26–29 Oct 2021
Fully online format
Asia/Tokyo timezone

The bottom quark mass and the Higgs boson

27 Oct 2021, 17:06
20m
Room #6 (Zoom Meeting ID: 819 7353 2455)

Room #6

Zoom Meeting ID: 819 7353 2455

Oral presentation using Zoom Session G: Top / Heavy flavour / QCD G: Top / Heavy flavour / QCD

Speaker

Javier Aparisi

Description

We present a new measurement of the bottom quark mass based on the determination of Higgs decay rates to bottom quarks. The current measurements by ATLAS and CMS yield a value for the bottom quark at the scale of the Higgs boson mass mb(mH) = 2.6 GeV, with an uncertainty of less than 15%. The theory uncertainty has been investigated in detail and is found to be a fraction of the current experimental uncertainty. The prospects for this measurement at the ILC are excellent, with the statistical uncertainty reaching several tens of MeV. Confronting this determination at high scale with the PDG world average for mb(mb) based on low-energy measurement and the measurement of mb(mZ) at LEP and using SLC data, we find strong evidence for the scale evolution of the bottom quark, as predicted by the renormalization group equations in QCD.

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Primary authors

Javier Aparisi Marcel Vos (IFIC (UVEG/CSIC) Valencia)

Presentation materials