See e.g.
TRF: CMS sees SUSY-like trilepton excessesFinally, five days ago, CMS' friends and foes at ATLAS published a preprint about the same question based on a reasonable amount of data, about 2.1/fb:
TRF: Trijet and nonajet excesses
TRF: Multileptons are only "mostly consistent" with SM (CMS)
TRF: Searches for \(R\)-parity violating multileptons at CMS
ATLAS: Search for Anomalous Production of Multilepton Events and \(R\)-Parity-Violating Supersymmetry in \(\sqrt{s}=7\,\,{\rm TeV}\) \(pp\) CollisionsWhat did they find?
They looked at events with at least four leptons (electrons and muons) and some missing transverse momentum. In the inclusive selection, they observed 4 events while the expectation was 1.7 ± 0.9 events; that's roughly a 2.5-sigma excess although one should include the non-Gaussianity of the distribution to get a more accurate figure.
When the Z veto was imposed, they got no events while the expectation was 0.7 ± 0.8 events which is OK within 1-sigma error. So only the veto-free figure is intriguing.
It's plausible that one could combine the number with a CMS figure from one of these three CMS papers:
CMS: Search for Physics Beyond the Standard Model Using Multilepton Signatures in \(pp\) Collisions at \(\sqrt{s}=7 \,\,{\rm TeV}\) (tiny 2010 sample)and get an excess with a local significance above 3.5 sigma. Who knows. At any rate, it's plausible that once CMS and ATLAS analyze their 5/fb of data (which have already been collected), instead of 2.1/fb or so used in all the papers, they could have some pretty tantalizing signals above 3 sigma (per detector) which, in combination, could reach the local significance approaching 5 sigma.
CMS: Searches for Supersymmetry using Multilepton Signatures in \(pp\) Collisions at 7 TeV
CMS: Search for Anomalous Production of Multilepton Events and \(R\)-Parity-Violating Supersymmetry in \(\sqrt{s} = 7\,\,{\rm TeV}\) \(pp\) Collisions
Of course, that assumes that the excesses above are more than just flukes. ;-) At any rate, the multiparticle final states have given us a sufficient number of hints that something interesting could be going on over there. Jester who previously co-authored several SUSY phenomenology papers decided to throw away SUSY because he thinks that She doesn't love him. So he's made a bet $10,000 against your humble correspondent (I will only pay $100 if I lose because I am no fanatic) and wrote a rant claiming that SUSY predicts a Higgs up to 160 GeV and lots of other nonsense. You must agree: this guy has to pay those $10,000, right? He's a villain who behaves to his superbeautiful ex-GF as if She were trash just because he realized he's a f*g, if I use some advanced physics terminology. ;-) The judgment/payment day may even arrive in 2012.
Thanks to Phil Gibbs who reminded me that I wanted to write about the new ATLAS SUSY preprint five days ago. Incidentally, it's more likely than not that the LHC will be restarted at 8 TeV rather than 7 TeV at the beginning of April 2012.
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