Search for production of invisible final states in single-photon decays of Υ(1S)
We search for single-photon decays of the Υ(1S) resonance, Υ→γ+invisible, where the invisible state is either a particle of definite mass, such as a light Higgs boson A0, or a pair of dark matter particles, χ¯¯¯χ. Both A0 and χ are assumed to have zero spin. We tag Υ(1S) decays with a dipion transit...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
6 July 2011
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Physical review letters
Year: 2011, Jahrgang: 107, Heft: 2, Pages: 1-7 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.107.021804 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.107.021804 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.107.021804 
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| Verfasserangaben: | BABAR Collaboration* |
| Zusammenfassung: | We search for single-photon decays of the Υ(1S) resonance, Υ→γ+invisible, where the invisible state is either a particle of definite mass, such as a light Higgs boson A0, or a pair of dark matter particles, χ¯¯¯χ. Both A0 and χ are assumed to have zero spin. We tag Υ(1S) decays with a dipion transition Υ(2S)→π+π−Υ(1S) and look for events with a single energetic photon and significant missing energy. We find no evidence for such processes in the mass range mA0≤9.2 GeV and mχ≤4.5 GeV in the sample of 98×106 Υ(2S) decays collected with the BABAR detector and set stringent limits on new physics models that contain light dark matter states. |
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| Beschreibung: | *BABAR Collaboration: P. del Amo Sanchez, J. Marks, U. Uwer [und 436 weitere Personen] Gesehen am 04.10.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.107.021804 |