Recent Results from the L3 Experiment

TL;DR

This paper reports on measurements from the L3 experiment at LEP, analyzing fermion and boson production, gauge boson couplings, and searches for new physics like extra dimensions using data from 1997-1998.

Contribution

It provides new experimental results on Standard Model processes and constraints on theories beyond the Standard Model, including extra spatial dimensions.

Findings

Measured Standard Model cross sections at LEP energies.

Investigated triple gauge boson couplings and found results consistent with the Standard Model.

Set limits on the existence of extra spatial dimensions.

Abstract

A data sample corresponding to an integrated luminosity of 232pb^-1 was collected in 1997 and 1998 by the L3 experiment at LEP in e+e- collisions at centre-of-mass energies between 181.7GeV and 188.7GeV. Pair production of fermions and bosons is studied and compared with the Standard Model expectations. Events with a single detected photon or W boson are also considered. The measurement of several Standard Model cross sections is discussed. The presence and the magnitude of triple couplings of charged and neutral electroweak gauge bosons is investigated. These processes are used to probe New Physics beyond the Standard Model, including the existence of extra spatial dimensions.