Strange Quark as a probe for new physics in the Higgs Sector

Thursday 24 Sept 2020, 12:00 → 14:00 America/Los_Angeles

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Intro:

• Add more emphasis on a H+- --> cs study 
• We need to get in touch with theorist to see what would be a good benchmark model to study this

Physics Overview:

• Agreed we need PID at least at 10GeV to avoid being swamped by fragmentation tracks. If we identify k/pi below that threshold there is no guarantee we are tagging the original quarks
• Most of the discrimination power lives in the x=momentum of the tracks over the jet energy
• Good handle comes from the fact that a strange-quark jets contain a higher ratio of neutral kaon energy to neutral pion energy than down-quark jets (this info was already used in arxiv.2003.09517v1)
• Discussed differences in strange fraction predictions in various generators (this can bias results)

Experience with Tutorial

• The ILC example is easy to follow, but does not allow to reproduce a full analysis chain

 

Action Items:

Try to look into the truth info of an e+e- MC sample (whatever detector scenario makes our life easier for now).

This will help us figure out what information can be used for instance to train a dedicated NN and what could be improved by changing detector layout (we would emulated this with truth level assumptions for now).

In the meanwhile, an additional ILC tutorial was announced https://indico.fnal.gov/event/45721/overview which seems to match our needs of understanding how to do an analysis in one of the future scenario detectors.

 

12:00 → 12:10 Introduction

Speaker: Valentina Cairo (SLAC)

SNOWMASS21-EF1_EF2-IF3_IF0_Valentina_Maria_Martina_Cairo-047.pdf

StrangeTagging_VMMCAIRO_24Sept2020.pdf

12:20 → 12:50 Physics Overview

1. SLD s-tag performance and implications
2. Comments on detector for strange PID
3. Flavor violating search such as H->bs, where SLD Z->bs search provides a good starting point.

Speaker: Prof. Dong Su (SLAC)

s-tag-SLD.pdf

12:55 → 13:15 Experience with Snowmass Tutorials

Speaker: Matthew Joseph Basso (University of Toronto)

200923_Basso_Strange-Tagging-Meeting_ILC-Tutorial.pdf