We search for a low-mass scalar CP-odd Higgs boson, A(0), produced in the radiative decay of the upsilon resonance and decaying into a tau(+)tau(-) pair: Y(1S) -> gamma A(0). The production of Y(1S) mesons is tagged by Y(2S) -> pi(+)pi(-) Y(1S) transitions, using a sample of (98.3 +/- 0.9) x 10(6) Y(2S) mesons collected by the BABAR detector. We find no evidence for a Higgs boson in the mass range 3: 5 <= m(A)0 <= 9: 2 GeV, and combine these results with our previous search for the tau decays of the light Higgs in radiative Y(3S) decays, setting limits on the coupling of A(0) to the b (b) over bar 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.

Search for a low-mass scalar Higgs boson decaying to a tau pair in single-photon decays of Y(1S) / J. P., L., V., P., V., T., J. G., T., E., G., A., P., G., E., B., S., D. N., B., A., G., L. T., K., Yu G., K., G., L., U., P., H., K., T., S., D. J., A., C., H., T. S., M., J. A., M., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 88:7(2013), p. 071102. [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)

FACCINI, Riccardo;FERRONI, Fernando;
2013

Abstract

We search for a low-mass scalar CP-odd Higgs boson, A(0), produced in the radiative decay of the upsilon resonance and decaying into a tau(+)tau(-) pair: Y(1S) -> gamma A(0). The production of Y(1S) mesons is tagged by Y(2S) -> pi(+)pi(-) Y(1S) transitions, using a sample of (98.3 +/- 0.9) x 10(6) Y(2S) mesons collected by the BABAR detector. We find no evidence for a Higgs boson in the mass range 3: 5 <= m(A)0 <= 9: 2 GeV, and combine these results with our previous search for the tau decays of the light Higgs in radiative Y(3S) decays, setting limits on the coupling of A(0) to the b (b) over bar 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
01 Pubblicazione su rivista::01a Articolo in rivista
Search for a low-mass scalar Higgs boson decaying to a tau pair in single-photon decays of Y(1S) / J. P., L., V., P., V., T., J. G., T., E., G., A., P., G., E., B., S., D. N., B., A., G., L. T., K., Yu G., K., G., L., U., P., H., K., T., S., D. J., A., C., H., T. S., M., J. A., M., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 88:7(2013), p. 071102. [10.1103/physrevd.88.071102]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/637410
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