NAL 15 foot hydrogen bubble chamber proposal diffraction dissociation of neutrons on hydrogen

Technical Report · Wed May 01 04:00:00 EDT 1974

DOI:https://doi.org/10.2172/1898871· OSTI ID:1898871

Chapman, J. ^[1]; Diamond, R. ^[1]; Seidl, A. ^[1]; Vander Velde, J. ^[1]

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1. Univ. of Michigan, Ann Arbor, MI (United States)

We propose to measure the s and t dependence and decay angular distributions of' certain exclusive final states produced in $np$ interactions. The principal reactions of' interest are $$np→pπ^{-}p$$ and $$np→pπ^{-}π^{+}π^{-}p$$. These reactions, which are principal contributors to diffractive dissociation of' the nucleon, will be studied from ~50 to ~250 GeV/c, assuming a 300 GeV/c primary proton beam. The bubble chamber is particularly well suited to study certain quantities of theoretical interest such as the low t behavior and decay angular distributions of the diffractively produced system. The long path length available in the 15 foot bubble chamber is particularly advantageous both for obtaining high statistics and for measuring the momentum of high momentum particles. We request a 100,000 picture exposure of' the 15 foot bubble chamber with ~2 x 10⁴ protons on a production target (see sections II and III). This would yield ~250,000 inelastic interactions, ~2400 $$np→pπ^{-}p$$ events, and ~4000 $$np→pπ^{-}π^{+}π^{-}p$$ events in an 8 foot fiducial volume.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); US Atomic Energy Commission (AEC)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1898871
• Report Number(s): FERMILAB-PROPOSAL-0303; oai:inspirehep.net:97345
• Country of Publication: United States
• Language: English

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43 PARTICLE ACCELERATORS