Differences

This shows you the differences between two versions of the page.

Link to this comparison view

preprints:2009:ttp09-02 [2016/03/17 11:03] (current)
Line 1: Line 1:
 +====== TTP09-02 NNLO vertex corrections in charmless hadronic B decays: Real part ====== 
 +  
 +  
 +   <​hidden TTP09-02 ​ NNLO vertex corrections in charmless hadronic B decays: Real part > We compute the real part of the 2-loop vertex corrections for charmless 
 + ​hadronic B decays, completing the NNLO calculation of the topological 
 + tree amplitudes in QCD factorization. Among the technical aspects we 
 + show that the hard-scattering kernels are free of soft and collinear 
 + ​infrared divergences at the 2-loop level, which follows after an 
 + ​intricate subtraction procedure involving evanescent four quark 
 + ​operators. The numerical impact of the considered corrections is found 
 + to be moderate, whereas the factorization scale dependence of the 
 + ​topological tree amplitudes is significantly reduced at NNLO. We in 
 + ​particular do not find an enhancement of the phenomenologically 
 + ​important ratio |C/T| from the perturbative calculation.  
 + </​hidden>​ 
 +|**Guido Bell** ​ |  
 +|**  Nucl.Phys. ​ B822 172-200 2009  **  | 
 +| {{preprints:​2009:​ttp09-02.pdf|PDF}} {{preprints:​2009:​ttp09-02.ps|PostScript}} [[http://​arxiv.org/​abs/​0902.1915|arXiv]] ​  | 
 +| |