3 ms·
The constraints on the signal are: decays into 2 photons, so must be a boson, integer spin, probably 0, 1 or 2 both signals are 45Gev wide and look like th
by deepnet 11y ago
The constraints on the signal are:
decays into 2 photons, so must be a boson, integer spin, probably 0, 1 or 2
both signals are 45Gev wide and look like the Higgs signal.
ATLAS has a 1.6TeV bump at 2.5 Sigma, potentially a resonance.
ATLAS has 747 GeV at 3.6 Sigma, CMS 766 GeV at 2.6 Sigma - combines to 4 Sigma although the Look Elsewhere Effect is disputed.
ATLAS run1 at 8TeV did not see the signal.
ATLAS has a 2.2 sigma for the 2 TeV excess that CMS saw in Run1, potentially indicating the 750GeV is a composite particle.
4 Sigma diPhoton excesses have turned out to be random fluctuations before.
http://resonaances.blogspot.fr/2015/12/a-new-boson-at-750-gev.html http://resonaances.blogspot.fr/2015/12/a-new-boson-at-750-ge...
http://motls.blogspot.co.uk/2015/12/first-batch-of-9-pheno-papers-on-new.html http://motls.blogspot.co.uk/2015/12/first-batch-of-9-pheno-p...
http://www.math.columbia.edu/~woit/wordpress/?p=8174 http://www.math.columbia.edu/~woit/wordpress/?p=8174
- qrendel 11y ago> integer spin, probably 0, 1 or 2 So really 0 or 1. If it had spin 2 that would make it a graviton, which seems... unlikely, to say the least.
- deleted 11y ago[deleted]
- panic 11y agoThis article: http://motls.blogspot.co.uk/2015/12/first-batch-of-9-pheno-papers-on-new.html http://motls.blogspot.co.uk/2015/12/first-batch-of-9-pheno-p... also mentions that spin 1 is disallowed by the Landau-Yang Theorem. So it's most likely spin 0.
- qrendel 11y agoIt seems this theorem only applies to massive spin 1 particles, though: https://physics.stackexchange.com/questions/38427/proof-of-yangs-theorem https://physics.stackexchange.com/questions/38427/proof-of-y...