Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-06-18
Int.J.Mod.Phys. A19 (2004) 3439-3469
Physics
High Energy Physics
High Energy Physics - Phenomenology
Review Commissioned by International Journal of Modern Physics A
Scientific paper
10.1142/S0217751X04019676
Since LEPS collaboration reported the first evidence of $\Theta^+$ pentaquark in early 2003, eleven other experimental groups have confirmed this exotic state while many other groups didn't see any signal. If this state is further established by future high statistical experiments, its discovery shall be one of the most important events in hadron physics for the past three decades. This exotic baryon with such a low mass and so narrow a width imposes a big challenge to hadron theorists. Up to now, there have appeared more than two hundred theoretical papers trying to interpret this charming state. I will review some important theoretical developments on pentaquarks based on my biased personal views.
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