We search for the decay Υ(1S)→γA0, A0→gg or ssbar, where A0 is the pseudoscalar light Higgs boson predicted by the next-to-minimal supersymmetric Standard Model. We use a sample of (17.6±0.3)×106 Υ(1S) mesons produced in the BABAR experiment via e+e−→Υ(2S)→π+π−Υ(1S). We see no significant signal and set 90%-confidence-level upper limits on the product branching fraction ℬ(Υ(1S)→γA0)·ℬ(A0→gg or ssbar) ranging from 10−6 to 10−2 for A0 masses in the range 0.5–9.0 GeV/c2.
Search for a light Higgs boson decaying to two gluons or s(s)over-bar in the radiative decays of Upsilon(1S)
CONTRI, ROBERTO;GUIDO, ELISA;LO VETERE, MAURIZIO;MONGE, MARIA ROBERTA;
2013-01-01
Abstract
We search for the decay Υ(1S)→γA0, A0→gg or ssbar, where A0 is the pseudoscalar light Higgs boson predicted by the next-to-minimal supersymmetric Standard Model. We use a sample of (17.6±0.3)×106 Υ(1S) mesons produced in the BABAR experiment via e+e−→Υ(2S)→π+π−Υ(1S). We see no significant signal and set 90%-confidence-level upper limits on the product branching fraction ℬ(Υ(1S)→γA0)·ℬ(A0→gg or ssbar) ranging from 10−6 to 10−2 for A0 masses in the range 0.5–9.0 GeV/c2.
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