Problem 358

Summary:	spike in Azimuthal distributions in Gheisha
Product:	Geant4	Reporter:	Isidro.Gonzalez
Component:	processes/hadronic	Assignee:	Hans-Peter.Wellisch
Status:	CLOSED FIXED
Severity:	normal	CC:	Federico.Carminati
Priority:	P5
Version:	4.0
Hardware:	PC
OS:	Linux
URL:	http://i.home.cern.ch/i/iglez/www/alice/HadTests4.0/

Description Isidro.Gonzalez 2002-02-15 02:57:32 CET

The azimuthal distribution of nucleons emited in p+X interactions produces a
spike at phi=0 (pz=0 when shutting in the x direction) for proton energies of
597 MeV and 800 MeV. Between 12% and 18% of the events had at least one such
nucleon.  The fractions of nucleons with pz=0 (exactly) is between 1.1% adn
2.9%.

Comment 1 Hans-Peter.Wellisch 2002-02-25 02:37:59 CET

I saw the plots, concerning the LEP (low energy parametrized) models.
I trust the 2% spike is there. Since it is a small effect, and happens only at
energies far above the spallation energy range it made this low priority,
though.

Comment 2 Hans-Peter.Wellisch 2002-09-06 02:22:59 CEST

Hi Isidro,

  this one is fixed in geant4 4.1.

Many greetings,

Hans-Peter.

Comment 3 Hans-Peter.Wellisch 2002-09-06 02:27:59 CEST

working around a shortcoming of bugzilla. Please ignore....