A high precision measurement of the ϒ, ϒ′ and ϒ″-meson masses

A Artamonov ,S.E Baru,Yu.I Eidelman,V.R Groshiev,A.I Yurkov,A.G Shamov,G.M Tumaikin,A.N Skrinsky,A P Onuchin ,A D Bukin ,S I Mishnev ,S Klimenko ,Yu A Tikhonov ,A E Blinov ,I.ya Protopopov ,A Bondar ,V Sidorov ,Vladimir Petrov ,N I Inozemtsev ,В А Киселев ,С.а Никитин ,Э А Купер ,A Undrus ,V I Telnov ,А.і Воробйов ,A Temnykh ,V.s Panin ,V.a Tayursky ,A Zholents

doi:10.1016/0370-2693(84)90243-0

A high precision measurement of the ϒ, ϒ′ and ϒ″-meson masses

A Artamonov , S.E Baru + Show 27 more

https://doi.org/10.1016/0370-2693(84)90243-0

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Journal: Physics Letters B	Publication Date: Mar 1, 1984
Citations: 29

Affiliation: Institute of Nuclear Physics, 630090 Novosibirsk, USSR

#Resonance Depolarization Method #MD-1 Detector + Show 8 more

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Abstract

An experiment has been performed at the storage ring VEPP-4 using the MD-1 detector. The resonance depolarization method has been employed for the absolute calibration of the beam energy. This has allowed the accuracy of the mass measurement to be improved by a factor of ten. The following mass values of ϒ, ϒ′ and ϒ″ -mesons have been obtained: M( ϒ)=9460.6±0.4 MeV, M( ϒ′)=10023.8±0.5 MeV, M( ϒ″)=10355.5±0.5 MeV.

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