H
Hugon J Karwowski
Researcher at University of North Carolina at Chapel Hill
Publications - 169
Citations - 8794
Hugon J Karwowski is an academic researcher from University of North Carolina at Chapel Hill. The author has contributed to research in topics: Neutrino & Nuclear reaction. The author has an hindex of 29, co-authored 161 publications receiving 8005 citations. Previous affiliations of Hugon J Karwowski include North Carolina State University & University of Washington.
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Journal ArticleDOI
First results from KamLAND: evidence for reactor antineutrino disappearance.
K. Eguchi,Sanshiro Enomoto,K. Furuno,J. Goldman,H. Hanada,H. Ikeda,Kiyohiro Ikeda,Kunio Inoue,K. Ishihara,W. Itoh,T. Iwamoto,Tomoya Kawaguchi,T. Kawashima,H. Kinoshita,Yasuhiro Kishimoto,M. Koga,Y. Koseki,T. Maeda,T. Mitsui,M. Motoki,K. Nakajima,M. Nakajima,T. Nakajima,Hiroshi Ogawa,K. Owada,T. Sakabe,I. Shimizu,J. Shirai,F. Suekane,A. Suzuki,K. Tada,Osamu Tajima,T. Takayama,K. Tamae,Hideki Watanabe,J. Busenitz,Z. Djurcic,K. McKinny,Dongming Mei,A. Piepke,E. Yakushev,B. E. Berger,Y. D. Chan,M. P. Decowski,D. A. Dwyer,Stuart J. Freedman,Y. Fu,B. K. Fujikawa,K. M. Heeger,K. T. Lesko,K. B. Luk,Hitoshi Murayama,D. R. Nygren,C. E. Okada,A. W. P. Poon,H. M. Steiner,Lindley Winslow,G. A. Horton-Smith,R. D. McKeown,J. Ritter,B. Tipton,Petr Vogel,C. E. Lane,T. Miletic,Peter Gorham,G. Guillian,John G. Learned,J. Maricic,S. Matsuno,Sandip Pakvasa,S. Dazeley,S. Hatakeyama,M. Murakami,R. Svoboda,B. D. Dieterle,M. DiMauro,J. A. Detwiler,Giorgio Gratta,K. Ishii,N. Tolich,Y. Uchida,M. Batygov,W. M. Bugg,H. O. Cohn,Yuri Efremenko,Yuri Kamyshkov,A. Kozlov,Y. Nakamura,L. De Braeckeleer,L. De Braeckeleer,C. R. Gould,C. R. Gould,Hugon J Karwowski,Hugon J Karwowski,D. M. Markoff,D. M. Markoff,J. A. Messimore,J. A. Messimore,Koji Nakamura,Koji Nakamura,Ryan Rohm,Ryan Rohm,Werner Tornow,Werner Tornow,Albert Young,Albert Young,Y. F. Wang +106 more
TL;DR: In the context of two-flavor neutrino oscillations with CPT invariance, all solutions to the solar neutrinos problem except for the "large mixing angle" region are excluded.
Journal ArticleDOI
Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen.
A. Gando,Y. Gando,T. Hachiya,A. Hayashi,S. Hayashida,H. Ikeda,Kunio Inoue,Koji Ishidoshiro,Y. Karino,M. Koga,S. Matsuda,T. Mitsui,K. Nakamura,S. Obara,T. Oura,H. Ozaki,I. Shimizu,Y. Shirahata,J. Shirai,A. Suzuki,T. Takai,K. Tamae,Y. Teraoka,K. Ueshima,Hideki Watanabe,A. Kozlov,Y. Takemoto,S. Yoshida,Ken-Ichi Fushimi,T. I. Banks,B. E. Berger,B. K. Fujikawa,T. O'Donnell,Lindley Winslow,Yuri Efremenko,Hugon J Karwowski,D. M. Markoff,Werner Tornow,J. A. Detwiler,Sanshiro Enomoto,M. P. Decowski +40 more
TL;DR: An improved search for neutrinoless double-beta (0νββ) decay of ^{136}Xe in the KamLAND-Zen experiment is presented and a significant reduction of the xenon-loaded liquid scintillator contaminant identified in previous searches is achieved.
Journal ArticleDOI
Measurement of neutrino oscillation with KamLAND: evidence of spectral distortion.
T. Araki,K. Eguchi,Sanshiro Enomoto,K. Furuno,Koichi Ichimura,H. Ikeda,Kunio Inoue,K. Ishihara,K. Ishihara,T. Iwamoto,T. Iwamoto,T. Kawashima,Yasuhiro Kishimoto,M. Koga,Y. Koseki,T. Maeda,T. Mitsui,M. Motoki,K. Nakajima,Hiroshi Ogawa,K. Owada,J. S. Ricol,I. Shimizu,J. Shirai,F. Suekane,A. Suzuki,K. Tada,Osamu Tajima,K. Tamae,Y. Tsuda,Hiroko Watanabe,J. Busenitz,T. Classen,Z. Djurcic,G. Keefer,K. McKinny,Dongming Mei,Dongming Mei,A. Piepke,E. Yakushev,B. E. Berger,B. E. Berger,Y. D. Chan,Y. D. Chan,M. P. Decowski,M. P. Decowski,D. A. Dwyer,D. A. Dwyer,Stuart J. Freedman,Stuart J. Freedman,Y. Fu,Y. Fu,B. K. Fujikawa,B. K. Fujikawa,J. Goldman,J. Goldman,Frederick Gray,Frederick Gray,K. M. Heeger,K. M. Heeger,K. T. Lesko,K. T. Lesko,Kam Biu Luk,Kam Biu Luk,Hitoshi Murayama,Hitoshi Murayama,A. W. P. Poon,A. W. P. Poon,H. M. Steiner,H. M. Steiner,Lindley Winslow,Lindley Winslow,G. A. Horton-Smith,G. A. Horton-Smith,C. Mauger,R. D. McKeown,Petr Vogel,C. E. Lane,T. Miletic,Peter Gorham,G. Guillian,John G. Learned,J. Maricic,S. Matsuno,Sandip Pakvasa,S. Dazeley,S. Hatakeyama,A. Rojas,Robert Svoboda,B. D. Dieterle,J. A. Detwiler,Giorgio Gratta,K. Ishii,N. Tolich,Y. Uchida,Y. Uchida,M. Batygov,W. M. Bugg,Yuri Efremenko,Y. Kamyshkov,A. Kozlov,Y. Nakamura,C. R. Gould,C. R. Gould,Hugon J Karwowski,Hugon J Karwowski,D. M. Markoff,D. M. Markoff,J. A. Messimore,J. A. Messimore,Koji Nakamura,Koji Nakamura,Ryan Rohm,Ryan Rohm,Werner Tornow,Werner Tornow,R. Wendell,R. Wendell,Albert Young,Albert Young,M. J. Chen,Y. F. Wang,F. Piquemal +122 more
TL;DR: In this article, a study of neutrino oscillation based on a 766 ton/year exposure of KamLAND to reactor antineutrinos is presented, where the observed energy spectrum disagrees with the expected spectral shape.
Journal ArticleDOI
Limit on neutrinoless ββ decay of Xe136 from the first phase of KamLAND-Zen and comparison with the positive claim in Ge76
A. Gando,Y. Gando,H. Hanakago,H. Ikeda,Kunio Inoue,Kunio Inoue,Koji Ishidoshiro,R. Kato,M. Koga,M. Koga,S. Matsuda,T. Mitsui,D. Motoki,T. Nakada,K. Nakamura,K. Nakamura,A. Obata,A. Oki,Y. Ono,M. Otani,I. Shimizu,J. Shirai,A. Suzuki,Y. Takemoto,K. Tamae,K. Ueshima,Hideki Watanabe,B. D. Xu,Sumio Yamada,Hidetomo Yoshida,A. Kozlov,S. Yoshida,T. I. Banks,T. I. Banks,Stuart J. Freedman,Stuart J. Freedman,Stuart J. Freedman,B. K. Fujikawa,B. K. Fujikawa,B. K. Fujikawa,Ke Han,Ke Han,T. O'Donnell,T. O'Donnell,B. E. Berger,Yu. Efremenko,Yu. Efremenko,Hugon J Karwowski,D. M. Markoff,Werner Tornow,J. A. Detwiler,Sanshiro Enomoto,Sanshiro Enomoto,M. P. Decowski,M. P. Decowski +54 more
TL;DR: The combined results from KamLAND-Zen and EXO-200 give T(1/2)(0ν)>3.4×10(25) yr at 90% C.L., which corresponds to a Majorana neutrino mass limit of <(120-250) meV based on a representative range of available matrix element calculations.
Journal ArticleDOI
Experimental investigation of geologically produced antineutrinos with KamLAND
T. Araki,Sanshiro Enomoto,K. Furuno,Y. Gando,Koichi Ichimura,H. Ikeda,Kunio Inoue,Yasuhiro Kishimoto,M. Koga,Y. Koseki,T. Maeda,T. Mitsui,M. Motoki,K. Nakajima,Hiroshi Ogawa,M. Ogawa,K. Owada,J. S. Ricol,I. Shimizu,J. Shirai,F. Suekane,A. Suzuki,K. Tada,Sakae Takeuchi,K. Tamae,Y. Tsuda,Hideki Watanabe,J. Busenitz,T. Classen,Z. Djurcic,G. Keefer,David Leonard,A. Piepke,E. Yakushev,B. E. Berger,Y. D. Chan,M. P. Decowski,D. A. Dwyer,Stuart J. Freedman,B. K. Fujikawa,J. Goldman,Frederick Gray,K. M. Heeger,L. Hsu,K. T. Lesko,K. B. Luk,Hitoshi Murayama,T. O'Donnell,A. W. P. Poon,H. M. Steiner,Lindley Winslow,C. Mauger,R. D. McKeown,Petr Vogel,C. E. Lane,T. Miletic,G. Guillian,John G. Learned,J. Maricic,S. Matsuno,Sandip Pakvasa,G. A. Horton-Smith,S. Dazeley,S. Hatakeyama,A. Rojas,R. Svoboda,B. D. Dieterle,J. A. Detwiler,Giorgio Gratta,K. Ishii,N. Tolich,Y. Uchida,M. Batygov,W. M. Bugg,Yuri Efremenko,Yuri Kamyshkov,A. Kozlov,Y. Nakamura,Hugon J Karwowski,Hugon J Karwowski,Hugon J Karwowski,D. M. Markoff,D. M. Markoff,D. M. Markoff,Koji Nakamura,Koji Nakamura,Koji Nakamura,Ryan Rohm,Ryan Rohm,Ryan Rohm,Werner Tornow,Werner Tornow,Werner Tornow,R. A. Wendell,R. A. Wendell,R. A. Wendell,M. J. Chen,Y. F. Wang,F. Piquemal +98 more
TL;DR: Although the present data have limited statistical power, they nevertheless provide by direct means an upper limit for the radiogenic power of U and Th in the Earth, a quantity that is currently poorly constrained.