Measurements of the mass difference m(B0) − m(B+) and the energy dependence of the cross-section ratio $$\sigma ({e}^{+}{e}^{-}\to {B}^{0}{\overline{B} }^{0})/\sigma ({e}^{+}{e}^{-}\to {B}^{+}{B}^{-})$$ at Belle and Belle II
M. Abumusabh, I. Adachi, L. Aggarwal, H. Ahmed et autres
A bstract Using data samples collected by the Belle and Belle II experiments at the Υ(4 S ) resonance with integrated luminosities of 571 fb − 1 and 365 fb − 1 , respectively, we measure the pseudoscalar B -meson mass difference …
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Journal of High Energy Physics