DIS Event Shape at N$^3$LL

30 Apr 2015, 10:45
25m
FORUM ()

FORUM

WG4 QCD and Hadronic Final States WG4 QCD and Hadronic Final States

Speaker

Daekyoung Kang (LANL)

Description

Event shapes provide a key method of measuring jets in DIS. This was done successfully by H1 and ZEUS and compared with theoretical calculations with next-to-leading-logarithmic (NLL) resummation. We will present a high precision calculation of a event shape called DIS thrust, with next-to-next-to-next-to-leading-logarithmic resummation and a rigorous treatment of hadronization corrections. Perturbative resummation uncertainties in the cross section are reduced to the 2% level for a significant region of the HERA phase space in $x$ and $Q$, thus allowing for new accurate measurements of $\alpha_s(m_Z)$.

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