Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/138270
Title: | Search for Dimuon Decays of a Light Scalar Boson in Radiative Transitions Υ→γA0 |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 18-Aug-2009 |
Publisher: | American Physical Society |
Abstract: | We search for evidence of a light scalar boson in the radiative decays of the Υ ( 2 S ) and Υ ( 3 S ) resonances: Υ ( 2 S , 3 S ) → γ A 0 , A 0 → μ + μ − . Such a particle appears in extensions of the standard model, where a light C P -odd Higgs boson naturally couples strongly to b quarks. We find no evidence for such processes in the mass range 0.212 ≤ m A 0 ≤ 9.3 GeV in the samples of 99 × 10 6 Υ ( 2 S ) and 122 × 10 6 Υ ( 3 S ) decays collected by the BABAR detector at the SLAC PEP-II B factory and set stringent upper limits on the effective coupling of the b quark to the A 0 . We also limit the dimuon branching fraction of the η b meson: B ( η b → μ + μ − ) < 0.9 % at 90% confidence level. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.103.081803 |
It is part of: | Physical Review Letters, 2009, vol. 103, num. 8, p. 081803 |
URI: | http://hdl.handle.net/2445/138270 |
Related resource: | https://doi.org/10.1103/PhysRevLett.103.081803 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
577741.pdf | 253.66 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.