We search for di-muon decays of a low-mass Higgs boson (A0) produced in radiative Υ(1S) decays. The Υ(1S) sample is selected by tagging the pion pair in the Υ(2S,3S)→π+π−Υ(1S) transitions, using a data sample of 92.8×106 Υ(2S) and 116.8×106 Υ(3S) events collected by the BABAR detector. We find no evidence for A0 production and set 90% confidence level upper limits on the product branching fraction ℬ(Υ(1S)→γA0)×ℬ(A0→μ+μ−) in the range of (0.28−9.7)×10−6 for 0.212≤mA0≤9.20  GeV/c2. The results are combined with our previous measurements of Υ(2S,3S)→γA0, A0→μ+μ− to set limits on the effective coupling of the b quark to the A0.

Search for di-muon decays of a low-mass Higgs boson in radiative decays of the Υ(1S) / J. P., L., V., P., V., T., J., G.T., E., G., A., P., G., E., B., S., D. N., B., L. T., K., Kolomensky, Y.u.G., G., L., H., K., T., S., D. J., A., C., H., T. S., M., J. A., M., R. Y., S.o., A., K., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 87:(2013), pp. 031102-1-031102-8. [10.1103/PhysRevD.87.031102]

Search for di-muon decays of a low-mass Higgs boson in radiative decays of the Υ(1S)

LANCERI, LIVIO;VITALE, LORENZO;
2013-01-01

Abstract

We search for di-muon decays of a low-mass Higgs boson (A0) produced in radiative Υ(1S) decays. The Υ(1S) sample is selected by tagging the pion pair in the Υ(2S,3S)→π+π−Υ(1S) transitions, using a data sample of 92.8×106 Υ(2S) and 116.8×106 Υ(3S) events collected by the BABAR detector. We find no evidence for A0 production and set 90% confidence level upper limits on the product branching fraction ℬ(Υ(1S)→γA0)×ℬ(A0→μ+μ−) in the range of (0.28−9.7)×10−6 for 0.212≤mA0≤9.20  GeV/c2. The results are combined with our previous measurements of Υ(2S,3S)→γA0, A0→μ+μ− to set limits on the effective coupling of the b quark to the A0.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2768386
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