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hep-ph2026
The chromomagnetic moment of a heavy quark with hyperasymptotic precision
Cesar Ayala, Antonio Pineda
We determine the normalization of the leading infrared renormalon of the chromomagnetic moment of a heavy quark. Estimates of higher order coefficients of the perturbative series a…
hep-ph2026
The ultrafine splitting of heavy quarkonium with next-to-next-to-next-to-next-to-leading-order accuracy
Jose M. Escario, Andreas Maier, Clara Peset +1
We compute the hyperfine splitting of P-wave heavy quarkonium states with next-to-next-to-next-to-next-to-leading-order accuracy. The resummation of logarithms with next-to-next-to…