Speaker
Giulia Marinelli
(DESY)
Description
We study the extraction of $\alpha_s$ from the $Z$ boson $p_T$ spectrum at low $p_T$ using resummed predictions up to N$^4$LL.
Recently, the ATLAS collaboration presented a new extracted value for $\alpha_s$ which has been somewhat controversial due to its rather small theoretical uncertainties.
We study in detail the various sources of uncertainty, including the perturbative uncertainty, the one related to the nonperturbative model chosen, and the one associated with the parton distribution functions (PDF) considered.
Primary author
Giulia Marinelli
(DESY)
Co-authors
Frank Tackmann
(DESY)
Thomas Cridge
(DESY)
