A New Signature for Glueballs

Silva, M. L. L. da; Vasconcellos, C. A. Z.; Hadjimichef, Dimiter

doi:10.1142/s0218271804005596

Cited by 5 publications

(9 citation statements)

References 2 publications

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“…Both values compare well with the experimental IP of 6.84 eV. The strong feature at around 9 eV that was deconvoluted into two peaks 66 actually arises from 10 close-lying orbitals. Errors increase for higher IPs, overestimating them by about 0.4 eV.…”

Section: Ion Statessupporting

confidence: 85%

“…51,53 A particularly suitable functional for large -systems is wB97XD. 54,65 For 4-thiophene, gas-phase IPs 66 were predicted at wB97XD/6-311G* level with orbital energies and states showing errors of less than 0.2 eV. 54 In Figure 1, orbital energies and states are compared with experiment for 8-thiophene at wB97XD/6-311G* and B3LYP/6-311G* (all figures in this article are based on results obtained using Gaussian 09 67 ).…”

Section: Ion Statesmentioning

confidence: 99%

“…54 In Figure 1, orbital energies and states are compared with experiment for 8-thiophene at wB97XD/6-311G* and B3LYP/6-311G* (all figures in this article are based on results obtained using Gaussian 09 67 ). Experimental peak positions and heights are obtained from Table 1 in the study by de Silva Filho et al 66 Orbital energies were given peak heights of 1, and states are given peak heights corresponding to the square of the coefficient of the dominant electron configuration in the cation state. A coefficient of close to 1 indicates that a peak is due to a single electron removal, small coefficients indicate strong correlation.…”

Section: Ion Statesmentioning

confidence: 99%

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Electronic structure of conducting organic polymers: insights from time‐dependent density functional theory

Salzner

2014

WIREs Comput Mol Sci

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Cataloged from PDF version of article.Conducting organic polymers (COPs) became an active field of research after it was discovered how thin films rather than insoluble infusible powders can be produced. The combination of the properties of plastics with those of semiconductors opened the research field of organic electronics. COPs share many electronic properties with inorganic semiconductors, but there are also major differences, e. g., the nature of the charge carriers and the amount of the exciton binding energy. Theoretical analysis has been used to interpret experimental observations early on. The polaron model that was developed from one-electron theories is still the most widely used concept. In the 1990s, time-dependent density functional theory (TDDFT) became available for routine calculations. Using TDDFT, electronic states of long oligomers can be calculated. Now UV spectra of neutral and oxidized or reduced species can be compared with in situ UV spectra recorded during doping. Likewise states of cations can be used to model photoelectron spectra. Analysis of states has resolved several puzzles which cannot be understood with the polaron model, e. g., the origin of the dual absorption band of green polymers and the origin of a 'vestigial neutral band' upon doping of long oligomers. DFT calculations also established that defect localization is not crucial for spectral changes observed during doping and that there are no bound bipolarons in COPs. (C) 2014 John Wiley & Sons, Ltd

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Section: Ion Statessupporting

confidence: 85%

Section: Ion Statesmentioning

confidence: 99%

Section: Ion Statesmentioning

confidence: 99%

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Electronic structure of conducting organic polymers: insights from time‐dependent density functional theory

Salzner

2014

WIREs Comput Mol Sci

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“…1 ) and hadron physics to describe hadron-hadron scattering interactions (Refs. [2][3] ) and meson decay (Ref. 4 ).…”

Section: Introductionmentioning

confidence: 99%

The Ds1(2536)+ Decay Widths in the C3P0 Model

Rodrigues

Silva

Hadjimichef

2017

Int. J. Mod. Phys. Conf. Ser.

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The Fock-Tani representation is a field theory formalism appropriated for the simultaneous treatment of composite particles and their constituents. The 3P0 model is a typical decay model which considers only OZI-allowed strong decays. The model considers a quark-antiquark pair created with the vacuum quantum numbers in the presence of the initial state meson. It is described as the non-relativistic limit of the pair creation Hamiltonian. Applying the Fock-Tani transformation to the microscopic Hamiltonian of the pair creation produces the characteristic expansion in powers of the wavefunction, where the 3P0 model is the lowest order in the expansion. The corrected 3P0 model (C3P0) is obtained from higher orders in the expansion, by the introduction of the bound state kernel ∆, called the bound state correction. The goal of this work is to study the application of the 3P0 model and C3P0 model in detail for the strange charmed meson sector (D SJ meson). In particular, we shall calculate the decay amplitudes and decay rates of the D s1 (2536) + .

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“…A mapping technique long used in atomic physics, 1-3 the Fock-Tani formalism (FTf), has been adapted, in previous publications, [4][5][6][7][8][9] in order to describe hadronhadron scattering interactions with constituent interchange. Recently, this technique has been extended to meson decay.…”

Section: Introductionmentioning

confidence: 99%

LIGHT MESON DECAY IN THE ${\rm C}\,{}^{3}\!P_{0}$ MODEL

Quadros

Silva

et al. 2010

Mod. Phys. Lett. A

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Having its origin in a successful mapping technique, the Fock-Tani formalism, the corrected 3 P 0 model (C 3 P 0 ) retains the basic aspects of the 3 P 0 predictions with the inclusion of bound-state corrections. Evaluation of the decay amplitudes has been performed for open-flavor strong decays in the light meson sector. The bound-state corrections introduce a fine-tuning for the former 3 P 0 model, in particular, the adjustment of the D/S ratios in b 1 → ωπ, a 1 → ρπ and h 1 → ρπ decays.

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A New Signature for Glueballs

Abstract: In this work we use a mapping technique to derive in the context of a constituent gluon model an effective Hamiltonian that involves explicit gluon degrees of freedom. We study glueballs with two gluons using the Fock–Tani formalism.

Cited by 5 publications

References 2 publications

Electronic structure of conducting organic polymers: insights from time‐dependent density functional theory

Electronic structure of conducting organic polymers: insights from time‐dependent density functional theory

The Ds1(2536)+ Decay Widths in the C3P0 Model

LIGHT MESON DECAY IN THE ${\rm C}\,{}^{3}\!P_{0}$ MODEL

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