Changes between Version 4 and Version 5 of perWeight

Timestamp:

Mar 7, 2016, 11:19:39 AM (9 years ago)

Author:

mosel

Comment:

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perWeight

@@ -5 +5 @@
 (following text is taken - slightly modified - from: O.Buss, PhD thesis, [http://www.uni-giessen.de/cms/fbz/fb07/fachgebiete/physik/einrichtungen/theorie/theorie1/publications/dissertation/buss_diss pdf], Appendix B.1) 
 
-For reactions which are not violent enough to disrupt the whole target nucleus, e.g. low-energy πA, γA or A collision at not too high energies, the  target nucleus stays very close to its ground state. Henceforth, one keeps as an approximation
-the target nucleus constant in time ('frozen approximation'). This basically means that the phase space density of
-the target is not allowed to change during the run. The test-particles which represent this
-constant target nucleus are called ''real'' test-particles. However, one also wants to consider the
-final state particles. Thus one defines another type of test-particles which are called ''perturbative''.
+Reactions which are so violent that they disassemble the whole target nucleus can be treated only by explicitly propagating all particles, the ones in the target and the ones produced in the collision on the same footing.
+
+For reactions which are not violent enough to disrupt the whole target nucleus, e.g. low-energy πA, γA or neutrino A collisions at not too high energies, the  target nucleus stays very close to its ground state. Henceforth, one keeps as an approximation
+the phase-space density of the target nucleus constant in time ('frozen approximation'). In GiBUU this is controlled by the switch `freezeRealParticles`. The test-particles which represent this constant target nucleus are called ''real'' test-particles. However, one also wants to consider the final state particles. Thus one defines another type of test-particles which are called ''perturbative''.
 The ''perturbative'' test-particles are propagated and may collide with ''real'' ones, the products are
 ''perturbative'' particles again. However, ''perturbative'' particles may not scatter among each other.