CompHEP p,P->t, b -> e, nu, b, b events

 
There are the MC events for the process
p,P->t, b -> e, nu, b, b
generated by CompHEP 41.10 with correct angular distributions
for the final state particles. The contribution of the sea quarks in the initial
state has been included, due to use the u#,d# model (described in hep-ph/0004194).

The subprocesses are included as follow:

PROCESS u# D# -> E1 n1 b B Cross_section 3.166233E-02
PROCESS U# d# -> e1 N1 b B Cross_section 7.328928E-04
PROCESS d# U# -> e1 N1 b B Cross_section 3.163508E-02
PROCESS D# u# -> E1 n1 b B Cross_section 7.336317E-04
Number_of_subprocesses = 4
Total_cross_section_(pb) = 6.476393E-02
Events_mixed_and_randomized = 408988

Parameters of generation:

SQRT(S) 1.960000E 03 GeV
StrFun1: PDF:CTEQ5L(proton)
StrFun2: PDF:CTEQ5L(anti-proton)
QCD scale Q = 175 GeV
Such choice of the scale is based on the paper
hep-ph/9604223

Cuts:
Pt(b1) > 10 GeV
Pt(b2) > 10 GeV
DeltaR(b1,b2) > 0.5

These events and generator are available in enstore system
(e.g. fsgi03.fnal.gov): /pnfs/patriot/Top/tb/

31Kb diagrams.ps - Feynman diagrams
3.6Kb diagrams.tex
1.8Kb prt_1 - protocols of the calculations
1.8Kb prt_2
1.8Kb prt_3
1.8Kb prt_4
110Mb tb_2-4_enbb.pev - mixed and randomized events in native format
for the CompHEP-Pythia interface
233Kb res_tb.tar.gz - generator of MC events. There are c-code of the diagrams, one can compile
it with CompHEP libs ($COMPHEP/nCompil ;$COMPHEP/ld_n).
Precompiled generator for the linux.
batch.dat file to run in batch mode.

If you use these events. please refere 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




Lev V. Dudko e-mail:dudko@fnal.gov
t. 1(630)8408233 http://lev.art.ru
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