Double neutral pion photoproduction off the proton with FOREST at ELPH

Q. He; H. Fujimura; H. Fukasawa; R. Hashimoto; Y. Honda; T. Ishikawa; T. Iwata; S. Kaida; J. Kasagi; A. Kawano; S. Kuwasaki; K. Maeda; S. Masumoto; M. Miyabe; F. Miyahara; K. Mochizuki; N. Muramatsu; A. Nakamura; K. Nawa; S. Ogushi; Y. Okada; Y. Onodera; K. Ozawa; Y. Sakamoto; M. Sato; H. Shimizu; H. Sugai; K. Suzuki; Y. Tajima; S. Takahashi; Y. Taniguchi; Y. Tsuchikawa; H. Yamazaki; R. Yamazaki; H. Y. Yoshida

doi:10.1051/epjconf/201610904004

All issues

Volume 109 (2016)

EPJ Web of Conferences, 109 (2016) 04004

Abstract

Open Access

Issue		EPJ Web of Conferences Volume 109, 2016 The 13^th International Symposium on Origin of Matter and Evolution of Galaxies (OMEG2015)


Article Number		04004
Number of page(s)		6
Section		Experimental Nuclear Physics for Astrophysics
DOI		https://doi.org/10.1051/epjconf/201610904004
Published online		12 February 2016

EPJ Web of Conferences 109, 04004 (2016)
https://doi.org/10.1051/epjconf/201610904004

Double neutral pion photoproduction off the proton with FOREST at ELPH

Q. He¹^a, H. Fujimura², H. Fukasawa³, R. Hashimoto¹, Y. Honda¹, T. Ishikawa¹, T. Iwata², S. Kaida¹, J. Kasagi¹, A. Kawano³, S. Kuwasaki¹, K. Maeda⁴, S. Masumoto⁵, M. Miyabe¹, F. Miyahara¹, K. Mochizuki¹, N. Muramatsu¹, A. Nakamura¹, K. Nawa¹, S. Ogushi¹, Y. Okada¹, Y. Onodera¹, K. Ozawa⁶, Y. Sakamoto³, M. Sato¹, H. Shimizu¹, H. Sugai¹, K. Suzuki¹, Y. Tajima², S. Takahashi¹, Y. Taniguchi¹, Y. Tsuchikawa¹, H. Yamazaki¹, R. Yamazaki¹ and H. Y. Yoshida²

¹ Research Center for Electron Photon Science, Tohoku University, Sendai 982-0826, Japan
² Department of Physics, Yamagata University, Yamagata 990-8560, Japan
³ Department of Information Science, Tohoku Gakuin University, Sendai 981-3193, Japan
⁴ Department of Physics, Tohoku University, Sendai 980-8578, Japan
⁵ Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
⁶ Institute of Particle and Nuclear Studies, KEK, Tsukuba 305-0801, Japan

^a e-mail: qhhe@lns.tohoku.ac.jp

Published online: 12 February 2016

Abstract

Total cross section for the double neutral pion photoproduction off the proton is presented in the incident photon energy range of 0.58 to 1.15 GeV. The data were accumulated in the years 2009–2010, recorded by a 4π EM calorimeter at ELPH, named FOREST. The number of recorded events obtained during this period is 1.6×10⁹ for a hydrogen target. Two neutral pions are reconstructed via detecting their decay products, four gammas (2π⁰ → 4γ). Compared to the previous results obtained by other groups, our data are in good agreement with theirs within error bars.

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