Speaker
Vadim Baru
(Ruhr University Bochum)
Description
It has recently been understood that the emergence of left-hand cuts from long-range interactions creates significant complications in extracting infinite-volume observables from lattice QCD finite-volume spectra:
(i) the famous Lüscher method fails below the left-hand cut and
(ii) the effective range expansion used to extract the low energy parameters has a very limited domain of validity.
We will introduce an alternative approach based on chiral EFT which overcomes both difficulties due to the explicit inclusion of long range forces. Recent application of this approach to extract the properties of the Tcc state at larger than physical pion masses will be discussed.
Primary author
Vadim Baru
(Ruhr University Bochum)
