Prof. J. E. B. Warming

Short Distance Analysis of ¯ B → D (∗)0 e + e − and ¯ B → J/ψe + e −

Over a large fraction of phase space a combination of an operator product and heavy quark expansions effectively turn the decay B̄ → D(∗)0e+e− into a “short distance” process, i.e., one in which the weak and electromagnetic interactions occur through single local operators. These processes have an underlying W-exchange quark diagram topology and are therefore Cabibbo allowed but suppressed by co...

Prof. Dr. Prof. Prof.

Berg, B. van den, Grievink, L., IJzermans, J., Lebret, E

INTRODUCTION Many studies have examined the health problems among survivors of disasters, showing that the most frequently reported symptoms after disasters are mental health problems, such as posttraumatic stress symptoms, depression, and anxiety (1, 2). In the last decade, the Netherlands was struck by a few national disasters. On October 4, 1992, an El Al Boeing 747 airplane crashed into two...

6 . 042 J / 18 . 062 J , Fall ’ 05 : Mathematics for Computer Science October 3 Prof . Albert

A 1994 University of Chicago study entitled The Social Organization of Sexuality found that on average men have 74% more opposite­gender partners than women, confirming a view that men are more promiscuous. But whoever reported this finding was lying or confused! We’ll show you how to use the properties of vertex degrees in a graph to prove this. Let’s recast opposite­gender partnering in graph...

B?J/?(?,K) Decays within QCD Factorization Approach

We used QCD factorization for the hadronic matrix elements to show that the existing data, in particular the branching ratios BR ( ?J/?K) and BR ( ?J/??), can be accounted for this approach. We analyzed the decay within the framework of QCD factorization. We have complete calculation of the relevant hard-scattering kernels for twist-2 and twist-3. We calculated this decays in a special scale ...