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.

Lees, J.P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Palano, A., et al. (2013). Search for di-muon decays of a low-mass Higgs boson in radiative decays of the Upsilon(1S). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(3), 1-8 [10.1103/PhysRevD.87.031102].

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

PATRIGNANI, CLAUDIA;
2013

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.
2013
Lees, J.P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Palano, A., et al. (2013). Search for di-muon decays of a low-mass Higgs boson in radiative decays of the Upsilon(1S). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(3), 1-8 [10.1103/PhysRevD.87.031102].
Lees, J. P.; Poireau, V.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/535526
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