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Properties of the observed Higgs-like resonance …

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… decaying into two photons

The CMS Collaboration

Exclusion limits on σ x BR for a second Higgs-like state produced with gluon-fusion only (left) or vector-boson-fusion and vector-boson-associated production only (right) taking the observed state at 125 GeV as part of the background.

Exclusion limits on σ x BR for a second Higgs-like state produced with gluon-fusion
only (left) or vector-boson-fusion and vector-boson-associated production only (right) taking
the observed state at 125 GeV as part of the background.

Analyses are reported on properties of the recently discovered Higgs-like resonance around 125 GeV in its decay to two photons.
The analyses are performed using the 2011 (2012) dataset recorded by the CMS experiment at the LHC from pp collisions at a centre-of-mass energy of 7 (8) TeV.
The dataset corresponds to an integrated luminosity of 5.1 (19.6) fb-1.
The spin analysis is evaluated on the 2012 dataset alone.
An upper limit on the natural width of the observed resonance is found to be 6.9 GeV at 95% confidence level.
A search has been performed for second Higgs-like states in the range 110 < mH < 150 GeV. Spin hypothesis tests have been performed comparing the Standard Model Higgs with a spin-2 graviton-like model with minimal couplings.
The current data cannot exclude this particular model of spin-2 whilst the data are compatible with the Standard Model Higgs at the 1σ level.
Read more at http://cds.cern.ch/record/1558930/files/HIG-13-016-pas.pdf

Written by physicsgg

July 3, 2013 at 11:21 pm

Posted in High Energy Physics

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