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Wiki, based on the 2018 Particle Data Group, gives the Higgs boson mass as $125.18 \pm 0.16$ GeV$/c^2$. OK.

However, 2017 ATLAS gives a combined value of $124.98 \pm 0.28$ GeV$/c^2$.

So what is the 2019 latest result, PDG 2018, 2017 ATLAS, or something else? Is it $124.988063...$ GeV?

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  • $\begingroup$ Is it 124.988063...GeV? I’m pretty sure that the Higgs mass has not been measured to one part in a billion. $\endgroup$ – G. Smith Oct 12 at 2:16
  • $\begingroup$ Thanks G. Smith! Good to know. Still, would be interested if any published newer results than 2017 ATLAS... e.g. home.cern/news/press-release/physics/… (but couldn't find an answer) $\endgroup$ – Mr Anderson Oct 12 at 2:32
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    $\begingroup$ There is also the CMS experiment measurement and a combined statistically value should be found in the particle data group tables, which would be the present accepted value. One should not rely on wikipedia. $\endgroup$ – anna v Oct 12 at 4:59
  • $\begingroup$ @anna v Thank you...however, Wiki IS from the 2018 particle data group tables. I have amended my question to make that clear. My question, i.e. what are the very latest results, still stands... $\endgroup$ – Mr Anderson Oct 13 at 10:14
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If you look at the link you gave, the combined higgs mass is given as 125.18 +/-16. Differs from just Atlas. They have combined all possible seen channels and experiments to get at this accuracy.

To see part of the complexity have a look at this talk at CERN. It is not simple.

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  • $\begingroup$ Thanks, good read...still, what I was asking...is there any newer/reputable/multi-channel results than the 2018 PDG re Higgs Boson Mass. I thought there might be, given that 2019 CERN press release. If no, (which is what I think you are saying), fine, 2018 result is it, with update in 2020 I guess. Cheers. $\endgroup$ – Mr Anderson Oct 13 at 10:46
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    $\begingroup$ Yes, it is a long shutdown and they have not come out with new analysis for the Higgs. For some reason the pdg site in the US is not working. I found the mirror site in England works .durpdg.dur.ac.uk/lbl. $\endgroup$ – anna v Oct 13 at 10:59

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