July 28, 2020 to August 6, 2020
virtual conference
Europe/Prague timezone

Multi-Differential and Unbinned Measurements of Hadronic Event Shapes in e+e- Collisions at sqrt(s)=91 GeV from ALEPH Open Data

Jul 30, 2020, 1:05 PM
virtual conference

virtual conference

Talk 06. Strong Interactions and Hadron Physics Strong Interactions and Hadron Physics


Anthony Badea (Harvard University (US))


First results are presented on the use of a new machine-learning based unfolding technique, OmniFold, applied to archival hadronic e+e- collisions using 730 pb^-1 of data collected at 91 GeV with the ALEPH detector at LEP. With the archived data and unfolding procedure, multiple classic hadronic event-shape variables are measured in a fully unbinned and multi-differential manner. Of particular interest, the differential distribution of log one minus thrust is presented and is expected to be helpful for extracting alpha_s via a fit to precision QCD calculations. The analysis is accompanied by a public release of the archived data set and the unfolding results, so that users may make their own versions of plots, either with different binning or with different combinations of observables in a multi-differential distribution. The details of this release are also presented.

Primary authors

Patrick Komiske (Massachusetts Institute of Technology) Eric Metodiev (Massachusetts Institute of Technology) Jesse Thaler (MIT) Yen-Jie Lee (Massachusetts Institute of Technology) Austin Alan Baty (Rice University (US)) Christopher Mcginn (University of Colorado, Boulder) Anthony Badea (Harvard University (US))

Presentation materials