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- W2076672912 abstract "The sum of the CP-violating asymmetries $A({ensuremath{Lambda}}_{ensuremath{-}}^{0})$ and $A({ensuremath{Xi}}_{ensuremath{-}}^{ensuremath{-}})$ in hyperon nonleptonic decays is presently being measured by the E871 experiment. We evaluate contributions to the asymmetries induced by chromomagnetic-penguin operators, whose coefficients can be enhanced in certain models of new physics. Incorporating recent information on the strong phases in $stackrel{ensuremath{rightarrow}}{ensuremath{Xi}}ensuremath{Lambda}ensuremath{pi}$ decay, we show that new-physics contributions to the two asymmetries can be comparable. We explore how the upcoming results of E871 may constrain the coefficients of the operators. We find that its preliminary measurement is already better than the $ensuremath{epsilon}$ parameter of $Kensuremath{-}overline{K}$ mixing in bounding the parity-conserving contributions." @default.
- W2076672912 created "2016-06-24" @default.
- W2076672912 creator A5077638499 @default.
- W2076672912 date "2004-04-16" @default.
- W2076672912 modified "2023-10-14" @default.
- W2076672912 title "New physics and<i>CP</i>violation in hyperon nonleptonic decays" @default.
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- W2076672912 doi "https://doi.org/10.1103/physrevd.69.076008" @default.
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