A General Search for New Phenomena in e-p Scattering at HERA

TL;DR

This paper conducts a comprehensive, model-independent search for deviations from the Standard Model in electron-proton scattering at HERA, analyzing various event topologies and finding no significant anomalies.

Contribution

It introduces a broad, model-independent analysis method for detecting deviations in e-p scattering data, covering all event topologies with high transverse momentum particles.

Findings

Most event classes agree with Standard Model predictions

No significant deviations or new phenomena observed

The analysis confirms the Standard Model's robustness in the studied phase space

Abstract

A model-independent search for deviations from the Standard Model prediction is performed in e-p collisions at HERA II using H1 data recorded during the years 2005 and 2006, corresponding to an integrated luminosity of 159 inv.pb. All event topologies involving isolated electrons, photons, muons, neutrinos and jets with high transverse momenta are investigated in a single analysis. Events are assigned to exclusive classes according to their final state. A statistical algorithm is used to search for deviations from the Standard Model in the distributions of the scalar sum of transverse momenta or invariant mass of final state particles and to quantify their significance. A good agreement with the Standard Model prediction is observed in most of the event classes. No significant deviation is found in the phase-space and event topologies covered by this analysis.