12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Determination of the e+ e- ! Gamma (gamma) cros...
View graph of relations

« Back

Determination of the e+ e- ! Gamma (gamma) cross-section at LEP 2.

Research output: Contribution to journalJournal article

Published

Journal publication date11/2004
JournalEuropean Physical Journal C: Particles and Fields
Journal number4
Volume37
Number of pages15
Pages405-419
Original languageEnglish

Abstract

A test of the benchmark QED process is reported, using the data collected with the DELPHI detector at LEP 2. The data analysed were recorded at centre-of-mass energies ranging from 161 GeV to 208 GeV and correspond to a total integrated luminosity of 656.4 pb-1. The Born cross-section for the process was determined, confirming the validity of QED at the highest energies ever attained in electron-positron collisions. Lower limits on the parameters of a number of possible deviations from QED, predicted within theoretical frameworks expressing physics beyond the Standard Model, were derived.