Groom, Donald Eugene (1965) Lambda polarization at 90 degrees in (positive kaon, lambda-hyperon) photoproduction. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-05162003-104732
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The polarization of [lambda] hyperons in the reaction [lambda] + p [...]K[superscript +] + [lambda] has been measured, using the Caltech synchrotron. The measurements were made at 90[degrees] in the c. m. system, at laboratory photon energies of 1100 MeV, 1200 MeV, and 1300 MeV. Protons from the asymmetric decay of the [lambda] were detected by counters placed, symmetrically above and below the plane defined by the photon beam and the mean kaon momentum. Kaons were detected in a 16 to 18 counter range telescope. If preliminary logic was satisfied, all pulse heights from counters in the telescope were digitized and recorded on paper tape, along with relevant coincidence information. A detailed fit to the Bragg curve was made in a digital computer to establish the kaon identification. The results were P[lambda] = +0.34 [...] 0.09 at 1100 MeV, + 0.30 [...] 0.07 at 1200 MeV, and + 0.08 [...] 0.07 at 1300 MeV, where P[lambda] is measured in the [...] direction. These data, together with those of other groups, add support to the suggestion that the effects of the third [pi]N resonance are evident in K[lambda] photoproduction.
|Item Type:||Thesis (Dissertation (Ph.D.))|
|Degree Grantor:||California Institute of Technology|
|Division:||Physics, Mathematics and Astronomy|
|Thesis Availability:||Public (worldwide access)|
|Defense Date:||25 May 1965|
|Default Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Imported from ETD-db|
|Deposited On:||16 May 2003|
|Last Modified:||26 Dec 2012 02:42|
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