Projects per year
Abstract
Abstract With the upgrade of the LHC, the couplings of the observed Higgs particle to fermions and gauge bosons will be measured with a much higher experimental accuracy than current measurements, but will still be limited by an order 10% theoretical uncertainty. In this paper, we reemphasize the fact that the ratio of Higgs signal rates into two photons and four leptons, D γ γ = σ ( p p → H → γ γ ) / σ ( p p → H → Z Z ⁎ → 4 ℓ ± ) can be made free of these ambiguities. Its measurement would be limited only by the statistical and systematic errors, which can in principle be reduced to the percent level at a highluminosity LHC. This decay ratio would then provide a powerful probe of new physics effects in addition to high precision electroweak observables or the muon g − 2 . As an example, we show that the Higgs couplings to top quarks and vector bosons can be constrained at the percent level and that new Higgs or supersymmetric particles that contribute to the H γ γ loop can be probed up to masses in the multiTeV range and possibly larger than those accessible directly.
Original language  English 

Pages (fromto)  412419 
Number of pages  8 
Journal  Physics Letters, Section B: Nuclear, Elementary Particle and HighEnergy Physics 
Volume  757 
Early online date  11 Apr 2016 
DOIs  
Publication status  Published  10 Jun 2016 
Fingerprint
Dive into the research topics of 'Into the multiTeV scale with a Higgs golden ratio'. Together they form a unique fingerprint.Projects
 1 Finished

From supersymmetry, strings and branes to the LHC and cosmology
Ellis, J., West, P., Acharya, B., Alexandre, J., Drukker, N., Fairbairn, M., Gromov, N., Lambert, N., Lim, E., Martelli, D., Mavromatos, N., Papadopoulos, G., Sakellariadou, M., Sarkar, S. & SchaferNameki, S.
STFC Science and Technology Facilities Council
1/10/2014 → 30/09/2018
Project: Research