Compact Muon Solenoid
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| CMS-PAS-SMP-18-014 | ||
| Precision measurement of the Z invisible width with the CMS experiment in pp collisions at $\sqrt{s}= $ 13 TeV | ||
| CMS Collaboration | ||
| July 2021 | ||
| Abstract: A direct measurement of the invisible width of the Z boson in proton-proton collisions at a center-of-mass energy of 13 TeV is presented using data recorded by the CMS experiment at the LHC corresponding to an integrated luminosity of 36.3 fb$^{-1}$. The result is extracted from a simultaneous fit to data regions containing predominantly Z boson decay to invisible particles and those dominated by Z boson decay to electron and muon pairs. The invisible width is measured to be 523 $\pm$ 3 (stat) $\pm$ 16 MeV. This result is the first measurement of the Z invisible width at a hadron collider and is the single most precise direct measurement in the world, competitive with the combined direct measurement from the LEP experiments. | ||
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Links:
CDS record (PDF) ;
Physics Briefing ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, PLB 842 (2023) 137563. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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