Please use this identifier to cite or link to this item: http://prr.hec.gov.pk/jspui/handle/123456789/715
Title: SEARCH FOR DECAY MODES OF Ω− IN ψ (2S ) DATA
Authors: HUSSAIN, TALAB
Keywords: Natural Sciences
Physics
Modern physics
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://prr.hec.gov.pk/jspui/handle/123456789//715
Appears in Collections:PhD Thesis of All Public / Private Sector Universities / DAIs.

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