Search for a Low-Mass Higgs Boson in Upsilon (3S)--> gamma A0, A0--> tau + tau - at BABAR
We search for a light Higgs boson A0 in the radiative decay Υ(3S)→γA0, A0-->τ+τ-, τ+→e+νeν̅ τ, or τ+-->μ+νμν̅ τ. The data sample contains 122×106 Υ(3S) events recorded with the BABAR detector. We find no evidence for a narrow structure in the studied τ+τ- invariant mass region of 4.03<mτ+τ-...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/54803 https://orcid.org/0000-0002-8667-5660 |
| Summary: | We search for a light Higgs boson A0 in the radiative decay Υ(3S)→γA0, A0-->τ+τ-, τ+→e+νeν̅ τ, or τ+-->μ+νμν̅ τ. The data sample contains 122×106 Υ(3S) events recorded with the BABAR detector. We find no evidence for a narrow structure in the studied τ+τ- invariant mass region of 4.03<mτ+τ-<10.10 GeV/c2. We exclude at the 90% confidence level (C.L.) a low-mass Higgs boson decaying to τ+τ- with a product branching fraction B(Υ(3S)-->γA0)×B(A0-->τ+τ-)>(1.5–16)×10-5 across the mτ+τ- range. We also set a 90% C.L. upper limit on the τ+τ- decay of the ηb at B(ηb-->τ+τ-)<8%. |
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