Pentaquark Θ+(1540) in the string model -: art. no. 017502

We consider the Theta(+)(1540) pentaquark in the string model that correctly reproduces the linear Regge trajectories for the case of orbtal excitations of light q (q) over bar mesons and qqq baryons. Assuming (and arguing in favor of) the diquark-antiquark-diquark ([ud](s) over bar [ud]) clustering of this orbitally excited object we found its mass about 290 MeV above the experimental value 1540 MeV. In the model considered this discrepancy could be attributed to the change of the constituent mass of (s) over bar antiquark as compared to that of s quark localized at the string end.