CLEO was a general purpose particle detector at the Cornell Electron Storage Ring (CESR), and the name of the collaboration of physicists who operated the detector. The name CLEO is not an acronym; it is short for Cleopatra and was chosen to go with CESR (pronounced Caesar). CESR was a particle accelerator designed to collide electrons and positrons at a center-of-mass energy of approximately 10 GeV. The energy of the accelerator was chosen before the first three bottom quark Upsilon resonances were discovered between 9.4 GeV and 10.4 GeV in 1977. The fourth Υ resonance, the Υ(4S), was slightly above the threshold for, and therefore ideal for the study of, B meson production.
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| - CLEO (particle detector) (en)
- CLEO (detector de partículas) (pt)
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| - O detector CLEO era um detector de partículas para uso geral no Anel de Armazenamento de Elétrons de Cornell, CESR - "Cornell Electron Storage Ring" (em inglês) - e o nome da colaboração de físicos que operavam o detector. O nome CLEO não é um acrônimo; é abreviação para Cleópatra e foi escolhido para fazer um par com o CESR (pronuncia-se César em inglês)). O CLEO era um detector hermético que em todas as suas versões consistia em um sistema de rastreamento dentro de um ímã solenóide, um calorímetro, sistemas de identificação de partículas e um detector de múons. (pt)
- CLEO was a general purpose particle detector at the Cornell Electron Storage Ring (CESR), and the name of the collaboration of physicists who operated the detector. The name CLEO is not an acronym; it is short for Cleopatra and was chosen to go with CESR (pronounced Caesar). CESR was a particle accelerator designed to collide electrons and positrons at a center-of-mass energy of approximately 10 GeV. The energy of the accelerator was chosen before the first three bottom quark Upsilon resonances were discovered between 9.4 GeV and 10.4 GeV in 1977. The fourth Υ resonance, the Υ(4S), was slightly above the threshold for, and therefore ideal for the study of, B meson production. (en)
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| - CLEO was a general purpose particle detector at the Cornell Electron Storage Ring (CESR), and the name of the collaboration of physicists who operated the detector. The name CLEO is not an acronym; it is short for Cleopatra and was chosen to go with CESR (pronounced Caesar). CESR was a particle accelerator designed to collide electrons and positrons at a center-of-mass energy of approximately 10 GeV. The energy of the accelerator was chosen before the first three bottom quark Upsilon resonances were discovered between 9.4 GeV and 10.4 GeV in 1977. The fourth Υ resonance, the Υ(4S), was slightly above the threshold for, and therefore ideal for the study of, B meson production. CLEO was a hermetic detector that in all of its versions consisted of a tracking system inside a solenoid magnet, a calorimeter, particle identification systems, and a muon detector. The detector underwent five major upgrades over the course of its thirty-year lifetime, both to upgrade the capabilities of the detector and to optimize it for the study of B mesons. The CLEO I detector began collecting data in October 1979, and CLEO-c finished collecting data on March 3, 2008. CLEO initially measured the properties of the Υ(1–3S) resonances below the threshold for producing B mesons. Increasing amounts of accelerator time were spent at the Υ(4S) as the collaboration became more interested in the study of B mesons.Once the CUSB experiment was discontinued in the late 1980s, CLEO then spent most of its time at the Υ(4S) and measured many important properties of the B mesons.While CLEO was studying the B mesons, it was also able to measure the properties of D mesons and tau leptons, and discover many new charm hadrons. When the BaBar and Belle B factories began to collect large amounts of data in the early 2000s, CLEO was no longer able to make competitive measurements of B mesons. CLEO revisited the Υ(1-3S) resonances, then underwent its last upgrade to CLEO-c. CESR ran at lower energies and CLEO measured many properties of the ψ resonances and D mesons. CLEO was the longest running experiment in the history of particle physics. (en)
- O detector CLEO era um detector de partículas para uso geral no Anel de Armazenamento de Elétrons de Cornell, CESR - "Cornell Electron Storage Ring" (em inglês) - e o nome da colaboração de físicos que operavam o detector. O nome CLEO não é um acrônimo; é abreviação para Cleópatra e foi escolhido para fazer um par com o CESR (pronuncia-se César em inglês)). O CLEO era um detector hermético que em todas as suas versões consistia em um sistema de rastreamento dentro de um ímã solenóide, um calorímetro, sistemas de identificação de partículas e um detector de múons. (pt)
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