LEPTO
LEPTO 6.3
LEPTO 6.30 950717 00.00 CERN Program Library W5045 LEPTO
Lund Montecarlo for deep inelastic lepton-nucleon scattering
Author: Gunnar Ingelman, Theory Group/DESY
C######################################################################C
C C
C The Lund Monte Carlo for Deep Inelastic Lepton-Nucleon Scattering C
C C
C L E P T O C
C C
C version 6.3, July 17, 1995 C
C Authors: C
C Gunnar Ingelman, DESY theory group Dept. of Radiation Sciences C
C (room 202 bldg 2a) Uppsala University C
C D-22603 Hamburg, FRG S-751 21 Uppsala, Sweden C
C phone: +49(40)8998-2795 +46(18)18-3884 C
C fax: -2777 -3833 C
C e-mail: ingelman@desy.de (ingelman@tsl.uu.se) C
C Johan Rathsman, Dept. of Radiation Sciences, rathsman@tsl.uu.se C
C Anders Edin, Dept. of Radiation Sciences, edin@tsl.uu.se C
C C
C Contributions on parton cascades: M. Bengtsson, T. Sjostrand C
C C
C Availability: on request or from DESY IBM and VAX/VMS systems: C
C DESY IBM library VXDESY directory content C
C T00ING.LUND(member) DISK$T__:[INGELMAN.LUND] C
C LEPTOINF LEPTO.INFO info, news, updates C
C LEPTOPS LEPTO.PS manual, post script C
C LEPTO63 LEPTO63.FOR source code C
C LEPTODEM LEPTODEM.FOR demo program C
C LEPTODEM.COM demo command file C
C T00ING.OBJECT(LEPTO63) LEPTO63.OBJ object code C
C C
C Manual: see file above (DESY preprint in preparation), see also C
C G. Ingelman, Uppsala preprint TSL/ISV 92-0065 and in C
C "Physics at HERA", Eds. W. Buchmueller, G. Ingelman, C
C DESY Hamburg 1992, vol. 3, p. 1366 C
C C
C Please report any problems or suggestions for improvements. C
C C
C######################################################################C
Updates/changes in version 6.3
Compared to LEPTO 6.2 the changes/updates are
- New treatment of sea quarks in the target remnant, see section 2.7
and LST(35).
- Implemented a model for soft colour interactions (SCI) \cite{SCI}, as
a mechanism to understand rapidity gap events, see section 2.8 and
LST(34), PARL(7).
- New default values for PARL(8),PARL(9),PARL(10) and PYPAR(22) in
connection with having SCI as default.
- Corrected a few bugs.
- Modified routines are LEPTOD, LINIT, LEPTO, LKINEM, LFRAME,
LSHOWR, LMEPS, LYSSPA. New routines are LSCI, LECSWI, LEASWI.
(To get the new physics introduced, it is also possible to use
LEPTO version 6.2 and replacing LEPTOD, LEPTO, LYSSPA and
adding LSCI, LECSWI, LEASWI from version 6.3.)
Compared to LEPTO 6.1 the changes/updates are
- Introduced non-zero lepton mass in kinematical formulae used.
- New default value of $sin^2\theta_W$, see PARL(5).
- Uupdate of parton density parametrisations, see LST(15)and LST(16).
- Introduced option to simulate scattering on intrinsic charm
quarks, see LST(15).
- Additional options, and new default, for use of grid to store
probabilities for $qg$- and $q\bar{q}$-events, see LST(19).
- Additional options for applying cut-offs against divergences in QCD
matrix elements, see LST(20).
- New default values for QCD matrix element cutoffs PARL(8) and PARL(9).
- New parameter PARL(10) for parton showers added on ME.
- Additional options of maximum virtuality for parton showers, see LST(9).
- Additional options, and new default, for treatment of the nucleon
target remnant, see LST(14).
- Internal flag previously in LST(20) moved to LST(32), PARL(20) removed.
- Changed PY... to LY... in routine and common block names to avoid
name clashes with {\sc Pythia}.
- Corrected bug in treatment of azimuthal angle dependence in first order
QCD matrix elements.
LEPTO 6.2
LEPTO 6.20 950222 00.00 CERN Program Library W5045 LEPTO
Lund Montecarlo for deep inelastic lepton-nucleon scattering
Author: Gunnar Ingelman, Theory Group/DESY
C######################################################################C
C C
C The Lund Monte Carlo for Deep Inelastic Lepton-Nucleon Scattering C
C C
C L E P T O C
C C
C version 6.2, February 22, 1995 C
C C
C Author: Gunnar Ingelman C
C DESY theory group Dept. of Radiation Sciences C
C (room 202 bldg 2a) Uppsala University C
C Notkestrasse 85 Box 535 C
C D-22603 Hamburg, Germany S-751 21 Uppsala, Sweden C
C phone: +49(40)8998-2795 +46(18)18-3884 C
C telefax: -2777 -3833 C
C e-mail: ingelman@desy.de (ingelman@tsl.uu.se) C
C C
C Contributions on parton cascades: M. Bengtsson, T. Sjostrand C
C C
C Availability: on request or from DESY IBM and VAX/VMS systems: C
C DESY IBM library VXDESY directory content C
C T00ING.LUND(member) DISK$T__:[INGELMAN.LUND] C
C LEPTOINF LEPTO.INFO info, news, updates C
C LEPTOTEX LEPTO.TEX manual in LaTeX C
C LEPTO62 LEPTO62.FOR source code C
C LEPTODEM LEPTODEM.FOR demo program C
C LEPTODEM.COM demo command file C
C T00ING.OBJECT(LEPTO62) LEPTO62.OBJ object code C
C C
C Manual: see file above (DESY preprint in preparation), see also C
C G. Ingelman, Uppsala preprint TSL/ISV 92-0065 and in C
C "Physics at HERA", Eds. W. Buchmueller, G. Ingelman, C
C DESY Hamburg 1992, vol. 3, p. 1366 C
C C
C Please report any problems or suggestions for improvements. C
C C
C######################################################################C
Updates/changes in version 6.2
Compared to LEPTO 6.1 the following changes have been made:
- introduced non-zero lepton mass in kinematical formulae used.
- new default value of $sin^2\theta_W$, see PARL(5).
- update of parton density parametrisations, see LST(15)and LST(16).
- introduced option to simulate scattering on intrinsic charm
quarks, see LST(15).
- additional options, and new default, for use of grid to store
probabilities for $qg$- and $q\bar{q}$-events, see LST(19).
- additional options for applying cut-offs against divergences in QCD
matrix elements, see LST(20).
- new default values for QCD matrix element cutoffs PARL(8) and PARL(9).
- new parameter PARL(10) for parton showers added on ME.
- additional options of maximum virtuality for parton showers, see LST(9).
- additional options, and new default, for treatment of the nucleon
target remnant, see LST(14).
- internal flag previously in LST(20) moved to LST(32), PARL(20) removed.
- changed PYxxxx to LYxxxx in routine and common block names to avoid
name clashes with Pythia.
- corrected bug in treatment of azimuthal angle dependence in first order
QCD matrix elements.
CERN Program Library
