Single-channel noise reduction algorithms for speech enhancement

三體重子粲夸克B衰變之研究

陳俊宏(Chun-Hung Chen)

指導教授 ： 耿朝強

國立清華大學/理學院/物理學系/博士(2009年)

https://doi.org/10.6843/NTHU.2009.00038

摘要

There are several salient features of the charmless three-body baryonic B decays. The so-called threshold effect indicates that the B meson is preferred to decay into a
baryon-antibaryon pair with low invariant mass accompanied by a fast recoil meson.This effect can be understood in terms of a simple short-distance picture. One energetic q ar q
pair must be emitted back to back by a hard gluon in order to produce a baryon and an
antibaryon in the two-body decay. The study of the charmful baryonic B decays may help
improve our understanding of underlying mechanism for threshold enhancement and the angular distribution in the three-body decays. Theoretically, the relevant topologic quark diagrams for charmful decays are simpler than the charmless ones as the latter receive
not only tree bot also penguin contributions. In this thesis,we shall therefore focus on
B o mathbf{B ar B'}M_c with M_c = D^(*) or J/psi, and our first task is to see if we can explain the branching fractions.

關鍵字

粲夸克

並列摘要

無資料

並列關鍵字

charmful

參考文獻

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