"The yield of muon pairs decreased rapidly from 1 GeV to the kinematic limit of nearly 6 GeV with the exception of a curious shoulder near 3GeV. The measurement of muons was by range as determined by liquid and plastic scintillation counters interspersed with steel shielding. Each angular bin (there were 18) had four range bins, and for two muons this made a total of only 5000 mass bins into which to sort the data. Multiple scattering in the minimum of 10 feet of steel
made finer binning useless. Thus we could only note that "Indeed, in the mass region near 3.5 GeV, the observed spectrum may be reproduced by a composite of a resonance and a steeper continuum." This 1968-1969 experiment was repeated in 1974 by Aubert et al. (1974), with a
magnetic spectrometer based upon multiwire proportional chambers. The shoulder was refined by the superior resolution into a towering peak [see Figure] called the "J" particle."
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- Sun's Impact On Climate Is Greater In Cool Periods
- Energy-Space Photography Captures Light Behaving As A Wave And A Particle
- The Law has Failed, Not Forensic Science
- The Real Meaning Of The Blue Black White Gold Dress
- Cats Use Sight Over Smell When Finding Food
- How Mr. Spock Changed Our Perception Of Science
- Francis Halzen On Cosmogenic Neutrinos
- "Presumably, John Collins refers to “Predicting Erroneous Convictions,” by Jon B. Gould and..."
- "David:My first, gut reaction was my math sure looks fishy :-) Small m is a scalar, small..."
- "they probably play important roles in microbial communities and ecosystems. But we don't yet fully..."
- "initiatives from which Kafadar, Mazza, and others in similar positions stand to enjoy considerable..."
- "This is complete nonsense. I suppose it sells for the Joe Mercola audience and other anti-science..."