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http://hdl.handle.net/2445/131821
Title: | Search for di-muon decays of a low-mass Higgs boson in radiative decays of the Υ(1S) |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 1-Feb-2013 |
Publisher: | American Physical Society |
Abstract: | We search for di-muon decays of a low-mass Higgs boson ( A 0 ) produced in radiative Υ ( 1 S ) decays. The Υ ( 1 S ) sample is selected by tagging the pion pair in the Υ ( 2 S , 3 S ) → π + π − Υ ( 1 S ) transitions, using a data sample of 92.8 × 10 6 Υ ( 2 S ) and 116.8 × 10 6 Υ ( 3 S ) events collected by the BABAR detector. We find no evidence for A 0 production and set 90% confidence level upper limits on the product branching fraction B ( Υ ( 1 S ) → γ A 0 ) × B ( A 0 → μ + μ − ) in the range of ( 0.28 − 9.7 ) × 10 − 6 for 0.212 ≤ m A 0 ≤ 9.20 GeV / c 2 . The results are combined with our previous measurements of Υ ( 2 S , 3 S ) → γ A 0 , A 0 → μ + μ − to set limits on the effective coupling of the b quark to the A 0 . |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.87.031102 |
It is part of: | Physical Review D, 2013, vol. 87, num. 3, p. 031102(R) |
URI: | http://hdl.handle.net/2445/131821 |
Related resource: | https://doi.org/10.1103/PhysRevD.87.031102 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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