Global Study of Electron-Quark Contact Interactions

Abstract

We perform a global fit of data relevant to $eeqq$ contact interactions, including deep inelastic scattering at high $Q^2$ from ZEUS and H1, atomic physics parity violation in Cesium from JILA, polarized $e^{-}$ on nuclei scattering experiments at SLAC, Mainz and Bates, Drell-Yan production at the Tevatron, the total hadronic cross section ${\sigma }_{had}$ at LEP, and neutrino-nucleon scattering from CCFR. With only the new HERA data, the presence of contact interactions improves the fit compared to the Standard Model. When other data sets are included, the size of the contact contributions is reduced and the overall fit represents no real improvement over the Standard Model.

26 pages (now single-spaced), Revtex, 2 eps figures, uses epsf.sty. Some clarifications, minor corrections, 2 new references, also 3 new tables which present 95% CL bounds on the contact interaction scales Lambda

References in corpus (18)

• Comparison of ZEUS Data with Standard Model Predictions for e^+ p -> e^+ X Scattering at High x and Q^2
• Observation of Events at Very High Q^2 in ep Collisions at HERA
• Much Ado About Leptoquarks: A Comprehensive Analysis
• Supersymmetry with R-Parity Breaking: Contact Interactions and Resonance Formation in Leptonic Processes at LEP2
• Leptoquark/Squark Interpretation of HERA Events: Virtual Effects in e+e- Annihilation to Hadrons
• R-Parity Violation at HERA ?
• Comments on the high-$Q^2$ HERA anomaly
• R-Parity Violation and Unification
• QCD aspects of leptoquark production at HERA
• QCD Corrections and the Leptoquark Interpretation of the HERA High Q^2 Events
• Contact Terms, Compositeness, and Atomic Parity Violation
• Contact Interactions and high-Q2 events in e^+ p collisions at HERA
• Constraints on the Universal Contact Interaction
• Four-Fermion Effective Interactions and Recent Data at HERA
• Are the H1 and ZEUS "High Q^2 Anomalies" Compatible with Each Other?
• Comment on $Z^{\prime }$'s and the H1 and ZEUS High $Q^2$ Anomalies
• Leptoquarks and vector-like strong interactions at the TeV scale
• Has the Substructure of Quarks and Leptons Been Found also by the H1 and ZEUS Detectors at HERA?

Cited by in corpus (34)

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• Physical Aspects of the Space-Time Torsion
• Physics of leptoquarks in precision experiments and at particle colliders
• Collider Phenomenology of Unparticle Physics
• Muon Anomalous Magnetic Moment and Leptoquark Solutions
• Constraints on two-lepton, two quark operators
• Explaining the Lepton Non-universality at the LHCb and CMS from a Unified Framework
• Global Constraints on Lepton-Quark Contact Interactions
• Constraints on Electron-quark Contact Interactions and Implications to models of leptoquarks and Extra Z Bosons
• Torsion action and its possible observables
• Atomic Parity Violation, Leptoquarks, and Contact Interactions
• Global Lepton-Quark Neutral Current Constraint on Low Scale Gravity Model
• Universal Torsion-Induced Interaction from Large Extra Dimensions
• Center-Edge Asymmetry at Hadron Colliders
• Discriminating graviton exchange effects from other new physics scenarios in e^+e^- collisions
• Scalar neutrino dark matter in $U(1{)}_X$SSM
• Bounds on Four-Fermion Contact Interactions Induced by String Resonances
• Scalar meson mediated nuclear mu-e conversion
• 5D UED: Flat and Flavorless
• Don't Stop Thinking About Leptoquarks: Constructing New Models
• Renormalizability and the model independent observables for abelian Z' search
• New physics signatures at a Linear Collider: model-independent analysis from `conventional' polarized observables
• Model-independent constraints on contact interactions from LEP2 data analysis
• Model-independent limits on four-fermion contact interactions at LC with polarization
• Constraints on String Resonance Amplitudes
• Study of R-parity Violation at a mu-p Collider
• Optimal polarized observables for model-independent new-physics search at e+e- colliders
• Contact Interactions Involving Right-handed Neutrinos and SN1987A
• Supersymmetric One-family Model without Higgsinos
• Contact interaction probes at the Linear Collider with polarized electron and positron beams
• Impact on SUSY-Breaking Models of the $R$-Parity Violating Squark Interpretation of the HERA Anomaly
• Physics Potential of a Tevatron Tripler
• Flavor-changing axions and Dirac neutrino masses
• Model independent constraints on contact interactions from LEP2