Searching for a Heavy Higgs boson in a Higgs-portal B-L Model

Abstract

We study the discovery prospects of a heavy neutral scalar arising from a $U(1{)}_{B-L}$ extension of the Standard Model (SM) during the Large Hadron Collider's high luminosity runs (HL-LHC). This heavy neutral scalar mixes with the SM Higgs boson through a Higgs portal and interacts with the SM particles with an interaction strength proportional to the sine of the mixing angle. The mixing between the two Higgs bosons is constrained by direct and indirect measurements. We choose an experimentally viable mixing angle and explore in detail the $ZZ$ and $WW$ decay modes of the heavy Higgs boson. For the $ZZ$ case, we focus on the cleanest $4\ell$ and $2\ell 2j$ final states and find that a heavy Higgs boson of mass smaller than 500 GeV can be discovered at the HL-LHC. For the $WW$ decay mode, we analyze the $\ell jj \slashed{E}_T$ signature. We implement novel background reduction techniques in order to tackle the huge background by performing both cut-based and multivariate analyses. However, large backgrounds render this channel challenging. We briefly discuss the discovery prospects of the heavy $Z^{\prime }$-boson arising in this model.

44 pages, 14 figures and 10 tables; v3 : Some typos fixed

References in corpus (46)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• 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
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• Jet substructure as a new Higgs search channel at the LHC
• Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV
• Neutrinos and Collider Physics
• Search for high-mass dilepton resonances in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Status of the Higgs Singlet Extension of the Standard Model after LHC Run 1
• Neutrino Masses and the LHC: Testing Type II Seesaw
• Techniques for improved heavy particle searches with jet substructure
• The Minimal Set of Electroweak Precision Parameters
• Search for resonances and quantum black holes using dijet mass spectra in proton-proton collisions at sqrt(s) = 8 TeV
• Search for heavy neutrinos and W bosons with right-handed couplings in proton-proton collisions at sqrt(s) = 8 TeV
• Complete Higgs Sector Constraints on Dimension-6 Operators
• Unbroken B-L Symmetry
• Precision Measurements of Higgs Couplings: Implications for New Physics Scales
• A second Higgs from the Higgs portal
• Model-independent precision constraints on dimension-6 operators
• Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at sqrt(s) = 8 TeV
• New Physics in LHC Higgs boson pair production
• Delta r and the W-boson mass in the Singlet Extension of the Standard Model
• Measurement of the W Boson Mass with the D0 Detector
• Observable Effects of General New Scalar Particles
• Towards consistent Electroweak Precision Data constraints in the SMEFT
• Vices and Virtues of Higgs EFTs at Large Energy
• Heavy neutrinos and the $pp\to lljj$ CMS data
• Testability of Type I Seesaw at the CERN LHC: Revealing the Existence of the B-L Symmetry
• Signatures for right-handed neutrinos at the Large Hadron Collider
• Search for Higgs boson pair production in the $b\bar{b}b\bar{b}$ final state from $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Effective Theories and Measurements at Colliders
• Search for production of $WW/WZ$ resonances decaying to a lepton, neutrino and jets in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• An Effective Guide to Beyond the Standard Model Physics
• New Higgs interactions and recent data from the LHC and the Tevatron
• Single Productions of Colored Particles at the LHC: An Example with Scalar Leptoquarks
• BSM Primary Effects
• On the consistent use of Constructed Observables
• How to use the Standard Model effective field theory
• Boosting Higgs discovery - the forgotten channel
• A search for high-mass resonances decaying to ${\tau }^{+}{\tau }^{-}$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• The Effective Standard Model after LHC Run I
• Dimension-6 Operator Constraints from Boosted VBF Higgs
• Benchmarks for Higgs Effective Theory: Extended Higgs Sectors
• Electroweak constraints on flavorful effective theories
• Phenomenology of the minimal $B-L$ Model: the Higgs sector at the Large Hadron Collider and future Linear Colliders

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• Heavy to light Higgs boson decays at NLO in the Singlet Extension of the Standard Model
• Lepton Number Violation and `Diracness' of massive neutrinos composed of Majorana states
• Top quark FCNCs in extended Higgs sectors
• Multicomponent dark matter in extended $U(1{)}_{B-L}$: neutrino mass and high scale validity
• Right Handed Neutrinos, TeV Scale BSM Neutral Higgs and FIMP Dark Matter in EFT Framework
• Electroweak Stability and Discovery Luminosities for New Physics
• Relativistic Freeze-in with Scalar Dark Matter in a Gauged $B-L$ Model and Electroweak Symmetry Breaking
• Flavonstrahlung in the $B_3-L_2$ $Z^{\prime }$ Model at Current and Future Colliders
• Phenomenological study of $Z^{\prime }$ in the minimal $B-L$ model at LHC
• ${\eta }_Q$ meson photoproduction in ultrarelativistic heavy ion collisions
• Higgs boson production in the $U(1{)}_{B-L}$ model at the ILC
• Searching for a Heavy Neutral CP-Even Higgs Boson in the BLSSM at the LHC Run 3 and HL-LHC
• Associated Higgs boson production with $Z$ boson in the minimal $U(1{)}_X$ extended Standard Model