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- W2023478102 abstract "H.~Yamamoto has proposed employing $B$ mesons produced in conjunction with a single charged pion at an $Upsilon$ resonance for studies of CP violation in the neutral $B$ meson system at a symmetric $e^+$-$e^-$ collider. The sign of the charged pion would tag the neutral $B$ meson. We estimate this branching ratio, employing the heavy meson chiral effective field theory. We find a negligible branching ratio to $B B^{pm} pi^{mp}$ at the $Upsilon$(5S) and a branching ratio of only a few percent at the $Upsilon$(6S). However, if nonresonant studies of neutral $B$ mesons should prove feasible, Yamamoto's proposal could be a good method for tagging neutral $B$'s for the study of CP violation at a symmetric collider. We also explore the possibility of studying $B_s$ at the $Upsilon$(5S). The rate is low but depends sensitively on the precise value of the mass of the $B_s$. The background we compute is comparable to the rate at the largest allowed value of the $B_s$ mass. Finally, we discuss the extraction of the axial pion coupling to $B$ mesons from measurement of the $Bbbarpi$ branching fraction in a restricted region of phase space, where chiral perturbation theory should work well." @default.
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- W2023478102 title "The rate for e+e− → BB± π∓ and its implications for the study of CP violation, Bs identification, and the study of B meson chiral perturbation theory" @default.
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- W2023478102 doi "https://doi.org/10.1016/0550-3213(93)90426-p" @default.
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