Takayasu Sekihara

Identifying multiquark hadrons from heavy ion collisions.

Identifying hadronic molecular states and/or hadrons with multiquark components either with or without exotic quantum numbers is a long-standing challenge in hadronic physics. We suggest that studying the production of these hadrons in relativistic heavy ion collisions offers a promising resolution to this problem as yields of exotic hadrons are expected to be strongly affected by their structures. Using the coalescence model for hadron production, we find that, compared to the case of a nonexotic hadron with normal quark numbers, the yield of an exotic hadron is typically an order of magnitude smaller when it is a compact multiquark state and a factor of 2 or more larger when it is a loosely bound hadronic molecule. We further find that some of the newly proposed heavy exotic states could be produced and realistically measured in these experiments.

Kaonic production of Lambda(1405) off deuteron target in chiral dynamics

The K--induced production of

Studying Exotic Hadrons in Heavy Ion Collisions

\Lambda

Weak decays of heavy hadrons into dynamically generated resonances

(1405) is investigated in K-d

Electromagnetic mean squared radii of Λ(1405) in chiral dynamics

\rightarrow

Size measurement of dynamically generated hadronic resonances with finite boxes

\pi

K\bar K

\Sigma

compositeness of the

n reactions based on coupled-channels chiral dynamics, in order to discuss the resonance position of the