Search for New Physics in Photon-Lepton Events in pbar-p Collisions at root-s= 1.8 TeV

TL;DR

This study searches for anomalous photon-lepton events in proton-antiproton collisions at 1.8 TeV, finding results mostly consistent with the Standard Model but noting an excess of events with large missing transverse energy.

Contribution

First search for photon-lepton events with large missing energy at Tevatron, analyzing 86 pb-1 of data to identify potential signs of new physics beyond the Standard Model.

Findings

Observed 16 photon-lepton events with large missing energy

Expected 7.6 ± 0.7 events based on Standard Model

Results largely consistent with Standard Model predictions

Abstract

We present the results of a search in pbar-p collisions at root-s=1.8 TeV for anomalous production of events containing a photon and a lepton (e or mu), both with large transverse energy, using 86 pb-1 of data collected with the Collider Detector at Fermilab during the 1994-95 collider run at the Fermilab Tevatron. The presence of large missing transverse energy, additional photons, or additional leptons in these events is also analyzed. The results are consistent with standard model expectations, with the possible exception of photon-lepton events with large missing transverse energy, for which the observed total is 16 events and the expected mean total is 7.6 \pm 0.7 events.