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Measurement of the top quark mass using a profile likelihood approach with the lepton + jets final states in proton–proton collisions at $$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$

https://doi.org/10.1140/epjc/s10052-023-12050-4

Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Del Valle, A. Escalante; Hussain, P. S.; Jeitler, M.; et al (October 2023, The European Physical Journal C)

Abstract The mass of the top quark is measured in 36.3$$\,\text {fb}^{-1}$$

{fb}^{- 1}

of LHC proton–proton collision data collected with the CMS detector at$$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$

\sqrt{s} = 13 Te V

. The measurement uses a sample of top quark pair candidate events containing one isolated electron or muon and at least four jets in the final state. For each event, the mass is reconstructed from a kinematic fit of the decay products to a top quark pair hypothesis. A profile likelihood method is applied using up to four observables per event to extract the top quark mass. The top quark mass is measured to be$$171.77\pm 0.37\,\text {Ge}\hspace{-.08em}\text {V} $$

171.77 \pm 0.37 Ge V

. This approach significantly improves the precision over previous measurements.

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