Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

Quark jet fraction in multi-jet final states and quark gluon discrimination

Jul 6, 2018, 3:25 PM
15m
101 (COEX, Seoul)

101

COEX, Seoul

Parallel Strong Interactions and Hadron Physics Strong Interactions and Hadron Physics

Speaker

Dr Yasuhito Sakaki (KAIST)

Description

We calculate quark and gluon jet fraction in multi-jet final states at the LHC, which is based on perturbative QCD at next-to-double logarithmic accuracy. We find a measurable scaling pattern of the fraction. This is related to a performance of new physics searches using quark-gluon jet discrimination in multi-jet final states, and would be useful for more understanding of QCD and tuning of Monte-Carlo generators. We also introduce a variable which is related to jet flavors in multi-jet final states, and propose a data-driven method using the variable to reduce systematic uncertainties of the analysis. We show how the background rejection using the method increase for signals which produce many quark jets.

Primary author

Presentation materials