Speaker
Fred Olness
(Southern Methodist University)
Description
We analyze the properties of the ACOT scheme for heavy quark
production and make use of the MS-bar massless results at NNLO and
N3LO for the structure functions F2 and FL in neutral current
deep-inelastic scattering to estimate the higher order corrections.
For this purpose we decouple the heavy quark mass entering the phase
space from the one entering the dynamics of the short distance cross
section. We show numerically that the phase space mass is generally
more important. Therefore, the dominant heavy quark mass effects at
higher orders can be taken into account using the massless Wilson
coefficients together with an appropriate slow-rescaling prescription
implementing the phase space constraints. Combining the exact ACOT
scheme at NLO with these expressions should provide a good
approximation to the missing full calculation in the ACOT scheme at
NNLO and N3LO.
Primary author
Fred Olness
(Southern Methodist University)
