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排序方式: 共有204条查询结果,搜索用时 163 毫秒
101.
Takuya Morozumi Hideaki Okane Hiroki Sakamoto Yusuke Shimizu Kenta Takagi Hiroyuki Umeeda 《中国物理C(英文版)》2018,(2)
We discuss a supersymmetric model with discrete flavor symmetry A_4×Z_3. The additional scalar fields which contribute masses of leptons in the Yukawa terms are introduced in this model. We analyze their scalar potential and find that they have various vacuum structures. We show the relations among 24 different vacua and classify them into two types. We derive expressions of the lepton mixing angles, Dirac CP violating phase and Majorana phases for the two types. The model parameters which are allowed by the experimental data of the lepton mixing angles are different for each type. We also study the constraints on the model parameters which are related to Majorana phases. The different allowed regions of the model parameters for the two types are shown numerically for a given region of two combinations of the CP violating phases. 相似文献
102.
Akaishi Y Myint KS Yamazaki T 《Proceedings of the Japan Academy. Series B, Physical and biological sciences》2008,84(7):264-273
The formation spectra of model KN and KNN systems formed by (K(-),n) reactions are investigated in order to obtain a theoretical basis for a proper interpretation of experimental data concerning kaonic nuclear quasi-bound states. It has been clarified that the experimentally observable kaonic nuclear state K(-)pp should be regarded as the decaying state introduced by Kapur-Peierls, which is different from the pole state solution of the Faddeev equation. 相似文献
103.
Toshimitsu Yamazaki 《Hyperfine Interactions》1983,15(1-4):509-524
104.
Fujimori S Ino A Okane T Fujimori A Okada K Manabe T Yamashita M Kishida H Okamoto H 《Physical review letters》2002,88(24):247601
We report on the results of angle-resolved photoemission experiments on a quasi-one-dimensional (1D) MX-chain compound [Ni(chxn)2Br]Br2, which shows a gigantic nonlinear optical effect. A "band" having about 500 meV energy dispersion is found in the first half of the Brillouin zone, but disappears at kb/pi approximately 1/2. These spectral features are well reproduced by the d-p chain model with a small charge-transfer energy Delta compared with that of 1D Cu-O compounds. We propose that this smaller Delta is the origin of the absence of clear spin-charge separation in the photoemission spectra and the strong nonlinear optical effect. 相似文献
105.
The near- and far-field diffraction due to a circular aperture illuminated with partially coherent light produced by a turbulent
medium has been theoretically studied. Formulations are developed for investigating the near- and far-field diffraction patterns.
The phase structure function, which is generated by the turbulent medium and determines the partially coherent condition of
a light beam passing through it, is assumed to take both the Gaussian form and the 5/3-power law. Numerical results concerning
the far-field intensity distribution and the axial intensity distribution in the near-field region are presented in diagrams
and discussed. 相似文献
106.
Tamao K Tsuji H Terada M Asahara M Yamaguchi S Toshimitsu A 《Angewandte Chemie (International ed. in English)》2000,39(18):3287-3290
107.
108.
Masamichi Tsuboi Akiko Y. Hirakawa Toshimitsu Hoshino Takahiko Ishiguro Katsumi Kimura Shunji Katsumata 《Journal of Molecular Spectroscopy》1976,63(1):80-88
Vibrational structures of four electronic bands of thioformamide were examined: Three were observed at 8.70, 9.30, and 15.52 eV in the photoelectron spectrum, and one was observed at 230 nm in the absorption spectrum. The four corresponding bands of thioformamide-d2 have also been examined. On the Condon approximation, and on the assumption that the vibrations are all harmonic, the amount of shift in the potential minimum along each normal coordinate, which is caused by each electronic transition (ionization or excitation), has been estimated. 相似文献
109.
A series of new blue-phosphorescent iridium(III) complexes 1-14 with ligands of 2-phenylimidazo[1,2-a]pyridine (pip) derivatives were successfully prepared, and their electrochemical, photophysical, and electroluminescent (EL) properties were systematically investigated. It was found that the emission maxima are significantly dependent on the substituents on the phenyl ring in the range of 489-550 nm. For instance, electron-withdrawing groups such as F and CF3 shift the emission maxima to shorter wavelengths by lowering the HOMO levels (complexes 4-8), whereas the extended pi-conjugation leads to bathochromic shifts (2, 3). To obtain further information about the frontier orbital, substitution effects on the imidazole part were also investigated here, and it was found that electron-withdrawing or -donating substituents on the imidazole ring affected the emission maxima (9, 557 nm; 10, 525 nm). These results including their oxidation potentials suggest that the HOMO of the pip-based complex is a mixture of Ir-d, phenyl-pi, and imidazole-pi orbitals. From this viewpoint, combination of electron-withdrawing substituents on the phenyl ring with the use of another ancillary ligand enabled further blue shifts (13, 468, 499 nm; 14, 464, 494 nm). This new system based on pip is one of the rare examples of iridium complexes whose emissions can be tuned to the blue region. Preliminary polymer light-emitting devices (PLEDs) employing the Ir complexes were fabricated, and the devices showed moderate EL efficiencies. 相似文献
110.
Fumio Hiroshima József Lőrinczi Toshimitsu Takaesu 《Journal of Mathematical Analysis and Applications》2012,395(2):437-447
We give a formula in terms of a joint Gibbs measure on Brownian paths and the measure of a random-time Poisson process of the ground state expectations of fractional (in fact, any real) powers of the boson number operator in the Nelson model. We use this representation to obtain tight two-sided bounds. As applications, we discuss the polaron and translation invariant Nelson models. 相似文献