16-21 July 2017
Embassy Suites Buffalo
US/Eastern timezone

B-tagging without tracks in highly boosted TeV Jets using an Artificial Neural Network

19 Jul 2017, 14:00
Embassy Suites Buffalo

Embassy Suites Buffalo

200 Delaware Avenue Buffalo, NY 14202


Todd Brian Huffman (University of Oxford (GB))


The performance of standard tagging algorithms begins to fall in the case of highly boosted B hadrons (γβ=p/m>200). This work builds on our previous study that uses the jump in hit multiplicity among the pixel layers of an ATLAS or CMS-like detector when a B hadron decays within the detector volume. Consequently, tracking is not required.

First, multiple pp interactions within a finite luminous region were found to have little effect. Second, the study has been extended to use the multivariant techniques of an artificial neural network (ANN). After training, the ANN shows significant improvements to the ability to reject light-quark and charm jets; thus increasing the expected significance of the technique.

Primary authors

Todd Brian Huffman (University of Oxford (GB)) Jeffrey Tseng (University of Oxford (GB))

Presentation Materials