144 citations · 795 across the 23 of their papers we have counts for
24 papers
Measurement of the branching fraction of the decay at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal +389
We measure the branching fraction of the decay using data collected with the Belle II detector. The data contain 387 million pairs produced i…
Search for Anomalous Production of Di-lepton Events with Missing Transverse Momentum in e+e- Collisions at sqrt(s) = 183-209 GeV
The OPAL collaboration, G. Abbiendi
In total 1317 di-lepton events with significant missing transverse momentum were identified in a total data sample of 680 pb-1 collected at e+e- centre-of-mass energies ranging fro…
Search for Anomalous Photonic Events with Missing Energy in e+e- Collisions at Ecm = 130, 136 and 183 GeV
The OPAL Collaboration, G. Abbiendi et al
Photonic events with large missing energy have been observed in e+e- collisions at centre-of-mass energies of 130, 136 and 183 GeV collected in 1997 using the OPAL detector at LEP.…
A Measurement of Rb using a Double Tagging Method
The OPAL Collaboration, G. Abbiendi et al
The fraction of Z to bbbar events in hadronic Z decays has been measured by the OPAL experiment using the data collected at LEP between 1992 and 1995. The Z to bbbar decays were ta…
Measurement of the Longitudinal Cross-Section using the Direction of the Thrust Axis in Hadronic Events at LEP
The OPAL Collaboration, G. Abbiendi et al
In the process e+e- to hadrons, one of the effects of gluon emission is to modify the 1+cos(theta)**2 form of the angular distribution of the thrust axis, an effect which may be qu…
A Study of Parton Fragmentation in Hadronic Z0 Decays Using Lambda-Lambdabar Correlations
The OPAL Collaboration, G. Abbiendi et al
The correlated production of Lambda and Lambdabar baryons has been studied using 4.3 million multihadronic Zo decays recorded with the OPAL detector at LEP. Di-lambda pairs were in…
First Measurement of Z/gamma* Production in Compton Scattering of Quasi-real Photons
OPAL Collaboration, G. Abbiendi et al
We report the first observation of Z/gamma* production in Compton scattering of quasi-real photons. This is a subprocess of the reaction e+e- to e+e-Z/gamma*, where one of the fina…
Search for Scalar Top and Scalar Bottom Quarks at sqrt(s) = 183 GeV at LEP
The OPAL Collaboration, K. Ackerstaff et al
Searches for a scalar top quark and a scalar bottom quark have been performed using a total data sample of 56.8 pb-1 at a centre-of-mass energy of 183 GeV collected with the OPAL d…
Search for Higgs Bosons and New Particles Decaying into Two Photons at sqrt(s) = 183 GeV
The OPAL Collaboration, K. Ackerstaff et al
A search for the resonant production of high mass photon pairs associated with a leptonic or hadronic system has been performed using a data sample of 57.7 pb-1 collected at an ave…
Measurement of the Average Polarization of b Baryons in Hadronic Z^0 Decays
The OPAL Collaboration, G. Abbiendi et al
In the Standard Model, b quarks produced in e^+e^- annihilation at the Z^0 peak have a large average longitudinal polarization of -0.94. Some fraction of this polarization is expec…
Measurements of Flavour Dependent Fragmentation Functions in Z^0 -> qq(bar) Events
The OPAL Collaboration, K. Ackerstaff et al
Fragmentation functions for charged particles in Z -> qq(bar) events have been measured for bottom (b), charm (c) and light (uds) quarks as well as for all flavours together. The r…
Search for Stable and Long-Lived Massive Charged Particles with the OPAL Detector at LEP in e+e- Collisions at \sqrt{s}=130-183 GeV
The OPAL Collaboration, K. Ackerstaff et al
A search for stable and long-lived massive particles of electric charge |Q/e| = 1 or 2/3, pair-produced in e+e- collisions at centre-of-mass energies from 130 to 183 GeV, is report…
An upper limit on the anomalous magnetic moment of the τlepton
The OPAL Collaboration, K. Ackerstaff et al
Using radiative Z^0 -> τ^+ τ^- γevents collected with the OPAL detector at LEP at \sqrt{s}= M_Z during 1990-95, a direct study of the electromagnetic current at the τγvertex has be…
A Search for Neutral Higgs Bosons in the MSSM and Models with Two Scalar Field Doublets
The OPAL Collaboration, K. Ackerstaff et al
A search is described for the neutral Higgs bosons h^0 and A^0 predicted by models with two scalar field doublets and, in particular, the Minimal Supersymmetric Standard Model (MSS…
Search for an Excess in the Production of Four-Jet Events from e^+e^- Collisions at \sqrt{s} = 130-184 GeV
The OPAL Collaboration, K. Ackerstaff et al
Events with four distinct jets from e^+e^- collisions, collected by the OPAL detector at centre-of-mass energies between 130 and 184 GeV, are analysed for a peak in the sum of dije…
Production of f_0(980), f_2(1270) and ϕ(1020) in hadronic Z^0 decay
The OPAL Collaboration, K. Ackerstaff et al
Inclusive production of the f_0(980), f_2(1270) and ϕ(1020) resonances has been studied in a sample of 4.3 million hadronic Z^0 decays from the OPAL experiment at LEP. A coupled ch…
Measurements of the B^0_s and Λ_b Lifetimes
The OPAL Collaboration, K. Ackerstaff et al
This paper presents updated measurements of the lifetimes of the B^0_s meson and the Λ_b baryon using 4.4 million hadronic Z^0 decays recorded by the OPAL detector at LEP from 1990…
Measurement of triple gauge boson couplings from W^+W^- production at sqrt{s} = 172 GeV
The OPAL Collaboration, K. Ackerstaff et al
We present measurements of triple gauge boson coupling parameters using data recorded by the OPAL detector at LEP2 at a centre-of-mass energy of 172 GeV. A total of 120 W-pair cand…
Search for a Massive Di-photon Resonance at sqrt{s} = 91-172 GeV
The OPAL Collaboration, K. Ackerstaff et al
A search for the resonant production of high mass photon pairs associated with a leptonic or hadronic system has been performed using a total data sample of 25.7 pb^-1 taken at cen…
Measurement of the Photon Structure Function F_2^gamma at Low x
The OPAL Collaboration, K. Ackerstaff et al
Deep inelastic electron-photon scattering is studied using e+e- data collected by the OPAL detector at centre-of-mass energies sqrt{s_ee} ~ M_{Z^0}. The photon structure function F…
A Measurement of the B_s^0 Lifetime using Reconstructed D_s^- Mesons
The OPAL Collaboration, K. Ackerstaff et al
We report a measurement of the B^0_s meson lifetime from B_s^0 -> D^-_s X decays, where D_s^- mesons are reconstructed in the D_s^- -> phi pi^- and D_s^- -> K^{*0} K^- decay channe…
Spin alignment of leading K*(892)^0 mesons in hadronic Z^0 decays
The OPAL Collaboration, K. Ackerstaff et al
Helicity density matrix elements for inclusive K*(892)^0 mesons from hadronic Z^0 decays have been measured over the full range of K^*0 momentum using data taken with the OPAL expe…
Measurement of f(c -> D^*+ X), f(b -> D^*+ X) and Gamma_cc(bar)/Gamma_had using D^*+/- Mesons
The OPAL Collaboration, K. Ackerstaff et al
The production rates of D^*+/- mesons in charm and bottom events at centre-of-mass energies of about 91 GeV and the partial width of primary cc(bar) pairs in hadronic Z^0 decays ha…
A Study of B Meson Oscillations Using Hadronic Z^0 Decays Containing Leptons
The OPAL Collaboration, K. Ackerstaff et al
An event sample enriched in semileptonic decays of b hadrons is selected using an inclusive lepton selection from approximately 3.0 million hadronic Z^0 decays collected with the O…