Hiroaki Watanabe

J-GLOBAL         Last updated: Oct 14, 2019 at 10:07
 
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Name
Hiroaki Watanabe

Research Areas

 
 

Academic & Professional Experience

 
2012
 - 
Today
Associate professor, nstitute of Particle and Nuclear Studies, High Energy Accelerator Research Orgnization,KEK
 

Published Papers

 
The KOTO Collaboration, J. K. Ahn, B. Beckford, J. Beechert, K. Bryant, M. Campbell, S. H. Chen, J. Comfort, K. Dona, N. Hara, H. Haraguchi, Y. B. Hsiung, M. Hutcheson, T. Inagaki, I. Kamiji, N. Kawasaki, E. J. Kim, J. L. Kim, Y. J. Kim, J. W. Ko, T. K. Komatsubara, K. Kotera, A. S. Kurilin, J. W. Lee, G. Y. Lim, C. Lin, Q. Lin, Y. Luo, J. Ma, Y. Maeda, T. Mari, T. Masuda, T. Matsumura, D. Mcfarland, N. McNeal, J. Micallef, K. Miyazaki, R. Murayama, D. Naito, K. Nakagiri, H. Nanjo, H. Nishimiya, T. Nomura, M. Ohsugi, H. Okuno, M. Sasaki, N. Sasao, K. Sato, T. Sato, Y. Sato, H. Schamis, S. Seki, N. Shimizu, T. Shimogawa, T. Shinkawa, S. Shinohara, K. Shiomi, S. Su, Y. Sugiyama, S. Suzuki, Y. Tajima, M. Taylor, M. Tecchio, M. Togawa, Y. C. Tung, Y. W. Wah, H. Watanabe, J. K. Woo, T. Yamanaka, H. Y. Yoshida
Phys. Rev. Lett.   122 021802   Jan 2019   [Refereed]
A search for the rare decay Tex was
performed. With the data collected in 2015, corresponding to Tex protons on target, a single event sensitivity of $( 1.30 \pm 0.01_{\rm
stat.} \pm 0.14_{\rm sy...
Muto Ryotaro, Agari Keizo, Aoki Kazuya, Bessho Kotaro, Hagiwara Masayuki, Hirose Erina, Ieiri Masaharu, Iwasaki Ruri, Katoh Yohji, Kitagawa Jun-ichi, Minakawa Michifumi, Morino Yuhei, Saito Kiwamu, Sato Yoshinori, Sawada Shin'ya, Shirakabe Yoshihisa, Suzuki Yoshihiro, Takahashi Hitoshi, Tanaka Kazuhiro, Toyoda Akihisa, Watanabe Hiroaki, Yamanoi Yutaka
ICRS-13 & RPSD-2016, 13TH INTERNATIONAL CONFERENCE ON RADIATION SHIELDING & 19TH TOPICAL MEETING OF THE RADIATION PROTECTION AND SHIELDING DIVISION OF THE AMERICAN NUCLEAR SOCIETY - 2016   153    2017   [Refereed]
J. K. Ahn, K. Y. Baek, S. Banno, B. Beckford, B. Brubaker, T. Cai, M. Campbell, C. Carruth, S. H. Chen, S. Chu, J. Comfort, Y. T. Duh, T. Furukawa, H. Haraguchi, T. Hineno, Y. B. Hsiung, M. Hutcheson, T. Inagaki, M. Isoe, E. Iwai, T. Kamibayashi, I. Kamiji, N. Kawasaki, E. J. Kim, Y. J. Kim, J. W. Ko, T. K. Komatsubara, A. S. Kurilin, G. H. Lee, H. S. Lee, J. W. Lee, S. K. Lee, G. Y. Lim, C. Lin, J. Ma, Y. Maeda, T. Masuda, T. Matsumura, D. Mcfarland, J. Micallef, K. Miyazaki, K. Morgan, R. Murayama, D. Naito, K. Nakagiri, Y. Nakajima, Y. Nakaya, H. Nanjo, T. Nomura, T. Nomura, Y. Odani, R. Ogata, H. Okuno, T. Ota, Y. D. Ri, M. Sasaki, N. Sasao, K. Sato, T. Sato, S. Seki, T. Shimogawa, T. Shinkawa, S. Shinohara, K. Shiomi, J. S. Son, J. Stevens, S. Su, Y. Sugiyama, S. Suzuki, Y. Tajima, G. Takahashi, Y. Takashima, M. Tecchio, I. Teo, M. Togawa, T. Toyoda, Y. C. Tung, T. Usuki, Y. W. Wah, H. Watanabe, N. Whallon, J. K. Woo, J. Xu, M. Yamaga, S. Yamamoto, T. Yamanaka, H. Yamauchi, Y. Yanagida, H. Yokota, H. Y. Yoshida, H. Yoshimoto
Prog. Theor. Exp. Phys. (2017) 021C01      Sep 2016   [Refereed]
We searched for the Tex-violating rare decay of neutral kaon, Tex, in data from the first 100 hours of physics running
in 2013 of the J-PARC KOTO experiment. One candidate event was observed while
Tex ba...
T. Masuda, J. K. Ahn, S. Banno, M. Campbell, J. Comfort, Y. T. Duh, T. Hineno, Y. B. Hsiung, T. Inagaki, E. Iwai, N. Kawasaki, E. J. Kim, Y. J. Kim, J. W. Ko, T. K. Komatsubara, A. S. Kurilin, G. H. Lee, J. W. Lee, S. K. Lee, G. Y. Lim, J. Ma, D. MacFarland, Y. Maeda, T. Matsumura, R. Murayama, D. Naito, Y. Nakaya, H. Nanjo, T. Nomura, Y. Odani, H. Okuno, Y. D. Ri, N. Sasao, K. Sato, T. Sato, S. Seki, T. Shimogawa, T. Shinkawa, K. Shiomi, J. S. Son, Y. Sugiyama, S. Suzuki, Y. Tajima, G. Takahashi, Y. Takashima, M. Tecchio, M. Togawa, T. Toyoda, Y. C. Tung, Y. W. Wah, H. Watanabe, J. K. Woo, J. Xu, T. Yamanaka, Y. Yanagida, H. Y. Yoshida, H. Yoshimoto
Prog. Theor. Exp. Phys. 2016, 013C03      Sep 2015
The KOTO (Tex at Tokai) experiment aims to observe the CP-violating rare
decay Tex by using a long-lived neutral-kaon
beam produced by the 30 GeV proton beam at the Japan Proton Accelerator
Research Complex. The...
H.Takahashi, H. Watanabe et al.
Journal of Radioanalytical and Nuclear Chemistry   305(3) 803-809   2015   [Refereed]
T. Matsumura, T. Shinkawa, H. Yokota, E. Iwai, T. K. Komatsubara, J. W. Lee, G. Y. Lim, J. Ma, T. Masuda, H. Nanjo, T. Nomura, Y. Odani, Y. D. Ri, K. Shiomi, Y. Sugiyama, S. Suzuki, M. Togawa, Y. Wah, H. Watanabe, T. Yamanaka
Nucl. Inst. and Meth. A 795 (2015) 19-31      Sep 2014
The Outer-Edge Veto (OEV) counter subsystem for extra-photon detection from
the backgrounds for the? Tex decay is located
at the outer edge of the endcap CsI calorimeter of the KOTO experiment at
J-PARC. The subsyst...
K. Shiomi et al.
Nucl. Instrum. Methods Phys. Res. A   664 264-271   2012   [Refereed]
H. Takahashi, H. Watanabe et al.
Prog. Theor. Exp. Phys.(PTEP)   02B009    2012   [Refereed]
Agari Keizo, Hirose Erina, Ieiri Masaharu, Iio Masami, Katoh Yoji, Kiyomichi Akio, Minakawa Michifumi, Muto Ryotaro, Naruki Megumi, Noumi Hiroyuki, Sato Yoshinori, Sawada Shin'ya, Shirakabe Yoshihisa, Suzuki Yoshihiro, Takahashi Hitoshi, Takasaki Minoru, Tanaka Kazuhiro H., Toyoda Akihisa, Watanabe Hiroaki, Yamanoi Yutaka
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   (1)    2012   [Refereed]
E391a Collaboration, R. Ogata, S. Suzuki, J. K. Ahn, Y. Akune, V. Baranov, K. F. Chen, J. Comfort, 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, S. Y. Lee, G. Y. Lim, J. Ma, T. Matsumura, A. Moisseenko, H. Morii, T. Morimoto, Y. Nakajima, T. Nakano, H. Nanjo, N. Nishi, J. Nix, T. Nomura, M. Nomachi, H. Okuno, K. Omata, G. N. Perdue, S. Perov, S. Podolsky, S. Porokhovoy, K. Sakashita, T. Sasaki, N. Sasao, H. Sato, T. Sato, M. Sekimoto, T. Shimogawa, T. Shinkawa, Y. Stepanenko, Y. Sugaya, A. Sugiyama, T. Sumida, Y. Tajima, S. Takita, Z. Tsamalaidze, T. Tsukamoto, Y. C. Tung, Y. W. Wah, H. Watanabe, M. L. Wu, M. Yamaga, T. Yamanaka, H. Y. Yoshida, Y. Yoshimura, Y. Zheng
   Jun 2011   [Refereed]
The rare decay K0(L) --> pi0 pi0 nu nu-bar was studied with the E391a
detector at the KEK 12-GeV proton synchrotron. Based on 9.4 x 10^9 K0L decays,
an upper limit of 8.1 x 10^{-7} was obtained for the branching fraction at 90%
confidence level. W...
Y. C. Tung, Y. B. Hsiung, M. L. Wu, K. F. Chen, J. K. Ahn, Y. Akune, V. Baranov, J. Comfort, M. Doroshenko, Y. Fujioka, T. Inagaki, S. Ishibashi, N. Ishihara, H. Ishii, E. Iwai, T. Iwata, I. Kato, S. Kobayashi, T. K. Komatsubara, A. S. Kurilin, E. Kuzmin, A. Lednev, H. S. Lee, S. Y. Lee, G. Y. Lim, J. Ma, T. Matsumura, A. Moisseenko, H. Morii, T. Morimoto, T. Nakano, H. Nanjo, J. Nix, T. Nomura, M. Nomachi, R. Ogata, H. Okuno, K. Omata, G. N. Perdue, S. Podolsky, K. Sakashita, T. Sasaki, N. Sasao, H. Sato, T. Sato, M. Sekimoto, T. Shinkawa, Y. Sugaya, A. Sugiyama, T. Sumida, S. Suzuki, Y. Tajima, S. Takita, Z. Tsamalaidze, T. Tsukamoto, Y. Wah, H. Watanabe, M. Yamaga, T. Yamanaka, H. Y. Yoshida, Y. Yoshimura, Y. Zheng
Phys.Rev.Lett.102:051802,2009      Oct 2008   [Refereed]
We performed a search for a light pseudoscalar particle Tex in the decay
Tex, Tex with the E391a detector at KEK. Such a
particle with a mass of 214.3 MeV/Tex was suggested by the HyperCP
experiment. We found no eviden...
H. Watanabe(*corresoponding author) et al.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   552(3) 263-275   2005   [Refereed]
Hiroaki Watanabe(*corresponding author) et al.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   484(3) 118-128   2002   [Refereed]
Hiroaki Watanabe(*corresponding author) et al.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment   545(3) 542-553   May 2005   [Refereed]

Conference Activities & Talks

 
Development of a partition wall to prevent scattering of beam-window fragments at J-PARC Hadron Facility
Hiroaki Watanabe
The 16th Annual Meeting of Particle Accelerator Society of Japan   31 Jul 2019   
Development of New Production Target at J-PARC Hadron Experimental Facility
Hiroaki Watanabe
14th International Workshop on Spallation Materials Technology   12 Nov 2018   
Design of Beam Window made of Beryllium at J-PARC Hadron Facility
Hiroaki Watanabe
PASJ 2018   Aug 2018   
Development of a radiation-resistant rotation sensor for a new production target at J-PARC Hadron Facility
Hiroaki Watanabe
PASJ 2017   Aug 2017   
Construction of the helium-gas circulation system for monitoring target soundness at J-PARC Hadron Facility
Hiroaki Watanabe
PASJ 2016   Aug 2016   
Status of the beam windows at J-PARC Hadron beamline [Invited]
Hiroaki Watanabe
SiC workshop   Sep 2015   
New Tex Experiment(KOTO) at J-PARC
Hiroaki Watanabe
International Conference on High Energy Physics(ICHEP)   Jul 2010   
Construction of a neutral KL beamline for the J-PARC KOTO expeimernt
Hiroaki Watanabe
PASJ 2009   Aug 2009