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Precision determination of the D0 mass.
C Cawlfield1, B I Eisenstein, I Karliner
1University of Illinois, Urbana-Champaign, Illinois 61801, USA.
Physical Review Letters
|March 16, 2007
Summary
Precision measurements of the D0 meson mass were performed using e+e- annihilation data. This study provides a well-constrained determination of the binding energy for the X(3872) molecule.
Area of Science:
- Particle Physics
- Hadron Spectroscopy
- Quantum Chromodynamics
Background:
- The D0 meson is a fundamental particle in particle physics.
- Understanding the properties of exotic hadrons like the X(3872) molecule is crucial for testing quantum chromodynamics.
- Previous measurements of the D0 meson mass have varying precision.
Purpose of the Study:
- To perform a precision measurement of the D0 meson mass.
- To constrain the binding energy of the proposed D0D*0 molecule, X(3872).
Main Methods:
- Utilized approximately 281 pb(-1) of e+e- annihilation data collected with the CLEO-c detector at the psi(3770) resonance.
- Analyzed the exclusive decay channel D0-->K_{S}phi for mass determination.
Main Results:
- The D0 meson mass was determined to be M(D0)=1864.847+/-0.150(stat)+/-0.095(syst) MeV.
- This result corresponds to M(D0D*0)=3871.81+/-0.36 MeV.
- The binding energy of the X(3872) molecule was constrained to Eb=0.6+/-0.6 MeV.
Conclusions:
- The precision measurement of the D0 meson mass provides a crucial input for understanding exotic hadrons.
- The constrained binding energy of the X(3872) molecule offers insights into its molecular nature.
- This study contributes to the ongoing efforts to unravel the complexities of the strong nuclear force.
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