出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present an effective field theory suitable to describe a non-relativistic particle-antiparticle pair
of heavy scalars based on the gauge group SU(3). Its formulation is analogous to that of “velocity
NRQCD" (vNRQCD), a non-relativistic effective theory for heavy quark pairs. The matching
conditions with scalar QCD and the renormalization group evolution of the effective theory are
discussed. The non-relativistic framework proposed here suffices to compute scalar-antiscalar
bound state energies at next-to-next-to-leading-logarithmic (NNLL) order and next-to-leadinglogarithmic
(NLL) threshold production of squarks in e+e− and gg collisions, in particular of the
lighter scalar top quark at a future Linear Collider.
