Collider Phenomenology of Unparticle Physics

Abstract

Low energy phenomenology of the unparticle physics associated with an exact scale invariant sector possessing a non-trivial infrared fixed point at a higher energy scale is explored for both electron-positron and hadronic colliders. Feynman rules for a spin 0, 1 or 2 unparticle coupled to a variety of standard model gauge invariant operators that are relevant to many low energy processes involving either real emissions of unparticles or their virtual propagator effects are presented. Missing energy and/or recoil mass distributions of the unparticle in the associated production of unparticle together with a photon or $Z$ boson at LEP2 and ILC as well as in $Z$ decay into an unparticle plus a fermion-antifermion pair are studied. Monojet production at hadronic collisions is explored. The complex phase in the unparticle propagator that can give rise to interesting interference effects between an unparticle exchange diagram and the standard model amplitudes are studied in details for the Drell-Yan process as well as muon pair and diphoton production in electron-positron annihilation. These energy and/or recoil mass distributions (with the exception in hadron colliders) and interference effects are found sensitively depending not only on the scale dimension but also on the spin of the unparticle. For the spin-2 unparticle, its physical effects is found to resemble that of a tower of Kaluza-Klein gravitons, which strongly indicates that the underlying unparticle physics may have root in a higher dimensional theory. A connection between unparticle physics and theories of large extra dimension is speculated. Experimental constraints on the unparticle scale are deduced from the LEP2 data on mono-photon production and from the 4-fermion contact interactions.

37 pages. 16 figures, some additional comments and references

References in corpus (19)

• The Hierarchy Problem and New Dimensions at a Millimeter
• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Quantum Gravity and Extra Dimensions at High-Energy Colliders
• On Kaluza-Klein States from Large Extra Dimensions
• Unparticle Physics
• Another Odd Thing About Unparticle Physics
• Collider signals in unparticle physics
• Photon Events with Missing Energy in e+e- Collisions at sqrt{s} = 130 to 209 GeV
• Single- and Multi-Photon Events with Missing Energy in e+e- Collisions at LEP
• Unparticle Physics Effects on D0-anti-D0 Mixing
• Direct Signals of Low Scale Gravity at $e^{+}{e}^{-}$ Colliders
• Color-Octet Quarkonium Production at the $Z$ Pole
• B \to K(K^*) missing energy in Unparticle physics
• Global Study of Electron-Quark Contact Interactions
• Constraints on Electron-quark Contact Interactions and Implications to models of leptoquarks and Extra Z Bosons
• Global Lepton-Quark Neutral Current Constraint on Low Scale Gravity Model
• Measurement of the Low-x Behaviour of the Photon Structure Function F2-gamma
• J/Psi Production from Electromagnetic Fragmentation in Z decay

Cited by in corpus (114)

• Conformal Windows of SU(N) Gauge Theories, Higher Dimensional Representations and The Size of The Unparticle World
• Unparticle physics effects in B_s mixing
• Unparticles-Higgs Interplay
• Lepton flavor violating processes in unparticle physics
• Unparticle constraints from SN1987A
• Scalar modifications to gravity from unparticle effects may be testable
• Constraints on Non-Standard Neutrino Interactions and Unparticle Physics with Neutrino-Electron Scattering at the Kuo-Sheng Nuclear Power Reactor
• SUSY Unparticle and Conformal Sequestering
• Unparticle effect on B_s - \bar B_s mixing and its implications for B_s \to J/ψϕ, ϕϕdecays
• Contact Interactions and Resonance-Like Physics at Present and Future Colliders from Unparticles
• Unparticle Physics and Supersymmetry Phenomenology
• Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at sqrt(s) = 8 TeV
• Unparticles at heavy flavour scales: CP violating phenomena
• Probe of unparticles at the LHC in exclusive two lepton and two photon production via photon-photon fusion
• Probing neutrino magnetic moment and unparticle interactions with Borexino
• Possible signatures of unparticles in rare annihilation type B decays
• Constraints on Unparticle Interactions from Invisible Decays of Z, Quarkonia and Neutrinos
• Astro Unparticle Physics
• Un-graviton corrections to the Schwarzschild black hole
• Unraveling unparticles through violation of atomic parity and rare beauty
• Lepton flavor violating $\mu \to e\gamma$ and $\mu -e$ conversion in unparticle physics
• Unparticle Physics with Jets
• Unparticle physics at the photon collider
• Constraints on Unparticles from Low Energy Neutrino-Electron Scattering
• Tensorial NSI and Unparticle physics in neutrino scattering
• Unparticle Self-Interactions and Their Collider Implications
• Unparticle physics in diphoton production at the CERN LHC
• Cosmological Constraints on Unparticles as Continuous Mass Scalars
• Vector unparticle enhanced black holes: exact solutions and thermodynamics
• Constraints from Solar and Reactor Neutrinos on Unparticle Long-Range Forces
• Antisymmetric rank--2 tensor unparticle physics
• Un-particle Effective Action
• Test of unparticle long range forces from perihelion precession of Mercury
• Direct CP violation of $B\to l\nu$ in unparticle physics
• Cosmological Unparticle Correlators
• Simulation of Z plus Graviton/Unparticle Production at the LHC
• Differentiating unparticles from extra dimensions via mini black hole thermodynamics
• On the RS2 realization of unparticles
• Identification of the Origin of Monojet Signatures at the LHC
• Unparticle-Induced Lepton Flavor Violating Decays τ^- ->l^- (V^0, ~P^0)
• Unparticle physics in top pair signals at the LHC and ILC
• Probing the unparticle signal in $b\to d$ penguin processes
• Constraints on Scalar-Pseudoscalar and Tensorial Non-Standard Interaction and Tensorial Unparticle Couplings from Neutrino-Electron Scattering
• Constraints on unparticle long range forces from big bang nucleosynthesis bounds on the variation of the gravitational coupling
• Real Emission and Virtual Exchange of Gravitons and Unparticles in Pythia8
• On the Decay of Unparticles
• Constraints on Unparticle Interactions from Particle and Antiparticle Oscillations
• Unparticle Searches Through Gamma Gamma Scattering
• Disentangling the Unparticles with polarized beams at e+e- colliders
• Unparticle physics and neutrino phenomenology
• Unparticle signals with a few particles
• Weak properties of the tau lepton via a spin-0 unparticle
• The large CP phase in B(s) - anti-B(s) mixing and Unparticle Physics
• Muon Anomalous Magnetic Moment and Lepton Flavor Violating Tau Decay in Unparticle Physics
• W-pair production in Unparticle Physics
• Bounds from LEP on unparticle interactions with electroweak bosons
• Constraints on unparticle physics from the $gt\bar{t}$ anomalous coupling
• Interpretation of neutral charm mesons near threshold as unparticles
• Unparticle Physics in Single Top Signals
• Unparticle Physics in the Moller Scattering
• Effects of Unparticles on Running of Gauge Couplings
• Unparticle Induced Baryon Number Violating Nucleon Decays
• Unparticle physics with broken scale invariance
• Scalar Unparticle Signals at the LHC
• Lepton flavor violating Z boson decays induced by scalar unparticle
• Relaxing the Cosmological Constraints on Unparticle Dark Component
• Unparticle physics effects in (Lambda_b -> Lambda + missing energy) processes
• Unparticle contribution to the hydrogen atom ground state energy
• Higgs Boson Decays into Single Photon plus Unparticle
• Unparticle Searches Through Compton Scattering
• Electromagnetic Dipole Moments and Radiative Decays of Particles from Exchange of Fermionic Unparticles
• Vector Bosons in the Randall-Sundrum 2 and Lykken-Randall models and unparticles
• A Simple-Minded Unitarity Constraint and an Application to Unparticles
• Fermionic un-particles, gauge interactions and the $\beta$ function
• Lepton electric and magnetic dipole moments via lepton flavor violating spin-1 unparticle interactions
• Effect of top quark spin on the unparticle couplings in γγ\to t\bar{t}
• A note on unparticle in lower dimensions
• Unparticle contributions to $\Bs$-$\Bsbar$ mixing
• CP-Conserving Unparticle Phase Effects on the Unpolarized and Polarized Direct CP Asymmetry in $b\to d{\ell }^{+}{\ell }^{-}$ Transition
• Unparticle Effects on Unitarity Constraints from Higgs Boson Scattering
• Deconstructing unparticles in higher dimensions
• Top Quark Asymmetries and Unparticle Physics
• Bananas are Unparticles: Differential Equations and Cosmological Bootstrap
• Analysis of mu-tau conversion through μN -> τX deep inelastic scattering induced by unparticles
• Thermodynamic Properties of Static and Rotating Unparticle Black Holes
• Constraining Unparticles from Top Physics at TeVatron
• Unparticle Self-Interactions at the Large Hadron Collider
• Point Production of a Nonrelativistic Unparticle Recoiling Against a Particle
• Constraints on vector unparticle physics from cosmic censorship
• Unparticle effects on top quark rare decays
• Bound states and fermiophobic Unparticle oblique corrections to the photon
• Unparticle inspired corrections to the Gravitational Quantum Well
• Collider Effects of Unparticle Interactions in Multiphoton Signals
• Probing neutrino nature at Borexino detector with chromium neutrino source
• Constraints on Astro-unparticle Physics from SN 1987A
• Strongly Coupled Sectors in Inflation: Gapless Theories and Unparticles
• Unparticles in Gluodynamics
• On possibility of time reversal symmetry violation in neutrino elastic scattering on polarized electron target
• Neutron Stars, Ungravity, and the I-Love-Q relation
• Lepton flavor conserving Z boson decays and scalar unparticle
• Lepton flavor violating Higgs decays and unparticle physics
• Unparticle effects in rare (t -> c g g) decay
• $R(K^{(\ast )})$ with vector unparticles
• Quasinormal modes of unparticle black holes
• Unparticle-Enhanced Black Holes at the LHC
• Probing scalar particle and unparticle couplings in e+ e- -> t tbar with transversely polarized beams
• Unparticle Searches Through Low Energy Parity Violating Asymmetry
• B \to 0^{+}(1^{+}) + missing energy in Unparticle Physics
• Unparticle Effects on Top Quark Pair Production at Photon Collider
• The effect of antisymmetric tensor unparticle mediation on the charged lepton electric dipole moment
• On Unparticles and K+ to pi+ Missing Energy
• Antisymmetric tensor unparticle and the radiative lepton flavor violating decays
• Azimuthal asymmetry of recoil electrons in neutrino-electron elastic scattering as signature of neutrino nature
• Unparticle effects on cosmic ray photon and $e^{\pm }$