Differences

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

Link to this comparison view

preprints:2009:ttp09-27 [2016/03/17 11:03] (current)
Line 1: Line 1:
 +====== TTP09-27 Tree-level contributions to the rare B+ --> X+ nu nu bar decays in the Standard Model ====== 
 +  
 +  
 +   <​hidden TTP09-27 ​ Tree-level contributions to the rare B+ --> X+ nu nu bar decays in the Standard Model > The tree-level contributions to the rare decays B+ --> pi+ nu anti-nu, B+ --> K+ nu anti-nu, and B+ --> K*+ nu anti-nu are analyzed and compared to those occurring in K+ --> pi+ nu anti-nu, D+ --> pi+ nu anti-nu, and Ds+ --> pi+ nu anti-nu. It is shown that these purely long-distance contributions,​ arising from the exchange of a charged lepton, can be significant in B+ decays for an intermediate tau, potentially blurring the distinction between the modes used to extract B --> tau nu and those used to probe the genuine short-distance b --> (s,d) nu anti-nu FCNC transitions. Numerically,​ the tree-level contributions are found to account for 97%, 12% and 14% of the total B+ --> pi+ nu anti-nu, B+ --> K+ nu anti-nu, and B+ --> K*+ nu anti-nu rates, respectively. 
 + </​hidden>​ 
 +|**Jernej F. Kamenik and Christopher Smith** ​ |  
 +|**  Phys.Lett. ​ B680 471-475 2009  **  | 
 +| {{preprints:​2009:​ttp09-27.pdf|PDF}} {{preprints:​2009:​ttp09-27.ps|PostScript}} [[http://​arxiv.org/​abs/​0908.1174|arXiv]] ​  | 
 +| |