Mirror World at the Large Hadron Collider

Abstract

A mirror world can modify in a striking way the LHC signals of the Higgs sector. An exact or approximate Z_2 symmetry between the mirror world and our world allows large mixing between the Higgs bosons of these worlds, leading to production rates and branching ratios for these states that are markedly different from the standard model and are characteristic of a mirror world. The constraints on these Higgs boson masses from precision electroweak data differ from the standard model bound, so that the new physics that cancels the quadratic divergence induced by the top quark may appear at a larger scale, possibly beyond the reach of the LHC. However, the scale of new physics needed to cancel the quadratic divergence induced by the Higgs boson is not significantly changed. With small breakings of the Z_2 parity, the lightest mirror quarks (and possibly charged mirror leptons) could be the dark matter in the universe, forming galactic halos that are stable to cooling. A possible signal from the relic radiation density of the mirror world is also discussed.

15 pages, 1 figure

References in corpus (7)

• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• A Minimal Spontaneously Broken Hidden Sector and its Impact on Higgs Boson Physics at the Large Hadron Collider
• Mirror matter-type dark matter
• Spheroidal galactic halos and mirror dark matter
• Experimental implications of mirror matter-type dark matter
• Discovering mirror particles at the Large Hadron Collider and the implied cold universe
• Prospects to measure the Higgs boson properties in ATLAS

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• Mirror particles and mirror matter: 50 years of speculation and search
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• A Supersymmetric Twin Higgs
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• Cosmology in Mirror Twin Higgs and Neutrino Masses
• Minimal Mirror Twin Higgs
• Narrow Trans-TeV Higgs Bosons and $H\to hh$ Decays: Two LHC Search Paths for a Hidden Sector Higgs Boson
• Spontaneous Mirror Parity Violation, Common Origin of Matter and Dark Matter, and the LHC Signatures
• Cosmological Constraints on Decoupled Dark Photons and Dark Higgs
• The experimental status of direct searches for exotic physics beyond the standard model at the Large Hadron Collider
• Exotic Quarks in Twin Higgs Models
• Gamma-rays from Dark Showers with Twin Higgs Models
• The Dark Top
• Signatures of Mirror Stars
• The spontaneous ${\mathbb{Z}}_2$ breaking Twin Higgs
• Neutron oscillations for solving neutron lifetime and dark matter puzzles
• Composite Twin Dark Matter
• Effective Theory of Flavor for Minimal Mirror Twin Higgs
• Jet Vetoes Interfering with H->WW
• Neutrinos and Lepton Flavour Violation in the Left-Right Twin Higgs Model
• Higgs Couplings at High Scales
• Direct Detection of Mirror Matter in Twin Higgs Models
• Dark Higgs Models at the 7 TeV LHC
• Strong CP and SUZ${}_2$
• Twin Higgs Portal Dark Matter
• How to Find a Hidden World at the Large Hadron Collider
• Mirror Cosmological Relaxation of the Electroweak Scale
• Hypercharged Naturalness
• The EDGES signal: An imprint from the mirror world?
• Flavorful Two Higgs Doublet Models with a Twist
• Dark matter and Higgs phenomenology predicted by left-right twin Higgs model in light of CDMS II results
• The Little Hierarchy in Universal Extra Dimensions
• Collider Signals of the Mirror Twin Higgs through the Hypercharge Portal
• Improved Naturalness and the Two Higgs Doublet Model
• Twin Quark Dark Matter From Cogenesis
• Partially Natural Two Higgs Doublet Models
• Gegenbauer's Twin
• Broken Symmetry as a Stabilizing Remnant
• The Type II Dirac Seesaw Portal to the mirror sector: Connecting neutrino masses and a solution to the strong CP problem
• Stable Colored Particles R-SUSY Relics or Not?
• Induced spontaneous symmetry breaking chain
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