A more careful estimate of the charm content of eta'

1999/03/12 by Mohammad Ahmady, M. R. Ahmady, Ahmady, M. R. +2
Arts and Humanities · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Language, Linguistics, Cultural Analysis #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9903335

8 pages, latex, 2 postscript figures included

openalex publication_date 1999/03/12 · arxiv created 2000/03/09 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We estimate the quantity |f_eta'^(c)| which is associated with the charm content of eta' meson from the experimentally known ratio R=B(psi ->eta' gamma )/B(psi ->eta_c gamma). It is shown that due to the off-shellness of the c c component of eta', which has been overlooked so far, f_eta'^(c) is further suppressed. Assuming that psi ->eta' gamma decay is dominated by psi ->eta_c transition, we obtain |f_eta'^(c)| = 2.4 MeV which could imply that the (b -> c cs) mechanism does not play a major role in the B -> K eta' decay mode.

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