Changes between Initial Version and Version 1 of GluonSpin

Timestamp:

Mar 20, 2012, 4:16:53 PM (14 years ago)

Author:

trac

Comment:

--

GluonSpin

@@ +1 @@
+
+
+== The BZ angle in e+ e-  -> 4jets: abelian vs non-abelian ==
+
+Use MadGraph/MadEvent to produce two event samples,
+one for standard QCD and one with an abelian QCD model for
+
+
+
+Run the collision on the peak of the Z boson and set a minimum invariant mass
+for the jets of %$m_{jj}>10$% GeV. Plot the
+Bengtsson-Zerwas angle between the planes identified by the two lowest and to highest 
+energy jets:
+
+%$
+\cos \chi_{BZ} = 
+\frac{( {\bf p}''1\times {\bf p}''2) \cdot  ({\bf p}''3\times {\bf p}''4)}
+{||{\bf p}''1 \times {\bf p}''2 || ||{\bf p}''3\times {\bf p}''4||}\,.
+$%
+
+Comparison should be made with the plots of Ref. [http://arxiv.org/abs/hep-ph/9503354 hep-ph/9503354], 
+where various implementation of the abelian models are discussed. Our web implementation include the emission of abelian gluons as possible partons leading to jets. 
+
+
+-- Main.FabioMaltoni - 29 Aug 2007
+
+
+
+
+