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The Decay Properties of the ψ(3770)


Zhu, Yanong (1989) The Decay Properties of the ψ(3770). Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/2c5y-sq13.


The decays of the ψ(3770) resonance to final states that do not contain charmed D mesons are measured for the first time. Using a sample of 9.3pb⁻¹ of e⁺e⁻ annihilations at √s = 3.77 GeV, collected with the Mark III detector at SPEAR, we have measured the branching ratio for the decays ψ(3770) → J/ψπ⁺π⁻ and γχJ. These branching ratios together with the electronic widths of the ψ(3685) and ψ(3770) are used to determine the mixing angle between the 2³S₁ and 1³D₁ Charmonium states and are compared with a number of predictions. In addition, evidence is found for other non-DD̅ hadronic final states, such as 3π, 4π, and 5π, as well as η2π, η4π, p̅p2π and p̅p3π.

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.
  • Porter, Frank C.
  • Whaling, Ward
Defense Date:19 July 1988
Record Number:CaltechTHESIS:10252013-112507352
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8010
Deposited By: Dan Anguka
Deposited On:25 Oct 2013 21:24
Last Modified:12 Jan 2022 00:44

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