ELFT HÍRADÓ

[Dezso HORVATH <horvath.dezso AT wigner.mta.hu>]

Dear Friends,

The next CMS seminar talk will be given on 3rd April, 
11:00 at Wigner RCP (KFKI, B2, Media room) by

Andrew Lowe (Wigner RCP)

"Quark/gluon jet discrimination: a reproducible analysis 
using R"

ABSTRACT:

The power to discriminate between light-quark jets and gluon jets
would have a huge impact on many searches for new physics at CERN and
beyond. This talk will present a walk-through of the development of a
prototype machine learning classifier for differentiating between
quark and gluon jets at experiments like those at the Large Hadron
Collider at CERN. A new fast feature selection method that combines
information theory and graph analytics will be outlined. This method
has found new variables that promise significant improvements in
discrimination power. The prototype jet tagger is simple,
interpretable, parsimonious, and computationally extremely cheap, and
therefore might be suitable for use in trigger systems for real-time
data processing. Nested stratified k-fold cross validation was used to
generate robust estimates of model performance. The data analysis was
performed entirely in the R statistical programming language, and is
fully reproducible. The entire analysis workflow is data-driven,
automated and runs on very modest hardware with no human intervention.
New data visualisation techniques will also be introduced.

As usual, the talk will be posted at the Indico category of 
our meetings: https://indico.cern.ch/category/8677/ and 
broadcasted via Vidyo in the videoconferencing room 
"Budapest-Debrecen_meetings" (ext. 10593817). Everybody is 
welcome to join.

Cheers: Dezso