Strong coupling constant at NNLO from DIS data

TL;DR

This paper presents a precise determination of the strong coupling constant at NNLO using deep inelastic scattering data, emphasizing the role of higher twist contributions in the analysis.

Contribution

The study provides a new NNLO analysis of DIS data focusing on non-singlet structure functions and higher twist effects, resulting in an improved alpha_s value.

Findings

alpha_s(MZ2) = 0.1167 ± 0.0022

High statistics DIS data analyzed with emphasis on higher twist contributions

Consistent results across multiple experimental datasets

Abstract

We discuss the results of our recent analysis [1] of deep inelastic scattering data on F2 structure function in the non-singlet approximation with next-to-next-to-leading-order accuracy. The study of high statistics deep inelastic scattering data provided by BCDMS, SLAC, NMC and BFP collaborations was performed with a special emphasis placed on the higher twist contributions. For the coupling constant the following value alfa_s(MZ2) = 0.1167 +- 0.0022 (total exp. error) was found.