Speaker
Nate Grieser
(University of Cincinnati (US))
Description
The measurement of the $W$ helicity states provides a fundamental probe at understanding the production mechanisms of $W$ bosons at the LHC. $W$ boson helicity states have shown a strong dependency on $|y_{W}|$, with increasingly left-handed states expected with forward production. The LHCb detector provides a unique kinematic coverage, with lepton acceptance of $2 < \eta < 5$, in which an unparalleled measurement of $W$ helicity states can be measured. Using the 2D distribution of lepton kinematics, $p_{T}^{\ell}$ and $\eta^{\ell}$, a template fit can be made to extract the helicity fractions as a function of $y_{W}$ without needing to reconstruct the $W$ boson kinematics directly.
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Primary author
Nate Grieser
(University of Cincinnati (US))