TY  - EJOUR
AU  - Baeza Ballesteros, Jorge
AU  - Hernández, Pilar
AU  - Romero-López, Fernando
TI  - Results on meson-meson scattering at large N<sub>c</sub>
IS  - arXiv:2501.19115
M1  - PUBDB-2025-01100
M1  - arXiv:2501.19115
M1  - DESY-25-018
M1  - MIT-CTP/5834
PY  - 2025
N1  - 11 pages, 5 figures. Talk presented at the 41st International Symposium on Lattice Field Theory (Lattice2024), 28 July - 3 August 2024, Liverpool, UK
AB  - We present results on the large N<sub>\text</sub>c scaling of meson-meson scattering amplitudes. We work in a theory with N<sub>\text</sub>f=4 degenerate quark flavors and run lattice simulations with N<sub>\text</sub>c=3−6 and pion mass M<sub>π</sub> ≈ 590 MeV. We focus on three different scattering channels, two of which have the same quantum numbers as some tetraquark candidates recently found at LHCb. Finite-volume energies are extracted using a large set of operators, containing two-particle operators corresponding to two pions or two vector mesons, and local tetraquark operators. Using Lüscher's quantization condition, we constrain the infinite-volume scattering amplitudes and investigate subleading N<sub>\text</sub>c corrections to the large N<sub>\text</sub>c limit. For one of the channels, we find indications of a virtual bound state at N<sub>\text</sub>c=3, which may be related to one of the aforementioned exotic states.
LB  - PUB:(DE-HGF)25
DO  - DOI:10.3204/PUBDB-2025-01100
UR  - https://bib-pubdb1.desy.de/record/625326
ER  -