Search results for "Neutral state"

showing 2 items of 2 documents

Observation ofZc(3900)0ine+e−→π0π0J/ψ

2015

Using a data sample collected with the BESIII detector operating at the BEPCII storage ring, we observe a new neutral state Z(c)(3900)(0) with a significance of 10.4 sigma. The mass and width are measured to be 3894.8 +/- 2.3 +/- 3.2 MeV/c(2) and 29.6 +/- 8.2 +/- 8.2 MeV, respectively, where the first error is statistical and the second systematic. The Born cross section for e(+)e(-) -> pi(0)pi(0) J/Psi and the fraction of it attributable to pi(0)Z(c)(3900)(0) -> pi(0)pi(0) J/Psi in the range E-c.m. = 4.19-4.42 GeV are also determined. We interpret this state as the neutral partner of the four-quark candidate Z(c)(3900)(+/-).

Physics010308 nuclear & particles physicsElectron–positron annihilationAnalytical chemistryGeneral Physics and AstronomyState (functional analysis)01 natural sciencesAtomic mass0103 physical sciencesPiTetraquarkAtomic physics010306 general physicsNeutral stateZc(3900)Physical Review Letters
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Spiro-fused bis-hexa-peri-hexabenzocoronene.

2018

A spiro-fused hexa-peri-hexabenzocoronene dimer was synthesized, and its physicochemical properties were studied by UV-Vis absorption and emission spectroscopy as well as cyclic voltammetry. Chemical oxidation of SB-HBC afforded its radical cation and dication derivatives, which could be reversibly reduced to the neutral state.

010405 organic chemistryChemistryDimerMetals and AlloysHexa-peri-hexabenzocoroneneGeneral Chemistry010402 general chemistry01 natural sciencesCatalysis0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsDicationchemistry.chemical_compoundRadical ionPolymer chemistryMaterials ChemistryCeramics and CompositesEmission spectrumCyclic voltammetryAbsorption (chemistry)Neutral stateChemical communications (Cambridge, England)
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