Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 9, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP09(2012)071
Keywords
Higgs Physics; Beyond Standard Model; Standard Model
Categories
Funding
- London Centre for Terauniverse Studies (LCTS)
- European Research Council [267352]
- Korea Foundation for International Cooperation of Science & Technology (KICOS)
- National Research Foundation of Korea [2011-0005226]
- National Research Foundation of Korea [2010-0011034] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Science and Technology Facilities Council [ST/J002798/1] Funding Source: researchfish
- STFC [ST/J002798/1] Funding Source: UKRI
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The Higgs boson is predicted to have spin zero. The ATLAS and CMS experiments have recently reported of an excess of events with mass similar to 125 GeV that has some of the characteristics expected for a Higgs boson. We address the questions whether there is already any evidence that this excess has spin zero, and how this possibility could be confirmed in the near future The excess observed in the gamma gamma final state could riot have spin one, leaving zero and two as open possibilities. We review the angular distribution of gamma gamma pairs from the decays of a graviton-like spin-two boson produced in gluon-gluon collisions, which is well-defined and distinct from the spin-zero case. We also calculate the distributions for lepton pairs that would be produced in the WW* decays of a spin-two boson, which are very different from those in Higgs decays, and note that the kinematics of the event selection currently used in the analysis of the WW* final state have reduced efficiency for spin two.
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