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지하실험 연구단
지하실험 연구단
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Is the X(3915) the χc0(2P)?

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Title
Is the X(3915) the χc0(2P)?
Author(s)
Stephen Lars Olsen
Publication Date
2015-03
Journal
PHYSICAL REVIEW D, v.91, no.5, pp.057501 -
Publisher
AMER PHYSICAL SOC
Abstract
The Particle Data Group Meson Summary Table lists the X(3915) meson, an ωJ/ψ mass peak seen in B→KωJ/ψ decays and γγ→ωJ/ψ two-photon fusion reactions, as the χc0(2P), the 23P0 charmonium state. Here, with some reasonable assumptions, it is shown that if the X(3915) is the χc0(2P), the measured strength of the γγ→X(3915) signal implies an upper limit on the branching fraction B(χc0(2P)→ωJ/ψ) that is below a lower limit inferred for the same quantity from the B→KX(3915) decay rate. Also, the absence any signal for X(3915)→D0D¯0 in B+→K+D0D¯0 decays is used to infer the limit B(X(3915)→D0D¯0)<1.2×B(X(3915)→ωJ/ψ). This contradicts expectations that χc0(2P) decays to D0D¯0 should be a dominant process, while decays to ωJ/ψ, which are Okubo-Zweig-Iizuka suppressed, should be relatively rare. These, plus reasons given earlier by Guo and Meissner, raise concerns about the X(3915)=χc0(2P) assignment. © 2015 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/1708
DOI
10.1103/PhysRevD.91.057501
ISSN
2470-0010
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
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