Main Page


Revision as of 05:40, 2 January 2018 by Border47drain (Talk | contribs)
Jump to: navigation, search

Lately Belle S) (n = 1, 2, three) transitions with partial widths of 300 - 400 keV [1116]. Lately Belle reported preliminary outcomes around the observation of (5S) (1S, 2S) and (5S) + - (1D) with anomalously significant rates [985]. It truly is proposed that these anomalies are because of rescatterings [1123,1124]. The massive branching fraction of your (4S) (1S) decay observed in 2010 by BaBar could possess a comparable origin [1125]. The mechanism could be considered either as a rescatter??ing in the D D or B B mesons, or as a contribution on the molecular element towards the quarkonium wave function. ?The model in which Y (4260) is a D1 (2420) D molecule naturally explains the high probability in 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 not too long ago been observed by BES III, with [1107] K + - (2S)2981 Page 74 ofEur. Phys. J. C (2014) 74:[e+ e- X (3872)] 11 . [e+ e- + - J/](four.15)In spite of striking similarities involving the observations in the CP-868596 chemical information charmonium and bottomonium sectors, you will find also clear differences. In the charmonium sector, each and every of your Y (3915), (4040), (4160), Y (4260), Y (4360) and Y (4660) decays to only one particular certain final state with charmonium [ J/, J/, + - J/ or + - (2S)]. In the bottomonium sector, there is a single state with anomalous properties, the (5S), and it decays to various channels with comparable prices [ + - (nS), + - h b (m P), + - (1D), (nS)]. There's no general model describing these peculiarities. To explain the affinity of your charmonium-like states to some unique channels, the notion of "hadrocharmonium" was proposed in [1084]. It really is a heavy quarkonium embedded into a cloud of light hadron(s), hence the fallapart decay is dominant. Hadrocharmonium could also present an explanation for title= jir.2014.0001 the charged charmonium-like states Z (4430)+ , Z (4050)+ and Z (4250)+ . 4.three.5 Summary Quarkonium spectroscopy enjoys an intensive flood of new benefits. The number of spin-singlet bottomonium states has improved from one to four over the final 2 years, which includes a a lot more precise measurement on the b (1S) mass, 11 MeV away in the PDG2012 typical. There is certainly evidence for one of many two nonetheless missing narrow charmonium states anticipated ??inside the region between the D D and D D thresholds. Observations and detailed research with the charged bottomoniumlike states Z b (10610) and Z b (10650) and very first final results around the charged charmonium-like states Z c open a rich phenomenological field to study exotic states close to open flavor thresholds. There's also substantial progress as well as a a lot more clear experimental scenario for the highly excited heavy quarkonium states above open flavor thresholds. Recent highlights contain confirmation with the Y (4140) state by CMS and D0, observation from the decays (4040, 4160) J/ by Belle, measurement from the power dependence in the e+ e- + - h c cross section by BES III, observation in the Y (4260) X (3872) by BES III and determination from the Z (4430) spin arity from complete amplitude analysis by Belle.

Personal tools