Study of inclusive strange-baryon production and search for pentaquarks in two-photon collisions at LEP

The eective mass spectra of the measured particles ( W vis ) are compared with the Monte Carlo predictions for l 0 (Fig. Details of systematic errors are given in Table 4.

4 Supported by the National Natural Science Foundation of China... The first uncertainty on cross sections is statistical and the second one systematic. The first uncertainty on

The contributions to charm production from soft processes described by the Vector Dominance Model (VDM) and from doubly resolved processes are expected to be small. The production

The average value hW γγ i of each bin corresponds to a weighted average according to a W γγ −12 distribution. The first uncertainty is statistical, the second systematic... The

This letter describes the results of a measurement of the e + e − → e + e − c¯ cX cross section at centre-of-mass energies ranging from 183 to 208 GeV. The data sample corresponds to

- E,/pt, where Et is the transverse energy measured in the electromagnetic calorimeter and pt is the trans- verse momentum measured in the tracker. The NN input

Study of the K[0s]K[0s] final state and the K[0s] inclusive production in two-photon collisions with the L3 detector at LEP..

The cross sec- ¯ tion for open charm production in two-photon colli- sions therefore depends on the charm quark mass and on the gluonic parton density function of the