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arXiv · hep-ph/9704357

B to eta' + X and The QCD Anomaly

David Atwood·Amarjit Soni
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Abstract

Mechanisms for the observed large $Br(B \to η' +X_s)$ are examined. We propose that the dominant fraction of the $B \to η' +X_s$ rate is due mainly to $b \to s g^*$, where $g^*$ is an off-shell gluon, followed by $g^* \to gη'$ via the anomalous coupling of the $η'$ to two gluons. The calculated rate for $B \to η'+X_s$ is in rough accord with experiment using a fairly constant glue-glue-$η'$ form factor. This behavior of the form factor may be indicative of glueball dominance of the channel. Searches via the modes $η' h^+h^-$ ($h=π$ or $K$) may be worthwhile. Charmonia contributions [i.e $B \to η_c, ψ(\to η'+X) +X_s$] can only account for at most 20% of the central value of the signal. Implications for $B \to η' +X_d$ and for the corresponding $η$ modes are also given.

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David Atwood, Amarjit Soni. 1997-04-18. B to eta' + X and The QCD Anomaly. https://doi.org/10.1016/s0370-2693(97)00592-3

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