Abstract
We search for a light scalar particle produced in single-photon decays of the Upsilon(3S) resonance through the process Upsilon(3S) -> gamma A0, A0 -> invisible. Such an object appears in Next-to-Minimal Supersymmetric extensions of the Standard Model, where a light CP-odd Higgs boson naturally couples strongly to b-quarks. If, in addition, there exists a light, stable neutralino, decays of A0 could be preferentially to an invisible final state. We search for events with a single high-energy photon and a large missing mass, consistent with a 2-body decay of Upsilon(3S). We find no evidence for such processes in a sample of 122*10^6 Upsilon(3S) decays collected by the BABAR collaboration at the PEP-II B-factory, and set 90% C.L. upper limits on the branching fraction B(Upsilon(3S) -> gamma A0)*B(A0 -> invisible) at (0.7-31)*10^{-6} in the mass range m(A0)<=7.8 GeV. The results are preliminary.
Original language | English |
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Title of host publication | Proceedings, 34th International Conference on High Energy Physics |
Number of pages | 17 |
Publication status | Published - 2008 |
Event | 34th International Conference on High Energy Physics - Philadelphia, United States Duration: 30 Jul 2008 → 5 Aug 2008 |
Conference
Conference | 34th International Conference on High Energy Physics |
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Country/Territory | United States |
City | Philadelphia |
Period | 30/07/08 → 5/08/08 |