Tuesday, May 10, 2011

SUSY..hope you are still there!

Couple of weeks back there were lots of hue and cry among young researchers who might have heard about SUSY but have not worked on it in great details. It's because of the ATLAS and CMS experiment at Large Hadron Collider (LHC), CERN (Geneva) publishing two independent results related to supersymmetry (SUSY) searches in the 7 TeV run of LHC. One of them looked for missing energy+ jet signatures whereas the other looked for lepton+jet signatures, but their conclusion was more or less similar. They ruled out significant amount of parameter space of Constrained Minimal Supersymmetric Standard Model (CMSSM). This is a rather constrained version of MSSM where the number of free parameters are just 5 compared to 124 or so parameters in the MSSM. So obviously the CMSSM has far more predictability and hence getting almost ruled out. Although its really heartbreaking to see such predictable models losing their fight, yet this does not really mean SUSY is not there. We still need more data and scan of other available models to rule out TeV scale SUSY. And even if LHC rule out TeV scale SUSY, it can not say anything about existence of SUSY at even higher energies. But many of the theoretical advantages of SUSY would be lost if we keep pushing SUSY towards higher and higher scales and will be as good as having no SUSY at all. Anyway, hope LHC will soon confirm its presence around the TeV corner. But nevertheless, the ATLAS/CMS result created lots of hype among both experts as well as others. One of our over-curious mate in the department got pumped up so much (may be after reading about it in some newspapers and not in the arxiv papers) that he asked one of our senior prof, what's the point of doing SUSY as LHC has already ruled it out? I don't know what was the professor's reaction at that moment, but I can imagine how shocking such a news (if true) to a person working in particle physics for a long time. Blame it on popular news sites or news papers which put the title of such news in such a way that young kids easily get misled. Anyway, hope many such news (positive I mean) about SUSY would be coming soon from the heart of LHC :)

No comments: