NDLI: A search for ϕ meson nucleus bound state using antiproton annihilation on nucleus

Content Provider	Springer Nature Link
Author	Ohnishi, H. Bühler, P. Cargnelli, M. Curceanu, C. Guaraldo, C. Hartmann, O. Hicks, K. Iwasaki, M. Ishiwatari, T. Kienle, P. Marton, J. Muto, R. Naruki, M. Niiyama, M. umi, H. Okada, S. Vidal, A. Romero Sakaguchi, A. Sakuma, F. Sawada, S. Sirghi, D. Sirghi, F. Suzuki, K. Tsukada, K. Doce, O. Vazquez Widmann, E. Yokkaichi, S. Zmeskal, J.
Copyright Year	2012
Abstract	The mass shift of the vector mesons in nuclei is known to be a powerful tool for investigating the mechanism of generating hadron mass from the QCD vacuum. The mechanism is known to be the spontaneous breaking of chiral symmetry. In 2007, KEK-PS E325 experiment reported about 3.4 % mass reduction of the ϕ meson in medium-heavy nuclei (Cu). This result is possibly one of the indications of the partial restoration of chiral symmetry in nuclei, however, unfortunately it is hard to make strong conclusions from the data. One of the ways to conclude the strength of the ϕ meson mass shift in nuclei will be by trying to produce only slowly moving ϕ mesons where the maximum nuclear matter effect can be probed. The observed mass reduction of the ϕ meson in the nucleus can be translated as the existence of an attractive force between ϕ meson and nucleus. Thus, one of the extreme conditions that can be achieved in the laboratory is indeed the formation of a ϕ-nucleus bound state, where the ϕ meson is “trapped” in the nucleus. The purpose of the experiment is to search for a ϕ-nucleus bound state and measure the binding energy of the system. We will demonstrate that a completely background-free missing-mass spectrum can be obtained efficiently by $(\bar{p}, \phi)$ spectroscopy together with K + Λ tagging, using the primary reaction channel $\bar{p} p \rightarrow \phi \phi$ . This paper gives an overview of the physics motivation and the detector concept, and explains the direction of the initial research and development effort.
Starting Page	23
Ending Page	29
Page Count	7
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	213
Issue Number	1-3
e-ISSN	15729540
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-10-04
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Double ϕ meson production ϕ-N bound state Condensed Matter Physics Atomic, Molecular, Optical and Plasma Physics Nuclear Physics, Heavy Ions, Hadrons Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry Condensed Matter Physics

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