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Your search keyword '"Tokiyasu, A."' showing total 157 results
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157 results on '"Tokiyasu, A."'

1. Performance evaluation of electron multiplier tubes as a high-intensity muon beam monitor of accelerator neutrino experiments

Author

Honjo, Takashi, Ashida, Yosuke, Auersperg-Castell, Oderich F., Friend, Megan, Heitkamp, Ian, Ichikawa, Atsuko K., Ishitsuka, Masaki, Izumi, Nao, Kasama, Sohei, Kashiwagi, Shigeru, Kawamura, Yuma, Kikawa, Tatsuya, Kobata, Takuya, Matsubara, Tsunayuki, Miyabe, Manabu, Nakamura, Kiseki D., Nakamura, Hina, Sato, Yukine, Sakashita, Ken, Seiya, Yoshihiro, Takifuji, Kouchi, Tokiyasu, Atsushi, Yamamoto, Tatsuya, Yamamoto, Kazuhiro, and Yasutome, Kenji

Subjects
Physics - Instrumentation and Detectors
Abstract

Upgrade work towards increasing the beam intensity of the neutrino beamline at J- PARC is underway. Monitoring tertiary muon beams is essential for stable operation of the beamline. Accordingly, we plan to replace the present muon monitor sensors with electron multiplier tubes (EMTs). We investigated the radiation tolerance and linearity response of EMTs using a 90 MeV electron beam. An EMTs was irradiated with electrons up to 470 nC. EMTs show higher radiation tolerance than the Si sensors which are presently used as one of the muon monitor detectors for the T2K long-baseline neutrino experiment at J-PARC. The integrated charge yield decrease is found to be less than 8% after a beam irradiation equivalent to 132 days of operation at the future J-PARC beam power of 1.3 MW. The EMTs show linearity better than $\pm$5% up to the future beam intensity. The observed yield decrease is likely due to dynode deterioration based on the detailed investigation. The studies described here confirm that EMTs can be used as a high-intensity muon beam monitor. From the reported results, we are proceeding with the installation in the J-PARC neutrino beamline., Comment: 20 pages,19 figures

Published
2024

2. Pole position of $\Lambda(1405)$ measured in $d(K^-,n)\pi\Sigma$ reactions

Author

Collaboration, J-PARC E31, Aikawa, S., Ajimura, S., Akaishi, T., Asano, H., Beer, G., Berucci, C., Bragadireanu, M., Buehler, P., Busso, L., Cargnelli, M., Choi, S., Curceanu, C., Enomoto, S., Fujioka, H., Fujiwara, Y., Fukuda, T., Guaraldo, C., Hashimoto, T., Hayano, R. S., Hiraiwa, T., Iio, M., Iliescu, M., Inoue, K., Ishiguro, Y., Ishimoto, S., Ishikawa, T., Itahashi, K., Iwai, M., Iwasaki, M., Kanno, K., Kato, K., Kato, Y., Kawasaki, S., Kienle, P., Komatsu, Y., Kou, H., Ma, Y., Marton, J., Matsuda, Y., Mizoi, Y., Morra, O., Murayama, R., Nagae, T., Noumi, H., Ohnishi, H., Okada, S., Omar, Z., Outa, H., Piscicchia, K., Sada, Y., Sakaguchi, A., Sakuma, F., Sato, M., Scordo, A., Sekimoto, M., Shi, H., Shirotori, K., Sirghi, D., Sirghi, F., Suzuki, K., Suzuki, S., Suzuki, T., Tanida, K., Tatsuno, H., Tokiyasu, A. O., Tokuda, M., Tomono, D., Toyoda, A., Tsukada, K., Vazquez-Doce, O., Widmann, E., Yamaga, T., Yamazaki, T., Yim, H., Zhang, Q., and Zmeskal, J.

Subjects
Nuclear Experiment
Abstract

We measured a set of $\pi^\pm\Sigma^\mp$, $\pi^0\Sigma^0$, and $\pi^-\Sigma^0$ invariant mass spectra below and above the $\bar{K}N$ mass threshold in $K^-$-induced reactions on deuteron. We deduced the $S$-wave $\bar{K}N\rightarrow\pi\Sigma$ and $\bar{K}N\rightarrow\bar{K}N$ scattering amplitudes in the isospin 0 channel in the framework of a $\bar{K}N$ and $\pi\Sigma$ coupled channel. We find that a resonance pole corresponding to $\Lambda(1405)$ is located at 1417.7$^{+6.0}_{-7.4}$(fitting errors)$^{+1.1}_{-1.0}$(systematic errors) + $[-26.1^{+6.0}_{-7.9}$(fitting errors)$^{+1.7}_{-2.0}$(systematic errors)]$i$ MeV/$c^2$, closer to the $\bar{K}N$ mass threshold than the value determined by the Particle Data Group., Comment: 8 pages, 5 figures

Published
2022
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3. The International Linear Collider: Report to Snowmass 2021

Author

Aryshev, Alexander, Behnke, Ties, Berggren, Mikael, Brau, James, Craig, Nathaniel, Freitas, Ayres, Gaede, Frank, Gessner, Spencer, Gori, Stefania, Grojean, Christophe, Heinemeyer, Sven, Jeans, Daniel, Kruger, Katja, List, Benno, List, Jenny, Liu, Zhen, Michizono, Shinichiro, Miller, David W., Moult, Ian, Murayama, Hitoshi, Nakada, Tatsuya, Nanni, Emilio, Nojiri, Mihoko, Padamsee, Hasan, Perelstein, Maxim, Peskin, Michael E., Poeschl, Roman, Posen, Sam, Robson, Aidan, Strube, Jan, Suehara, Taikan, Tian, Junping, Titov, Maxim, Vos, Marcel, White, Andrew, Wilson, Graham, Yokoya, Kaoru, Zarnecki, Aleksander Filip, Adachi, Ichiro, Agashe, Kaustubh, Jovin, Tatjana Agatonovic, Aihara, Hiroaki, Altmannshofer, Wolfgang, Alves, Daniele, Anguiano, Justin, Aoki, Ken-Ichi, Aoki, Masato, Aoki, Toshihiro, Aoki, Yumi, Arai, Yasuo, Araki, Hayato, Asada, Haruka, Asai, Kento, Asai, Shoji, Attie, David, Baer, Howard, Bagger, Jonathan, Bai, Yang, Bailey, Ian, Barrue, Ricardo, Bartoldus, Rainer, Barzi, Emanuela, Basso, Matthew, Bauerdick, Lothar, Baum, Sebastian, Bellerive, Alain, Belomestnykh, Sergey, Antequera, Jorge Berenguer, Beyer, Jakob, Bhat, Pushpalatha, Bilki, Burak, Black, Kevin, Bloom, Kenneth, Bodwin, Geoffrey, Boisvert, Veronique, Boran, Fatma, Boudry, Vincent, Boughezal, Radja, Boveia, Antonio, Bozovic-Jelisavcic, Ivanka, Brient, Jean-Claude, Brodsky, Stanley, Brunetti, Laurent, Buesser, Karsten, Bulyak, Eugene, Burrows, Philip N., Burt, Graeme C., Cai, Yunhai, Cairo, Valentina, Canepa, Anadi, Celiberto, Francesco Giovanni, Cenni, Enrico, Chacko, Zackaria, Chaikovska, Iryna, Checchin, Mattia, Chen, Lisong, Chen, Thomas Y., Cheng, Hsin Chia, Cho, Gi-Chol, Choudhary, Brajesh, Clarke, Jim, Cline, James, Co, Raymond, Cohen, Timothy, Colas, Paul, Damerell, Chris, Das, Arindam, Dasu, Sridhara, Dawson, Sally, de Blas, Jorge, de Lima, Carlos Henrique, Deandrea, Aldo, Dehmelt, Klaus, Delayen, Jean, Demarteau, Marcel, Denisov, Dmitri, Dermisek, Radovan, Dieguez, Angel, Dohmae, Takeshi, Dopke, Jens, Dort, Katharina, Du, Yong, Dudar, Bohdan, Dutta, Bhaskar, Dutta, Juhi, Einhaus, Ulrich, Elsen, Eckhard, Endo, Motoi, Eremeev, Grigory, Eren, Engin, Erler, Jens, Esarey, Eric, Everett, Lisa, Golfe, Angeles Faus, Garcia, Marcos Fernandez, Foster, Brian, Fourches, Nicolas, Fouz, Mary-Cruz, Fujii, Keisuke, Fujimoto, Junpei, Torregrosa, Esteban Fullan, Furukawa, Kazuro, Fusayasu, Takahiro, Fuster, Juan, Ganjour, Serguei, Gao, Yuanning, Gaur, Naveen, Geng, Rongli, Georgi, Howard, Gherghetta, Tony, Goldstein, Joel, Goncalves, Dorival, Gonski, Julia, Gonzalo, Tomas, Goto, Takeyoshi, Goto, Toru, Graf, Norman, Grames, Joseph, Grannis, Paul, Gray, Lindsey, Grohsjean, Alexander, Gu, Jiayin, Guler, Yalcin, Gutierrez, Phillip, Haba, Junji, Haber, Howard, Hallford, John, Hamaguchi, Koichi, Han, Tao, Hara, Kazuhiko, Harada, Daisuke, Hashimoto, Koji, Hashino, Katsuya, Hayashi, Masahito, Heinrich, Gudrun, Hidaka, Keisho, Higuchi, Takeo, Hinode, Fujio, Hioki, Zenro, Hirose, Minoru, Hiroshima, Nagisa, Hisano, Junji, Hollik, Wolfgang, Homiller, Samuel, Hong, Sungwoo, Hook, Anson, Horii, Yasuyuki, Hoshina, Hiroki, Hristova, Ivana, Huitu, Katri, Hyakutake, Yoshifumi, Iijima, Toru, Ikematsu, Katsumasa, Ilderton, Anton, Inami, Kenji, Irles, Adrian, Ishikawa, Akimasa, Ishiwata, Koji, Ito, Hayato, Ivanov, Igor, Iwamoto, Sho, Iwamoto, Toshiyuki, Iwasaki, Masako, Iwashita, Yoshihisa, Jia, Haoyi, Morales, Fabricio Jimenez, Joshi, Prakash, Jung, Sunghoon, Kacarevic, Goran, Kagan, Michael, Kakizaki, Mitsuru, Kalinowski, Jan, Kaminski, Jochen, Kanaya, Kazuyuki, Kanemura, Shinya, Kanno, Hayato, Kano, Yuya, Kashiwagi, Shigeru, Kato, Yukihiro, Kawada, Nanami, Kawada, Shin-ichi, Kawagoe, Kiyotomo, Khoze, Valery, Kichimi, Hiromichi, Kim, Doojin, Kitahara, Teppei, Kitano, Ryuichiro, Klamka, Jan, Komamiya, Sachio, Kong, K. C., Konomi, Taro, Kotera, Katsushige, Kou, Emi, Kravchenko, Ilya, Kubo, Kiyoshi, Kubo, Takayuki, Kumaoka, Takuya, Kumar, Ashish, Kumar, Nilanjana, Kunath, Jonas, Kundu, Saumyen, Kunitomo, Hiroshi, Kurata, Masakazu, Kuriki, Masao, Kusenko, Alexander, Lagouri, Theodota, Lankford, Andrew J., Lastovicka-Medin, Gordana, Diberder, Francois Le, Lee, Claire, Liepe, Matthias, Linacre, Jacob, Liptak, Zachary, Lomte, Shivani, Low, Ian, Ma, Yang, Maalouf, Hani, MacFarlane, David, Madison, Brendon, Madlener, Thomas, Maeda, Tomohito, Malek, Paul, Mandal, Sanjoy, Markiewicz, Thomas, Marshall, John, Martens, Aurelien, Martin, Victoria, Martinello, Martina, Rivero, Celso Martinez, Maru, Nobuhito, Matheson, John, Matsumoto, Shigeki, Matsunaga, Hiroyuki, Matsuo, Yutaka, Mawatari, Kentarou, Mbagwu, Johnpaul, McIntosh, Peter, McKeown, Peter, Meade, Patrick, Mekala, Krzysztof, Merkel, Petra, Mihara, Satoshi, Miralles, Víctor, Lopez, Marcos Miralles, Mishima, Go, Mishima, Satoshi, Mistlberger, Bernhard, Mitov, Alexander, Miyabayashi, Kenkichi, Miyamoto, Akiya, Mohanty, Gagan, Monaco, Laura, Mondragon, Myriam, Montgomery, Hugh E., Moortgat-Pick, Gudrid, Morange, Nicolas, Llacer, María Moreno, Moretti, Stefano, Mori, Toshinori, Morii, Toshiyuki, Moroi, Takeo, Morrissey, David, Nachman, Benjamin, Nagano, Kunihiro, Nakajima, Jurina, Nakamura, Eiji, Narita, Shinya, Nath, Pran, Nelson, Timothy, Newbold, David, Niki, Atsuya, Nishimura, Yasuhiro, Nishiyama, Eisaku, Nomura, Yasunori, Nowak, Kacper, Nozaki, Mitsuaki, de Vera, María Teresa Nunez Pardo, Ochoa, Ines, Ogata, Masahito, Ohashi, Satoru, Ohta, Hikaru, Ohta, Shigemi, Ohuchi, Norihito, Oide, Hideyuki, Okada, Nobuchika, Okada, Yasuhiro, Okawa, Shohei, Okayasu, Yuichi, Okugawa, Yuichi, Okugi, Toshiyuki, Okui, Takemichi, Okuyama, Yoshitaka, Omet, Mathieu, Omori, Tsunehiko, Ono, Hiroaki, Onoe, Tomoki, Ootani, Wataru, Otono, Hidetoshi, Ozawa, Shuhei, Griso, Simone Pagan, Papa, Alessandro, Paparella, Rocco, Park, Eun-Kyung, Perez, Gilad, Perez-Lorenzana, Abdel, Peters, Yvonne, Petriello, Frank, Piedra, Jonatan, Porod, Werner, Potter, Christopher, Price, Alan, Radkhorrami, Yasser, Reina, Laura, Reuter, Juergen, Richard, Francois, Riemann, Sabine, Rimmer, Robert, Rizzo, Thomas, Robens, Tania, Ruber, Roger, Jimeno, Alberto Ruiz, Saeki, Takayuki, Saha, Ipsita, Saito, Tomoyuki, Sakaguchi, Makoto, Sakai, Tadakatsu, Sakaki, Yasuhito, Sakurai, Kodai, Salvatico, Riccardo, Salvatore, Fabrizio, San, Yik Chuen, Sandick, Pearl, Sanuki, Tomoyuki, Sasikumar, Kollassery Swathi, Schaefer, Oliver, Schaefer, Ruth, Schneekloth, Uwe, Schoerner-Sadenius, Thomas, Schroeder, Carl, Schuster, Philip, Schwartzman, Ariel, Schwienhorst, Reinhard, Sefkow, Felix, Seiya, Yoshihiro, Sekiguchi, Motoo, Sekizawa, Kazuyuki, Senyo, Katsumi, Sert, Hale, Sertore, Danielev, Settles, Ronald, Shafi, Qaisar, Shahdara, Tetsuo, Haghi, Barmak Shams Es, Sharma, Ashish, Shelton, Jessie, Shepherd-Themistocleous, Claire, Shibuya, Hiroto, Shidara, Tetsuo, Shimomura, Takashi, Shindou, Tetsuo, Shoji, Yutaro, Shu, Jing, Sievers, Ian, Simon, Frank, Singh, Rajeev, Soreq, Yotam, Stanitzki, Marcel, Stapnes, Steinar, Steinhebel, Amanda, Stupak, John, Su, Shufang, Suekane, Fumihiko, Sugamoto, Akio, Sugawara, Yuji, Sugimoto, Satoru, Sugimoto, Yasuhiro, Sugiyama, Hiroaki, Sumino, Yukinari, Sundrum, Raman, Suzuki, Atsuto, Suzuki, Shin, Swiatlowski, Maximilian, Tait, Tim M. P., Takahashi, Shota, Takahashi, Tohru, Takeshita, Tohru, Takeuchi, Michihisa, Takubo, Yosuke, Tanabe, Tomohiko, Tanedo, Philip, Tanimoto, Morimitsu, Tao, Shuichiro, Tata, Xerxes, Tauchi, Toshiaki, Taylor, Geoffrey, Terada, Takahiro, Terunuma, Nobuhiro, Thaler, Jesse, Thea, Alessandro, Tillinger, Finn, Timmermans, Jan, Tobioka, Kohsaku, Toda, Kouichi, Tokiyasu, Atsushi, Toma, Takashi, Torndal, Julie, Tosun, Mehmet, Tsai, Yu-Dai, Tseng, Shih-Yen, Tsumura, Koji, Tuckler, Douglas, Uchida, Yoshiki, Uchiyama, Yusuke, Ueda, Daiki, Ukegawa, Fumihiko, Umemori, Kensei, Urakawa, Junji, Vallee, Claude, Vega, Roberto, Velasco, Liliana, Verdu-Andres, Silvia, Vernieri, Caterina, Vila, Anna, Alvarez, Ivan Vila, Vossebeld, Joost, Vsrms, Raghava, Vukasinovic, Natasa, Wackeroth, Doreen, Wakida, Moe, Wang, Liantao, Washio, Masakazu, Watanabe, Takashi, Watson, Nigel, Watts, Gordon, Weiglein, Georg, Wells, James D., Wenskat, Marc, Westhoff, Susanne, White, Glen, Williams, Ciaran, Willocq, Stephane, Wing, Matthew, Winter, Alasdair, Winter, Marc, Wu, Yongcheng, Xie, Keping, Xu, Tao, Yakovlev, Vyacheslav, Yamada, Shuei, Yamamoto, Akira, Yamamoto, Hitoshi, Yamamoto, Kei, Yamamoto, Yasuchika, Yamanaka, Masato, Yamashita, Satoru, Yamatani, Masahiro, Yamatsu, Naoki, Yasui, Shigehiro, Yoda, Takuya, Yonamine, Ryo, Yoshihara, Keisuke, Yoshioka, Masakazu, Yoshioka, Tamaki, Yuasa, Fukuko, Yumino, Keita, Zerwas, Dirk, Zheng, Ya-Juan, Zhou, Jia, Zhu, Hua Xing, Zobov, Mikhail, and Zomer, Fabian

Subjects
Physics - Accelerator Physics, High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our current understanding of particle physics. It is based on a proven accelerator technology. Its experiments will challenge the Standard Model of particle physics and will provide a new window to look beyond it. This document brings the story of the ILC up to date, emphasizing its strong physics motivation, its readiness for construction, and the opportunity it presents to the US and the global particle physics community., Comment: 356 pages, Large pdf file (40 MB) submitted to Snowmass 2021; v2 references to Snowmass contributions added, additional authors; v3 references added, some updates, additional authors

Published
2022

4. Differential cross sections and photon beam asymmetries of $\eta$ photoproduction on the proton at $E_\gamma$ = 1.3-2.4 GeV

Author

Hashimoto, T., Nam, T., Muramatsu, N., Ahn, J. K., Chang, W. C., Chen, J. Y., Chu, M. L., Date, S., Gogami, T., Goto, H., Hamano, H., He, Q. H., Hicks, K., Hiraiwa, T., Honda, Y., Hotta, T., Ikuno, H., Inoue, Y., Ishikawa, T., Jaegle, I., Jo, J. M., Kasamatsu, Y., Katsuragawa, H., Kido, S., Kon, Y., Matsumoto, S., Matsumura, Y., Miyabe, M., Mizutani, K., Nakamura, T., Nakano, T., Niiyama, M., Nozawa, Y., Ohashi, Y., Ohnishi, H., Ohta, T., Ozawa, K., Rangacharyulu, C., Ryu, S. Y., Sada, Y., Shibukawa, T., Shimizu, H., Shirai, R., Shiraishi, K., Strokovsky, E. A., Sugaya, Y., Sumihama, M., Suzuki, S., Tanaka, S., Taniguchi, Y., Tokiyasu, A., Tomida, N., Tsuchikawa, Y., Ueda, T., Yamazaki, H., Yamazaki, R., Yanai, Y., Yorita, T., Yoshida, C., and Yosoi, M.

Subjects
Nuclear Experiment
Abstract

We have carried out exclusive measurements for the photoproduction of an $\eta$ meson from a proton target with an egg-shaped calorimeter made of BGO crystals (BGOegg) and forward charged-particle detectors at the SPring-8 LEPS2 beamline. The differential cross sections and photon beam asymmetries of the $\gamma p \to \eta p$ reaction are measured in a center-of-mass energy ($W$) range of $1.82$-$2.32$ GeV and a polar angle range of $-1.0 < \cos{\theta^{\eta}_{\mathrm{c.m.}}} < 0.6$. The reaction is identified by selecting a proton and two $\gamma$'s produced by an $\eta$-meson decay. The kinematic fit method was employed to select the reaction candidate with the confidence level larger than $1$\%. A bump structure at $W$ = $2.0$-$2.3$ GeV in the differential cross section is confirmed at extremely backward $\eta$ polar angles, where the existing data are inconsistent with each other. This bump structure is likely associated with high-spin resonances that couple with $s\bar{s}$ quarks. The results of the photon beam asymmetries in a wide $\eta$ polar angle range are new for the photon beam energies exceeding $2.1$ GeV. These results are not reproduced by the existing partial wave analyses. They provide an additional constraint to nucleon resonance studies at high energies., Comment: 16 pages, 11 figures

Published
2022
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5. SPring-8 LEPS2 beamline: A facility to produce a multi-GeV photon beam via laser Compton scattering

Author

Muramatsu, N., Yosoi, M., Yorita, T., Ohashi, Y., Ahn, J. K., Ajimura, S., Asano, Y., Chang, W. C., Chen, J. Y., Date, S., Gogami, T., Hamano, H., Hashimoto, T., Hiraiwa, T., Hotta, T., Ishikawa, T., Kasamatsu, Y., Katsuragawa, H., Kobayakawa, R., Kohri, H., Masumoto, S., Matsumura, Y., Miyabe, M., Mizutani, K., Morino, Y., Nakano, T., Nam, T., Niiyama, M., Nozawa, Y., Ohkuma, H., Ohnishi, H., Ohta, T., Oishi, M., Ozawa, K., Ryu, S. Y., Sada, Y., Saito, H., Shibukawa, T., Shimizu, H., Shirai, R., Shoji, M., Sumihama, M., Suzuki, S., Tanaka, S., Taniuchi, Y., Tokiyasu, A. O., Tomida, N., Tsuchikawa, Y., Watanabe, K., Yoon, C. J., and Yoshida, C.

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

We have constructed a new laser-Compton-scattering facility, called the LEPS2 beamline, at the 8-GeV electron storage ring, SPring-8. This facility provides a linearly polarized photon beam in a tagged energy range of 1.3--2.4 GeV. Thanks to a small divergence of the low-emittance storage-ring electrons, the tagged photon beam has a size (sigma) suppressed to about 4 mm even after it travels about 130 m to the experimental building that is independent of the storage ring building and contains large detector systems. This beamline is designed to achieve a photon beam intensity higher than that of the first laser-Compton-scattering beamline at SPring-8 by adopting the simultaneous injection of up to four high-power laser beams and increasing a transmittance for the long photon-beam path up to about 77%. The new beamline is under operation for hadron photoproduction experiments.

Published
2021
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6. Search for $\eta'$ bound nuclei in the $^{12}{\rm C}(\gamma,p)$ reaction with simultaneous detection of decay products

Author

Tomida, N., Muramatsu, N., Niiyama, M., Ahn, J. K., Chang, W. C., Chen, J. Y., Chu, M. L., Daté, S., Gogami, T., Goto, H., Hamano, H., Hashimoto, T., He, Q. H., Hicks, K., Hiraiwa, T., Honda, Y., Hotta, T., Ikuno, H., Inoue, Y., Ishikawa, T., Jaegle, I., Jo, J. M., Kasamatsu, Y., Katsuragawa, H., Kido, S., Kon, Y., Maruyama, T., Masumoto, S., Matsumura, Y., Miyabe, M., Mizutani, K., Nagahiro, H., Nakamura, T., Nakano, T., Nam, T., Ngan, T. N. T., Nozawa, Y., Ohashi, Y., Ohnishi, H., Ohta, T., Ozawa, K., Rangacharyulu, C., Ryu, S. Y., Sada, Y., Sasagawa, M., Shibukawa, T., Shimizu, H., Shirai, R., Shiraishi, K., Strokovsky, E. A., Sugaya, Y., Sumihama, M., Suzuki, S., Tanaka, S., Tokiyasu, A., Tsuchikawa, Y., Ueda, T., Yamazaki, H., Yamazaki, R., Yanai, Y., Yorita, T., Yoshida, C., and Yosoi, M.

Subjects
Nuclear Experiment
Abstract

We measured missing mass spectrum of the $^{12}{\rm C}(\gamma,p)$ reaction for the first time in coincidence with potential decay products from $\eta'$ bound nuclei. We tagged an ($\eta+p$) pair associated with the $\eta'N\to\eta N$ process in a nucleus. After applying kinematical selections to reduce backgrounds, no signal events were observed in the bound-state region. An upper limit of the signal cross section in the opening angle $\cos\theta^{\eta p}_{lab}<-0.9$ was obtained to be 2.2 nb/sr at the 90$\%$ confidence level. It is compared with theoretical cross sections, whose normalization ambiguity is suppressed by measuring a quasifree $\eta'$ production rate. Our results indicate a small branching fraction of the $\eta'N\to\eta N$ process and/or a shallow $\eta'$-nucleus potential., Comment: 7 pages, 4 figures

Published
2020
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7. Measurement of KN scattering below the KN mass threshold

Author

Noumi Hiroyuki, Inoue Kentaro, Kawasaki Shingo, Aikawa Shuu, Ajimura Shuhei, Akaishi Takaya, Asano Hidemitsu, Beer George, Berucci Carolina, Bragadireau Mario, Buehler Paul Alois, Busso Luigi, Cargnelli Michael, Choi Seonho, Curceanu Catalina, Enomoto Shun, Fujioka Hiroyuki, Fujiwara Yuya, Fukuda Tomokazu, Guaraldo Carlo, Hashimoto Tadashi, Hayano Ryugo S., Hiraiwa Toshihiko, Iio Masami, Iliescu Mihai, Ishiguro Yusuke, Ishimoto Shigeru, Ishikawa Takashi, Ithashi Kenta, Iwai Massaki, Iwasaki Masahiko, Kanno Koki, Kato Kazuma, kato Yuko, Kienle Paul, Komatsu Yusuke, Kou Hiroshi, Ma Yue, Marton Johann, Matsuda Yasuyuki, MIzoi Yutaka, Morra Ombretta, Murayama Rie, Nagae To-mofumi, Ohnishi Hiroaki, Okada Shinji, Omar Zhadyra, Outa Haruhiko, Piscicchia Kristian, Sada Yuta, Sakaguchi Atsushi, Sakuma Fuminori, Sato Masaharu, Scordo Alessadro, Sekimoto Michiko, Shi Hexi, Shirotori Kotaro, Sirghi Diana, Sirghi Florin, Suzuki Ken, Suzuki Shoji, Suzuki Takatoshi, Tanida Kiyoshi, Tatsuno Hideyuki, Tokiyasu Atsushi O., Tokuda Makoto, Tomono Dai, Toyoda Akihisa, Tsukada Kyo, Vazquez-Doce Oton, Widmann Eberhard, Yamaga Takumi, Yamazaki Toshimitsu, Yim Heejoong, Zhang Qi, and Zmeskal Johannes

Subjects
Physics, QC1-999
Abstract

Abstract. We measured πE invariant mass spectra below and above the K¯N mass threshold in the K−d → NπE reaction in order to study the K¯N interaction and the Λ(1405) resonance. This reaction can be described by the two-step process: (i) K¯N1 → K¯N followed by (ii) K¯N2 → πΣ, where N1 and N2 are nucleons bound in the deuteron. We deduced the S -wave scattering amplitude of K¯N →K¯N in the framework of the K¯N πΣ coupled channel so as to reproduce the observed πΣ spectra in the I = 0 channel. We found a resonance pole at 1417.7-7.4+6.0 (fitting error)-1.0+1.1 (systematic error) - i[26.9-7.9+6.0 (fitting error)-2.0+1.7 (systematic error)]MeV/c2.

Published
2024
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9. SPring-8 LEPS2 beamline: A facility to produce a multi-GeV photon beam via laser Compton scattering

Author

Muramatsu, N., Yosoi, M., Yorita, T., Ohashi, Y., Ahn, J.K., Ajimura, S., Asano, Y., Chang, W.C., Chen, J.Y., Daté, S., Gogami, T., Hamano, H., Hashimoto, T., Hiraiwa, T., Hotta, T., Ishikawa, T., Kasamatsu, Y., Katsuragawa, H., Kobayakawa, R., Kohri, H., Masumoto, S., Matsumura, Y., Miyabe, M., Mizutani, K., Morino, Y., Nakano, T., Nam, T., Niiyama, M., Nozawa, Y., Ohkuma, H., Ohnishi, H., Ohta, T., Oishi, M., Ozawa, K., Ryu, S.Y., Sada, Y., Saito, H., Shibukawa, T., Shimizu, H., Shirai, R., Shoji, M., Sumihama, M., Suzuki, S., Tanaka, S., Taniuchi, Y., Tokiyasu, A.O., Tomida, N., Tsuchikawa, Y., Watanabe, K., Yoon, C.J., and Yoshida, C.

Published
2022
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10. First measurement of coherent $\phi$-meson photoproduction from helium-4 near threshold

Author

LEPS Collaboration, Hiraiwa, T., Yosoi, M., Niiyama, M., Morino, Y., Nakatsugawa, Y., Sumihama, M., Ahn, D. S., Ahn, J. K., Chang, W. C., Chen, J. Y., Daté, S., Fujimura, H., Fukui, S., Hicks, K., Hotta, T., Hwang, S. H., Ishikawa, T., Kato, Y., Kawai, H., Kohri, H., Kon, Y., Lin, P. J., Maeda, Y., Miyabe, M., Mizutani, K., Muramatsu, N., Nakano, T., Nozawa, Y., Ohashi, Y., Ohta, T., Oka, M., Rangacharyulu, C., Ryu, S. Y., Saito, T., Sawada, T., Shimizu, H., Strokovsky, E. A., Sugaya, Y., Suzuki, K., Tokiyasu, A. O., Tomioka, T., Tsunemi, T., Uchida, M., and Yorita, T.

Subjects
Nuclear Experiment
Abstract

The differential cross sections and decay angular distributions for coherent $\phi$-meson photoproduction from helium-4 have been measured for the first time at forward angles with linearly polarized photons in the energy range $E_{\gamma} = \text{1.685-2.385 GeV}$. Thanks to the target with spin-parity $J^{P} = 0^{+}$, unnatural-parity exchanges are prohibited, and thus natural-parity exchanges can be investigated clearly. The decay asymmetry with respect to photon polarization is shown to be very close to the maximal value. This ensures the dominance ($> 94\%$) of natural-parity exchanges in this reaction. To evaluate the contribution from natural-parity exchanges to the forward cross section ($\theta = 0^\circ$) for the $\gamma p \rightarrow \phi p$ reaction near the threshold, the energy dependence of the forward cross section ($\theta = 0^\circ$) for the $\gamma {^{4}\text{He}} \rightarrow \phi {^{4}\text{He}}$ reaction was analyzed. The comparison to $\gamma p \rightarrow \phi p$ data suggests that enhancement of the forward cross section arising from natural-parity exchanges, and/or destructive interference between natural-parity and unnatural-parity exchanges is needed in the $\gamma p \rightarrow \phi p$ reaction near the threshold., Comment: 6 pages, 4 figures

Published
2017
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11. $\phi$ photoproduction on the proton at $E_{\gamma}$ = 1.5 - 2.9 GeV

Author

Mizutani, K., Niiyama, M., Nakano, T., Yosoi, M., Nozawa, Y., Ahn, D. S., Ahn, J. K., Chang, W. C., Chen, J. Y., Daté, S., Gohn, W., Hamano, H., Hashimoto, T., Hicks, K., Hiraiwa, T., Hotta, T., Hwang, S. H., Ishikawa, T., Joo, K., Jung, W. S., Kato, Y., Katsuragawa, H., Kim, M. H., Kim, S. H., Kohri, H., Kon, Y., Lee, H. S., Maeda, Y., Matsumura, Y., Mibe, T., Miyabe, M., Morino, Y., Muramatsu, N., Nakatsugawa, Y., Noumi, H., Ohashi, Y., Ohta, T., Oka, M., Park, J. B., Parker, J. D., Rangacharyulu, C., Ryu, S. Y., Sada, Y., Sawada, T., Shibukawa, T., Shiu, S. H., Sugaya, Y., Sumihama, M., Tanaka, S., Tokiyasu, A. O., Tomida, N., Tran, H. N., Tsunemi, T., Uchida, M., Ungaro, M., and Yanai, Y.

Subjects
Nuclear Experiment
Abstract

Differential cross sections at $t=t_{\text{min}}$ and decay asymmetries for the $\gamma p\rightarrow\phi p$ reaction have been measured using linearly polarized photons in the range 1.5 to 2.9 GeV. These cross sections were used to determine the Pomeron strength factor. The cross sections and decay asymmetries are consistently described by the $t$-channel Pomeron and pseudoscalar exchange model in the $E_{\gamma}$ region above 2.37 GeV. In the lower energy region, an excess over the model prediction is observed in the energy dependence of the differential cross sections at $t=t_{\text{min}}$. This observation suggests that additional processes or interference effects between Pomeron exchange and other processes appear near the threshold region., Comment: 6 pages, 7 figures

Published
2017
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12. Missing-mass spectroscopy with the ${}^{6}$Li($\pi^{-}, K^{+}$)X reaction to search for ${}^{6}_{\Lambda}$H

Author

Honda, R., Agnello, M., Ahn, J. K., Ajimura, S., Akazawa, Y., Amano, N., Aoki, K., Bhang, H. C., Chiga, N., Endo, M., Evtoukhovitch, P., Feliciello, A., Fujioka, H., Fukuda, T., Hasegawa, S., Hayakawa, S. H., Hosomi, K., Hwang, S. H., Ichikawa, Y., Igarashi, Y., Imai, K., Ishibashi, N., Iwasaki, R., Joo, C. W., Kiuchi, R., Lee, J. K., Lee, J. Y., Matsuda, K., Matsumoto, Y., Matsuoka, K., Miwa, K., Mizoi, Y., Moritsu, M., Nagae, T., Nagamiya, S., Nakagawa, M., Naruki, M., Noumi, H., Ota, R., Roy, B. J., Saha, P. K., Sakaguchi, A., Sako, H., Samanta, C., Samoilov, V., Sasaki, Y., Sato, S., Sekimoto, M., Shimizu, Y., Shiozaki, T., Shirotori, K., Soyama, T., Sugimura, H., Takahashi, T., Takahashi, T. N., Tamura, H., Tanabe, K., Tanaka, T., Tanida, K., Tokiyasu, A. O., Tsamalaidze, Z., Ukai, M., Yamamoto, T. O., Yamamoto, Y., Yang, S. B., and Yoshida, K.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

We searched for the bound state of the neutron-rich $\Lambda$-hypernucleus ${}^{6}_{\Lambda}$H, using the ${}^{6}$Li($\pi^{-}, K^{+}$)X double charge-exchange reaction at a $\pi^{-}$ beam momentum of 1.2 GeV/c at J-PARC. A total of $1.4 \times 10^{12}$ $\pi^{-}$ was driven onto a ${}^{6}$Li target of 3.5-g/$\rm cm^2$ thickness. No event was observed below the bound threshold, i.e., the mass of ${}^{4}_{\Lambda}$H + 2n, in the missing-mass spectrum of the ${}^{6}$Li($\pi^{-}, K^{+}$)X reaction in the $2^{\circ}$ < $\theta_{\pi K}$ < $20^{\circ}$ angular range. Furthermore, no event was found up to 2.8 MeV/$c^2$ above the bound threshold. We obtained the the double-differential cross section spectra of the ${}^{6}$Li($\pi^{-}, K^{+}$)X reaction in the angular range of $2^{\circ}$ < $\theta_{\pi K}$ < $14^{\circ}$. An upper limit of 0.56 nb/sr (90% C.L.) was obtained for the production cross section of the ${}^{6}_{\Lambda}$H hypernucleus bound state. In addition, not only the bound state region, but also the $\Lambda$ continuum region and part of the $\Sigma^{-}$ quasi-free production region of the ${}^{6}$Li($\pi^{-}, K^{+}$)X reaction, were obtained with high statistics. The present missing-mass spectrum will facilitate the investigation of the $\Sigma^{-}$-nucleus optical potential for $\Sigma^{-}$-${}^{5}$He through spectrum shape analysis., Comment: 24 pages, 17 figures

Published
2017
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13. The Role of Collision Ionization of K-Shell Ions in Nonequilibrium Plasmas Produced by the Action of Super Strong, Ultrashort PW-Class Laser Pulses on Micron-Scale Argon Clusters with Intensity up to 5 × 1021 W/cm2

Author

Igor Yu. Skobelev, Sergey N. Ryazantsev, Roman K. Kulikov, Maksim V. Sedov, Evgeny D. Filippov, Sergey A. Pikuz, Takafumi Asai, Masato Kanasaki, Tomoya Yamauchi, Satoshi Jinno, Masato Ota, Syunsuke Egashira, Kentaro Sakai, Takumi Minami, Yuki Abe, Atsushi Tokiyasu, Hideki Kohri, Yasuhiro Kuramitsu, Youichi Sakawa, Yasuhiro Miyasaka, Kotaro Kondo, Akira Kon, Akito Sagisaka, Koichi Ogura, Alexander S. Pirozhkov, Masaki Kando, Hiromitsu Kiriyama, Tatiana A. Pikuz, and Yuji Fukuda

Subjects
argon clusters, laser–cluster interaction, collisional ionization, optical field ionization, X-ray spectroscopy, highly charged ions, Applied optics. Photonics, TA1501-1820
Abstract

The generation of highly charged ions in laser plasmas is usually associated with collisional ionization processes that occur in electron–ion collisions. An alternative ionization channel caused by tunnel ionization in an optical field is also capable of effectively producing highly charged ions with ionization potentials of several kiloelectronvolts when the laser intensity q > 1020 W/cm2. It is challenging to clearly distinguish the impacts of the optical field and collisional ionizations on the evolution of the charge state of a nonequilibrium plasma produced by the interaction of high-intensity, ultrashort PW-class laser pulses with dense matter. In the present work, it is shown that the answer to this question can be obtained in some cases by observing the X-ray spectral lines caused by the transition of an electron into the K-shell of highly charged ions. The time-dependent calculations of plasma kinetics show that this is possible, for example, if sufficiently small clusters targets with low-density background gas are irradiated. In the case of Ar plasma, the limit of the cluster radius was estimated to be R0 = 0.1 μm. The calculation results for argon ions were compared with the results of the experiment at the J-KAREN-P laser facility at QST-KPSI.

Published
2023
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14. Pole position of Λ(1405) measured in d(K−,n)πΣ reactions

Author

S. Aikawa, S. Ajimura, T. Akaishi, H. Asano, G. Beer, C. Berucci, M. Bragadireanu, P. Buehler, L. Busso, M. Cargnelli, S. Choi, C. Curceanu, S. Enomoto, H. Fujioka, Y. Fujiwara, T. Fukuda, C. Guaraldo, T. Hashimoto, R.S. Hayano, T. Hiraiwa, M. Iio, M. Iliescu, K. Inoue, Y. Ishiguro, S. Ishimoto, T. Ishikawa, K. Itahashi, M. Iwai, M. Iwasaki, K. Kanno, K. Kato, Y. Kato, S. Kawasaki, P. Kienle, Y. Komatsu, H. Kou, Y. Ma, J. Marton, Y. Matsuda, Y. Mizoi, O. Morra, R. Murayama, T. Nagae, H. Noumi, H. Ohnishi, S. Okada, Z. Omar, H. Outa, K. Piscicchia, Y. Sada, A. Sakaguchi, F. Sakuma, M. Sato, A. Scordo, M. Sekimoto, H. Shi, K. Shirotori, D. Sirghi, F. Sirghi, K. Suzuki, S. Suzuki, T. Suzuki, K. Tanida, H. Tatsuno, A.O. Tokiyasu, M. Tokuda, D. Tomono, A. Toyoda, K. Tsukada, O. Vazquez-Doce, E. Widmann, T. Yamaga, T. Yamazaki, H. Yim, Q. Zhang, and J. Zmeskal

Subjects
Hyperon resonance, Meson-baryon bound state, Kaon-nucleon interation, Scattering amplitude, Physics, QC1-999
Abstract

We measured a set of π±Σ∓, π0Σ0, and π−Σ0 invariant mass spectra below and above the K¯N mass threshold in K−-induced reactions on deuteron. The measured πΣ mass spectral shape is well reproduced via the two-step mechanism, i.e., a neutron knocked out at a forward angle from a deuteron by an incident K−, with the K¯ recoiled backward reacting with the residual nucleon to produce π and Σ. We deduced the S-wave K¯N→πΣ and K¯N→K¯N scattering amplitudes in the isospin 0 channel in the framework of a K¯N and πΣ coupled channel. We find that a resonance pole corresponding to Λ(1405) is located at 1417.7−7.4+6.0 (fitting errors)−1.0+1.1 (systematic errors) + [−26.1−7.9+6.0 (fitting errors)−2.0+1.7 (systematic errors)] i MeV/c2, closer to the K¯N mass threshold than the value determined by the Particle Data Group.

Published
2023
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15. Optimization of laser-driven quantum beam generation and the applications with artificial intelligence

Author

Kuramitsu, Y., primary, Taguchi, T., additional, Nikaido, F., additional, Minami, T., additional, Hihara, T., additional, Suzuki, S., additional, Oda, K., additional, Kuramoto, K., additional, Yasui, T., additional, Abe, Y., additional, Ibano, K., additional, Takabe, H., additional, Chu, C. M., additional, Wu, K. T., additional, Woon, W. Y., additional, Chen, S. H., additional, Jao, C. S., additional, Chen, Y. C., additional, Liu, Y. L., additional, Morace, A., additional, Yogo, A., additional, Arikawa, Y., additional, Kohri, H., additional, Tokiyasu, A., additional, Kodaira, S., additional, Kusumoto, T., additional, Kanasaki, M., additional, Asai, T., additional, Fukuda, Y., additional, Kondo, K., additional, Kiriyama, H., additional, Hayakawa, T., additional, Tanaka, S. J., additional, Isayama, S., additional, Watamura, N., additional, Suzuki, H., additional, Kumar, H. S., additional, Ohnishi, N., additional, Pikuz, T., additional, Filippov, E., additional, Sakai, K., additional, Yasuhara, R., additional, Nakata, M., additional, Ishikawa, R., additional, Hoshi, T., additional, Mizuta, A., additional, Bolouki, N., additional, Saura, N., additional, Benkadda, S., additional, Koenig, M., additional, and Hamaguchi, S., additional

Published
2024
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16. Performance of the FOREST/BLC Spectrometer for Study of the Reaction

Author

Miyata, S., Aoki, K., Fujioka, H., Honda, Y., Hotta, T., Ishikawa, T., Itahashi, K., Kanda, H., Kawai, H., Maeda, K., Miyabe, M., Matsumura, Y., Muramatsu, N., Ohnishi, H., Ozawa, K., Shimizu, H., Tabata, M., Tokiyasu, A. O., Tsuchikawa, Y., Ueda, T., Yoshida, C., Orr, N. A., editor, Ploszajczak, M., editor, Marqués, F. M., editor, and Carbonell, J., editor

Published
2020
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17. Interference effect between $\phi$ and $\Lambda(1520)$ production channels in the $\gamma p \rightarrow K^+K^-p$ reaction near threshold

Author

Ryu, S. Y., Ahn, J. K., Nakano, T., Ahn, D. S., Ajimura, S., Akimune, H., Asano, Y., Chang, W. C., Chen, J. Y., Date, S., Ejiri, H., Fujimura, H., Fujiwara, M., Fukui, S., Hasegawa, S., Hicks, K., Horie, K., Hotta, T., Hwang, S. H., Imai, K., Ishikawa, T., Iwata, T., Kato, Y., Kawai, H., Kino, K., Kohri, H., Kon, Y., Kumagai, N., Lin, P. J., Maeda, Y., Makino, S., Matsuda, T., Matsuoka, N., Mibe, T., Miyabe, M., Miyachi, M., Morino, Y., Muramatsu, N., Murayama, R., Nakatsugawa, Y., Nam, S. i., Niiyama, M., Nomachi, M., Ohashi, Y., Ohkuma, H., Ohta, T., Ooba, T., Oshuev, D. S., Parker, J. D., Rangacharyulu, C., Sakaguchi, A., Sawada, T., Shagin, P. M., Shiino, Y., Shimizu, H., Strokovsky, E. A., Sugaya, Y., Sumihama, M., Tokiyasu, A. O., Toi, Y., Toyokawa, H., Tsunemi, T., Uchida, M., Ungaro, M., Wakai, A., Wang, C. W., Wang, S. C., Yonehara, K., Yorita, T., Yoshimura, M., Yosoi, M., and Zegers, R. G. T.

Subjects
Nuclear Experiment
Abstract

The $\phi$-$\Lambda(1520)$ interference effect in the $\gamma p\to K^+K^-p$ reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between $\phi$ and $\Lambda(1520)$ production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when $K^+K^-$ pairs are observed at forward angles, but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the $\sqrt{s}=2.1$ GeV bump structure in forward differential cross sections for $\phi$ photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange and rescattering processes via other hyperon states.

Published
2016
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18. Automation of etch pit analyses on solid-state nuclear track detectors with machine learning for laser-driven ion acceleration

Author

Taguchi, T., primary, Minami, T., additional, Hihara, T., additional, Nikaido, F., additional, Asai, T., additional, Sakai, K., additional, Abe, Y., additional, Yogo, A., additional, Arikawa, Y., additional, Kohri, H., additional, Tokiyasu, A. O., additional, Chu, C. M., additional, Woon, W. Y., additional, Kodaira, S., additional, Kanasaki, M., additional, Fukuda, Y., additional, and Kuramitsu, Y., additional

Published
2024
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22. The Role of Collision Ionization of K-Shell Ions in Nonequilibrium Plasmas Produced by the Action of Super Strong, Ultrashort PW-Class Laser Pulses on Micron-Scale Argon Clusters with Intensity up to 5 × 1021 W/cm2

Author

Skobelev, Igor Yu., primary, Ryazantsev, Sergey N., additional, Kulikov, Roman K., additional, Sedov, Maksim V., additional, Filippov, Evgeny D., additional, Pikuz, Sergey A., additional, Asai, Takafumi, additional, Kanasaki, Masato, additional, Yamauchi, Tomoya, additional, Jinno, Satoshi, additional, Ota, Masato, additional, Egashira, Syunsuke, additional, Sakai, Kentaro, additional, Minami, Takumi, additional, Abe, Yuki, additional, Tokiyasu, Atsushi, additional, Kohri, Hideki, additional, Kuramitsu, Yasuhiro, additional, Sakawa, Youichi, additional, Miyasaka, Yasuhiro, additional, Kondo, Kotaro, additional, Kon, Akira, additional, Sagisaka, Akito, additional, Ogura, Koichi, additional, Pirozhkov, Alexander S., additional, Kando, Masaki, additional, Kiriyama, Hiromitsu, additional, Pikuz, Tatiana A., additional, and Fukuda, Yuji, additional

Published
2023
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23. Performance of the FOREST/BLC Spectrometer for Study of the $$\eta $$-nucleon Interaction via the $$\gamma d \rightarrow p\eta n$$ Reaction

Author

Miyata, S., primary, Aoki, K., additional, Fujioka, H., additional, Honda, Y., additional, Hotta, T., additional, Ishikawa, T., additional, Itahashi, K., additional, Kanda, H., additional, Kawai, H., additional, Maeda, K., additional, Miyabe, M., additional, Matsumura, Y., additional, Muramatsu, N., additional, Ohnishi, H., additional, Ozawa, K., additional, Shimizu, H., additional, Tabata, M., additional, Tokiyasu, A. O., additional, Tsuchikawa, Y., additional, Ueda, T., additional, and Yoshida, C., additional

Published
2020
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24. Preparation status of missing-mass spectroscopy for 𝚵 hypernuclei with S-2S magnetic spectrometer

Author

Ebata Kengo, Fujioka H., Fujita M., Gogami T., Harada T. K., Hayakawa S. H., Honda R., Ichikawa Y., Kamada K., Kobori T., Miwa K., Nagae T., Nanamura T., Negishi R., Oura F., Sakao T., Son C., Takahashi T., Takahashi H., Tamura H., Tokiyasu A. O., Ukai M., and Yamamoto T. O.

Subjects
Physics, QC1-999
Abstract

J-PARC E70 experiment measures the missing-mass of Ξ hypernuclei (12ΞBe) in Hadron Experimental Facility at J-PARC. We aim to reach the best missing-mass resolution of 2 MeV/c2 in FWHM with a new magnetic spectrometer S-2S. The high-resolution spectroscopy of Ξ hypernuclei will play an important role to understand the unknown ΞN interaction. The experiment will start at the beginning of 2023. This article presents the preparation status.

Published
2022
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25. A spectroscopic study of 𝚵10Li hypernucleus via the 10B(K−,K+)X reaction

Author

Tokiyasu Atsushi

Subjects
Physics, QC1-999
Abstract

We are planning a 10ΞLi production experiment using the 10B(K−,K+)X reaction at the J-PARC, K1.8 beamline. We perform spectroscopy of missing masses using the S − 2S spectrometer, which can achieve high resolution. Since the cross section of Ξ-hypernuclei is very small, we would like to use a thick target. To ensure the missing mass resolution, we propose a semiinclusive method using a tracking device to detect the decay particles from Ξ-hypernuclei.

Published
2022
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26. Strangeness physics programs by S-2S at J-PARC

Author

Gogami Toshiyuki, Achenbach Patrick, Ahn Jung Keun, Androić Darko, Aoki Kanae, Asaturyan Arshak, Botta Elena, Bukhari Masroor. H., Camsonne Alexandre, Covrig Silviu. C., Ebata Kengo, Ekawa Hiroyuki, Evtoukhovitch Petr, Feliciello Alessandro, Fujioka Hiroyuki, Fujita Manami, Garibaldi Franco, Harada Takeshi. K., Hasegawa Shoichi, Hasegawa Tomoyuki, Hayakawa Shuhei. H., Hirose Erina, Honda Ryotaro, Hosomi Kenji, Ichikawa Yudai, Imai Kenichi, Ishige Tatsuhiro, Jung Wooseung, Kamada Kento, Kanatsuki Shunsuke, Kato Seigo, Kim Shinhyung. H., Kobori Takumi, Marcello Simonetta, Markowitz Pete, Miwa Koji, Mkrtchyan Arthur, Mkrtchyan Hamlet, Moritsu Manabu, Nagae Tomofumi, Nagao Sho, Nakagawa Manami, Nakamura Satoshi. N., Nanamura Takuya, Naruki Megumi, Negishi Ryosuke, Okuyama Kazuki, Oura Fumiya, Pandey Bishnu, Pochodzalla Josef, Sakaguchi Atsushi, Sakao Tamao, Sako Hiroyuki, Samanta Chhanda, Sato Susumu, Shabestari Mitra. H., Shahinyan Albert, Shirotori Kotaro, Širca Simon, Son C., Sugimura Hitoshi, Takahashi Hitoshi, Takahashi Shuji, Takahashi Tomonori, Takahashi Toshiyuki, Tamura Hirokazu, Tanida Kiyoshi, Tokiyasu Atsushi, Tsamalaidze Zviadi, Uchida Makoto, Ukai Mifuyu, Une Chiaki, Urciuoli Guido. M., and Yamamoto Takeshi. O.

Subjects
Physics, QC1-999
Abstract

In the K1.8 beam-line at Hadron Experimental Facility of J-PARC, a new magnetic spectrometer S-2S is being installed. S-2S was designed to achieve a high momentum resolution of Δp/p = 6 × 10−4 in FWHM. Several strangeness-physics programs which require the high resolution will be realized by S-2S. The present article introduces J-PARC E70 (missing-mass spectroscopy of Ξ12Be) and E94 (missing-mass spectroscopy of Λ7Li, Λ10B, and Λ12C) experiments.

Published
2022
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28. A fast profile monitor with scintillating fiber hodoscopes for high-intensity photon beams

Author

Ishikawa, T., Fujimura, H., Hamano, H., Hashimoto, R., Honda, Y., Ishida, T., Kaida, S., Kanda, H., Kido, S., Matsumura, Y., Miyabe, M., Mizutani, K., Nagasawa, I., Nakamura, A., Nanbu, K., Nawa, K., Ogushi, S., Shibasaki, Y., Shimizu, H., Sugai, H., Suzuki, K., Takahashi, K., Takahashi, S., Taniguchi, Y., Tokiyasu, A.O., Tsuchikawa, Y., and Yamazaki, H.

Published
2016
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29. The Role of Collision Ionization of K-Shell Ions in Nonequilibrium Plasmas Produced by the Action of Super Strong, Ultrashort PW-Class Laser Pulses on Micron-Scale Argon Clusters with Intensity up to 5 × 10 21 W/cm 2.

Author

Skobelev, Igor Yu., Ryazantsev, Sergey N., Kulikov, Roman K., Sedov, Maksim V., Filippov, Evgeny D., Pikuz, Sergey A., Asai, Takafumi, Kanasaki, Masato, Yamauchi, Tomoya, Jinno, Satoshi, Ota, Masato, Egashira, Syunsuke, Sakai, Kentaro, Minami, Takumi, Abe, Yuki, Tokiyasu, Atsushi, Kohri, Hideki, Kuramitsu, Yasuhiro, Sakawa, Youichi, and Miyasaka, Yasuhiro

Subjects
ULTRASHORT laser pulses, ULTRA-short pulsed lasers, LASER plasmas, NONEQUILIBRIUM plasmas, ELECTRON-ion collisions, ARGON, IONS
Abstract

The generation of highly charged ions in laser plasmas is usually associated with collisional ionization processes that occur in electron–ion collisions. An alternative ionization channel caused by tunnel ionization in an optical field is also capable of effectively producing highly charged ions with ionization potentials of several kiloelectronvolts when the laser intensity q > 1020 W/cm2. It is challenging to clearly distinguish the impacts of the optical field and collisional ionizations on the evolution of the charge state of a nonequilibrium plasma produced by the interaction of high-intensity, ultrashort PW-class laser pulses with dense matter. In the present work, it is shown that the answer to this question can be obtained in some cases by observing the X-ray spectral lines caused by the transition of an electron into the K-shell of highly charged ions. The time-dependent calculations of plasma kinetics show that this is possible, for example, if sufficiently small clusters targets with low-density background gas are irradiated. In the case of Ar plasma, the limit of the cluster radius was estimated to be R0 = 0.1 μm. The calculation results for argon ions were compared with the results of the experiment at the J-KAREN-P laser facility at QST-KPSI. [ABSTRACT FROM AUTHOR]

Published
2023
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30. Pole position of Λ(1405) measured in d(K−,n)πΣ reactions

Author

Aikawa, S., primary, Ajimura, S., additional, Akaishi, T., additional, Asano, H., additional, Beer, G., additional, Berucci, C., additional, Bragadireanu, M., additional, Buehler, P., additional, Busso, L., additional, Cargnelli, M., additional, Choi, S., additional, Curceanu, C., additional, Enomoto, S., additional, Fujioka, H., additional, Fujiwara, Y., additional, Fukuda, T., additional, Guaraldo, C., additional, Hashimoto, T., additional, Hayano, R.S., additional, Hiraiwa, T., additional, Iio, M., additional, Iliescu, M., additional, Inoue, K., additional, Ishiguro, Y., additional, Ishimoto, S., additional, Ishikawa, T., additional, Itahashi, K., additional, Iwai, M., additional, Iwasaki, M., additional, Kanno, K., additional, Kato, K., additional, Kato, Y., additional, Kawasaki, S., additional, Kienle, P., additional, Komatsu, Y., additional, Kou, H., additional, Ma, Y., additional, Marton, J., additional, Matsuda, Y., additional, Mizoi, Y., additional, Morra, O., additional, Murayama, R., additional, Nagae, T., additional, Noumi, H., additional, Ohnishi, H., additional, Okada, S., additional, Omar, Z., additional, Outa, H., additional, Piscicchia, K., additional, Sada, Y., additional, Sakaguchi, A., additional, Sakuma, F., additional, Sato, M., additional, Scordo, A., additional, Sekimoto, M., additional, Shi, H., additional, Shirotori, K., additional, Sirghi, D., additional, Sirghi, F., additional, Suzuki, K., additional, Suzuki, S., additional, Suzuki, T., additional, Tanida, K., additional, Tatsuno, H., additional, Tokiyasu, A.O., additional, Tokuda, M., additional, Tomono, D., additional, Toyoda, A., additional, Tsukada, K., additional, Vazquez-Doce, O., additional, Widmann, E., additional, Yamaga, T., additional, Yamazaki, T., additional, Yim, H., additional, Zhang, Q., additional, and Zmeskal, J., additional

Published
2023
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33. Mass-resolved ion measurement by particle counting analysis for characterizing relativistic ion beams driven by lasers

Author

Minami, T., primary, Tokiyasu, A. O., additional, Kohri, H., additional, Abe, Y., additional, Iwasaki, K., additional, Taguchi, T., additional, Oda, K., additional, Suzuki, S., additional, Asai, T., additional, Tanaka, S. J., additional, Isayama, S., additional, Kanasaki, M., additional, Kodaira, S., additional, Fukuda, Y., additional, and Kuramitsu, Y., additional

Published
2022
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34. MPV—Parallel Readout Architecture for the VME Data Acquisition System

Author

Shuichi Ota, Daiki Nishimura, Hidetada Baba, Takashi Ichihara, Susumu Shimoura, Juzo Zenihiro, A. O. Tokiyasu, S. Takeuchi, R. Yokoyama, H. M. Shimizu, T. Ohnishi, T. Isobe, K. Yoshida, and Yukinobu Watanabe

Subjects
Nuclear and High Energy Physics, business.industry, Computer science, Data acquisition, Nuclear Energy and Engineering, Backplane, Gate array, Eurocard, Systems architecture, Electrical and Electronic Engineering, business, Field-programmable gate array, Throughput (business), Computer hardware, VMEbus
Abstract

Mountable controller with parallelized VERSA Module Eurocard (VME) (MPV) is a VME-compatible system having a parallel readout architecture. This article presents the system architecture and its data acquisition performance. In this system, the readout sequence is implemented in a field-programmable gate array (FPGA) to achieve the ideal VME bus speed. Data from multiple VME slave modules are read out in parallel, merged, and sent to a server. Maximum data throughput of 400 Mbps was achieved. Thus, the MPV system can dramatically improve the performance of VME data acquisition systems.

Published
2021
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35. A scintillator pixel array for real-time spectroscopy of GeV-scale and multi-species ions produced in laser-plasma experiments

Author

Takumi, Minami, Yuki, Abe, Kou, Iwasaki, Tomoya, Taguchi, Kazumasa, Oda, Soichiro, Suzuki, Takafumi, Asai, Shuta, Tanaka, Masato, Kanasaki, Satoshi, Kodaira, Yuji, Fukuda, Tokiyasu, Atsushi, Kohri, Hideki, and Yasuhiro, Kuramitsu

Abstract

After the development of chirped pulse amplification by G. Mouro, laser ion acceleration has attracted a lot of interest for various fields of research, such as high energy density physics, nuclear physics, and fast ignition scheme in inertial confinement fusion. Recent theoretical and numerical investigations predict generation of sub-GeV to GeV energy ions. However, it is difficult to discriminate GeV-scale ions into different mass and energies using conventional diagnostic instruments (e.g. Thomson parabola spectrometer, solid state nuclear track detector). We have developed a novel diagnostic system based on particle counting analysis (PCA), which is generally used in nuclear physics experiments. The diagnosis provides a mass-dependent ion spectrum based on time-of-flight and pulse-height analysis of single particle events. With a novel arrangement of multiple scintillators with different ion stopping powers, PCA offers potential advantages over commonly used diagnostics in terms of coverage solid angle, detection efficiency, and real-time analysis for GeV-scale ions. The basic detector setup was tested using the Heavy Ion Medical Accelerator in Chiba (HIMAC) in Japan. Our system shows its ability to resolve protons, B^5+, C^6+, and O^8+ ion beams with energy range of 60-430 MeV/u. We also discuss an advanced detector design using multi-layered scintillator pixel array coupled with avalanche photodiodes, which allows angularly-resolved analysis and makes PCA more practical diagnostic technique in laser-driven particle acceleration experiments., High Temperature Plasma Diagnostics Conference 2022

Published
2022

36. A multi-stage scintillation counter for GeV-scale multi-species ion spectroscopy in laser-driven particle acceleration experiments

Author

Abe, Y., Kohri, H., Tokiyasu, A., Takumi, Minami, Iwasaki, K., Taguchi, T., Takafumi, Asai, Kanasaki, M., Satoshi, Kodaira, S. Fujioka, Kuramitsu, Y., Yuji, Fukuda, Abe, Y., Kohri, H., Tokiyasu, A., Takumi, Minami, Iwasaki, K., Taguchi, T., Takafumi, Asai, Kanasaki, M., Satoshi, Kodaira, S. Fujioka, Kuramitsu, Y., and Yuji, Fukuda

Abstract

Particle counting analysis (PCA) with multi-stage scintillation detector shows a new perspective on angularly- resolved spectral characterizations of GeV-scale, multi-species ion beams produced by high-power lasers. The diagnosis provides a mass-dependent ion energy spectrum based on time-of-flight and pulse-height analysis of single particle events detected through repetitive experiments. With a novel arrangement of multiple scintil- lators with different ions stopping powers, PCA offers potential advantages over commonly used diagnostics (CR-39, radiochromic films, Thomson parabola etc.) in terms of coverage solid angle, detection efficiency for GeV-ions, and shot-to-shot analysis in high repetition experiments. The basic detector design was tested using a 230-MeV proton beam from the Heavy Ion Medical Accelerator in Chiba (HIMAC), where we demon- strated its ability to discriminate major ion species accelerated in laser-plasma experiments (i.e. protons, deuterons, carbon and oxygen ions) with excellent energy and mass resolution. The proposed diagnostic concept would be essential for better understanding of laser-driven particle acceleration, which paves the way towards all-optical compact accelerators for a range of applications.

Published
2022

38. Pole position of $Λ(1405)$ measured in $d(K^-,n)πΣ$ reactions

Author

PARC E31 Collaboration, Aikawa, S., Ajimura, S., Akaishi, T., Asano, H., Beer, G., Berucci, C., Bragadireanu, M., Buehler, P., Busso, L., Cargnelli, M., Choi, S., Curceanu, C., Enomoto, S., Fujioka, H., Fujiwara, Y., Fukuda, T., Guaraldo, C., Hashimoto, T., Hayano, R. S., Hiraiwa, T., Iio, M., Iliescu, M., Inoue, K., Ishiguro, Y., Ishimoto, S., Ishikawa, T., Itahashi, K., Iwai, M., Iwasaki, M., Kanno, K., Kato, K., Kato, Y., Kawasaki, S., Kienle, P., Komatsu, Y., Kou, H., Ma, Y., Marton, J., Matsuda, Y., Mizoi, Y., Morra, O., Murayama, R., Nagae, T., Noumi, H., Ohnishi, H., Okada, S., Omar, Z., Outa, H., Piscicchia, K., Sada, Y., Sakaguchi, A., Sakuma, F., Sato, M., Scordo, A., Sekimoto, M., Shi, H., Shirotori, K., Sirghi, D., Sirghi, F., Suzuki, K., Suzuki, S., Suzuki, T., Tanida, K., Tatsuno, H., Tokiyasu, A. O., Tokuda, M., Tomono, D., Toyoda, A., Tsukada, K., Vazquez-Doce, O., Widmann, E., Yamaga, T., Yamazaki, T., Yim, H., Zhang, Q., and Zmeskal, J.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex)
Abstract

We measured a set of $π^\pmΣ^\mp$, $π^0Σ^0$, and $π^-Σ^0$ invariant mass spectra below and above the $\bar{K}N$ mass threshold in $K^-$-induced reactions on deuteron. We deduced the $S$-wave $\bar{K}N\rightarrowπΣ$ and $\bar{K}N\rightarrow\bar{K}N$ scattering amplitudes in the isospin 0 channel in the framework of a $\bar{K}N$ and $πΣ$ coupled channel. We find that a resonance pole corresponding to $Λ(1405)$ is located at 1417.7$^{+6.0}_{-7.4}$(fitting errors)$^{+1.1}_{-1.0}$(systematic errors) + $[-26.1^{+6.0}_{-7.9}$(fitting errors)$^{+1.7}_{-2.0}$(systematic errors)]$i$ MeV/$c^2$, closer to the $\bar{K}N$ mass threshold than the value determined by the Particle Data Group., 8 pages, 5 figures

Published
2022
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40. Development of relativistic ion detector for laser-driven ion acceleration

Author

Kuramitsu, Y., Abe, Y., Kohri, H., Tokiyasu, A., Minami, T., Iwasaki, K., Hihara, T., Taguchi, T., Sakai, K., Himen, K., Nishimoto, T., Takano, M., Habara, H., Kanasaki, M., Nakagawa, T., Oda, K., Yamauchi, T., Isayama, S., Tanaka, S., Yamazaki, R., Jinno, S., Chen, S.H., Liao, Y.T., Woon, W.Y., Fujioka, S., Takafumi, Asai, Kotaro, Kondo, Hiromitsu, Kiriyama, and Yuji, Fukuda

Subjects
Physics::Instrumentation and Detectors, Physics::Plasma Physics, Physics::Accelerator Physics
Abstract

Recent theoretical and numerical studies on laser-driven ion acceleration shows sub- relativistic ion acceleration with multistep acceleration schemes. The multistep acceleration with multiple laser pulses and multiple targets allow us to access the relativistic ion regime with the current and the future laser facilities. However, there is no relativistic ion detectors available in the field of laser ion acceleration. We have been developing energetic ion diagnostics using a combination of solid state nuclear path tracker and Thomson parabola, and scintillator base relativistic ion detectors commonly used in nuclear physics. We introduce our recent progress on the laser driven ion acceleration and the novel diagnostics., 日本物理学会2021年秋季大会

Published
2021

41. Correction to: Search for the Lightest Double-$$\Lambda $$ Hypernucleus, $${ _{\varvec{\Lambda }\varvec{\Lambda }}^{\varvec{5}}}$$H, at J-PARC

Author

Tomokazu Fukuda, Emiko Hiyama, S. Ajimura, Hiroyuki Fujioka, Yuhei Morino, Tomofumi Nagae, Yosuke Taki, Akane Sakaue, Sho Nagao, Toshiyuki Takahashi, Toshiyuki Gogami, Makoto Uchida, M. Yosoi, Toshio Motoba, and A. O. Tokiyasu

Subjects
Physics, Particle physics, J-PARC, Hypernucleus, Lambda, Atomic and Molecular Physics, and Optics
Published
2021
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42. Search for the Lightest Double-$\Lambda $ Hypernucleus, ${ _{\varvec{\Lambda }\varvec{\Lambda }}^{\varvec{5}}}$H, at J-PARC

Author

Makoto Uchida, Akane Sakaue, Sho Nagao, A. O. Tokiyasu, Yosuke Taki, Toshiyuki Takahashi, Hiroyuki Fujioka, Yuhei Morino, Toshiyuki Gogami, Emiko Hiyama, S. Ajimura, Tomofumi Nagae, M. Yosoi, Toshio Motoba, and Tomokazu Fukuda

Subjects
Physics, Particle physics, Pion, Nuclear Theory, Bound state, Hyperon, J-PARC, Strangeness, Nuclear Experiment, Lambda, Hypernucleus, Coupling (probability), Atomic and Molecular Physics, and Optics
Abstract

Investigations of double- $$\Lambda $$ hypernuclei, which contain two $$\Lambda $$ hyperons in a nucleus, provide valuable information on baryon–baryon interaction in the strangeness $$-2$$ sector, such as the $$\Lambda $$ – $$\Lambda $$ interaction. Whereas several double- $$\Lambda $$ hypernuclei have been discovered in nuclear-emulsion experiments, an experimental observation of $${}_{\Lambda \Lambda }^{5}$$ H is awaited. It is not only because $$_{\Lambda \Lambda }^{5}$$ H is theoretically expected to be the lightest bound state, but also because $$\Lambda \Lambda $$ – $$\Xi N$$ coupling may play an important role in its structure. On the other hand, the coupling effect may be suppressed in $$_{\Lambda \Lambda }^{6}{\mathrm {He}}$$ .We propose an experiment to investigate $$_{\Lambda \Lambda }^{5}$$ H at J-PARC. $$_{\Lambda \Lambda }^{5}$$ H will be produced by a decay of a $$\Xi $$ hypernucleus, $$_\Xi ^{7}$$ H, which can be produced by the $$^7\mathrm {Li}(K^-,K^+)$$ reaction. The mass of $$_{\Lambda \Lambda }^{5}$$ H will be determined by means of decay pion spectroscopy; it can be calculated from the measured momentum of decay pions, owing to a two-body decay of $$_{\Lambda \Lambda }^{5}$$ H.

Published
2021

43. Profile measurement of circulating electrons in a synchrotron by inserting a carbon wire

Author

Hajime Shimizu, A. O. Tokiyasu, Toshiya Muto, Shigeru Kashiwagi, Kyoichiro Ozawa, Takatsugu Ishikawa, Yuki Obara, Hiroki Kanda, Manabu Miyabe, Hiroyuki Hama, and Fujio Hinode

Subjects
Physics, Nuclear and High Energy Physics, Photon, Meson, 010308 nuclear & particles physics, business.industry, Electron, 01 natural sciences, Synchrotron, law.invention, Momentum, Optics, law, 0103 physical sciences, Radiator (engine cooling), Cathode ray, Physics::Accelerator Physics, 010306 general physics, business, Instrumentation, Intensity (heat transfer)
Abstract

An internal radiator made of a carbon wire is employed to produce bremsstrahlung-photon beams for meson photoproduction experiments from circulating electrons in a synchrotron at the Research Center for Electron Photon Science, Tohoku University. The horizontal electron-beam size at the radiator location is determined from the decay rate of the resultant photon intensity as a function of the distance between the fixed position of the radiator and the centroid of the electron beam. The horizontal beam size at the radiator location is determined to be 0.74 mm with a statical error less than 0.01 mm for 1.3-GeV circulating electrons. The horizontal correlation between the position and momentum direction of the electron beam is also measured. The horizontal size and correlation are well-reproduced by the design values of the parameters of the synchrotron.

Published
2019
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45. Effects of Length of Light Period and Photosynthetic Photon Flux Density in Growth Chamber on Germination and Growth of Eustoma grandiflorum after Low-temperature Wet Treatment of Seeds

Author

Keigo Fukushima, Satoshi Ishikura, Shinji Kajihara, Tanjuro Goto, Naoko Fukuta, and Mina Tokiyasu

Subjects
Horticulture, biology, Germination, Chemistry, Period (gene), Eustoma, General Engineering, General Earth and Planetary Sciences, biology.organism_classification, Photosynthetic photon flux density, General Environmental Science
Published
2019
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47. X-ray spectroscopy evidence of solid-density ultra-relativistic laser plasma in renewable micron-scale cryogenic clusters targets

Author

N. Ryazantsev, S., A. Pikuz, T., A. Pikuz, S., Kaji, T., Tanabe, H., Nakagawa, T., Takafumi, Asai, Kanasaki, M., Oda, K., Yamauchi, T., Jinno, S., Taguchi, T., K. Himeno, Iwasaki, K., Hihara, T., Sakai, K., Minami, T., Abe, Y., Tokiyasu, A., Kohri, H., Kuramitsu, Y., Sakawa, Y., Yasuhiro, Miyasaka, Kotaro, Kondo, Akira, Kon, Akito, Sagisaka, Koichi, Ogura, Pirozhkov, Alexander, Masaki, Kando, Kiminori, Kondo, Tetsuya, Kawachi, Hiromitsu, Kiriyama, Yuji, Fukuda, and Yuuji, Fukuda

Abstract

Recently it was shown that injection of gas preliminary cooled down to cryogenic temperatures is a promising way to produce micron-scale clusters. For example, in hydrogen clusters with the size up to ≈2 μm were produced via a conical nozzle at 25 K, 6 MPa. Micron scale clusters can be also created with another pre-cooled gases, for example Ar or Kr, but for other temperature values. So large clusters diameter value becomes comparable with a waist width of a laser beam produced by the J-KAREN-P laser facility. As a result, an experimental case can occur, when most of the laser energy is absorbed in a single cluster. Such situation can be considered as an interaction of a laser pulse with matter, state of which is close to solid-state. In the presentation plasma X-ray spectra features indicating the described case of high-intensity laser and large-scale-cluster interaction are discussed. They were observed experimentally during irradiation of cryogenic (T = 140 K – 220 K) Ar flows by ultra-intensive (I = 10^22 W/cm^2) femtosecond laser pulses generated by the J-KAREN-P laser. Registered X-ray spectra of produced plasma contains Ar XVIII Ly-α and Ar XVII He-α of comparable intensities. It should be noted that the Ar XVIII Ly-α line has been for the first time observed in laser-matter interaction experiments. It indicates that the density of irradiated matter is high enough to provide a rate of impact ionization process, which is sufficient to create a significant amount of H-like Ar ions. It is a challenge to reach such condition for a pure gas or small clusters. Thus, the observed spectra are considered as an evidence of a large micron cluster existing in the beam waist region., International Conference on High Energy Density Sciences (HEDS2021)

Published
2021

48. Correction to: Search for the Lightest Double-$$\Lambda $$ Hypernucleus, $${ _{\varvec{\Lambda }\varvec{\Lambda }}^{\varvec{5}}}$$H, at J-PARC

Author

Fujioka, Hiroyuki, primary, Ajimura, Shuhei, additional, Fukuda, Tomokazu, additional, Gogami, Toshiyuki, additional, Hiyama, Emiko, additional, Morino, Yuhei, additional, Motoba, Toshio, additional, Nagae, Tomofumi, additional, Nagao, Sho, additional, Sakaue, Akane, additional, Takahashi, Toshiyuki, additional, Taki, Yosuke, additional, Tokiyasu, Atsushi O., additional, Uchida, Makoto, additional, and Yosoi, Masaru, additional

Published
2021
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49. MPV—Parallel Readout Architecture for the VME Data Acquisition System

Author

Baba, H., primary, Ichihara, T., additional, Isobe, T., additional, Ohnishi, T., additional, Yoshida, K., additional, Watanabe, Y., additional, Ota, S., additional, Shimizu, H., additional, Shimoura, S., additional, Takeuchi, S., additional, Nishimura, D., additional, Zenihiro, J., additional, Tokiyasu, A. O., additional, and Yokoyama, R., additional

Published
2021
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50. Search for the Lightest Double-$$\Lambda $$ Hypernucleus, $${ _{\varvec{\Lambda }\varvec{\Lambda }}^{\varvec{5}}}$$H, at J-PARC

Author

Fujioka, Hiroyuki, primary, Ajimura, Shuhei, additional, Fukuda, Tomokazu, additional, Gogami, Toshiyuki, additional, Hiyama, Emiko, additional, Morino, Yuhei, additional, Motoba, Toshio, additional, Nagae, Tomofumi, additional, Nagao, Sho, additional, Sakaue, Akane, additional, Takahashi, Toshiyuki, additional, Taki, Yosuke, additional, Tokiyasu, Atsushi O., additional, Uchida, Makoto, additional, and Yosoi, Masaru, additional

Published
2021
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