Abstract

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.

Details

Title
Status and future plan of the spectroscopy of pionic atoms
Author
Watanabe, Y N 1 ; Berg, G P A 2 ; Dozono, M 3 ; Fujioka, H 4 ; Fukuda, N 3 ; Furuno, T 4 ; Geissel, H 5 ; Hayano, R S 1 ; Inabe, N 3 ; Itahashi, K 3 ; Itoh, S 1 ; Kameda, D 3 ; Kubo, T 3 ; Matsubara, H 6 ; Michimasa, S 7 ; Miki, K 8 ; Miya, H 7 ; Murakami, Y 1 ; Nakamura, M 3 ; Nakatsuka, N 4 ; Nishi, T 1 ; Noji, S 1 ; Okochi, K 1 ; Ota, S 7 ; Suzuki, H 3 ; Suzuki, K 9 ; Takaki, M 7 ; Takeda, H 3 ; Tanaka, Y K 1 ; Todoroki, K 1 ; Tsukada, K 10 ; Uesaka, T 3 ; Weick, H 5 ; Yamada, H 1 ; Yamakami, H 4 ; Yoshida, K 3 

 The University of Tokyo, 113-0033 Tokyo, Japan 
 JINA and Department of Physics, University of Notre Dame, Indiana, 46556, USA 
 Nishina Center for Accelerator-Based Science, RIKEN, Saitama, 351-0198, Japan 
 Department of Physics, Kyoto University, Kyoto, 606-8502, Japan 
 GSI Helmholtzzentrum fur Schwerionenforschung GmbH, D-64291 Darmstadt, Germany 
 National Institute of Radiological Sciences (NIRS), Chiba 263-8555, Japan 
 Center for Nuclear Study, University of Tokyo, Tokyo, 113-0033, Japan 
 Research Center for Nuclear Physics, Osaka University, 567-0047 Osaka, Japan 
 Stefan-Meyer-Institut fur subatomare Physik, 1090, Vienna, Austria 
10  Department of Physics, Tohoku University, 980-8578, Sendai, Japan 
Publication year
2014
Publication date
Apr 2014
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2576638757
Copyright
© 2014. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.