TIFPA collaborators publish Cover Article on W boson mass in Science Journal

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Apr 20, 2022/ Off Comments / in Announcement / by
On April 7th 2022, more than ten years after the Tevatron shut-down, the CDFII Collaboration published in the Science journal a new precise measurement of the W boson mass performed using all the 8.8 inverse femtobarns of integrated luminosity collected in proton-antiproton collisions at a 1.96 TeV center-of-mass energy with the CDF II detector at Fermilab: "High-precision measurement of the W boson mass with the CDF II detector" Volume: 376, Issue: 6589, Pages: 170-176, DOI: 10.1126/science.abk1781 .

This new measurement shows a 7 sigma tension from the W mass prediction evaluated SM prediction with the Higgs boson mass measured at the LHC used as input. The relevance of this result gained the Science journal cover.

The presentation of this measurement can be found here.

Here there is a theoretical overview of the measurement.

This measurement is the result of a strong INFN support and contains also a Trento contribution because two members of the collaboration, Silvia Amerio and Benedetto Di Ruzza worked in Trento and at TIFPA-INFN for a long time.

Silvia Amerio gained the Ph.D. in Physics at the Trento University in 2005 defending the thesis "Study of ttbar production in Tau+jets channel at CDFII using neural networks" and then had the resposibilities of the CDFII Gigafitter Trigger Upgrade at the Fermilab Laboratory and the INFN "Data preservation Project" that allowed to process the CDF data years after the end of data tacking.

Benedetto Di Ruzza, which worked at TIFPA-INFN from 2018 up to 2021, joined the CDFII collaboration in 2004, in 2009 defended a thesis entitled "Measurement of the Branching Ratio of the charmless decay Bs → φφ at CDFII" and from 2009 to 2011 was co-head of the CDFII silicon detector at Fermilab. From 2020 up to 2022 was member of the CDFII committee that made the last review of the W mass measurement.