The Lifetime and Decay Modes of Negative K Mesons Page: 7 of 55
This thesis or dissertation is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
THE LIFETIME AND DECAY MODES OF NEGATIVE K MESONS
Norris A. Nickols
University of California
A large emulsion stack exposed to an enriched K -meson.beam
analyzed.by 180-deg magnetic-bending has been used to measure the
mean lifetime and decay branching ratios of K mesons. In a. systematic
study of 2582 K mesons, 86 events in flight with no stable prong, blob,
or Auger electron were observed. Of these, 48 had one lightly
ionizing secondary and 38 had no visible secondary. No ' -were
observed. -Space angles were measured and momenta of secondaries-
were determined from their ranges or -from blob-density measurements.
The residual range accurately-determined the K -meson momentum at
the decay point, because the 180-deg. bending provided high momentum
resolution. A probability analysis was used to calculate the relative
populations of the various decay modes-and of nuclear interactions
that simulate decays. ..Independent estimates of upper and lower limits
to the number of decays present were made.- The percent branching
ratios-for the various decay modes measured are as follows:-
K (56.5 + 7.3), K w (9.5 $ 4.3), K2 (26.3 6 E.6), K3 (2.8 + 2.4),
K~ (4.9 3.2), 'r (0.0 + 2.1). The K--meson mean lifetime is
e3 +0.22 -8
1.25 -0.17 X 10 sec.
Here’s what’s next.
This document can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Thesis Or Dissertation.
Nickols, N. A. The Lifetime and Decay Modes of Negative K Mesons, thesis or dissertation, September 1, 1959; United States. (https://digital.library.unt.edu/ark:/67531/metadc1015953/m1/7/: accessed April 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.