Isospin analysis of BâDâD¯K and the absence of the Zc(3900) in B decays
We study the isospin amplitudes in the exclusive B to DâD¯K decay process and fit the available Dâ0D¯0 invariant mass distributions near threshold. The analysis demonstrates that the production of the isospin triplet DâD¯ state is highly suppressed compared to the isospin singlet one. That explai...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-12-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317308614 |
| Summary: | We study the isospin amplitudes in the exclusive B to DâD¯K decay process and fit the available Dâ0D¯0 invariant mass distributions near threshold. The analysis demonstrates that the production of the isospin triplet DâD¯ state is highly suppressed compared to the isospin singlet one. That explains why the Zc(3900) has not been found in B decays. In addition, the production of the negative charge-parity state might be further suppressed in the heavy quark limit. These two reasons which are based on the molecular assumption offer the first explanation why the Zc(3900) is absent in B decays. Further studies of the absence from both the experimental and the theoretical side is extremely important for understanding the nature of the X(3872) and the Zc(3900). |
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| ISSN: | 0370-2693 |