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arXiv · 1609.00079

Search for Tetraneutron by Pion Double Charge Exchange Reaction at J-PARC

Hiroyuki Fujioka·Tomokazu Fukuda·Toru Harada·Emiko Hiyama·Kenta Itahashi·Shunsuke Kanatsuki·Tomofumi Nagae·Takuya Nanamura·Takahiro Nishi
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Abstract

Tetraneutron ($^4n$) has come back in the limelight, because of recent observation of a candidate resonant state at RIBF. We propose to investigate the pion double charge exchange (DCX) reaction, i.e. $^4\mathrm{He}({\pi}^- , {\pi}^+)$, as an alternative way to populate tetraneutron. An intense ${\pi}^-$ beam with the kinetic energy of ~850 MeV, much higher than that in past experiments at LAMPF and TRIUMF, will open up a possibility to improve the experimental sensitivity of the formation cross section, which will be much smaller than hitherto known DCX cross sections such as $^9\mathrm{Be}({\pi}^-, {\pi}^+)^9\mathrm{He}\ (g.s.)$.

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Hiroyuki Fujioka, Tomokazu Fukuda, Toru Harada, Emiko Hiyama, Kenta Itahashi, Shunsuke Kanatsuki, Tomofumi Nagae, Takuya Nanamura, Takahiro Nishi. 2016-09-01. Search for Tetraneutron by Pion Double Charge Exchange Reaction at J-PARC. https://doi.org/10.7566/jpscp.13.020058

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