Observation of X(3872) -} J/psi gamma and Search for X(3872) -} psi ' gamma in B Decays

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F11%3A10105905" target="_blank" >RIV/00216208:11320/11:10105905 - isvavai.cz</a>
Result on the web
<a href="http://prl.aps.org/pdf/PRL/v107/i9/e091803" target="_blank" >http://prl.aps.org/pdf/PRL/v107/i9/e091803</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.107.091803" target="_blank" >10.1103/PhysRevLett.107.091803</a>

Result language
angličtina
Original language name
Observation of X(3872) -} J/psi gamma and Search for X(3872) -} psi ' gamma in B Decays
Original language description
We report a study of B -} (J/psi gamma)K and B -} (psi''gamma)K decay modes using 772 X 10(6) B (B) over bar events collected at the Y(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We observe X(3872) -} J/psi gamma and report the first evidence for chi(c2) -} J/psi gamma in B -} (X(c (c) over bar)gamma)K decays, while in a search for X(3872) -} psi''gamma no significant signal is found. We measure the branching fractions, B(B(+/-) -} X(3872)K(+/-))B(X(3872) -} J/psi gamma) = (1.78(-0.44)(+0.48) +/- 0.12) X 10(-6), B(B(+/-) -} chi(c2)K(+/-)) = (1.11(-0.34)(+0.36) +/- 0.09) X 10(-5), B(B(+) -} X(3872)K(+))B(X(3872) -} psi''gamma) { 3.45 X 10(-6) (upper limit at 90% C. L.), and also provide upper limits for other searches.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BF - Elementary particle theory and high energy physics
OECD FORD branch
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Project
<a href="/en/project/LA10033" target="_blank" >LA10033: Participation in the Belle a Belle II experiments: study of B-meson decays</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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