Abstract
In the experiment with e{sup +}e{sup -}-beams performed at the VEPP-4 storage ring with the MD-1 detector have been measured B{sub {mu}{mu}}, the branching ratio for the decay of {upsilon}(1S) state into {mu}{sup +}{mu}{sup -}B{sub {mu}{mu}}=(2.12+0.20+0.10)% is obtained. It is shown that the continuum and resonance interference should be taken into account. For the first time the upper limits on the branching ratio for the decays {upsilon}{yields}{pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}, pp-bar have been obtained: Br({upsilon}{yields}{pi}{sup +}{pi}{sup -})<5x10{sup -4}, Br({upsilon}{yields}K{sup +}K{sup -})<5x10{sup -4}, Br({upsilon}{yields}pp-bar)<5x10{sup -4}. 26 refs.; 6 figs.; 7 tabs.
Citation Formats
Baru, S E, Bejlin, M V, and Blinov, A E.
Measurement of the branching ratio for {Upsilon}(1s) state into {mu}{sup +}{mu}{sup -} and search for decays {upsilon}(1s){yields}{pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}, pp-bar.
Russian Federation: N. p.,
1991.
Web.
Baru, S E, Bejlin, M V, & Blinov, A E.
Measurement of the branching ratio for {Upsilon}(1s) state into {mu}{sup +}{mu}{sup -} and search for decays {upsilon}(1s){yields}{pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}, pp-bar.
Russian Federation.
Baru, S E, Bejlin, M V, and Blinov, A E.
1991.
"Measurement of the branching ratio for {Upsilon}(1s) state into {mu}{sup +}{mu}{sup -} and search for decays {upsilon}(1s){yields}{pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}, pp-bar."
Russian Federation.
@misc{etde_10115899,
title = {Measurement of the branching ratio for {Upsilon}(1s) state into {mu}{sup +}{mu}{sup -} and search for decays {upsilon}(1s){yields}{pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}, pp-bar}
author = {Baru, S E, Bejlin, M V, and Blinov, A E}
abstractNote = {In the experiment with e{sup +}e{sup -}-beams performed at the VEPP-4 storage ring with the MD-1 detector have been measured B{sub {mu}{mu}}, the branching ratio for the decay of {upsilon}(1S) state into {mu}{sup +}{mu}{sup -}B{sub {mu}{mu}}=(2.12+0.20+0.10)% is obtained. It is shown that the continuum and resonance interference should be taken into account. For the first time the upper limits on the branching ratio for the decays {upsilon}{yields}{pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}, pp-bar have been obtained: Br({upsilon}{yields}{pi}{sup +}{pi}{sup -})<5x10{sup -4}, Br({upsilon}{yields}K{sup +}K{sup -})<5x10{sup -4}, Br({upsilon}{yields}pp-bar)<5x10{sup -4}. 26 refs.; 6 figs.; 7 tabs.}
place = {Russian Federation}
year = {1991}
month = {Dec}
}
title = {Measurement of the branching ratio for {Upsilon}(1s) state into {mu}{sup +}{mu}{sup -} and search for decays {upsilon}(1s){yields}{pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}, pp-bar}
author = {Baru, S E, Bejlin, M V, and Blinov, A E}
abstractNote = {In the experiment with e{sup +}e{sup -}-beams performed at the VEPP-4 storage ring with the MD-1 detector have been measured B{sub {mu}{mu}}, the branching ratio for the decay of {upsilon}(1S) state into {mu}{sup +}{mu}{sup -}B{sub {mu}{mu}}=(2.12+0.20+0.10)% is obtained. It is shown that the continuum and resonance interference should be taken into account. For the first time the upper limits on the branching ratio for the decays {upsilon}{yields}{pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}, pp-bar have been obtained: Br({upsilon}{yields}{pi}{sup +}{pi}{sup -})<5x10{sup -4}, Br({upsilon}{yields}K{sup +}K{sup -})<5x10{sup -4}, Br({upsilon}{yields}pp-bar)<5x10{sup -4}. 26 refs.; 6 figs.; 7 tabs.}
place = {Russian Federation}
year = {1991}
month = {Dec}
}