Here is just a few fleeting remarks.
- There was a significant chance to catch him yet the bastard escaped once again. However it's becoming increasingly clear that this year we will learn whether the Standard Model Higgs exists or not.
- CMS excludes the Standard Model Higgs in the 149-206 GeV and 300-440 GeV windows (plus a few peeping holes here and there), while ATLAS excludes the 155-190 GeV and 295-450 GeV windows. The low mass exclusion is dominated by the search of the H→WW→2l2ν final state, while the high mass one is dominated by H→ZZ after combining different Z decay channels.
- The exclusion range in the low mass region is smaller than expected. Indeed, there are hints of Higgs-like events in the mass range 130-140 GeV. This is nicely visualized in a plot from the ATLAS talk. The excess in the combined plot is driven by a broad excess WW → 2l+MET events. In certain mass regions the excess is amplified by γγ and ZZ→4lepton excesses, and reaches almost 3 sigma significance. CMS also has a 3-sigmish excess in that same region. This could be a fluke, a mismodeled background, or a first glimpse of the real thing. If the latter is true, we may learn it very soon!
- We're looking forward to the ATLAS/CMS combination which should be ready for the next big conference: Lepton-Photon in Mumbai. Most of the high-mass region, up to almost 500 GeV, should be excluded by the combination, and it's not impossible that the low-mass Higgs signal will pop above the 3 sigma surface...
- Both ATLAS and CMS presented their searches in the ZZ→4l channel. Yesterday CDF tried to launch its own firework - a statistically large excess of 4 events with two Z bosons decaying to 2 leptons each near the ZZ invariant mass of around 330 GeV. However that firework fizzled out, as none of the LHC experiments sees any ZZ → 4l excess in that mass region. Given that, there is no way the CDF result can be due to a Higgs or any other new particle; it's either a bad fluke or mismodeled background.
- We can officially announce that Tevatron is out of the Higgs business. Both ATLAS and CMS on its own have much more powerful exclusion limits than the combined Tevatron exclusion from last summer. LHC should collect 3-5 times more luminosity by the end of the year, which will allow them to beat Tevatron's sensitivity also in the mass region near 115 GeV. Higgs hunting has moved to Geneva, for good...
On viXra log Phil is doing a great job of keeping us updated in real time on what is going on at EPS; see this post for a royal collection of Higgs plots. Matt Strassler is blogging live from Grenoble (Et tu, Brute?). See also Tommaso's comments on CMS searches. Tomorrow more excitement guaranteed :-)