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We study the very recently discovered Theta+ (1540) at SPring-8, at ITEP andat CLAS-Thomas Jefferson Lab. We apply the same RGM techniques that alreadyexplained with success the repulsive hard core of nucleon-nucleon, kaon-nucleonexotic scattering, and the attractive hard core present in pion-nucleon andpion-pion non-exotic scattering. We find that the K-N repulsion excludes theTheta+ as a K-N s-wave pentaquark. We explore the Theta+ as a heptaquark,equivalent to a N+pi+K borromean bound-state, with positive parity and totalisospin I=0. We find that the kaon-nucleon repulsion is cancelled by theattraction existing both in the pion-nucleon and pion-kaon channels. Althoughwe are not yet able to bind the total three body system, we find that theTheta^+ may still be a heptaquark state. We conclude with predictions that canbe tested experimentally.Comment: 5 pages, 5 figures, 2 tables, submitted to Phys. Rev. D, rapid  communicatio

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>Θ</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mn /><mml:mo>(</mml:mo><mml:mn>1540</mml:mn><mml:mo>)</mml:mo><mml:mn /></mml:math>as a heptaquark with the overlap of a pion, a kaon, and a nucleon

Θ+(1540)as a heptaquark with the overlap of a pion, a kaon, and a nucleon