Nov 7 – 11, 2022
Europe/Rome timezone
There is a live webcast for this event.

The bottom quark mass from Higgs measurements

Nov 8, 2022, 12:10 PM
Sala Bianchi (Palazzo della Carovana)

Sala Bianchi

Palazzo della Carovana


Michael Spira (Paul Scherrer Institute (CH))


The measurement of the H->bbbar decay rate by ATLAS and CMS offers an opportunity to test the scale evolution or "running" of the bottom quark mass. With an excellent mass sensitivity, reduced dependence on alpha_s and a clearly identifiable scale, the Higgs decay process is the ideal laboratory to extract a high-scale quark mass. The mass at the scale given by the Higgs boson mass, mb(mH) is determined to be 2.6 +/- 0.3 GeV. Combining this new measurement with the determination of mb(mb) from low-energy data and mb(mZ) from LEP and SLD measurements at the Z-pole, we revisit the scale evolution of the bottom quark mass, finding an unambiguous confirmation of this SM prediction. The result from PRL128 (2021) is updated with the latest results by ATLAS and CMS and projections of the future precision at the HL-LHC and a future Higgs/top/EW factory are presented.

Type of talk Experimental measurements

Primary author

Michael Spira (Paul Scherrer Institute (CH))

Presentation materials