Browsing by Author "Liu, Chun-Chu"

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Study of B -> K-0(*)(1430)l(l)over-bar decays
(2007-04-01)
Chen, Chuan-Hung
;
Geng, Chao-Qiang
;
Lih, Chong-Chung
;
Liu, Chun-Chu
;
電子物理學系
We examine the exclusive rare decays of B -> K-0(*)(1430)rho(rho) over bar with K-0(*) (1430) being the p-wave scalar meson and rho = v,e,mu,tau in the standard model. The form factors for the B -> K-0(*) transition matrix elements are evaluated in the light-front quark model. For the decays of B -> K-0(*)rho(rho) over bar the branching ratios are found to be (11.6, 1.63, 1.62, 0.029) X 10(-7) with rho = (v, e, mu, tau) and the integrated longitudinal lepton polarization asymmetries (-0.97, -0.95, 0.03) with rho = (e, mu, tau), respectively.
The effects of Gaussian beams on optical coherence tomography
(2007-01-01)
Liu, Chun-Chu
;
Cheng, Chi-Hsiang
;
Chiu, Chien-Wei
;
Hsu, I-Jen
;
電子物理學系
The theory of optical coherence tomography (OCT) was conventionally considered as the light beams propagating in the system to be in the forms of planar waves. However, the actual behaviors of the light beams in an OCT system are more likely to be Gaussian beams. With the consideration of the light beam passing through the focal lens in the sample arm to be a Gaussian beam, we deduced the theory of OCT in an analytic form. We also simulated and analyzed the interference signals with different positions of the photodetector and the interface in the sample as well as their transverse patterns spectrally. The results were demonstrated by experiments with a Fourier-domain OCT system.
The effects of Gaussian beams on optical coherence tomography - art. no. 66270T
(2007)
Liu, Chun-Chu
;
Cheng, Chi-Hsiang
;
Chiu, Chien-Wei
;
Hsu, I-Jen
;
電子物理學系
The theory of optical coherence tomography (OCT) was conventionally considered as the light beams propagating in the system to be in the forms of planar waves. However, the actual behaviors of the light beams in an OCT system are more likely to be Gaussian beams. With the consideration of the light beam passing through the focal lens in the sample arm to be a Gaussian beam, we deduced the theory of OCT in an analytic form. We also simulated and analyzed the interference signals with different positions of the photodetector and the interface in the sample as well as their transverse patterns spectrally. The results were demonstrated by experiments with a Fourier-domain OCT system.