Multihadron production greater than expected

The cross section for the annihilation of an electron and a positron into hadrons is much higher than many had expected, according to new experiments performed with the electron–positron colliding beam devices at the Cambridge Electron Accelerator and at Adone in Frascati, Italy. Although the error bars are large, the multihadron production cross section is, for example, much higher than a simple quark model would predict.