F. G. Oakham

Learn More
Cross-sections and angular distributions for hadronic and lepton pair final states in e+e− collisions at a centre-of-mass energy near 189 GeV, measured with the OPAL detector at LEP, are presented and compared with the predictions of the Standard Model. The results are used to measure the energy dependence of the electromagnetic coupling constant αem, and(More)
Bose-Einstein Correlations (BEC) of three identical charged pions were studied in 4× 106 hadronic Z0 decays recorded with the OPAL detector at LEP. The genuine three-pion correlations, corrected for the Coulomb effect, were separated from the known two-pion correlations by a new subtraction procedure. A significant genuine three-pion BEC enhancement near(More)
A search for pair produced scalar fermions with couplings that violate R-parity has been performed using a data sample corresponding to an integrated luminosity of 56 pb at a centre-of-mass energy of √ s = 183 GeV collected with the OPAL detector at LEP. An important consequence of R-parity breaking interactions is that the lightest supersymmetric particle(More)
Production of events with hadronic and leptonic final states has been measured in e+e− collisions at centre-of-mass energies of 130–172 GeV, using the OPAL detector at LEP. Cross-sections and leptonic forward-backward asymmetries are presented, both including and excluding the dominant production of radiative Zγ events, and compared to Standard Model(More)
New measurements are presented of the photon structure function F 2 (x; Q 2) at four values of Q 2 between 9 and 59 GeV 2 based on data collected with the OPAL detector at centre-of-mass energies of 161?172 GeV, with a total integrated luminosity of 18.1 pb ?1. The evolution of F 2 with Q 2 in bins of x is determined in the Q 2 range from 1.86 to 135 GeV 2(More)
Bose-Einstein Correlations (BEC) of three identical charged pions were studied in 4× 106 hadronic Z0 decays recorded with the OPAL detector at LEP. The genuine three-pion correlations, corrected for the Coulomb effect, were separated from the known two-pion correlations by a new subtraction procedure. A significant genuine three-pion BEC enhancement near(More)
Helicity density matrix elements for inclusive K(892) mesons from hadronic Z decays have been measured over the full range of K momentum using data taken with the OPAL experiment at LEP. A preference for occupation of the helicity zero state is observed at all scaled momentum xp values above 0.3, with the matrix element ρ00 rising to 0.66± 0.11 for xp> 0.7.(More)
Deep inelastic electron-photon scattering is studied using e + e ? data collected by the OPAL detector at centre-of-mass energies p s ee M Z 0. The photon structure function F 2 (x; Q 2) is explored in a Q 2 range of 1.1 to 6.6 GeV 2 at lower x values than ever before. To probe this kinematic region events are selected with a beam electron scattered into(More)
A study of b quark fragmentation at LEP is presented using a sample of semileptonic B decays containing a fully reconstructed charm meson. The data are compared to several theoretical models for heavy quark fragmentation; the free parameters in these models are tted and the sensitivity of the model parameters to the rate of P-wave B meson production is(More)