CompHEP p,P->W->e, nu events

 
MC events for the process
p,P->W -> e, nu
have been generated by CompHEP 41.10 taking into
account the spin correlations in all decays.
The contribution of sea quarks in the initial
state has been included, due to use the u#,d# model (described in hep-ph/0004194).


The following subprocesses are included:

Upper letters means antiparticles
E1 - positron
e1 - electron
n1 - electron neutrino
G - gluon

PROCESS u# D# -> E1 n1 Cross_section 8.904618E 02
PROCESS U# d# -> e1 N1 Cross_section 1.256895E 02
PROCESS d# U# -> e1 N1 Cross_section 8.905864E 02
PROCESS D# u# -> E1 n1 Cross_section 1.257140E 02
Number_of_subprocesses = 4
Total_cross_section_(pb) = 2.032452E 03
Events_mixed_and_randomized = 485550

You can see how the u#,d# model works
if you look at the results of calculations
for the same process in usual way, each of the subprocesses separately:
PROCESS u D -> E1 n1 Cross_section 8.417817E 02
PROCESS u S -> E1 n1 Cross_section 1.762841E 01
PROCESS U d -> e1 N1 Cross_section 9.649859E 01
PROCESS U s -> e1 N1 Cross_section 2.973142E 00
PROCESS d U -> e1 N1 Cross_section 8.413412E 02
PROCESS d C -> e1 N1 Cross_section 6.684014E 00
PROCESS D u -> E1 n1 Cross_section 9.644535E 01
PROCESS D c -> E1 n1 Cross_section 2.173997E 00
PROCESS c D -> E1 n1 Cross_section 6.689620E 00
PROCESS c S -> E1 n1 Cross_section 2.421827E 01
PROCESS C d -> e1 N1 Cross_section 2.175183E 00
PROCESS C s -> e1 N1 Cross_section 2.421827E 01
PROCESS s U -> e1 N1 Cross_section 1.762133E 01
PROCESS s C -> e1 N1 Cross_section 2.420705E 01
PROCESS S u -> E1 n1 Cross_section 2.971614E 00
PROCESS S c -> E1 n1 Cross_section 2.420705E 01
Number_of_subprocesses = 16
Total_cross_section_(pb) = 2.031835E 03



Parameters of generation:

SQRT(S) 1.960000E 03 GeV
StrFun1: PDF:CTEQ5L(proton)
StrFun2: PDF:CTEQ5L(anti-proton)
QCD scale Q = 40 GeV

Cuts:
50 GeV< M_e nu<120 GeV ( 60<(p_e p_nu)**2<120 )

These events and the generator are available in the enstore system
(e.g. fsgi03.fnal.gov): /pnfs/patriot/W_jets/W/
78MB W_enu_2-2.pev (Mixed and randomized events in native format
for input to the CompHEP-Pythia interface)
24MB W_enu_results.tar.gz (Tar file of all files, including precompiled generator and protocol files.)


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


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