Z Gamma Gamma production in p p-bar at 1.96 TeV
Author: Alexander Belyaev (belyaev@fnal.gov)
Published Data: 04.02.2003
Category: Z gamma(s)
Print version
z_gam
MC events for the process p,P->Z gamma gamma -> e e- gamma gamma
have
been generated by CompHEP 41.10.
The contribution of sea quarks in the initial state has been
included by using the u#,d# model (described in hep-ph/0004194).
The following subprocesses are included:
PROCESS u# U# -> A A
e1 E1
PROCESS U# u# -> A A
e1 E1
PROCESS d# D# -> A A
e1 E1
PROCESS D# d# -> A A
e1 E1
Particle notation:
E1 - positron
e1 - electron
u# - up-quark (1st and 2nd generation)
U# - up-anti-quark (1st and 2nd generation)
d# - down-quark (1st and 2nd generation)
D# - down-anti-quark (1st and 2nd generation)
Number of subprocesses: 4
Total_cross_section_(pb) = 7.680796E-03
Events_mixed_and_randomized = 83965
Parameters:
SQRT(S) 1.960000E 03 GeV
StrFun1: PDF:CTEQ5L(proton)
StrFun2: PDF:CTEQ5L(anti-proton)
QCD scale Q = 91.187 GeV
#Physical_Parameters
EE = 3.122300000000000E-01
SW = 4.730000000000000E-01
MZ = 9.118840000000000E 01
wZ = 2.494440000000000E 00
#Kinematical_scheme
12 -> 3 , 45
45 -> 4 , 5
#Cuts
*** Table ***
Cuts
Parameter
|
Min bound
|
Max bound
|
t3
|
12
|
|
t4
|
12
|
|
t5
|
12
|
|
t6
|
12
|
|
y3
|
-2.5
|
2.5
|
y4
|
-2.5
|
2.5
|
y5
|
-2.5
|
2.5
|
y6
|
-2.5
|
2.5
|
j34
|
0.4
|
|
j35
|
0.4
|
|
j36
|
0.4
|
|
j45
|
0.4
|
|
j56
|
0.4
|
|
==========================================
Notations:
t# -- pt of the #-th particle
y# -- rapidity of the #-th particle
j -- cone separation of the two particles
#Files:
Available at fsgi cluster, i.e. at fsgi01.fnal.gov, for example,
via
enstore system
at
/pnfs/patriot/ZGamGam/z_gam_gam
files:
2335 Feb 4 14:56 prt_3
--> protocol
2335 Feb 4 14:56 prt_4
--> protocol
2335 Feb 4 14:58 prt_5
--> protocol
2335 Feb 4 14:59 prt_6
--> protocol
23260102 Feb 4 15:28 z_gamma_gamma.PEV -->
83965 mixed and randomized events in native format
for input to the CompHEP-Pythia interface
If you use these events. please refer to:
CompHEP
\bibitem{comphep}
"COMPHEP: A PACKAGE FOR EVALUATION OF FEYNMAN DIAGRAMS AND INTEGRATION
OVER MULTIPARTICLE PHASE SPACE."
By A.~Pukhov, E.~Boos, M.~Dubinin, V.~Edneral, V.~Ilyin, D.~Kovalenko,
A.~Kryukov,
V.~Savrin (Moscow State U.), S.~Shichanin (Serpukhov, IHEP),
A.~Semenov (Dubna, JINR). INP-MSU-98-41-542, Aug 1999. 126pp.
User's manual for version 33. e-Print Archive: hep-ph/9908288;
E.E.~Boos, M.N.~Dubinin, V.A.~Ilyin, A.E.~Pukhov,
and V.I.~Savrin, INP MSU 94-36/358 and SNUTP-94-116, hep-ph/9503280;
P.~Baikov \textit{et al.}, in Proc.\ of the Xth Int.\ Workshop on High
Energy Physics and Quantum Field Theory, QFTHEP-95,
ed.\ by B.~Levtchenko and V.~Savrin, (Moscow, 1995), p.~101.
CompHEP-PYTHIA interface
\bibitem{comphep-pythia}
"CompHEP-PYTHIA interface: integrated package for the collision events
generation based on exact matrix elements"
In the proceedings of the Seventh International Workshop on Advanced
Computing and Analysis Technics in Physics Research (ACAT2000, Fermilab,
October 16-20, 2000),
hep-ph/0101232
Generic User Process Interface
for Event Generators
\bibitem{les-houches}
"Generic User Process Interface for Event Generators"
Physics at TeV Colliders II Workshop, Les Houches, France, May 2001 14
pages, 6 figures,
hep-ph/0109068
==========================
| Alexander S Belyaev HEP,Physics Department
| belyaev@hep.fsu.edu Florida State University
| TEL.: (850) 644-6567 Keen blg. 505,32306-4350
| FAX.: (850) 644-6735 Tallahassee Florida,
==========================
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