pi+ / pi- - p and p-p elastic scattering

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When experiment 7 was designed they proposed to do {pi}{sup {+-}}-p and p-p elastic scattering. While we were obviously aware of the interest in doing K{sup {+-}}-p and {bar p}-p scattering they felt unsure of having suitable Cerenkov counters available to clearly separate the particles at the time we would run. As a result we did not propose to measure these. In the past 3 months two developments have changed the situation. First we have built and tested a threshold counter for use at NAL. From that test we have concluded that the quantum efficiency of the new RCA 31000M ... continued below

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30 pages

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Creator: Unknown. April 1, 1971.

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When experiment 7 was designed they proposed to do {pi}{sup {+-}}-p and p-p elastic scattering. While we were obviously aware of the interest in doing K{sup {+-}}-p and {bar p}-p scattering they felt unsure of having suitable Cerenkov counters available to clearly separate the particles at the time we would run. As a result we did not propose to measure these. In the past 3 months two developments have changed the situation. First we have built and tested a threshold counter for use at NAL. From that test we have concluded that the quantum efficiency of the new RCA 31000M phototubes is a factor of 2 higher than that of tubes previously available. Second, the total cross section experiment has definitely been assigned to run before us and it will supply some of the Crenkov counters needed. We are therefore confidence that we can run {pi}{sup {+-}}, K{sup {+-}} and p{sup {+-}} differential cross sections. We propose to take data on all three reactions simultaneously so that we are not requesting additional accelerator time. This will mean that the statistical accuracy of K{sup {+-}}-p and {bar p}-p will be poor at the larger t values in the experiment. However the small t data will be interesting. The additional effort needed to run these other reactions is minimal since the Crenkov counters will be in operation anyway, and they normally record the condition of each Cerenkov counter on magnetic tape with their other data. In addition we will be recording data on N8 resonance production as a function of t. To take this data simultaneously is unavoidable. To what extent the data will be of sufficient accuracy and sufficiently free of background to be physically interesting we cannot predict because of the unknown size of the cross section. The same is true of the {pi}{sup +}+p {yields} K{sup +}+{Sigma}{sup +} reaction where at best we will get a rough size for the reaction. We would like to emphasize that we are not requesting additional accelerator time. The apparatus will be available if someone wants to take higher statistics K{sup {+-}} and {bar p} data. We only feel that data which is so easily obtained and is of considerable physical interest should not be thrown away.

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30 pages

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  • Report No.: FERMILAB-PROPOSAL-0007
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/897150 | External Link
  • Office of Scientific & Technical Information Report Number: 897150
  • Archival Resource Key: ark:/67531/metadc879310

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • April 1, 1971

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 30, 2016, 4:46 p.m.

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pi+ / pi- - p and p-p elastic scattering, report, April 1, 1971; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc879310/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.