Vector-Like Bottom quark: all possible decay channels



All production sample

Branching ratios:

$m_b'$ $ m_H$ BR(WtWt) BR WtbZ BR bZbZ BR(No Higgs) Br(WtbH) BR(bZbH) BR (1 Higgs) BR bHbH N_inputs/file N files (0 Higgs) N files (1 Higgs) N files (2 Higgs)
200         xx     xx xx 150k -    
250         xx     xx xx 150k -    
300         xx     xx xx 150k -    
350         xx     xx xx 150k -    
400         xx     xx xx 150k -    
450         xx     xx xx 150k -    
500         xx     xx xx 150k -    
550         xx     xx xx 150k -    
600         xx     xx xx 150k -    
650         xx     xx xx 150k -    
700         xx     xx xx 150k -    
750         xx     xx xx 150k -    
800         xx     xx xx 150k -    
850         xx     xx xx 150k -    
900         xx     xx xx 150k -    
950         xx     xx xx 150k -    
1000         xx     xx xx 150k -    

Production jobOptions:

Production Validation plots:

Vector-Like Bottom quark: only b'b' ->bHbZ decay channel


Here is for validation samples for vector-like bottom quark (b') pair production, where b' can decay into tW, bZ and bH. Only b'b'->bHbZ is considered in the following. The sample is generated with Protos2.2 generator (

Running Protos

To generate pair production b'b' events with PROTOS, go to its directory and change to the Rose/BB directory.


Validation has been performed using AtlasProduction-

Test sample

A test sample has been generated, of 5k with $ m_b'=500 $ GeV, $m_H=125 $ GeV. For only bHbZ channel where Z->ll and H->bb are considering.

The LO cross section as a function of b' masses is show in this plot:


A di-lepton mass filter was used, the efficiency is: approx 10.47%

Distributions of Mass, Pt, Eta and Phi of b', Z and H : distributions_bprime_Z_H_7TeV.gif

Distributions of Pt, Eta, Phi of electrons from Z decay: distribution_electronsfromZ_7TeV.gif

Distributions of Pt, Eta, Phi of muons from Z decay: distribution_muonsfromZ_7TeV.gif

Distributions of Pt, Eta, Phi of jet:


Validation plots for other b' mass

* M_b'=300 GeV, 400 GeV, 600 GeV, 700 GeV:,,,

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FirstName Thi Nguyet
LastName Trinh


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GIFgif distribution_electronsfromZ_7TeV.gif r1 manage 16.9 K 2012-07-09 - 15:47 ThiNguyetTrinh  
GIFgif distribution_jets_7TeV.gif r1 manage 15.9 K 2012-07-09 - 15:47 ThiNguyetTrinh  
GIFgif distribution_muonsfromZ_7TeV.gif r1 manage 17.1 K 2012-07-09 - 15:47 ThiNguyetTrinh  
GIFgif distributions_bprime_Z_H_7TeV.gif r1 manage 29.5 K 2012-07-09 - 14:48 ThiNguyetTrinh  
Texttxt r1 manage 1.7 K 2012-07-09 - 13:54 ThiNguyetTrinh  
Compressed Zip archivetgz validation.plotsM300.tgz r1 manage 66.8 K 2012-07-12 - 00:06 ThiNguyetTrinh  
Compressed Zip archivetgz validation.plotsM400.tgz r1 manage 69.7 K 2012-07-12 - 00:14 ThiNguyetTrinh  
Compressed Zip archivetgz validation.plotsM600.tgz r1 manage 72.1 K 2012-07-12 - 00:14 ThiNguyetTrinh  
Compressed Zip archivetgz validation.plotsM700.tgz r1 manage 76.4 K 2012-07-12 - 00:39 ThiNguyetTrinh  
Unknown file formateps xsection_bprime_7TeV.eps r1 manage 9.8 K 2012-07-09 - 14:20 ThiNguyetTrinh  
GIFgif xsection_bprime_7TeV.gif r1 manage 6.8 K 2012-07-09 - 14:25 ThiNguyetTrinh  
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Topic revision: r6 - 2012-07-25 - ThiNguyetTrinh
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