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Transport Meeting

Venue: Institute for Theoretical Physics, Goethe University Frankfurt, Physics Building, PHYS 2.116
Time: Monday, February 26, 2:00 pm (s.t.)
Contact: hees@th.physik.uni-frankfurt.de

Philipp Gubler (RIKEN)

The $\phi$ meson in nuclear matter and the strangeness content of the nucleon

In this seminar, I will give an overview on recent results about the behavior of the $\phi$ meson in nuclear matter. I will particularly discuss the relation between the $\phi$-meson spectral function and the strange-quark condensate. We find a strong correlation between a possible mass shift of the $\phi$-meson in nuclear matter and the strangeness content of the nucleon, which is proportional to the strange $\sigma$ term, $\sigma_{sN}=m_s \langle N|\bar{s}s|N \rangle$. Depending on the value of $\sigma_{sN}$, the $\phi$ meson could moreover receive both a positive or negative mass shift at normal nuclear matter density. Our findings are relevant for the interpretation of the past E325 experiment at KEK and the future E16 experiment to be carried out at the J-PARC facility.

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