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http://142.54.178.187:9060/xmlui/handle/123456789/9369
Title: | SEARCH FOR DECAY MODES OF Ω− IN ψ (2S ) DATA |
Authors: | HUSSAIN, TALAB |
Keywords: | Natural Sciences |
Issue Date: | 2010 |
Publisher: | ntre for High Energy Physics University of the Punjab Lahore-54590, Pakistan |
Abstract: | ̄ ̄ ̄ A detailed analysis of ψ(2S) → Ω− Ω+ ( Ω− → ΛK − , Λ → pπ − , Ω+ → ΛK + and ̄ Λ → pπ + ) decay channel has been undertaken in this work. About 14 million ψ(2S) ̄ decays recorded by Beijing Spectrometer II (BESII) at Beijing Electron Positron ̄ Collider (BEPC), have been used. In earlier measurements of ψ(2S) → Ω− Ω+ , no ̄ significant signal of Ω− or Ω+ was found. Through a new technique of selecting ̄ events with one missing charge track also, we report a first evidence of Ω− and Ω+ signals with statistical significance levels of 5.3 σ and 4.6 σ, respectively. A branching ̄ fraction of ψ(2S) → Ω− Ω+ has been determined to be (3.21 ± 1.25 ± 0.97) × 10−5 . The errors are statistical and systematic, respectively. |
URI: | http://142.54.178.187:9060/xmlui/handle/123456789/9369 |
Appears in Collections: | Thesis |
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