Showcasing HH production: Benchmarks for the LHC and HL-LHC

Abstract

Current projections suggest that the LHC will have only limited sensitivity to di-Higgs production in the Standard Model (SM), possibly even after the completion of its high luminosity phase. Multi-Higgs final states play a fundamental role in many extensions of the SM as they are intrinsically sensitive to modifications of the Higgs sector. Therefore, any new observation in multi-Higgs final states could be linked to a range of beyond the SM (BSM) phenomena that are not sufficiently addressed by the SM. Extensions of the Higgs sector typically lead to new phenomenological signatures in multi-Higgs final states that are vastly different from the SM expectation. In this work, we provide a range of signature-driven benchmark points for resonant and non-resonant BSM di-Higgs production that motivate non-SM kinematic correlations and multi-fermion discovery channels. Relying on theoretically well-motivated assumptions, special attention is devoted to the particular case where the presence of new physics will dominantly manifest itself in multi-Higgs final states. * Electronic address: philipp.basler@kit.edu † Electronic address: dawson@bnl.gov ‡ Electronic address: christoph.englert@glasgow.ac.uk § Electronic address: milada.muehlleitner@kit.edu * A recent summary of higher-order corrections to Higgs pair production can be found in [17].

The Higgs portal: Constraints on New Physics

“…In composite Higgs models additionally a novel 2-Higgs-2-fermion coupling appears. All these effects can induce cross sections that are considerably larger than the SM prediction [66].…”

Higgs self-coupling measurements using deep learning in the $$ b\overline{b}b\overline{b} $$ final state

“…Complementary production and decay modes for hh production are explored in refs. [89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104][105][106][107].…”

Probing the trilinear Higgs boson coupling in di-Higgs production at NLO QCD including parton shower effects

“…Refs. [22][23][24][25]. Recent phenomenological studies about the precision that could be reached for the trilinear coupling at the (HL-)LHC and future hadron colliders can be found for example in Refs.…”