Measurements of the mass and width of the using the decay
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American Physical Society
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Abstract
The mass and width of the lowest-lying -wave spin singlet charmonium state, the , are measured using a data sample of decays collected with the BESIII detector at the BEPCII storage ring. We use a model that incorporates full interference between the signal reaction, , and a nonresonant radiative background to describe the line shape of the successfully. We measure the mass to be and the total width to be , where the first errors are statistical and the second are systematic.
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Charmonium, Data sample, Line shape, Nonresonant, Spin singlets, Atomic physics, Physics, Systematic errors
Citation
Ablikim, M., Achasov, M. N., Alberto, D., Ambrose, D. J., An, F. F., An, Q., . . . Zuo, J. X. (2012). Measurements of the mass and width of the using the decay . Physical Review Letters, 108(22), 222002. http://dx.doi.org/10.1103/PhysRevLett.108.222002
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© 2012 American Physical Society.
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Article