Delicate interplay between the D0D∗0, ρ0J/ψ, and ωJ/ψ channels in the X(3872) resonance
The nature of the X (3872) enhancement is analyzed in the framework of the Resonance-Spectrum Expansion, by studying it as a regular J PC =1 ++ charmonium state, though strongly influenced and shifted by open-charm decay channels. The observed but Okubo–Zweig–Iizuka-forbidden ρ 0 J / ψ and ωJ / ψ ch...
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Published in | The European physical journal. C, Particles and fields Vol. 71; no. 10 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer-Verlag
2011
|
Subjects | |
Online Access | Get full text |
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Summary: | The nature of the
X
(3872) enhancement is analyzed in the framework of the Resonance-Spectrum Expansion, by studying it as a regular
J
PC
=1
++
charmonium state, though strongly influenced and shifted by open-charm decay channels. The observed but Okubo–Zweig–Iizuka-forbidden
ρ
0
J
/
ψ
and
ωJ
/
ψ
channels are coupled as well, but effectively smeared out by using complex
ρ
0
and
ω
masses, in order to account for their physical widths, followed by a rigorous algebraic procedure to restore unitarity. A very delicate interplay between the
D
0
D
∗0
,
ρ
0
J
/
ψ
, and
ωJ
/
ψ
channels is observed. The data clearly suggest that the
X
(3872) is a very narrow axial-vector
resonance, with a pole at or slightly below the
D
0
D
∗0
threshold. |
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ISSN: | 1434-6044 1434-6052 |
DOI: | 10.1140/epjc/s10052-011-1762-7 |