Search for $^6_\Lambda$H hypernucleus by the $^6$Li$(\pi^-,K^+)$ reaction at $p_{\pi^-}$ = 1.2 GeV/$c$

  title={Search for \$^6_\Lambda\$H hypernucleus by the \$^6\$Li\$(\pi^-,K^+)\$ reaction at \$p_\{\pi^-\}\$ = 1.2 GeV/\$c\$},
  author={H.Sugimura and M.Agnello and J.K.Ahn and S.Ajimura and Y.Akazawa and N.Amano and K.Aoki and H.C.Bhang and N.Chiga and M.Endo and P.Evtoukhovitch and A.Feliciello and H.Fujioka and T.Fukuda and S.Hasegawa and S.Hayakawa and R.Honda and K.Hosomi and S.H.Hwang and Y.Ichikawa and Y.Igarashi and K.Imai and N.Ishibashi and R.Iwasaki and C.W.Joo and R.Kiuchi and J.K.Lee and J.Y.Lee and K.Matsuda and Y.Matsumoto and K.Matsuoka and K.Miwa and Y.Mizoi and M.Moritsu and T.Nagae and S.Nagamiya and M.Nakagawa and M.Naruki and H.Noumi and R.Ota and B.J.Roy and P.K.Saha and A.Sakaguchi and H.Sako and C.Samanta and V.Samoilov and Y.Sasaki and S.Sato and M.Sekimoto and Y.Shimizu and T.Shiozaki and K.Shirotori and T.Soyama and T.Takahashi and T.N.Takahashi and H.Tamura and K.Tanabe and T.Tanaka and K.Tanida and A.O.Tokiyasu and Z.Tsamalaidze and M.Ukai and T.O.Yamamoto and Y.Yamamoto and S.B.Yang and K.Yoshida},
We have carried out an experiment to search for a neutron-rich hypernucleus, $^6_{\Lambda}$H, by the $^6$Li($\pi^-,K^+$) reaction at $p_{\pi^-}$ =1.2 GeV/$c$. The obtained missing mass spectrum with an estimated energy resolution of 3.2 MeV (FWHM) showed no peak structure corresponding to the $^6_{\Lambda}$H hypernucleus neither below nor above the $^4_{\Lambda}$H$+2n$ particle decay threshold. An upper limit of the production cross section for the bound $^6_{\Lambda}$H hypernucleus was… CONTINUE READING

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