Nuclear medium effects on the (K)over-bar* meson

作者：Tolos Laura^*; Molina Raquel; Oset Eulogio; Ramos Angels

来源：Nuclear Physics A, 2012, 881: 169-177.

DOI：10.1016/j.nuclphysa.2011.12.011

• (K)over-bar* meson
• Hidden-gauge formalism
• (K)over-bar* spectral function
• Transparency ratio

The (K) over bar* meson in dense matter is analyzed by means of a unitary approach in coupled channels based on the local hidden gauge formalism. The (K) over bar* self-energy and the corresponding (K) over bar* spectral function in the nuclear medium are obtained. We observe that the (K) over bar* develops a width in matter up to five times bigger than in free space. We also estimate the transparency ratio of the gamma A -%26gt; K+K*(-) A%26apos; reaction. This ratio is an excellent tool to detect experimentally modifications of the (K) over bar* meson in dense matter.

• 出版日期2012-5-1