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- W2227902585 abstract "We have studied in some detail the possibility of observing CP violation in the B-meson system using asymmetric-energy ${e}^{+}$${e}^{mathrm{ensuremath{-}}}$ beams colliding with a center-of-mass energy corresponding to the ensuremath{Upsilon}(4S) mass. If a CP eigenstate is detected in conjunction with an identified ${B}^{0}$ or B${ifmmodebarelsetextasciimacronfi{}}^{0}$, the distribution of the flight path between decays contains a term which provides a measurement of CP violation, as discussed in this paper. The moving B mesons in the laboratory make this flight-path measurement possible. The use of the ensuremath{Upsilon}(4S) provides the largest BBifmmodebarelsetextasciimacronfi{} cross section in ${e}^{+}$${e}^{mathrm{ensuremath{-}}}$ production, other than from the ${Z}^{0}$, and allows excellent background rejection because the B is monoenergetic in the center-of-mass frame. Since there are no extra fragmentation products accompanying the BBifmmodebarelsetextasciimacronfi{} in the event, very simple tagging strategies can be used to separate ${B}^{0}$ from B${ifmmodebarelsetextasciimacronfi{}}^{0}$ decays, providing a tagging efficiency close to 50%. The CP eigenstates studied in this paper are J/ensuremath{psi}+${K}_{S}^{0}$, J/ensuremath{psi}+${K}^{mathrm{*}0}$ and ensuremath{psi}'+${K}_{S}^{0}$. Given an adequate detector, the integrated luminosity needed to observe CP violation in the standard model is expected to be about 2ifmmodetimeselsetexttimesfi{}${10}^{40}$ ${mathrm{cm}}^{mathrm{ensuremath{-}}2}$ or ${10}^{7}$ produced ${B}^{0}$B${ifmmodebarelsetextasciimacronfi{}}^{0}$ pairs." @default.
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- W2227902585 date "1989-03-01" @default.
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- W2227902585 title "MeasuringCPviolation in theB0B¯0system with asymmetric-energye+e−beams" @default.
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- W2227902585 doi "https://doi.org/10.1103/physrevd.39.1283" @default.
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