Contact Interactions and high-Q2 events in e^+ p collisions at HERA

Abstract

We consider $eeqq$ contact interactions as a possible origin of an excess of events above Standard Model predictions in $e^{+}p\to e^{+}jet$ at high $Q^2$ observed by the H1 and ZEUS collaborations at HERA. The HERA data prefer chirality RL or LR contact terms and atomic physics parity violation measurements severely limit parity-odd contact terms. With equal left-right and right-left chirality interactions at an effective scale of order 3 TeV we are able to reproduce the main features of the HERA data and still be consistent with Drell-Yan pair production at the Tevatron and hadron production at LEP 2 and TRISTAN.

arXiv commentRevTex, 12 pages, 4 figures. Slight changes in Figs.2 and 3

References in corpus (9)

• Improved Parton Distributions from Global Analysis of Recent Deep Inelastic Scattering and Inclusive Jet Data
• Global QCD Analysis and the CTEQ Parton Distributions
• Parton Distributions of the Proton
• Inclusive jet cross section in $\bar{p}p$ collisions at $\sqrt{s}=1.8$ TeV
• Parton distributions: a study of the new HERA data, ${\alpha }_s$, the gluon and $p\bar{p}$ jet production
• A Comprehensive Study of Leptoquark Bounds
• Signatures of Scalar Top with R-parity Breaking Coupling at HERA
• HERA prospects on Compositeness and New Vector Bosons
• Natural Conservation of R Parity in Supersymmetry

Cited by in corpus (17)

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• High Q2-Anomaly at HERA and Supersymmetry
• What if Charged Current Events at Large Q2 are Observed at HERA ?
• Stops in R-parity Breaking Model for High-$Q^2$ Events at HERA
• Scalar meson mediated nuclear mu-e conversion
• Supersymmetry and Charged Current Events at HERA
• Contact Interactions Involving Right-handed Neutrinos and SN1987A
• Supersymmetric interpretation of high--$Q^2$ HERA events and other related issues
• Implications of the HERA Events for the R-Parity Breaking SUSY Signals at Tevatron
• Has the Substructure of Quarks and Leptons Been Found also by the H1 and ZEUS Detectors at HERA?
• Constraints on Non-Standard Contributions to the Charged-Current Interactions
• Impact on SUSY-Breaking Models of the $R$-Parity Violating Squark Interpretation of the HERA Anomaly
• Single leptoquark production at high-energy e+ e- colliders
• Current constraints on squark production scenarios for the excess of high $Q^2$ events at HERA