Probing electroweak symmetry breaking with Higgs pair production at the LHC

by Dr Juan Rojo (Vrije Universiteit Amsterdam)

Tuesday 15 Nov 2016, 13:00 → 14:00 Europe/Brussels

E.349 (Cyclotron)

The measurement of Higgs pair production will be a cornerstone of the LHC program in the coming years. Double Higgs production provides a crucial window upon the mechanism of electroweak symmetry breaking and has a unique sensitivity to a number of currently unknown Higgs couplings, like the Higgs trilinear and the coupling of a Higgs pair with two vector bosons. In this talk, I will present the feasibility of the measurement of Higgs pair production in the 4b final state at the LHC and at future 100 TeV collider, both in the gluon-fusion and in the vector-boson-fusion production mode. In the first case, I show how by using multivariate techniques one can achieve a 5-sigma discovery of Higgs pair production at the HL-LHC, and estimate the precision that can be achieved in the extraction of the Higgs self-coupling. In the second case, we show that already by the end of Run II one can provide stringent constraints on the hhVV coupling.

Slides rojo-HH4b-UCL.pdf