K.W. Brown

Observation of prompt single muon production by hadrons at Fermilab

Talk given by M. H. Shaevitz at the Third International Conference at Vanderbilt University, March 3 to 6, 1978, on New Results in High Energy Physics. In an experiment at Fermilb, prompt single and dimuon production by 400-GeV protons in a large acceptance detector. A substantial prompt single muon rate was observed in the region 0.7 .. charm + anything of approximately 40 ..mu..b. 8 references.

Evidence for prompt single muon production in 400 GeV proton interactions

We have investigated the origin of prompt muon production in the interaction of 400 GeV protons in a steel target. Using a variable density target and a large acceptance muon identifier, we have observed a substantial signal of prompt single muon for the kinematic region XF?0 and 0.8≲pt≲1.5 GeV. Assuming that the major source is charmed D? production, a model dependent calculation yields σ (pp→charm) of about 40μb.

A Measurement of the Neutral Current Coupling in Neutrino Inclusive Reactions

Within the last few years several experiments have reported evidence for the existence of the neutral current inclusive reactions [1]

Observation of Trimuon Production by Neutrinos.

\begin{array}{l} {v_{\mu }} + N to {v_{\mu }} + X \\ {\overline v _{\mu }} + N \to {\overline v _{\mu }} + X. \\ \end{array}

Measurements ofνμNandν¯μNCharged-Current Total Cross Sections

The coupling structure of these reactions which could be any combination of scalar, pseudo-scalar, vector, axial vector, or tensor is not known a priori. It is now a matter of experimentation to reveal the correct structure of these reactions.

Observation of prompt single-muon production by 400-GeV protons

We have investigated a sample of high energy neutrino and antineutrino charged current events taken in September-October 1974. The experiment was performed using the Caltech-Fermilab apparatus [1] and a narrow band neutrino beam [2]. The data were taken simultaneously with the neutral current data also reported at this conference. Due to the requirements of the neutral current measurements, this experiment was run using short spill (~ 1 msec) extraction from the accelerator. At present, the monitoring instrumentation at Fermilab is such that the flux of the narrow band beam can only be determined during long spill (~ 1 sec) running. Therefore, no external normalization is available for this data.