Higgs Update from D0 and CDF

At Moriond earlier in March D0 showed us this confidence level plot with their first exclusions.


This week they will give us this update (Thanks to Walter for the pointer)

The small amount of additional data helps to extend the exclusion range, but we will need to see a combination with CDF to get the best limits. In March it looked like this

Update: Tevatron Higgs results for individual channels were presented in four talks this afternoon (21st july 2011)

Tomorrow we will see the channels combined for each experiment and in the plenary session we hope to see a new fully combined result for the Tevatron.

Second Update: Fermilab has now made a press release to say that they have shown that the Higgs must lie between 114 Gev and 137 GeV. This just means that they have extended their exclusion zone by about 20 GeV either side and that is not surprising. Their claim depends on the indirect exclusion above 185 GeV due to precision measurements, however this is only true on the condition of some fairly weak assumptions about physics at higher energies. In fact anything outside the standard model could invalidate this analysis.

The funniest thing that could happen now would be for CMS and ATLAS to find a signal for the Higgs at 200 GeV. See also TRF


9 Responses to Higgs Update from D0 and CDF

  1. Kea says:

    Hah, beat you …

  2. Luboš Motl says:

    The final result doesn’t look new to me, or different from any previous ones. It’s been quite some time when a team at the Tevatron claimed to exclude the interval 160-170 GeV or so (and I think a larger one) as well as did their own exclusion below 109 GeV or so.

    • Philip Gibbs says:

      The last plot is not new, so there are no new limits yet. We just have an improvement on the D0 alone result.

  3. Maybe the photon indeed eats the remaining Higgs component as I have been suggesting repeatedly. This in TGD Universe where gauge bosons and Higgs both transform like 3+1 under SU(2). The mechanism is much more general and applies to all spins assignable to partonic 2-surfaces (gluons, super-partners etc…).

    In case of spin one particles this conclusion is more or less forced by extremely simple kinematical argument if one accepts that particles are bound states of massless primary fermions with standard model quantum numbers and assignable to the throats of wormhole contacts.

    This representation makes also the application of twistor approach possible and brings in infrared cutoff from the massivation of the physical particles.

  4. Philip Gibbs says:

    The slides for Wjj are up for both CDF and D0. They still disagree. No concessions made. CDF mention some differences between the analysis, in particular D0 do some morphing to remove systematic errors. There is a task force to compare results step by step to uncover the reason for the disagreement

  5. Luboš Motl says:

    Have you seen the paper on the ZZ channel? It’s amazing, see my blog. Clicking my name should do it.

    There are 4 events compatible with a 327 GeV resonance – similar to a massive RS graviton – but only in the 4-charged-lepton channel. The probability of such high-energy 4 events above 300 GeV is 0.01% even if I ignore the fact that the mass of all these events is almost equal.

    Moreover, there have been previous signals or hints at 325 GeV.

  6. […] creo que es una predicción teórica combinada con datos experimentales, pero Philip Gibss cree que se refiere al nuevo límite de exclusión de masa combinado del Tevatrón (DZero+CDF) que […]

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