Effective field theory for the nucleon-quarkonium interaction

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Data

2018-07-23

Autores

Tarrus Castella, Jaume
Krein, Gastao [UNESP]

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Editor

Amer Physical Soc

Resumo

We develop an effective field theory approach for the S-wave quarkonium-nucleon system. We adopt a natural power counting equivalent to Weinberg's power counting in nucleon-nucleon effective field theories and compute the quarkonium-nucleon potential, scattering length and effective range up to O(m(pi)(3)/Lambda(3)(chi)) accuracy, including the full light-quark mass dependence. We compare our results with lattice QCD studies of quarkonium-nucleon system, obtain an estimation of the leading order quarkonium-nucleon contact term and determine the J/psi and eta(c) chromopolarizabilities.

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Physical Review D. College Pk: Amer Physical Soc, v. 98, n. 1, 10 p., 2018.