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An estimation of non-valence contributions to form factors of heavy-light mesons

We study the influence of non-valence quark-pair contributions in weak transition form factors of heavy-light mesons. Form factors are first calculated for spacelike momentum transfers in a reference frame where such contributions are suppressed. Analytic continuation to the timelike region and a comparison with the direct decay calculation, done with pure valence degrees of freedom, provides an estimate of the role that quark-pair contributions may play. We use the point form of relativistic quantum mechanics, which is particularly useful when treating heavy-light systems.

preprint2022arXivOpen access
María Gómez-RochaOliver HegerWolfgang Schweiger
hep-ph
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María Gómez-RochaOliver HegerWolfgang Schweiger

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