Measurement of the jet width in gamma-gamma collisions and in e+e- annihilation process at TRISTAN

الأصل · EN

The shape of jets produced in (quasi-) real photon-photon collisions as well as in e+e- annihilation process has been studied with a cone jet finding algorithm, using the data taken with the TOPAZ detector at the TRISTAN e+e- collider at an average center-of-mass energy of 58 GeV. The results are presented in terms of the jet width as a function of the jet transverse energy(Ejetₜ) as well as a scaled transverse jet energy, xₜ(=2Ejetₜ/root(s)). The jet width narrows as Ejetₜ increases; however, at the same value of Ejetₜ the jet width in gamma-gamma collisions at TRISTAN is significantly narrower than that in gamma p collisions at HERA. By comparing our results with the data in other reactions, it has been shown that the jet width in gamma-gamma, gamma p, pp collisions as well as the e+e- annihilation process has an approximate scaling behavior as a function of xₜ.