Variation of the relative yield of charged and neutral B mesons across the Upsilon(4S) resonance

Abstract

It is shown that the ratio of the production rates of the pairs (B+ B-) and (B0 anti-B0) should experience a substantial and rapid variation with energy within the width of the Upsilon(4S) resonance, crossing the value of one near the center of the resonance. This behavior is due to an interference of the rapidly changing with energy Breit-Wigner phase with the phase introduced in the wave function of charged mesons by their Coulomb interaction.

arXiv comment10 pages

References in corpus (3)

• Measurement of branching fractions for exclusive B decays to charmonium final states
• Measurement of the Relative Branching Fraction of ${\rm Y}(4S)$ to Charged and Neutral B-Meson Pairs
• Measurement of the Ratio of Branching Fractions of the Upsilon(4S) to Charged and Neutral B Mesons

Cited by in corpus (18)

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• On relativization of the Sommerfeld-Gamow-Sakharov factor
• No Sommerfeld resummation factor in e+e- -> ppbar ?
• Possible new resonance at the $D^{\ast }{\bar{D}}^{\ast }$ threshold in $e^{+}{e}^{-}$ annihilation
• Measurement of the Branching Fraction of Upsilon(4S) --> B0B0bar
• Isospin breaking in the yield of heavy meson pairs in e+e- annihilation near threshold
• Relative yield of charged and neutral heavy meson pairs in e^+ e^- annihilation near threshold
• Coulomb effects in the decays ${\rm Y}(4S)\to B\bar{B}$
• Invariant-mass spectrum of $\Lambda \bar{\Lambda }$ pair in the process $e^{+}{e}^{-}\to \varphi \Lambda \bar{\Lambda }$
• Effects of isospin violation in the $e^{+}{e}^{-}\to B^{(\ast )}{\bar{B}}^{(\ast )}$ cross sections
• Isospin in $B$ Decays and the $(B^0{\bar{B}}^0)/(B^{+}{B}^{-})$ Production Ratio
• Decay Rate Ratios of Upsilon(5S) to B Bbar Reactions
• Isospin violation in the yield of S-wave heavy meson pairs near threshold
• QED corrections to isospin-related decay rates of charged and neutral B mesons
• Charged-to-neutral meson yield ratio at $\psi (3770)$ and ${\rm Y}(4S)$ revisited