We search for a low-mass scalar CP-odd Higgs boson, A0, produced in the radiative decay of the upsilon resonance and decaying into a τ+τ− pair: Υ(1S)→γA0. The production of Υ(1S) mesons is tagged by Υ(2S)→π+π−Υ(1S) transitions, using a sample of (98.3±0.9)×106 Υ(2S) mesons collected by the BABAR detector. We find no evidence for a Higgs boson in the mass range 3.5≤mA0≤9.2  GeV, and combine these results with our previous search for the tau decays of the light Higgs in radiative Υ(3S) decays, setting limits on the coupling of A0 to the bb⎯⎯ quarks in the range 0.09–1.9. Our measurements improve the constraints on the parameters of the next-to-minimal-supersymmetric Standard Model and similar theories with low-mass scalar degrees of freedom.

Lees, J.P., Poireau, V., Tisserand, V., Tico, J.G., Grauges, E., Palano, A., et al. (2013). Search for a low-mass scalar Higgs boson decaying to a tau pair in single-photon decays of Y(1S). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 88(7), 1-8 [10.1103/PhysRevD.88.071102].

Search for a low-mass scalar Higgs boson decaying to a tau pair in single-photon decays of Y(1S)

PATRIGNANI, CLAUDIA;
2013

Abstract

We search for a low-mass scalar CP-odd Higgs boson, A0, produced in the radiative decay of the upsilon resonance and decaying into a τ+τ− pair: Υ(1S)→γA0. The production of Υ(1S) mesons is tagged by Υ(2S)→π+π−Υ(1S) transitions, using a sample of (98.3±0.9)×106 Υ(2S) mesons collected by the BABAR detector. We find no evidence for a Higgs boson in the mass range 3.5≤mA0≤9.2  GeV, and combine these results with our previous search for the tau decays of the light Higgs in radiative Υ(3S) decays, setting limits on the coupling of A0 to the bb⎯⎯ quarks in the range 0.09–1.9. Our measurements improve the constraints on the parameters of the next-to-minimal-supersymmetric Standard Model and similar theories with low-mass scalar degrees of freedom.
2013
Lees, J.P., Poireau, V., Tisserand, V., Tico, J.G., Grauges, E., Palano, A., et al. (2013). Search for a low-mass scalar Higgs boson decaying to a tau pair in single-photon decays of Y(1S). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 88(7), 1-8 [10.1103/PhysRevD.88.071102].
Lees, J. P.; Poireau, V.; Tisserand, V.; Tico, J. Garra; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Georges, A.; Kerth, L. T.; Kolom...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/535523
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