Changes between Initial Version and Version 1 of GluonSpin


Ignore:
Timestamp:
03/20/12 16:16:53 (8 years ago)
Author:
trac
Comment:

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  • GluonSpin

    v1 v1  
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     3== The BZ angle in e+ e-  -> 4jets: abelian vs non-abelian ==
     4
     5Use MadGraph/MadEvent to produce two event samples,
     6one for standard QCD and one with an abelian QCD model for
     7
     8
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     10Run the collision on the peak of the Z boson and set a minimum invariant mass
     11for the jets of %$m_{jj}>10$% GeV. Plot the
     12Bengtsson-Zerwas angle between the planes identified by the two lowest and to highest
     13energy jets:
     14
     15%$
     16\cos \chi_{BZ} =
     17\frac{( {\bf p}''1\times {\bf p}''2) \cdot  ({\bf p}''3\times {\bf p}''4)}
     18{||{\bf p}''1 \times {\bf p}''2 || ||{\bf p}''3\times {\bf p}''4||}\,.
     19$%
     20
     21Comparison should be made with the plots of Ref. [http://arxiv.org/abs/hep-ph/9503354 hep-ph/9503354],
     22where various implementation of the abelian models are discussed. Our web implementation include the emission of abelian gluons as possible partons leading to jets.
     23
     24
     25-- Main.FabioMaltoni - 29 Aug 2007
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