ISSN:
1434-6052
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract A search for directly produced electrons in 70 GeV/cpp interactions has been performed using BEBC equipped with a hydrogen filled track sensitive target surrounded by a hydrogen/neon blanket. No candidates for single electron production with momentump e 〉500 MeV/c were found in a sample of 66,000 primary interactions. This result places an upper limit of 2.5 μb on the cross section for singlee ± production at the 90% confidence level. The corresponding upper limit on the charmed particle production cross section in 14 μb. From the observation of 7 events producing ane +e− pair with mass, $$m_{e^ + e^ - } 〉 m_{\pi ^0 } $$ thee ±/π± ratio from this source is estimated to be (0.7±0.2)×10−4.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01573990