I c N interaction in chiral effective field theory

We adopt the chiral effective field theory to calculate the ςcN interaction to the next-to-leading order. We consider the contact interactions, one-pion-exchange contributions, two-pion-exchange diagrams, and renormalization effects of the vertices, masses, and wave functions. With the pion-mass-dependent expression, we fit the ςcN interaction from the HAL QCD calculation with mπ≈410 MeV and mπ≈570 MeV, and then extrapolate it to the physical pion mass. The S13(I=1/2)ςcN interaction is weakly attractive but no bound solution is found. We also propose a quark model to estimate the leading order ςcN contact interaction with the NN interaction as input. This approach combining the quark model and the chiral effective field theory predicts a very attractive interaction in the S01(I=3/2)ςcN channel and a two-body bound state. © 2020 American Physical Society.