Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-08-04
Acta Phys.Hung. A22 (2005) 61-68
Physics
High Energy Physics
High Energy Physics - Phenomenology
To appear in Teller Memorial Volume of Acta Physica Hungarica A (Heavy Ion Physics), 2004
Scientific paper
The problem of the long life time of the pentaquark $\Theta^+$ is investigated on the basis of the color molecular dynamics simulation. We find that it takes a long time (typically of 50-100 fm/c) for the initial pentaquark-state to rearrange its color and spatial positions to decay into the nucleon + kaon final state. Structure of the potential surface in the color and position spaces also supports this picture. Pentaquark wanders on the potential surface to find a narrow channel to decay.
Hatsuda Tetsuo
Itagaki Naoyuki
Maezawa Yuu
Maruyama Toshiki
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