Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/22006
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Evidence for the eta(b)(1S) Meson in Radiative Y(2S) Decay |
Autor: | Babar Collaboration; Azzolini, Virginia; López-March, Neus CSIC; Martínez-Vidal, Fernando CSIC ORCID; Milanés, Diego A. CSIC ORCID; Oyanguren, Arantza CSIC ORCID; Aubert, B. | Fecha de publicación: | 15-oct-2009 | Editor: | American Physical Society | Citación: | Physical Review Letters 103 (16): 161801 (2009) | Resumen: | We have performed a search for the eta_b(1S) meson in the radiative decay of the Upsilon(2S) resonance using a sample of 91.6 million Upsilon(2S) events recorded with the BABAR detector at the PEP-II B factory at the SLAC National Accelerator Laboratory. We observe a peak in the photon energy spectrum at E_gamma = 609.3 {+4.6} {-4.5} (stat) +/- 1.9 (syst) MeV, corresponding to an eta_b(1S) mass of 9394.2 {+4.8} {-4.9} (stat) +/- 2.0 (syst) MeV/c^2. The branching fraction for the decay Upsilon(2S) --> gamma eta_b(1S) is determined to be [3.9 +/-1.1 (stat) {+1.1} {-0.9} (syst)] x 10^(-4). We find the ratio of branching fractions B[Upsilon(2S) --> gamma eta_b(1S)]/B[Upsilon(3S) --> gamma eta_b(1S)] = 0.82 +/- 0.24 (stat) {+0.20}{-0.19} (syst). | Versión del editor: | http://dx.doi.org/ 10.1103/PhysRevLett.103.161801 | URI: | http://hdl.handle.net/10261/22006 | DOI: | 10.1103/PhysRevLett.103.161801 | ISSN: | 0031-9007 |
Aparece en las colecciones: | (IFIC) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
evidence for the eta.pdf | 178,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
116
checked on 18-mar-2024
WEB OF SCIENCETM
Citations
79
checked on 29-feb-2024
Page view(s)
464
checked on 19-mar-2024
Download(s)
247
checked on 19-mar-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.