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
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.