Improving estimates of the number of fake leptons and other mis-reconstructed objects in hadron collider events: BoBs your UNCLEReport as inadecuate


Improving estimates of the number of fake leptons and other mis-reconstructed objects in hadron collider events: BoBs your UNCLE


Improving estimates of the number of fake leptons and other mis-reconstructed objects in hadron collider events: BoBs your UNCLE - Download this document for free, or read online. Document in PDF available to download.

Publication Date: 2014-11-06

Journal Title: Journal of High Energy Physics

Publisher: Springer

Volume: 2014

Issue: 11

Pages: 31

Language: English

Type: Article

Metadata: Show full item record

Citation: Gillam, T. P. S., & Lester, C. G. (2014). Improving estimates of the number of fake leptons and other mis-reconstructed objects in hadron collider events: BoB's your UNCLE. Journal of High Energy Physics, 2014 (11), 31.

Description: This is the final published version. It is available online from Springer in the Journal of High Energy Physics here: http://link.springer.com/article/10.1007/JHEP11(2014)031.

Abstract: We consider current and alternative approaches to setting limits on new physics signals having backgrounds from misidentified objects; for example jets misidentified as leptons, b-jets or photons. Many ATLAS and CMS analyses have used a heuristic “matrix method” for estimating the background contribution from such sources. We demonstrate that the matrix method suffers from statistical shortcomings that can adversely affect its ability to set robust limits. A rigorous alternative method is discussed, and is seen to produce fake rate estimates and limits with better qualities, but is found to be too costly to use. Having investigated the nature of the approximations used to derive the matrix method, we propose a third strategy that is seen to marry the speed of the matrix method to the performance and physicality of the more rigorous approach.

Identifiers:

This record's URL: http://www.repository.cam.ac.uk/handle/1810/246377http://dx.doi.org/10.1007/JHEP11(2014)031

Rights: Attribution 2.0 UK: England & Wales

Licence URL: http://creativecommons.org/licenses/by/2.0/uk/





Author: Gillam, Thomas P. S.Lester, Christopher G.

Source: https://www.repository.cam.ac.uk/handle/1810/246377



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