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Feb 15 – 18, 2018
Canada/Eastern timezone

Development of a new B-Physics trigger for the ATLAS Detector at CERN (student talk)

Feb 17, 2018, 11:45 AM


Ms Shreya Saha (McGill University)


A novel B-Physics trigger for the ATLAS detector is being developed to enable lepton universality studies by selecting $B^0\rightarrow K^{*}e^+e^-$ events and complementing the existing $B^0\rightarrow K^{*}\mu^+\mu^-$ trigger. In the Standard Model, lepton universality refers to the fact that the electroweak couplings of the leptons to the gauge bosons is independent of the lepton flavour. A particular sensitive probe for studying lepton universality is by measuring the ratio ($R_{K^{*0}}$) of the branching fractions of $B^0\rightarrow K^{*0}\mu^+\mu^-$ and $B^0\rightarrow K^{*0}e^+e^-$ decay processes. The value of $R_{K^{*0}}$ is expected to be close to unity in the Standard Model. However, recent analyses have shown an intriguing deviation from the expected value of $R_{K^{*0}}$. The development of the $B^0\rightarrow K^{*}e^+e^-$ trigger is critical to the measurement of the ratio. Summary of ongoing work will be presented in the talk.

Primary authors

Dr Heather Russell (McGill University) Ms Shreya Saha (McGill University) Prof. Steven Robertson (McGill University)

Presentation materials