Observation of the χc2(2P) meson in the reaction γγ→DD[bar] at BABAR
A search for the Z(3930) resonance in γγ production of the DD[bar] system has been performed using a data sample corresponding to an integrated luminosity of 384 fb−1 recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The DD[bar] invariant mass distribution...
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| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
19 May 2010
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Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2010, Jahrgang: 81, Heft: 9, Pages: 1-16 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.81.092003 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.81.092003 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.81.092003 
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| Verfasserangaben: | BABAR Collaboration* |
| Zusammenfassung: | A search for the Z(3930) resonance in γγ production of the DD[bar] system has been performed using a data sample corresponding to an integrated luminosity of 384 fb−1 recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The DD[bar] invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8σ. We determine mass and width values of (3926.7±2.7±1.1) MeV/c2 and (21.3±6.8±3.6) MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C parity (JPC=2); therefore we identify the Z(3930) state as the χc2(2P) meson. The value of the partial width Γγγ×B(Z(3930)→DD[bar]) is found to be (0.24±0.05±0.04) keV. |
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| Beschreibung: | *BABAR Collaboration: B. Aubert, J. Marks, S. Schenk, U. Uwer [und 483 weitere Personen] Im Titel steht der zweite Buchstabe D mit einem Oberstrich Im Titel sind der Buchstabe c und die Zahl 2 tiefgestellt Gesehen am 28.11.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.81.092003 |