f1(1285) formation in two-photon collisions at LEP
نویسندگان
چکیده
منابع مشابه
Double Tag Events in Two-photon Collisions at Lep
Double tag events in two photon collisions are studied using the L3 detector at the LEP center of mass energies √ s ≃ 189 − 202 GeV. The cross-section of γ * γ * collisions is measured at an average photon virtuality Q 2 = 15 GeV 2. The results are in agreement with Monte Carlo predictions based on perturbative QCD, while the Quark Parton Model alone is insufficient to describe the data. The me...
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The reaction ee → eeγγ → ee hadrons is analysed for quasi-real virtual photons using data collected by the L3 detector during the LEP high energy runs at √ s = 183 and 189 GeV. Preliminary results on the cross sections σ(ee → ee hadrons) and σ(γγ → hadrons) are given in the interval 5 GeV ≤ Wγγ ≤ 145 GeV. The centre-of-mass energy dependence of the two-photon cross section is well described by ...
متن کاملJet production in two-photon collisions at LEP
Jet and di-jet production are studied in collisions of quasi-real photons collected during the LEP2 program at ee center-of-mass energies from 189 to 209GeV. OPAL reports good agreement of NLO perturbative QCD with the measured differential di-jet cross sections, which reach a mean transverse energy of the di-jet system of 25GeV. L3, on the other hand, finds drastic disagreement of the same cal...
متن کاملHow to Measure Diffraction in Two-photon Collisions at Lep
The possibility to measure diffraction dissociation in collisions of real and virtual photons at LEP2 is pointed out. e-mail: [email protected] e-mail: [email protected]
متن کاملQcd Measurements in Photon-photon Collisions at Lep *
An overview of the latest results of the LEP collaborations on QCD measurements in photon-photon collisions is presented, including measurements of the total hadronic cross-section, the production of heavy quarks and dijets and the structure functions of real and virtual photons.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2002
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(01)01477-0