R-K anomalies and simplified limits on Z' models at the LHC
Open Access Publications from the University of California

## R-K anomalies and simplified limits on Z' models at the LHC

• Author(s): Chivukula, R Sekhar
• Isaacson, Joshua
• Mohan, Kirtimaan A
• Sengupta, Dipan
• Simmons, Elizabeth H
• et al.

## Published Web Location

https://doi.org/10.1103/PhysRevD.96.075012
Abstract

The LHCb collaboration has recently reported a 2.5 $\sigma$ discrepancy with respect to the predicted value in a test of lepton universality in the ratio $R_{K^*}= \hbox{BR}(B \to K^* \mu^+ \mu^-) / \hbox{BR}(B \to K^* e^+ e^-)$. Coupled with an earlier observation of a similar anomaly in $R_{K}$, this has generated significant excitement. A number of new physics scenarios have been proposed to explain the anomaly. In this work we consider simplified limits on $Z'$ models from ATLAS and CMS searches for new resonances in dilepton and dijet modes, and we use the simplified limits variable $\zeta$ to correlate the results of the resonance and B-decay experiments. By examining minimal $Z'$ models that can accomodate the observed LHCb results, we show that the high-mass resonance search results are begining to be sensitive to these models and that future results will be more informative.

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