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Long-range interactions in double heavy tetraquarks \\(\\bar Q \\bar Q qq\\)
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Paper
Long-range interactions in double heavy tetraquarks \\(\\bar Q \\bar Q qq\\)
2025
Overview
At the large distances compared to the chiral symmetry breaking scale, a four-quark system \\(\\bar Q \\bar Q qq\\) (with \\(Q\\) as heavy and \\(q\\) as light quarks) can be treated as two asymptotic mesons interacting via strong residual forces. The static heavy quark assumption enables using the Born-Oppenheimer approximation, where one can compute the potential between two heavy antiquarks in the presence of two light quarks of finite mass -- a prescription utilized in several lattice QCD studies. To analyse the long-range strong force in a \\(\\bar Q \\bar Q qq\\) system, we study the interaction between two bottom mesons in the heavy quark limit using chiral effective field theory and dispersion theory with unphysical pion mass. We present methods to obtain two-pion-exchange potential between two static heavy mesons at non-physical pion mass and compare our preliminary results with the corresponding lattice QCD potentials.
Publisher
Cornell University Library, arXiv.org
Subject
