What is the CKM element for J psi and phi meson

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SUMMARY

The discussion focuses on the calculation of the CKM (Cabibbo-Kobayashi-Maskawa) matrix elements relevant to B0s decays, specifically in relation to the J/psi and phi mesons. The user successfully calculated branching fractions for various decays, including B0s to Ds-K+, but seeks clarification on the appropriate CKM matrix value for J/psi, which is a charm-anticharm meson. The branching fraction for B0s decaying to Ds- and pi+ is noted as 3x10^-3, indicating the need for precise CKM values for accurate branching fraction calculations.

PREREQUISITES
  • Understanding of CKM matrix elements
  • Knowledge of particle decay processes
  • Familiarity with branching fractions in particle physics
  • Basic concepts of charm and anti-charm mesons
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  • Research the specific CKM matrix values for charm quark transitions
  • Study the decay processes of B mesons in detail
  • Learn about the properties and significance of the J/psi meson
  • Explore the implications of branching fractions in particle physics experiments
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Particle physicists, researchers in quantum chromodynamics, and students studying meson decays and CKM matrix applications.

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Homework Statement
Estimate the branching fraction of B0s to J/psi and phi
Relevant Equations
the ckm matrix
I am given the ckm matrix and told that B0s decay to Ds- and pi+ with a branching frcation of 3x10-3. I am then asked to find the branching fraction for other decays. I have done this easily enough for decays like B0s to Ds-K+ by using the ckm matrix elements. However the J/psi meson is a charm anticharm meson. Im just not to sure what value to take from the CKM matrix and would love some help!
 

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