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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

Technical Report:

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.
Authors:
Baru, S E; Bejlin, M V; Blinov, A E [1] 
  1. and others
Publication Date:
Dec 31, 1991
Product Type:
Technical Report
Report Number:
BUDKERINP-91-110; IYaF-91-110.
Reference Number:
SCA: 662350; PA: AIX-25:007359; EDB-94:021959; ERA-19:007616; NTS-94:015123; SN: 94001126933
Resource Relation:
Other Information: PBD: 1991
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; MUON PAIRS; PAIR PRODUCTION; UPSILON-9460 MESONS; HADRONIC PARTICLE DECAY; BRANCHING RATIO; CROSS SECTIONS; ELECTRON-POSITRON INTERACTIONS; ENERGY DEPENDENCE; ERRORS; EXPERIMENTAL DATA; GEV RANGE 01-10; KAONS; PIONS; PROTONS; S STATES; 662350; DECAYS OF MESONS
OSTI ID:
10115899
Research Organizations:
AN SSSR, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki
Country of Origin:
Russian Federation
Language:
English
Other Identifying Numbers:
Other: ON: DE94611207; TRN: RU9305294007359
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
18 p.
Announcement Date:
Jun 30, 2005

Technical Report:

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}
}