Published November 8, 2011
| Version Published
Journal Article
Open
Evidence for the h_b(1P) meson in the decay Y(3S) → π^0h_b(1P)
Abstract
Using a sample of 122×10^6 Υ(3S) events recorded with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC, we search for the h_b(1P) spin-singlet partner of the P-wave χ_(bJ)(1P) states in the sequential decay Υ(3S)→π^0h_b(1P), hb(1P)→γη_b(1S). We observe an excess of events above background in the distribution of the recoil mass against the π0 at mass 9902±4(stat)±2(syst) MeV/c^2. The width of the observed signal is consistent with experimental resolution, and its significance is 3.1σ, including systematic uncertainties. We obtain the value (4.3±1.1(stat)±0.9(syst))×10^(-4) for the product branching fraction B(Υ(3S)→π^0h_b)×B(h_b→γη_b).
Additional Information
© 2011 American Physical Society. Received 22 February 2011; published 8 November 2011. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BaBar. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MICIIN (Spain), STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union), the A. P. Sloan Foundation (USA) and the Binational Science Foundation (USA-Israel).Attached Files
Published - Lees2011p16500Phys_Rev_D.pdf
Files
Lees2011p16500Phys_Rev_D.pdf
Additional details
Identifiers
- Eprint ID
- 28713
- Resolver ID
- CaltechAUTHORS:20120109-112336215
Funding
- Department of Energy (DOE)
- NSERC (Canada)
- CEA and CNRS/IN2P3 (France)
- BMBF and DFG (Germany)
- INFN (Italy)
- FOM (The Netherlands)
- NFR (Norway)
- MES (Russia)
- MICIIN (Spain)
- STFC (United Kingdom)
- Marie Curie EIF (European Union)
- A.P. Sloan Foundation
- Binational Science Foundation (USA-Israel)
- NSF
Dates
- Created
-
2012-01-10Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field