Missing particle associated with two bottom quarks at the LHC: Mono-$b$ versus 2$b$ with razor variables

Abstract

The extended Higgs sector, such as by a second Higgs doublet of type-II, provides portals to dark sector which contains missing particles at the LHC, e.g., dark matter (DM) particles. In this paper, working in the simplified model and taking into consideration the wide decay width effect of the mediator, we analyze the characteristic signatures of mono-$b$+MET and 2$b$+MET at the LHC. The latter signature was believed to be ineffective, while we found that, with the aid of razor shape analysis, it should be as important as the mono-$b$ signature. In the region of relatively low mediator mass (below a few hundred GeV), by requiring the signal to background ratio greater than a few percent, the 2$b$-tagged razor analysis has comparable sensitivity to the mono-$b$ search; it is even better for mediator lighter than $\sim 200$ GeV.

13 pages, 4 figures, version to appear in PRD

References in corpus (16)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Constraints on Dark Matter from Colliders
• Updated NNLO QCD predictions for the weak radiative B-meson decays
• Scalar Simplified Models for Dark Matter
• On the Validity of the Effective Field Theory for Dark Matter Searches at the LHC Part III: Analysis for the $t$-channel
• Higgs production in association with bottom quarks
• Search for dark matter in events with heavy quarks and missing transverse momentum in $pp$ collisions with the ATLAS detector
• Extending two-Higgs-doublet models by a singlet scalar field - the Case for Dark Matter
• A simplified 2HDM with a scalar dark matter and the galactic center gamma-ray excess
• Scalar Dark Matter Effects in Higgs and Top Quark Decays
• The Fermionic Dark Matter Higgs Portal: an effective field theory approach
• The top quark rapidity distribution and forward-backward asymmetry
• NMSSM explanations of the Galactic center gamma ray excess and promising LHC searches
• Higgs Boson Production in Association with Bottom Quarks
• Higher-Order QCD prediction for dark matter pair associated with a b-jet production at the LHC

Cited by in corpus (2)

• Simulating $b$-associated production of $Z$ and Higgs bosons with SHERPA
• Two-Higgs-doublet models in light of current experiments: a brief review