Speaker
Description
The Standard Model (SM) of particle physics predicts a minimal Higgs
sector and the existence of one Higgs boson that has already been
discovered at the Large Hadron Collider (LHC). However, nothing
prevents nature from having a non minimal Higgs sector. In
particular, when a set of theoretical and experimental constraints
are taken into account, it is possible to postulate theories beyond
the SM that aim at solving some of its shortcomings. One simple
example is the 2 Higgs Doublet Model (2HDM), which predicts a total
of ve Higgs bosons.
In this context, trilinear Higgs self coupling is an important
parameter to properly characterize the Higgs potential and determine
the Higgs sector that is realized in nature. Moreover, the loose
experimental constraints on it available so far allow for a
reasonable deviation from the SM expectation. Access to this
parameter can be provided by Higgs pair production processes. The
small cross section of this process requires higher luminosity
prospected at further runs of the LHC. Focusing on the High
Luminosity LHC, we evaluate several observables in the framework of
the 2HDM, namely, the total di-Higgs production cross section and
the differential cross section distributions with respect to the
invariant mass of two SM-like Higgses in the nal state. We explore
dierent scenarios that were obtained to maximize the trilinear Higgs
couplings and evaluate whether the corresponding eect on the
aforementioned observables can be determined with sucient
signicance. We furthermore analyze the eect of the contribution of
the resonant diagram involving a heavy CP even Higgs exchange, its
mass and total decay width. Finally, we point out the experimental
challenges of setting an appropriate bin location and size for
extracting these features of the model out of the invariant mass
distributions.
| Category | Particle / Astroparticle / Cosmology (Theory) |
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