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14 papers · 2 filters
Photo-production of psi' Mesons at HERA
C. Adloff
Quasi-elastic (z >0.95) photo-production of psi' mesons has been observed at HERA for photon-proton centre-of-mass energies in the range 40 to 160 GeV. The psi' mesons were identif…
QCD Tests at Colliders
Siegfried Bethke
A short review of the history and a 'slide-show' of QCD tests in annihilation is given. The world summary of measurements of is updated.
Low Q^2 Jet Production at HERA and Virtual Photon Structure
C. Adloff
The transition between photoproduction and deep-inelastic scattering is investigated in jet production at the HERA ep collider, using data collected by the H1 experiment. Measureme…
Determinations of alpha_s using JADE data of e^+e^- Annihilations at sqrt{s} = 22 to 44 GeV
P. A. Movilla Fernandez
Data recorded by the JADE experiment at the PETRA e^+e^- collider were used to measure distributions of new event shape observables. The distributions were compared with resummed Q…
Combined QCD analysis of e^+ e^- data at sqrt(s) = 14 to 172 GeV
O. Biebel
A study of the energy dependence of event shape observables is presented. The strong coupling constant α_s has been determined from the mean values of six event shape observables.…
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…