New Physics Opportunities for Long-Lived Particles at Electron-Proton Colliders

Abstract

Future electron-proton collider proposals like the LHeC or the FCC-eh can supply 1/ab of collisions with a center-of-mass energy in the TeV range, while maintaining a clean experimental environment more commonly associated with lepton colliders. We point out that this makes electron-proton colliders ideally suited to probe BSM signatures with final states that look like "hadronic noise" in the high-energy, pile-up-rich environment of hadron colliders. We focus on the generic vector boson fusion production mechanism, which is available for all BSM particles with electroweak charges at mass scales far above the reach of most lepton colliders. This is in contrast to previous BSM studies at these machines, which focused on BSM processes with large production rates from the asymmetric initial state. We propose to exploit the unique experimental environment in the search for long-lived particle signals arising from Higgsinos or exotic Higgs decays. At electron-proton colliders, the soft decay products of long-lived Higgsinos can be explicitly reconstructed ("displaced single pion"), and very short lifetimes can be probed. We find that electron-proton colliders can explore significant regions of BSM parameter space inaccessible to other collider searches, with important implications for the design of such machines.

16 pages, 11 figures

References in corpus (30)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Echoes of a Hidden Valley at Hadron Colliders
• Asymmetric Dark Matter
• The Well-Tempered Neutralino
• Performance of the LHCb Vertex Locator
• Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Non-Abelian Dark Sectors and Their Collider Signatures
• Discovering the Higgs Through Highly-Displaced Vertices
• Phenomenology of Hidden Valleys at Hadron Colliders
• Neutralino Dark Matter at 14 and 100 TeV
• Simply Unnatural Supersymmetry
• The Leptoquark Hunter's Guide: Pair Production
• Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at sqrt(s) = 8 TeV
• Monojet plus soft dilepton signal from light higgsino pair production at LHC14
• Search for long-lived particles that decay into final states containing two electrons or two muons in proton-proton collisions at sqrt(s) = 8 TeV
• Nearly Degenerate Gauginos and Dark Matter at the LHC
• Probing Baryogenesis with Displaced Vertices at the LHC
• Possible Effects of a Hidden Valley on Supersymmetric Phenomenology
• Why Unparticle Models with Mass Gaps are Examples of Hidden Valleys
• Broadening the Higgs Boson with Right-Handed Neutrinos and a Higher Dimension Operator at the Electroweak Scale
• Wino-like Minimal Dark Matter and future colliders
• Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC
• The Relic Neutralino Surface at a 100 TeV collider
• Anticipating Non-Resonant New Physics in Dilepton Angular Spectra at the LHC
• Prospects for Electroweakino Discovery at a 100 TeV Hadron Collider
• Majorana neutrinos production at LHeC in an effective approach
• Hunting electroweakinos at future hadron colliders and direct detection experiments
• Experimental Constraints on Higgs Boson Decays to TeV-scale Right-Handed Neutrinos
• Single Production of Fourth Family $t^{\prime }$ Quarks at LHeC
• Seesaw Type I and III at the LHeC

Cited by in corpus (33)

• The Large Hadron-Electron Collider at the HL-LHC
• The Present and Future Status of Heavy Neutral Leptons
• Hunting wino and higgsino dark matter at the muon collider with disappearing tracks
• Probing right handed neutrinos at the LHeC and lepton colliders using fat jet signatures
• The experimental status of direct searches for exotic physics beyond the standard model at the Large Hadron Collider
• The discreet charm of higgsino dark matter - a pocket review
• Electroweak Dark Matter at Future Hadron Colliders
• Displaced vertex signature of type-I seesaw
• Probing Dark Matter with Disappearing Tracks at the LHC
• Long Live the Higgs Factory: Higgs Decays to Long-Lived Particles at Future Lepton Colliders
• Cornering Higgsino: Use of Soft Displaced Track
• Lepton-Trijet and Displaced Vertex Searches for Heavy Neutrinos at Future Electron-Proton Colliders
• Doubly-charged Higgs Boson at Future Electron-Proton Collider
• Angular and polarization trails from effective interactions of Majorana neutrinos at the LHeC
• Higgsino Dark Matter in a Non-Standard History of the Universe
• An Experiment for Electron-Hadron Scattering at the LHC
• Pseudo-Dirac Higgsino dark matter in GUT scale supersymmetry
• The signatures of the new particles $h_2$ and $Z_{\mu \tau }$ at e-p colliders in the $U(1{)}_{L_{\mu }-L_{\tau }}$ model
• Long Dead Winos
• Precision unification and Higgsino dark matter in GUT scale supersymmetry
• Long-Lived BLSSM Particles at the LHC
• Prospects for Heavy Scalar Searches at the LHeC
• Search for the SUSY Electroweak Sector at $ep$ Colliders
• Exotic Higgs decays into displaced jets at the LHeC
• The Genuine Type-V Seesaw Model: Phenomenological Introduction
• The Hierarchy Problem: From the Fundamentals to the Frontiers
• Closing the light gluino gap with electron-proton colliders
• Long-Lived Particles at Future Colliders
• Discovery potential of a long-lived partner of inelastic dark matter at MATHUSLA in $U(1{)}_{X_3}$ extension of the standard model
• Probing BSM physics with electron-proton colliders
• Charged lepton flavor violation associated with heavy quark production in deep inelastic lepton-nucleon scattering via scalar exchange
• Singlet-Doublet Self-interacting Dark Matter and Radiative Neutrino Mass
• BSM physics at the LHeC and the FCC-he