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S) (n = 1, two, 3) transitions with partial widths of 300 - 400 keV [1116]. Not too long ago Belle
S) (n = 1, 2, 3) transitions with partial widths of 300 - 400 keV [1116]. Lately Belle reported preliminary final [ BMS-790052 dihydrochloride web] results on the observation of (5S) (1S, 2S) and (5S) + - (1D) with anomalously substantial prices [985]. It can be proposed that these anomalies are resulting from rescatterings [1123,1124]. The substantial branching fraction of your (4S) (1S) decay observed in 2010 by BaBar could have a equivalent origin [1125]. The mechanism is often viewed as either as a rescatter??ing of your D D or B B mesons, or as a contribution in the molecular component for the quarkonium wave function. ?The model in which Y (4260) is usually a D1 (2420) D molecule naturally explains the higher probability on the intermediate molecular resonance in the Y (4260) + - J/ transitions [1126,1127] and predicts the Y (4260) X (3872) transitions with high prices [1128]. Such transitions have lately been observed by BES III, with [1107] K + - (2S)2981 Page 74 ofEur. Within the bottomonium sector, there's one particular state with anomalous properties, the (5S), and it decays to distinct channels with related prices [ + - (nS), + - h b (m P), + - (1D), (nS)]. There's no common model describing these peculiarities. To clarify the affinity on the charmonium-like states to some certain channels, the notion of "hadrocharmonium" was proposed in [1084]. It can be a heavy quarkonium embedded into a cloud of light hadron(s), as a result the fallapart decay is dominant. Hadrocharmonium could also give an explanation for [ title= jir.2014.0001] the charged charmonium-like states Z (4430)+ , Z (4050)+ and Z (4250)+ . four.3.5 Summary Quarkonium spectroscopy enjoys an intensive flood of new benefits. The amount of spin-singlet bottomonium states has increased from one particular to four more than the last two years, like a far more precise measurement on the b (1S) mass, 11 MeV away from the PDG2012 typical. There is certainly evidence for among the list of two still missing narrow charmonium states expected ??in the region amongst the D D and D D thresholds. Observations and detailed research of the charged bottomoniumlike states Z b (10610) and Z b (10650) and first outcomes around the charged charmonium-like states Z c open a rich phenomenological field to study exotic states close to open flavor thresholds. There is also important progress in addition to a much more clear experimental scenario for the extremely excited heavy quarkonium states above open flavor thresholds. Current highlights include things like confirmation with the Y (4140) state by CMS and D0, observation with the decays (4040, 4160) J/ by Belle, measurement of your power dependence in the e+ e- + - h c cross section by BES III, observation on the Y (4260) X (3872) by BES III and determination from the Z (4430) spin arity from complete amplitude analysis by Belle. A basic function of hugely excited states is their substantial decay rate to reduced quarkonia using the emission of light hadrons. Rescattering is important for understanding their properties, having said that, there is certainly no general model explaining their decay patterns. The remaining experimental open inquiries or [ title= SART.S23503] controversies are inside the reach from the LHC or may have to wait for the subsequent generation B-factory. Fr.

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