Abstract
The relative decay probability B(φ → ηγ) = (1.259 ± 0.030 ± 0.059)% in the decay channel η → π+π-π0 has been measured in an experiment using a spherical neutral detector in the VEPP-2M electron-positron storage ring. The result agrees with the tabulated value and with measurements of this probability using the spherical neutral detector in other η-meson decay channels.
Original language | English |
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Pages (from-to) | 17-23 |
Number of pages | 7 |
Journal | Journal of Experimental and Theoretical Physics |
Volume | 90 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2000 |
Externally published | Yes |
Funding
agrees with the world average of 0.324 – 0.007 and is of comparable accuracy. From the sum of three measurements using the SND detector in different h -meson decay channels we can also obtain B(f ee)B(f hg ) = (3.848 – 0.036 – 0.070) · 10–6, B(f hg ) = (1.287 – 0.012 – 0.042)%, which is the most accurate measurement made using a single detector. This work was supported by the STP Integration Fund (Grant no. 274) and by the Russian Foundation for Basic Research (Grants nos. 96-15-96327, 97-02-18563, and 99-02-17155).
Funders | Funder number |
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Russian Foundation for Basic Research | 96-15-96327, 97-02-18563, 99-02-17155 |
STP Integration Fund | 274 |