# Search for a low-mass Higgs boson in Y(3S)-->gamma A^0, A^0-->tau^+tau^- at BABAR

Abstract : We search for a light Higgs boson, $A^0$, in the radiative decay $\Upsilon(3S)\to\gamma A^0$, $A^0\to\tau^+\tau^-$, $\tau^+\to e^+\nu_e \overline{\nu}_{\tau}$ or $\tau^+\to \mu^+ \nu_{\mu} \overline{\nu}_{\tau}$. The data sample contains 122 million $\Upsilon(3S)$ events recorded with the \babar detector. We find no evidence for a narrow structure in the studied $\tau^+\tau^-$ invariant mass region of $4.03(1.5-16)\times 10^{-5}$ across the $m_{\tau^+\tau^-}$ range. We also set a 90% C.L. upper limit on the $\tau^+\tau^-$-decay of the $\eta_b$ at ${\mathcal{B}}(\eta_b\to \tau^+\tau^-)<8%$.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00420531
Contributor : Swarna Bassava <>
Submitted on : Tuesday, September 29, 2009 - 11:45:16 AM
Last modification on : Tuesday, December 22, 2020 - 12:40:02 PM

### Citation

B. Aubert, Y. Karyotakis, J. P. Lees, V. Poireau, E. Prencipe, et al.. Search for a low-mass Higgs boson in Y(3S)-->gamma A^0, A^0-->tau^+tau^- at BABAR. Physical Review Letters, American Physical Society, 2009, 103, pp.181801. ⟨10.1103/PhysRevLett.103.181801⟩. ⟨in2p3-00420531⟩

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