Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-04-30
Nucl.Phys.A815:53-66,2009; Erratum-ibid.A857:48-49,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 9 figures
Scientific paper
10.1016/j.nuclphysa.2008.10.015
We use QCD sum rules to test the nature of the recently observed mesons Y(4260), Y(4350) and Y(4660), assumed to be exotic four-quark $(c\bar{c}q\bar{q})$ or $(c\bar{c}s\bar{s})$ states with $J^{PC}=1^{--}$. We work at leading order in $\alpha_s$, consider the contributions of higher dimension condensates and keep terms which are linear in the strange quark mass $m_s$. We find for the $(c\bar{c}s\bar{s})$ state a mass $m_Y=(4.65\pm 0.10)$ GeV which is compatible with the experimental candidate Y(4660), while for the $(c\bar{c}q\bar{q})$ state we find a mass $m_Y=(4.49\pm 0.11)$ GeV, which is higger than the mass of the experimental candidate Y(4350). With the tetraquark structure we are working we can not explain the Y(4260) as a tetraquark state. We also consider molecular $D_{s0}\bar{D}_s^*$ and $D_{0}\bar{D}^*$ states. For the $D_{s0}\bar{D}_s^*$ molecular state we get $m_{D_{s0}\bar{D}_s^*}=(4.42\pm 0.10)$ GeV which is consistent, considering the errors, with the mass of the meson Y(4350) and for the $D_{0}\bar{D}^*$ molecular state we get $m_{D_{0}\bar{D}^*}=(4.27\pm 0.10)$ GeV in excelent agreement with the mass of the meson Y(4260).
Albuquerque Raphael M.
Nielsen Mikkel
No associations
LandOfFree
QCD sum rules study of the $J^{PC}=1^{--}$ charmonium $Y$ mesons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with QCD sum rules study of the $J^{PC}=1^{--}$ charmonium $Y$ mesons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and QCD sum rules study of the $J^{PC}=1^{--}$ charmonium $Y$ mesons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-577971