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Tau Identification at the CMS Experiment in LHC Run-2

Choudhury, Somnath (2018) Tau Identification at the CMS Experiment in LHC Run-2. In: PROCEEDINGS OF THE 21ST PARTICLES AND NUCLEI INTERNATIONAL CONFERENCE (PANIC 2017), SEP 01-05, 2017, Beijing, CHINA.

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Official URL: http://dx.doi.org/10.1142/S2010194518600558


Since Run-1 of the LHC, CMS has taken the opportunity to improve further particle reconstruction. A number of improvements were made to the hadronic tau reconstruction and identification algorithms. In particular, the reconstruction of the tau decay products leaving deposits in the electromagnetic calorimeter was improved to better model signal of pi(0) from tau decays. This modification improves energy response and removes the tau footprint from isolation area. In addition to this, improvements were made to discriminators that combine isolation and tau lifetime variables, and the rejection of electrons misidentified as hadronic taus was improved using multivariate techniques. The results of these improvements using 13 TeV data at LHC Run-2 are presented and validation of tau identification using a variety of techniques has been highlighted.

Item Type: Conference Proceedings
Series.: International Journal of Modern Physics-Conference Series
Additional Information: Copyright belongs to WORLD SCIENTIFIC PUBL CO PTE LTD
Keywords: tau lepton;multivariate isolation;identification efficiency;misidentification rate;trigger
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 23 Apr 2019 04:55
Last Modified: 23 Apr 2019 04:55
URI: http://eprints.iisc.ac.in/id/eprint/62523

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