zprime missing in some events in p p > zp > mu+ mu-
Hi,
I am trying to produce events for p p > zp > mu+ mu- where zp is a z prime.
Unfortunately when I look into the lhe file some of the event don't have the z prime.
So a normal event looks like
<event>
5 0 0.3197600E-03 0.9564319E+03 0.7812500E-02 0.9357664E-01
1 -1 0 0 501 0 0.00000000000E+00 0.00000000000E+00 0.59127567877E+03 0.59127567879E+03 0.48000000000E-02 0. -1.
-1 -1 0 0 0 501 0.00000000000E+00 0.00000000000E+00 -0.38677475840E+03 0.38677475843E+03 0.48000000000E-02 0. 1.
32 2 1 2 0 0 0.00000000000E+00 0.00000000000E+00 0.20450092037E+03 0.97805043723E+03 0.95643192718E+03 0. 0.
-13 1 3 3 0 0 -0.66035213723E+02 -0.15664998222E+03 0.55933311896E+03 0.58459679739E+03 0.10566000000E+00 0. -1.
13 1 3 3 0 0 0.66035213723E+02 0.15664998222E+03 -0.35483219859E+03 0.39345363984E+03 0.10566000000E+00 0. 1.
</event>
but about 1% of the events look like
<event>
4 0 0.3197600E-03 0.4117054E+03 0.7812500E-02 0.1039800E+00
1 -1 0 0 501 0 0.00000000000E+00 0.00000000000E+00 0.13475090071E+03 0.13475090079E+03 0.48000000000E-02 0. -1.
-1 -1 0 0 0 501 0.00000000000E+00 0.00000000000E+00 -0.31447169469E+03 0.31447169473E+03 0.48000000000E-02 0. 1.
-13 1 1 2 0 0 0.17895769471E+03 0.27311077528E+02 0.17067639396E+02 0.18183252441E+03 0.10566000000E+00 0. 1.
13 1 1 2 0 0 -0.17895769471E+03 -0.27311077528E+02 -0.19678843338E+03 0.26739007111E+03 0.10566000000E+00 0. -1.
</event>
I have absolutely no idea why that is. I would appreciate your help.
I can also provide the model I'm using in case you need to take a look.
Cheers,
F. Poncza
Param Card:
#######
## PARAM_CARD AUTOMATICALY GENERATED BY MG5 FOLLOWING UFO MODEL ####
#######
## ##
## Width set on Auto will be computed following the information ##
## present in the decay.py files of the model. ##
## See arXiv:1402.1178 for more details. ##
## ##
#######
#######
## INFORMATION FOR CKM
#######
Block ckm
1 9.741900e-01 # Vud
2 2.257000e-01 # Vus
3 3.590000e-03 # Vub
4 4.150000e-02 # Vcb
5 2.960000e-05 # JarlsJ
#######
## INFORMATION FOR MASS
#######
Block mass
1 4.800000e-03 # MD
2 2.300000e-03 # MU
3 9.500000e-02 # MS
4 1.275000e+00 # MC
5 4.180000e+00 # MB
6 1.730700e+02 # MT
11 5.110000e-04 # Me
13 1.056600e-01 # MMU
15 1.777000e+00 # MTA
23 9.118760e+01 # MZ
25 1.259000e+02 # MH
32 1.000000e+03 # MZp
## Dependent parameters, given by model restrictions.
## Those values should be edited following the
## analytical expression. MG5 ignores those values
## but they are important for interfacing the output of MG5
## to external program such as Pythia.
12 0.000000 # ve : 0.0
14 0.000000 # vm : 0.0
16 0.000000 # vt : 0.0
21 0.000000 # g : 0.0
22 0.000000 # a : 0.0
24 79.838164 # w+ : cmath.sqrt(
#######
## INFORMATION FOR SMINPUTS
#######
Block sminputs
1 1.280000e+02 # aEWM1
2 1.166379e-05 # Gf
3 1.185000e-01 # aS
#######
## INFORMATION FOR ZPINPUT
#######
Block zpinput
1 3.703506e-01 # gx
#######
## INFORMATION FOR DECAY
#######
DECAY 6 1.499743e+00 # WT
DECAY 23 2.413102e+00 # WZ
DECAY 24 2.003576e+00 # WW
DECAY 25 4.969156e-03 # WH
DECAY 32 2.914237e+01 # WZp
## Dependent parameters, given by model restrictions.
## Those values should be edited following the
## analytical expression. MG5 ignores those values
## but they are important for interfacing the output of MG5
## to external program such as Pythia.
DECAY 1 0.000000 # d : 0.0
DECAY 2 0.000000 # u : 0.0
DECAY 3 0.000000 # s : 0.0
DECAY 4 0.000000 # c : 0.0
DECAY 5 0.000000 # b : 0.0
DECAY 11 0.000000 # e- : 0.0
DECAY 12 0.000000 # ve : 0.0
DECAY 13 0.000000 # mu- : 0.0
DECAY 14 0.000000 # vm : 0.0
DECAY 15 0.000000 # ta- : 0.0
DECAY 16 0.000000 # vt : 0.0
DECAY 21 0.000000 # g : 0.0
DECAY 22 0.000000 # a : 0.0
#======
# QUANTUM NUMBERS OF NEW STATE(S) (NON SM PDG CODE)
#======
Block QNUMBERS 32 # zp
1 0 # 3 times electric charge
2 3 # number of spin states (2S+1)
3 1 # colour rep (1: singlet, 3: triplet, 8: octet)
4 0 # Particle/
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