Abstract
We study the LHC sensitivity to a $W'$ produced via bottom and charm quarks and decaying to $\tau$ flavor leptons in the mass range 200-1000 GeV. We show that the extra $b$ quarks necessitated by the production mechanism can improve the background rejection compared to an inclusive analysis relying solely on $\tau$-tagging and $E_{T}^{\text{miss}}$. We present prospective limits on the couplings and compare them to the best fit to the $R(D^{(\ast)})$ anomalies in $B$ meson decays.
Highlights
The BABAR [1,2], Belle [3,4,5,6], and LHCb [7] collaborations have measured the semileptonic decays of B mesons to D and DÃ and found a sizable discrepancy from the standard model (SM) value
Reported B anomalies by BABAR, Belle and LHCb can be explained by invoking new W0 gauge bosons which couple preferentially to some of the second- and third-generation fermions
We have studied the LHC current and future reach for a simplified W0 model that couples only to bottom quarks, charm quarks, and τ-flavor leptons which is responsible for an enhanced charged current b → cτν that explains the RðDÞ and RðDÃÞ excesses
Summary
The BABAR [1,2], Belle [3,4,5,6], and LHCb [7] collaborations have measured the semileptonic decays of B mesons to D and DÃ and found a sizable discrepancy from the standard model (SM) value. The discrepancy suggests lepton flavor universality violation and has prompted many works to explain the anomaly in the context of new physics models [9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71].
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