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Study of phi mass modification with k$$^{+}$$ k$$^{-}$$ decay in p+A collisions at J-PARC

Sato, Susumu  ; Sako, Hiroyuki   ; Miake, Yasuo* ; Inaba, Motoi*; Chujo, Tatsuya*; Ozawa, Kyoichiro*; Kyan, Shono*; Esumi, Shinichi*; Nonaka, Toshihiro*

We are proposing an experiment to study phi mass modification through k$$^{+}$$ k$$^{-}$$ decay in p + A collisions at J-PARC. We exect to obtain several hundred thousands of phi to k$$^{+}$$ k$$^{-}$$ decays in p+C and p+Cu collisions with 30 GeV proton beams. The phi mass modification is sensitive not only modification but also to the branching ratio due to the small Q value. In this presentation, we discuss the physics of phi in nucleus, the design of the experiment, and the research and development status and plan of the kaon identification detectors.

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