Studies of charmonium-like states at BABAR
| Autor: | Mokhtar, Arafat Gabareen |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | PoS EPS-HEP2009:052,2009 |
| Druh dokumentu: | Working Paper |
| Popis: | Several charmonium-like states above $D\bar{D}$ threshold have been discovered at the Belle and BABAR B-factories. Some of these states are produced via Initial State Radiation (e.g. Y(4260) and Y(4350)), and some are observed in B-meson decays (e.g. X(3872), and Y(3940)). The Belle observations of the enhancements in the $\psi(2S)\pi^-$ and $\chi_{c1}\pi^-$, i.e. the Z(4430)-, Z_1(4050)-, and Z_2(4250)-, have generated a great deal of interest, because such states must have minimum quark content $(c\bar{c}d\bar{u})$, i.e. these are candidate four-quark state. The BABAR Collaboration does not confirm the existinence of the $Z(4430)^-$. Comment: To appear in the proceedings of the 2009 Europhysics Conference on High Energy Physics, July 16-22, 2009, Krakow, Poland |
| Databáze: | arXiv |
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