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In this work, an integrated single chip dual cavity VCSEL has been designed which comprises an electrically pumped 980 nm bottom VCSEL section fabricated using GaInAs/AlGaAs MQW active region and a 1550 nm top VCSEL section constructed using GaInAs/AlGaInAs MQW active region but optically pumped using half of the produced 980 nm light entering into it from the electrically pumped bottom cavity....
The nonleptonic weak decays of charmed mesons into a scalar meson and a pseudoscalar meson are studied. The scalar mesons under consideration are σ [or f0(600)], κ, f0(980), a0(980) and K 0 (1430). A consistent picture provided by the data suggests that the light scalars below or near 1 GeV form an SU(3) flavor nonet and are predominately the q2q̄2 states, while the scalar mesons above 1 GeV can...
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Nguyen Van Toan 1,*, Shim Hahng 2,3, Yunheub Song 2 and Takahito Ono 3 1 Microsystem Integration Center (μSIC), Tohoku University, Sendai 980-8579, Japan 2 Department of Electronic Engineering, Hanyang University, Seoul 04763, Korea; [email protected] 3 Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan; [email protected] (S.H.); [email protected]....
It is argued that radiative decays of scalars a0/f0(980) can serve as a decisive tool in establishing the nature of the latter. In particular, predictions for the widths of the radiative decays S → γV (S = a0/f0(980), V = ω/ρ/γ) are given in the framework of the molecule model of the scalars. Finite–range corrections are discussed in detail for the two-gamma decays of hadronic molecules, with a...
Recently, by reanalyzing the phase shift data of I = 0 ππ and of I = 1/2 Kπ scatterings, we showed the evidences for existence of light scalar mesons, σ(600) and κ(900), respectively, which had been sought but missing for a long time. The σ(600) and κ(900) together with the established resonances, a0(980) and f0(980), are shown to be consistently classified as the members of a single scalar σ-n...
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