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The Properties of Semileptonic Decays of Charmed D Mesons


Coffman, Daniel Mark (1987) The Properties of Semileptonic Decays of Charmed D Mesons. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/4be7-sc20.


The MARK III collaboration has collected a large sample of D mesons produced at the Ψ(3770) resonance. The reconstruction of several thousand hadronic D decays makes possible for the first time the reconstruction of exclusive semileptonic D decays. Absolute branching ratios are measured for the nine decays D0 → K- e+ νe, D0 → K- π0 e+ νe, D0 → K̅0 π- e+ νe, D+ → K̅0 e+ νe, D+ → K- π+ e+ νe, D0 → π- e+ νe, D0 → K- μ+ νμ, D0 → K̅0 π- μ+ νμ, and D+ → K̅0 μ+ νμ. The sums of the exclusive branching ratios are in good agreement with the inclusive semileptonic branching ratios measured by the MARK III. The rate of the Cabibbo-suppressed decays is consistent with the predicted rate. The contribution of the K*(892) to the K-π invariant mass spectrum for decays of the type D → K π e+ νe is found to be about 55%. The vector form factor in the decays D0 → K- e+ νe and D0 → K- μ+ νμ is measured and found to be consistent with a simple pole form.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Hitlin, David G.
Thesis Committee:
  • Hitlin, David G. (chair)
  • Wise, Mark B.
  • Peck, Charles W.
  • Boehm, Felix H.
Defense Date:8 December 1986
Record Number:CaltechTHESIS:08302019-143806077
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11781
Deposited By: Mel Ray
Deposited On:03 Sep 2019 20:26
Last Modified:19 Apr 2021 22:31

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