Dynamical origin and the pole structure of X(3872)

The dynamical mechanism of channel coupling with the decay channels is applied to the case of coupled charmonium--DD* states with JPC=1++. A pole analysis is done and the DD* production cross section is calculated in qualitative agreement with experiment. The sharp peak at the D0D0* threshold and fl...

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Bibliographic Details
Published in:Physical review letters 2010-09, Vol.105 (10), p.102002-102002, Article 102002
Main Authors: Danilkin, I V, Simonov, Yu A
Format: Article
Language:English
Subjects:
BOSONS
BREIT-WIGNER FORMULA
CHARM PARTICLES
CHARMED MESONS
CHARMONIUM
COUPLING
CROSS SECTIONS
D MESONS
D-2010 MESONS
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
HADRONS
MESONS
MEV RANGE
PARTICLE DECAY
PARTICLE STRUCTURE
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PSEUDOSCALAR MESONS
QUARKONIUM
RESONANCE PARTICLES
VECTOR MESONS
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Summary:The dynamical mechanism of channel coupling with the decay channels is applied to the case of coupled charmonium--DD* states with JPC=1++. A pole analysis is done and the DD* production cross section is calculated in qualitative agreement with experiment. The sharp peak at the D0D0* threshold and flat background are shown to be due to Breit-Wigner resonance, shifted by channel coupling from the original position of 3954 MeV for the 23P1, QQ state. A similar analysis, applied to the n=2, 3P2, 1P1, 3P0, allows us to associate the first one with the observed Z(3930) J=2 and explains the destiny of 3P0.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.105.102002