Status and future plan of the spectroscopy of pionic atoms

Y. N. Watanabe, G. P.A. Berg, M. Dozono, H. Fujioka, N. Fukuda, T. Furuno, H. Geissel, R. S. Hayano, N. Inabe, K. Itahashi, S. Itoh, D. Kameda, T. Kubo, H. Matsubara, S. Michimasa, K. Miki, H. Miya, Y. Murakami, M. Nakamura, N. NakatsukaT. Nishi, S. Noji, K. Okochi, S. Ota, H. Suzuki, K. Suzuki, M. Takaki, H. Takeda, Y. K. Tanaka, K. Todoroki, K. Tsukada, T. Uesaka, H. Weick, H. Yamada, H. Yamakami, K. Yoshida

Research output: Contribution to journalConference articlepeer-review


The spectroscopy of deeply bound pionic atoms provides a way to understand the restoration of chiral symmetry breaking at finite density. We have been performing a series of experiments of missing-mass spectroscopy of the (d, 3He) reaction at RIBF to investigate pionic atoms of several Sn isotopes. As a first step, we conducted a pilot experiment to measure deeply bound pionic states of 121Sn and successfully observed the deeply bound pionic states. In addition to the experiment at RIBF, we are planning the spectroscopy of deeply bound pionic atoms in inverse kinematics and conducted a feasible study by simulations. We showed that by using a deuterium gaseous active target TPC and silicon detectors, the Q-value resolution is about 500 keV (FWHM) and the yield of the pionic 1s state is 20 counts/day, indicating the experiment is feasible.

Original languageEnglish
Article number012037
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2014
Externally publishedYes
EventFAIR NExt Generation of ScientistS 2013, FAIRNESS 2013 - Berlin, Germany
Duration: 16-09-201321-09-2013

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


Dive into the research topics of 'Status and future plan of the spectroscopy of pionic atoms'. Together they form a unique fingerprint.

Cite this