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http://hdl.handle.net/2445/131703
Title: | Search for resonances decaying to ηcπ+π- in two-photon interactions |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Fotons Experiments Particle physics Photons Experiments |
Issue Date: | 6-Nov-2012 |
Publisher: | American Physical Society |
Abstract: | We report a study of the process γ γ → X → η c π + π − , where X stands for one of the resonances χ c 2 ( 1 P ) , η c ( 2 S ) , X ( 3872 ) , X ( 3915 ) , or χ c 2 ( 2 P ) . The analysis is performed with a data sample of 473.9 fb − 1 collected with the BABAR detector at the PEP-II asymmetric-energy electron-positron collider. We do not observe a significant signal for any channel, and calculate 90% confidence-level upper limits on the products of branching fractions and two-photon widths Γ X → γ γ B ( X → η c π + π − ) : 15.7 eV for χ c 2 ( 1 P ) , 133 eV for η c ( 2 S ) , 11.1 eV for X ( 3872 ) (assuming it to be a spin-2 state), 16 eV for X ( 3915 ) (assuming it to be a spin-2 state), and 18 eV for χ c 2 ( 2 P ) . We also report upper limits on the ratios of branching fractions B ( η c ( 2 S ) → η c π + π − ) / B ( η c ( 2 S ) → K 0 S K + π − ) < 10.0 and B ( χ c 2 ( 1 P ) → η c π + π − ) / B ( χ c 2 ( 1 P ) → K 0 S K + π − ) < 32.9 at the 90% confidence level. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.86.092005 |
It is part of: | Physical Review D, 2012, vol. 86, num. 9, p. 092005 |
URI: | http://hdl.handle.net/2445/131703 |
Related resource: | https://doi.org/10.1103/PhysRevD.86.092005 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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