Proposes a new approach to reduce PDF uncertainty by a factor of two in an LHCb W boson mass measurement with Run 2 data.
Measurement of the forward-backward asymmetry in $Z/\gamma^{\ast} \rightarrow \mu^{+}\mu^{-}$ decays and determination of the effective weak mixing angle
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abstract
The forward-backward charge asymmetry for the process $q\bar{q} \rightarrow Z/\gamma^{\ast} \rightarrow \mu^{+}\mu^{-}$ is measured as a function of the invariant mass of the dimuon system. Measurements are performed using proton proton collision data collected with the LHCb detector at $\sqrt{s} = 7$ and 8\tev, corresponding to integrated luminosities of $1$fb$^{-1}$ and $2$fb$^{-1}$ respectively. Within the Standard Model the results constrain the effective electroweak mixing angle to be $$sin^{2}\theta_{W}^{eff} = 0.23142 \pm 0.00073 \pm 0.00052 \pm 0.00056 $$ where the first uncertainty is statistical, the second systematic and the third theoretical. This result is in agreement with the current world average, and is one of the most precise determinations at hadron colliders to date.
fields
hep-ph 2years
2019 2verdicts
UNVERDICTED 2representative citing papers
Inclusion of forward-backward asymmetry from LHC neutral current Drell-Yan data provides additional sensitivity to parton distribution functions at current and future luminosities in xFitter fits.
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Towards a W boson mass measurement with LHCb
Proposes a new approach to reduce PDF uncertainty by a factor of two in an LHCb W boson mass measurement with Run 2 data.
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Using Forward-Backward Drell-Yan Asymmetry in PDF Determinations
Inclusion of forward-backward asymmetry from LHC neutral current Drell-Yan data provides additional sensitivity to parton distribution functions at current and future luminosities in xFitter fits.