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7. Exotic low-energy excitations emergent in the random Kitaev magnet Cu$_2$IrO$_3$

Author

Choi, Y. S., Lee, C. H., Lee, S., Yoon, Sungwon, Lee, W. -J., Park, J., Ali, Anzar, Singh, Yogesh, Orain, Jean-Christophe, Kim, Gareoung, Rhyee, Jong-Soo, Chen, Wei-Tin, Chou, Fangcheng, and Choi, Kwang-Yong

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

We report on magnetization $M(H)$, dc/ac magnetic susceptibility $\chi(T)$, specific heat $C_{\mathrm{m}}(T)$ and muon spin relaxation ($\mu$SR) measurements of the Kitaev honeycomb iridate Cu$_2$IrO$_2$ with quenched disorder. In spite of the chemical disorders, we find no indication of spin glass down to 260~mK from the $C_{\mathrm{m}}(T)$ and $\mu$SR data. Furthermore, a persistent spin dynamics observed by the zero-field muon spin relaxation evidences an absence of static magnetism. The remarkable observation is a scaling relation of $\chi[H,T]$ and $M[H,T]$ in $H/T$ with the scaling exponent $\alpha=0.26-0.28$, expected from bond randomness. However, $C_{\mathrm{m}}[H,T]/T$ disobeys the predicted universal scaling law, pointing towards the presence of low-lying excitations in addition to random singlets. Our results signify an intriguing role of quenched disorder in a Kitaev spin system in creating low-energy excitations possibly pertaining to Z$_2$ fluxes.

Published
2018
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9. Putative spin liquid in the triangle-based iridate Ba$_3$IrTi$_2$O$_9$

Author

Lee, W. -J., Do, S. -H., Yoon, Sungwon, Lee, S., Choi, Y. S., Jang, D. J., Brando, M., Lee, M., Choi, E. S., Ji, S., Jang, Z. H., Suh, B. J., and Choi, K. -Y.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science
Abstract

We report on thermodynamic, magnetization, and muon spin relaxation measurements of the strong spin-orbit coupled iridate Ba$_3$IrTi$_2$O$_9$, which constitutes a new frustration motif made up a mixture of edge- and corner-sharing triangles. In spite of strong antiferromagnetic exchange interaction of the order of 100~K, we find no hint for long-range magnetic order down to 23 mK. The magnetic specific heat data unveil the $T$-linear and -squared dependences at low temperatures below 1~K. At the respective temperatures, the zero-field muon spin relaxation features a persistent spin dynamics, indicative of unconventional low-energy excitations. A comparison to the $4d$ isostructural compound Ba$_3$RuTi$_2$O$_9$ suggests that a concerted interplay of compass-like magnetic interactions and frustrated geometry promotes a dynamically fluctuating state in a triangle-based iridate., Comment: Physical Review B accepted

Published
2017
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11. Physics Potentials with the Second Hyper-Kamiokande Detector in Korea

Author

proto-collaboration, Hyper-Kamiokande, Abe, K., Abe, Ke., Ahn, S. H., Aihara, H., Aimi, A., Akutsu, R., Andreopoulos, C., Anghel, I., Anthony, L. H. V., Antonova, M., Ashida, Y., Aushev, V., Barbi, M., Barker, G. J., Barr, G., Beltrame, P., Berardi, V., Bergevin, M., Berkman, S., Berns, L., Berry, T., Bhadra, S., no, D. Bravo-Bergu, Blaszczyk, F. d. M., Blondel, A., Bolognesi, S., Boyd, S. B., Bravar, A., Bronner, C., Avanzini, M. Buizza, Cafagna, F. S., Cheon, B. G., Cheoun, M. K., Cho, K., Choi, K. Y., Chun, E. J., Cole, A., Calland, R., Cao, S., Cartwright, S. L., Catanesi, M. G., Checchia, C., Chen-Wishart, Z., Choi, J. H., Choi, K., Coleman, J., Collazuol, G., Cowan, G., Cremonesi, L., Dealtry, T., De Rosa, G., Densham, C., Dewhurst, D., Drakopoulou, E. L., Di Lodovico, F., Drapier, O., Dumarchez, J., Dunne, P., Dziewiecki, M., Emery, S., Esmaili, A., Evangelisti, A., Fernandez-Martinez, E., Feusels, T., Finch, A., Fiorentini, G. A., Fiorillo, G., Fitton, M., Frankiewicz, K., Friend, M., Fujii, Y., Fukuda, Y., Fukuda, D., Ganezer, K., Ghosh, M., Giganti, C., Gonin, M., Grant, N., Gumplinger, P., Hadley, D. R., Hartfiel, B., Hartz, M., Hayato, Y., Hayrapetyan, K., Hill, J., Hirota, S., Horiuchi, S., Ichikawa, A. K., Iijima, T., Ikeda, M., Imber, J., Inoue, K., Insler, J., Intonti, R. A., Ioannisian, A., Ishida, T., Ishino, H., Ishitsuka, M., Itow, Y., Iwamoto, K., Izmaylov, A., Jamieson, B., Jang, H. I., Jang, J. S., Jeon, S. H., Jeong, K. S., Jiang, M., Jonsson, P., Joo, K. K., Kaboth, A., Kachulis, C., Kajita, T., Kang, S. K., Kameda, J., Kataoka, Y., Katori, T., Kayrapetyan, K., Kearns, E., Khabibullin, M., Khotjantsev, A., Kim, C. S., Kim, H. B., Kim, H. J., Kim, J. H., Kim, J. -S., Kim, J. Y., Kim, S. B., Kim, S. C., Kim, S. -W., Kim, S. Y., King, S., Kim, T. J., Kim, W., Kishimoto, Y., Ko, P., Kobayashi, T., Koga, M., Konaka, A., Kormos, L. L., Koshio, Y., Korzenev, A., Kowalik, K. L., Kropp, W. R., Kudenko, Y., Kurjata, R., Kutter, T., Kuze, M., Kwak, K., Kwon, E. H., Labarga, L., Lagoda, J., Lasorak, P. J. J., Laveder, M., Lawe, M., Learned, J. G., Lee, C. H., Lee, S. J., Lee, W. J., Lim, I. T., Lindner, T., Litchfield, R. P., Longhin, A., Loverre, P., Lou, T., Ludovici, L., Ma, W., Magaletti, L., Mahn, K., Malek, M., Maret, L., Mariani, C., Martens, K., Marti, Ll., Martin, J. F., Marzec, J., Matsuno, S., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Mefodiev, A., Mermod, P., Metelko, C., Mezzetto, M., Migenda, J., Mijakowski, P., Minakata, H., Minamino, A., Mine, S., Mineev, O., Mitra, A., Miura, M., Mochizuki, T., Monroe, J., Moon, C. S., Moon, D. H., Moriyama, S., Mueller, T., Muheim, F., Murase, K., Muto, F., Nakahata, M., Nakajima, Y., Nakamura, K., Nakaya, T., Nakayama, S., Nantais, C., Needham, M., Nicholls, T., Nishimura, Y., Noah, E., Nova, F., Nowak, J., Nunokawa, H., Obayashi, Y., Oh, Y. D., Oh, Y., O'Keeffe, H. M., Okajima, Y., Okumura, K., Onishchuk, Yu., O'Sullivan, E., O'Sullivan, L., Ovsiannikova, T., Owen, R. A., Oyama, Y., Pac, M. Y., Palladino, V., Palomino, J. L., Paolone, V., Park, H. S., Park, J. C., Park, M. G., Park, S. C., Parker, W., Parsa, S., Payne, D., Perkin, J. D., Pidcott, C., Guerra, E. Pinzon, Playfer, S., Popov, B., Posiadala-Zezula, M., Poutissou, J. -M., Pritchard, A., Prouse, N. W., Pronost, G., Przewlocki, P., Quilain, B., Quinto, M., Radicioni, E., Ratoff, P. N., Retiere, F., Riccio, C., Richards, B., Rondio, E., Rose, H. J., Rott, C., Rountree, S. D., Ruggeri, A. C., Rychter, A., Ryu, D., Sacco, R., Sakuda, M., Sanchez, M. C., Scantamburlo, E., Scott, M., Sedgwick, S. Molina, Seiya, Y., Sekiguchi, T., Sekiya, H., Seo, H., Seo, S. H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shimizu, I., Shiozawa, M., Shitov, Y., Short, S., Simpson, C., Sinnis, G., Smy, M. B., Snow, S., Sobczyk, J., Sobel, H. W., Son, D. C., Sonoda, Y., Spina, R., Stewart, T., Stone, J. L., Suda, Y., Suwa, Y., Suzuki, Y., Suzuki, A. T., Svoboda, R., Taani, M., Tacik, R., Takeda, A., Takenaka, A., Taketa, A., Takeuchi, Y., Takhistov, V., Tanaka, H. A., Tanaka, H. K. M., Tanaka, H., Terri, R., Thiesse, M., Thompson, L. F., Thorpe, M., Tobayama, S., Touramanis, C., Towstego, T., Tsukamoto, T., Tsui, K. M., Tzanov, M., Uchida, Y., Vagins, M. R., Vasseur, G., Vilela, C., Vogelaar, R. B., Walding, J., Walker, J., Ward, M., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilson, J. R., Won, E., Xin, T., Yamamoto, K., Yanagisawa, C., Yano, T., Yasuda, O., Yen, S., Yershov, N., Yeum, D. N., Yokoyama, M., Yoo, H. D., Yoo, J., Yoon, S. C., Yoon, T. S., Yoshida, T., Yu, I., Yu, M., Zalipska, J., Zaremba, K., Ziembicki, M., Zito, M., and Zsoldos, S.

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

Hyper-Kamiokande consists of two identical water-Cherenkov detectors of total 520~kt with the first one in Japan at 295~km from the J-PARC neutrino beam with 2.5$^{\textrm{o}}$ Off-Axis Angles (OAAs), and the second one possibly in Korea in a later stage. Having the second detector in Korea would benefit almost all areas of neutrino oscillation physics mainly due to longer baselines. There are several candidate sites in Korea with baselines of 1,000$\sim$1,300~km and OAAs of 1$^{\textrm{o}}$$\sim$3$^{\textrm{o}}$. We conducted sensitivity studies on neutrino oscillation physics for a second detector, either in Japan (JD $\times$ 2) or Korea (JD + KD) and compared the results with a single detector in Japan. Leptonic CP violation sensitivity is improved especially when the CP is non-maximally violated. The larger matter effect at Korean candidate sites significantly enhances sensitivities to non-standard interactions of neutrinos and mass ordering determination. Current studies indicate the best sensitivity is obtained at Mt. Bisul (1,088~km baseline, $1.3^\circ$ OAA). Thanks to a larger (1,000~m) overburden than the first detector site, clear improvements to sensitivities for solar and supernova relic neutrino searches are expected., Comment: 102 pages, 49 figures. Accepted by PTEP

Published
2016
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16. Enhanced Endurance Characteristics in High Performance 16nm Selector Only Memory (SOM)

Author

Park, I.-M., primary, Lee, K. W., additional, Park, J.-H., additional, Song, S. J., additional, Kim, T. Y., additional, Wu, Z., additional, Lee, W. J., additional, Choi, B. D., additional, Jeong, Y. J., additional, Oh, S. C., additional, Park, K., additional, Kuh, B. J., additional, Song, Y. J., additional, Shin, Y. G., additional, and Song, J. H., additional

Published
2023
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17. Artificial intelligence-derived ECG bio-index as a tool for predicting the prognosis of patients with ST-segment elevation myocardial infarction underwent primary percutaneous coronary intervention

Author

Jeon, K, primary, Lee, H S, additional, Jang, J H, additional, Kwon, J M, additional, Kang, S, additional, Son, J M, additional, Kwon, J S, additional, Cho, H W, additional, Kang, S H, additional, Lee, W J, additional, Yoon, C H, additional, Seo, J W, additional, Youn, T J, additional, and Chae, I H, additional

Published
2023
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26. P434 Upadacitinib improved fatigue and health-related quality of life in patients with moderately to severely active Crohn’s disease: Results from induction and maintenance phase 3 trials

Author

Ghosh, S, primary, Feagan, B, additional, Parra, R S, additional, Lopes, S, additional, Steinlauf, A, additional, Kakuta, Y, additional, Joshi, N, additional, Lee, W J, additional, Remple, V, additional, Lacerda, A P, additional, Zhou, Q, additional, Xuan, S, additional, and Louis, E, additional

Published
2023
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32. Scaling of Memory Performance and Capacity with CXL Memory Expander

Author

Park, S. J., primary, Kim, H., additional, Kim, K.-S., additional, So, J., additional, Ahn, J., additional, Lee, W.-J., additional, Kim, D., additional, Kim, Y.-J., additional, Seok, J., additional, Lee, J.-G., additional, Ryu, H.-Y., additional, Lee, C. Y., additional, Prout, J., additional, Ryoo, K.-C., additional, Han, S.-J., additional, Kook, M.-K., additional, Choi, J. S., additional, Gim, J., additional, Ki, Y. S., additional, Ryu, S., additional, Park, C., additional, Lee, D.-G., additional, Cho, J., additional, Song, H., additional, and Lee, J. Y., additional

Published
2022
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37. P380 Early improvement of endoscopic outcomes with risankizumab is associated with reduced hospitalisation and surgery rates in patients with Crohn’s disease

Author

Feagan, B G, primary, Colombel, J F, additional, Panaccione, R, additional, Schreiber, S, additional, Ferrante, M, additional, Kamikozuru, K, additional, Lee, W J, additional, Griffith, J, additional, Kligys, K, additional, Kalabic, J, additional, Chen, N, additional, and Dubinsky, M, additional

Published
2022
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46. Serous cystic neoplasm of the pancreas: a multinational study of 2622 patients under the auspices of the International Association of Pancreatology and European Pancreatic Club (European Study Group on Cystic Tumors of the Pancreas)

Author

Jais, B, Rebours, V, Malleo, G, Salvia, R, Fontana, M, Maggino, L, Bassi, C, Manfredi, R, Moran, R, Lennon, A M, Zaheer, A, Wolfgang, C, Hruban, R, Marchegiani, G, Fernández Del Castillo, C, Brugge, W, Ha, Y, Kim, M H, Oh, D, Hirai, I, Kimura, W, Jang, J Y, Kim, S W, Jung, W, Kang, H, Song, S Y, Kang, C M, Lee, W J, Crippa, S, Falconi, M, Gomatos, I, Neoptolemos, J, Milanetto, A C, Sperti, C, Ricci, C, Casadei, R, Bissolati, M, Balzano, G, Frigerio, I, Girelli, R, Delhaye, M, Bernier, B, Wang, H, Jang, K T, Song, D H, Huggett, M T, Oppong, K W, Pererva, L, Kopchak, K V, Del Chiaro, M, Segersvard, R, Lee, L S, Conwell, D, Osvaldt, A, Campos, V, Aguero Garcete, G, Napoleon, B, Matsumoto, I, Shinzeki, M, Bolado, F, Fernandez, J M Urman, Keane, M G, Pereira, S P, Acuna, I Araujo, Vaquero, E C, Angiolini, M R, Zerbi, A, Tang, J, Leong, R W, Faccinetto, A, Morana, G, Petrone, M C, Arcidiacono, P G, Moon, J H, Choi, H J, Gill, R S, Pavey, D, Ouaïssi, M, Sastre, B, Spandre, M, De Angelis, C G, Rios-Vives, M A, Concepcion-Martin, M, Ikeura, T, Okazaki, K, Frulloni, L, Messina, O, and Lévy, P

Published
2016
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