J
J. K. Ahn
Researcher at Pusan National University
Publications - 96
Citations - 4354
J. K. Ahn is an academic researcher from Pusan National University. The author has contributed to research in topics: Meson & Baryon. The author has an hindex of 24, co-authored 48 publications receiving 4089 citations.
Papers
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Journal ArticleDOI
Observation of reactor electron antineutrinos disappearance in the RENO experiment.
J. K. Ahn,S. Chebotaryov,J. H. Choi,Seonho Choi,Wonshik Choi,Y. Choi,H. I. Jang,J. S. Jang,Eunju Jeon,I. S. Jeong,K. K. Joo,B. R. Kim,B. C. Kim,Hyun-Chul Kim,J. Y. Kim,S. B. Kim,S. H. Kim,S. Y. Kim,W. Kim,Yongsun Kim,J. S. H. Lee,Jaekwang Lee,I. T. Lim,K. J. Ma,M. Y. Pac,I. G. Park,Jong-Min Park,Kangsoon Park,J. W. Shin,K. Siyeon,B. S. Yang,I. S. Yeo,S. H. Yi,Intae Yu +33 more
TL;DR: The RENO experiment has observed the disappearance of reactor electron antineutrinos, consistent with neutrino oscillations, with a significance of 4.9 standard deviations.
Journal ArticleDOI
Evidence for a narrow S = +1 baryon resonance in photoproduction from the neutron.
T. Nakano,D. S. Ahn,J. K. Ahn,Hidetoshi Akimune,Y. Asano,W. C. Chang,S. Daté,Hiroyasu Ejiri,H. Fujimura,M. Fujiwara,M. Fujiwara,K. Hicks,Tomoaki Hotta,K. Imai,Takuji Ishikawa,Takahiro Iwata,H. Kawai,Z. Y. Kim,K. Kino,H. Kohri,N. Kumagai,S. Makino,T. Matsumura,T. Matsumura,N. Matsuoka,Tsutomu Mibe,Tsutomu Mibe,K. Miwa,M. Miyabe,Y. Miyachi,Y. Miyachi,M. Morita,N. Muramatsu,M. Niiyama,Masaharu Nomachi,Y. Ohashi,T. Ooba,Haruo Ohkuma,D. S. Oshuev,Chary Rangacharyulu,Atsushi Sakaguchi,T. Sasaki,P. M. Shagin,P. M. Shagin,Y. Shiino,Hajime Shimizu,Yorihito Sugaya,M. Sumihama,M. Sumihama,Hiroyuki Toyokawa,A. Wakai,C. W. Wang,S. C. Wang,K. Yonehara,K. Yonehara,Tetsuhiko Yorita,Masato Yoshimura,M. Yosoi,R. G.T. Zegers +58 more
TL;DR: The gamman-->K(+)K(-)n reaction on 12C has been studied by measuring both K+ and K- at forward angles and a sharp baryon resonance peak was observed, consistent with an antidecuplet of baryons predicted by the chiral soliton model.
Journal ArticleDOI
The γ→p→K+Λ and γ→p→K+Σ0 reactions at forward angles with photon energies from 1.5 to 2.4 GeV
M. Sumihama,J. K. Ahn,Hidetoshi Akimune,Y. Asano,C. Bennhold,W. C. Chang,T. Corthals,S. Daté,H. Ejiri,H. Fujimura,M. Fujiwara,M. Fujiwara,M. Guidal,K. Hicks,Tomoaki Hotta,K. Imai,T. Ishikawa,T. Iwata,H. Kawai,Z. Y. Kim,K. Kino,H. Kohri,N. Kumagai,S. Makino,Terry Mart,T. Matsumura,N. Matsuoka,Tsutomu Mibe,M. Miyabe,Y. Miyachi,Masato Morita,Norihito Muramatsu,T. Nakano,M. Niiyama,Masaharu Nomachi,Yuji Ohashi,T. Ooba,Haruo Ohkuma,D. S. Oshuev,Chary Rangacharyulu,Atsushi Sakaguchi,Takuya Sasaki,P. M. Shagin,Y. Shiino,Hajime Shimizu,Yorihito Sugaya,Hiroyuki Toyokawa,A. Wakai,C. W. Wang,S. C. Wang,K. Yonehara,Tetsuhiko Yorita,M. Yosoi,R. G. T. Zegers +53 more
TL;DR: Differential cross sections and photon-beam asymmetries for the {gamma}-vectorp{yields}K{sup +}{lambda} and δ-gamma-vector p{y yieldss} K{sup+sigma}{sup 0} reactions have been measured in the photon energy range from 1.5 to 2.4 GeV and in the angular range from {theta}{sub c.m}=0 deg. to 60 deg.
Journal ArticleDOI
Experimental study of the decay KL0→π0νν̄
J. K. Ahn,Y. Akune,V. A. Baranov,K. F. Chen,J. R. Comfort,M. Doroshenko,M. Doroshenko,Y. Fujioka,Y. B. Hsiung,T. Inagaki,S. Ishibashi,N. Ishihara,H. Ishii,E. Iwai,T. Iwata,I. Kato,S. Kobayashi,S. Komatsu,T. K. Komatsubara,A. S. Kurilin,E. Kuzmin,A. Lednev,H. S. Lee,Soo Young Lee,G. Y. Lim,J. Ma,T. Matsumura,A. Moisseenko,H. Morii,T. Morimoto,Y. Nakajima,T. Nakano,Hajime Nanjo,N. Nishi,J. Nix,Takashi Nomura,Masaharu Nomachi,Ryusei Ogata,H. Okuno,K. Omata,G. N. Perdue,G. N. Perdue,S. Perov,S. Podolsky,S. Porokhovoy,K. Sakashita,T. Sasaki,N. Sasao,H. Sato,Toru Sato,M. Sekimoto,Tetsushi Shimogawa,T. Shinkawa,Yu. Yu. Stepanenko,Yorihito Sugaya,Akira Sugiyama,Toshi Sumida,Toshi Sumida,S. Suzuki,Yasuhisa Tajima,S. Takita,Z. Tsamalaidze,T. Tsukamoto,Y. C. Tung,Y. W. Wah,Haruki Watanabe,M. L. Wu,M. Yamaga,T. Yamanaka,Hiroshi Yoshida,Y. Yoshimura,Y. Zheng +71 more
TL;DR: The first dedicated search for the rare neutral-kaon decay was carried out in the E391a experiment at the KEK 12-GeV proton synchrotron as mentioned in this paper.
Journal ArticleDOI
φ photo-production from Li, C, Al, and Cu nuclei at E γ=1.5-2.4 GeV
Takatsugu Ishikawa,D. S. Ahn,D. S. Ahn,J. K. Ahn,Hidetoshi Akimune,W. C. Chang,S. Daté,H. Fujimura,H. Fujimura,M. Fujiwara,M. Fujiwara,K. Hicks,Tomoaki Hotta,K. Imai,H. Kawai,K. Kino,H. Kohri,T. Matsumura,T. Matsumura,T. Matsumura,Tsutomu Mibe,Tsutomu Mibe,Tsutomu Mibe,K. Miwa,M. Miyabe,Mizuki Morita,T. Murakami,N. Muramatsu,Hironobu Nakamura,Masanobu Nakamura,Masanobu Nakamura,T. Nakano,M. Niiyama,Masaharu Nomachi,Y. Ohashi,T. Ooba,D. S. Oshuev,Chary Rangacharyulu,Atsushi Sakaguchi,Y. Shiino,Yasuhiro Sakemi,Hajime Shimizu,Yorihito Sugaya,M. Sumihama,M. Sumihama,Y. Toi,Hiroyuki Toyokawa,C. Wang,Tetsuhiko Yorita,M. Yosoi,R. G. T. Zegers,R. G. T. Zegers +51 more
TL;DR: The photo-production of mesons from Li, C, Al, and Cu at forward angles has been measured at E γ = 1.5 − 2.4 GeV, and the number of events for incoherent mesons was found to have a target mass number dependence of A 0.72 ± 0.07 in the kinematical region of | t | ⩽ 0.6 GeV 2 / c 2 as mentioned in this paper.