Journal
PHYSICAL REVIEW LETTERS
Volume 101, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.182002
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Funding
- A. P. Sloan Foundation
- National Science Foundation
- U. S. Department of Energy
- Natural Sciences and Engineering Research Council of Canada
- U. K. Science and Technology Facilities Council
- Science and Technology Facilities Council [PPA/A/S/2003/00461/2, PP/E002722/1, ST/G502412/1] Funding Source: researchfish
- STFC [ST/G502412/1, PP/E002722/1] Funding Source: UKRI
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We measure the mass of the eta(') meson using psi(2S)->pi(+)pi(-)J/psi, J/psi ->gamma eta(') events acquired with the CLEO-c detector operating at the CESR e(+)e(-) collider. Using three decay modes, eta(')->rho(0)gamma, eta(')->pi(+)pi(-)eta with eta ->gamma gamma, and eta(')->pi(+)pi(-)eta with eta ->pi(+)pi(-)pi(0), we find M-eta(')=957.793 +/- 0.054 +/- 0.036 MeV, in which the uncertainties are statistical and systematic, respectively. This result is consistent with but substantially more precise than the current world average.
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