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Photoproduction of positive K mesons in hydrogen

Citation

Donoho, Paul Leighton (1958) Photoproduction of positive K mesons in hydrogen. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-10072004-134210

Abstract

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In the experiment described here K+ mesons produced in a liquid hydrogen target by the 1100 Mev bremsstrahlung from the California Institute of Technology Synchrotron have been observed. It has been found that the K+ mesons are produced in association with [...] hyperons, as required by the law of associated production, thus confirming the validity of this law in electromagnetic interactions. The K+ mesons are momentum analyzed in a magnetic spectrometer and identified by their energy loss in three scintillation counters, the very large background due to pions and protons being virtually eliminated by means of a time-of-flight velocity measurement. The differential cross section for the reaction [...] has been measured at photon energies of 960 Mev, 1000 Mev, and 1060 Mev at various K+ meson laboratory angles between 15 degrees and 45 degrees. This cross section shows little variation with photon energy between 960 Mev and 1060 Mev. There is a decrease in the cross section at backward center-of-momentum angles at both 1000 Mev and 1060 Mev. The magnitude of the K - [...] coupling constant estimated from these measurements is smaller by a factor of about five than the pion-nucleon coupling constant, if the K+ meson is assumed to be pseudoscalar.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Walker, Robert Lee
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1958
Record Number:CaltechETD:etd-10072004-134210
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-10072004-134210
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3969
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:07 Oct 2004
Last Modified:26 Dec 2012 03:04

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