AbstractInclusive J/ψ production in photon–photon collisions has been observed at LEP II beam energies. A clear signal from the reaction γγ→J/ψ+X is seen. The number of observed N(J/ψ→μ+μ−) events is 36±7 for an integrated luminosity of 617 pb−1, yielding a cross-section of σ(J/ψ+X)=45±9(stat)±17(syst) pb. Based on a study of the event shapes of different types of γγ processes in the PYTHIA program, we conclude that (74±22)% of the observed J/ψ events are due to ‘resolved’ photons, the dominant contribution of which is most probably due to the gluon content of the photon
The formation of the η′ in the reaction e+e−→e+e−η′→e+e−π+π−γ has been measured by the L3 detector a...
Exclusive ρ+ρ− production in two-photon collisions between a quasi-real photon, γ *, and a mid-virtu...
AbstractEvents with a final state consisting of two or more photons and large missing transverse ene...
Single- and multi-photon events with missing energy are selected in 619 pb−1 of data collected by th...
The QED processes e+e− → e+e−μ+μ− and e+e− → e+e−τ+τ− are studied with the L3 detector at LEP using ...
Inclusive jet production, e+e− → e+e− jet X, is studied using 560 pb−1 of data collected at LEP with...
Inclusive charged hadron production, e+e−→e+e−h±X, is studied using 414 pb^(−1) of data collected at...
The reactions e(+)e(-) --> e(+)e(-) LambdaX and e(+)e(-) --> e(+)e(-) LambdaX are studied using data...
AbstractDouble-tag events in two-photon collisions are studied using the L3 detector at LEP centre-o...
Inclusive J/psi production in photon-photon collisions has been observed at LEP II beam energies. A ...
Single and multi-photon events with missing energy are analysed using data collected with the L3 det...
The K0S K0S final state in two-photon collisions is studied with the L3 detector at LEP. The mass sp...
AbstractA search for gravitinos produced in e±p collisions is performed using the H1 detector at HER...
The cross section of charm production in γγ collisions σ(e+e−→e+e−cc̄X) is measured at LEP with the ...
The cross section for open-beauty production in photon–photon collisions is measured using the whole...
The formation of the η′ in the reaction e+e−→e+e−η′→e+e−π+π−γ has been measured by the L3 detector a...
Exclusive ρ+ρ− production in two-photon collisions between a quasi-real photon, γ *, and a mid-virtu...
AbstractEvents with a final state consisting of two or more photons and large missing transverse ene...
Single- and multi-photon events with missing energy are selected in 619 pb−1 of data collected by th...
The QED processes e+e− → e+e−μ+μ− and e+e− → e+e−τ+τ− are studied with the L3 detector at LEP using ...
Inclusive jet production, e+e− → e+e− jet X, is studied using 560 pb−1 of data collected at LEP with...
Inclusive charged hadron production, e+e−→e+e−h±X, is studied using 414 pb^(−1) of data collected at...
The reactions e(+)e(-) --> e(+)e(-) LambdaX and e(+)e(-) --> e(+)e(-) LambdaX are studied using data...
AbstractDouble-tag events in two-photon collisions are studied using the L3 detector at LEP centre-o...
Inclusive J/psi production in photon-photon collisions has been observed at LEP II beam energies. A ...
Single and multi-photon events with missing energy are analysed using data collected with the L3 det...
The K0S K0S final state in two-photon collisions is studied with the L3 detector at LEP. The mass sp...
AbstractA search for gravitinos produced in e±p collisions is performed using the H1 detector at HER...
The cross section of charm production in γγ collisions σ(e+e−→e+e−cc̄X) is measured at LEP with the ...
The cross section for open-beauty production in photon–photon collisions is measured using the whole...
The formation of the η′ in the reaction e+e−→e+e−η′→e+e−π+π−γ has been measured by the L3 detector a...
Exclusive ρ+ρ− production in two-photon collisions between a quasi-real photon, γ *, and a mid-virtu...
AbstractEvents with a final state consisting of two or more photons and large missing transverse ene...