Extracting the light quark mass ratio m(u)/m(d) from bottomonia transitions |
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Authors: | Guo Feng-Kun Hanhart Christoph Meissner Ulf-G |
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Institution: | Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425 Jülich, Germany. |
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Abstract: | We propose a new method to extract the light quark mass ratio m(u)/m(d) using the Υ(4S)→h(b)π?(η) bottomonia transitions. The decay amplitudes are dominated by the light quark mass differences, and the corrections from other effects are rather small, allowing for a precise extraction. We also discuss how to reduce the theoretical uncertainty with the help of future experiments. As a by-product, we show that the decay Υ(4S)→h(b)η is expected to be a nice channel for searching for the h(b) state. |
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