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Understanding Y(4274) and X(4320) in the $J/psi phi$ invariant mass spectrum | | Jun He
; Pei-Liang Lu
; | | Date: |
26 Sep 2013 | | Abstract: | In this work we study the structures near 4.3 GeV in the $J/psi phi$
invariant mass spectra in B meson decay process $B^+ o J/psi phi K^+$ and
two photon fusion process $gammagamma o J/psi phi$. The Y(4274) as a
$D_sD_{s0}$ $(2317)$ molecular is studied in the Bethe-Salpeter equation
approach with quasipotential approximation. The absence of Y(4274) in
$gammagamma o J/psi phi$ channel can be well explained by the decay widths
of Y(4274) decaying to $gammagamma$ and $J/psiphi$. The distribution of
mass difference released by CMS collaboration is reproduced by two resonances
near 4.3 GeV, Y(4274) and X(4320). The different production mechanism suggests
X(4320) observed in the B decay should be the missing $3^3P_1$ charmonium state
$chi’’_{c1}$ and different from X(4350) observed in two photon fusion which
can be assigned as $chi’’_{c2}$. | | Source: | arXiv, 1309.6718 | | Services: | Forum | Review | PDF | Favorites | |
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