A complete model for $D^+ \to K^-��^+��+$ S-wave
| Autor: | Magalh��es, Patr��cia Camargo, Robilotta, Manoel Roberto |
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| Rok vydání: | 2013 |
| Předmět: | |
| DOI: | 10.48550/arxiv.1312.2033 |
| Popis: | The $D^+ \to K^-��^+��+$ decay have been observed in LHCb collaboration with thousands of events per second from $K��$ threshold. The theoretical treatment of this decay includes a rich dynamic behaviour that mix weak and strong interactions in a non trivial way. In the present work we show recently progress on $D^+ \to K^-��^+��+$ decay within a effective hadronic formalism. The weak sector followed a similar formalism from heavy meson ChPT, where quark c is an external object of SU(3) Goldstone bosons sector and final states interactions description is based in three-body model. The results concerning the vector weak transition revealed a very interesting new scenario in s-wave phase-shift: agrees well with data in the elastic region, and it starts from $-60$ degrees. Up to now the reason way the experimental phase starts at negative degrees($\approx - 138$) was a mystery. However, we show that this behaviour is a consequence of interference between a correct weak vertex dynamic, dominated by $��$ meson propagator, and a rescattering model to the final state interaction. Therefore, this work represent a progress in the understanding of $D^+ \to K^-��^+��+$ and could be applied to other decays. to appear in the proceedings of The 6th International Workshop on Charm Physics (CHARM 2013) |
| Databáze: | OpenAIRE |
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