Importance of Mixing for Exotic Baryons

Abstract

Exotic antidecuplet baryons are predicted to be not only surprisingly light but also very narrow. First we explain how small decay width arises in the quark soliton model. Next, we study possible mixing of exotic antidecuplet with Roper octet and discuss its phenomenological consequences.

Comments: 7 pages, 2 figures, presented at the workshop "Excited QCD 2010", Jan.31 - Feb.6, 2010, Stara Lesna, Slovakia. v3 replaces unsuccesful upload of v2. Referencing has been changed and some statements have been made more precise.