Today in Mumbai (India), at the Lepton-Photon 2011 Conference, talks announcing new results from LHC were held. Data taking claimed almost doubling of data since July Conference in Grenoble. The results were striking and somewhat unexpected. In order to have an idea you should read this CERN press release and the general mood of people at CERN on the Guardian. What happened can be summarized in a few words: all the signals in the expected mass range for the Higgs particle just weakened and, as clearly pointed out by Tommaso Dorigo in his blog (see here), the possible signal at around 140 GeV should be dead and buried already. What remains after these announcements is a signal at around 120 GeV that also has lose its grip lowering confidence. For your considerations I would like to show you the main graphs from ATLAS and CMS
Aleandro Nisati, an Italian researcher at INFN and ATLAS Physics Coordinator, is claiming that no signal above 2.1 sigma is seen in the mass range between 110-600 GeV, in his talk. The remain at around 120 GeV is expected to be clarified in the next months with increasing data. My view is that this is already borderline with respect to Standard Model expectations and could prove to be a fluke as well. So, what could one conclude from a scenario like this? Perspectives are open to a lot of new exciting physics. It is important to stress that these results do not exclude at all the existence of Higgs particle but they seem to make its mass even more heavier. This scenario agrees quite well with a view of a strongly coupled Higgs boson as I have already pointed out in several posts and the most recent one. This in turn will entail a proof of existence for supersymmetry (see here).
I think that this situation is the most exciting one for a lot of reasons. We, the theoreticians, should start to take our pencil and paper again and turn back at study while people at CERN keep on performing their excellent work enlightening us.
Marco Frasca (2010). Mass generation and supersymmetry arXiv arXiv: 1007.5275v2