26-30 March 2012
University of Bonn
Europe/Berlin timezone

Heavy Quark Production in the ACOT Scheme at NNLO and N3LO

28 Mar 2012, 08:50
Wolfgang Paul Lecture Hall (University of Bonn)

Wolfgang Paul Lecture Hall

University of Bonn

Kreuzbergweg 28, 53115 Bonn, Germany,
Heavy flavours/structure functions Combined: Heavy flavours/structure functions


Fred Olness (Southern Methodist University)


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)

Presentation materials