TABLE OF CONTENTS
/twoBodyPhaseSpace [ Modules ]
NAME
module twoBodyPhaseSpace
NOTES
Includes all the routines which are necessary for the two-body phase-space.
twoBodyPhaseSpace/setMaxSqrts [ Subroutines ]
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NAME
subroutine setMaxSqrts(srtsMax)
PURPOSE
set the upper bound of the tabulation
twoBodyPhaseSpace/Integrate_2bodyPS_resonance [ Functions ]
[ Top ] [ twoBodyPhaseSpace ] [ Functions ]
NAME
function Integrate_2bodyPS_resonance (resID, srts, massStable, scalarPotential) result (ps)
PURPOSE
Returns Integral over the CM-momentum with a resonance among the two particles. Therefore one has to Integrate over the mass of the resonance as well:
ps=Integral { p_final(m_R) * Spectral function(m_R} d(m_R)
with
m_R = massResonance
It uses an internal routine "Calculate" which is either called directly or we store its values to a field.
This routine is not giving the real Phase space !!!
INPUTS
- integer, intent(in) :: resID -- Id of the resonance
- real, intent(in) :: srts -- sqrt(s) in the problem
- real, intent(in) :: massStable -- mass of the stable particle
- real, intent(in) :: scalarPotential -- scalarPotential of the resonance
OUTPUT
- real,dimension(1:5) :: ps -- Integral as given above
Here the different components are:
- ps(1): With full width evaluated in the nominator of spectral function
- ps(2): With partial width (pion N) evaluated in the nominator of spectral function
- ps(3): With partial width (eta N) evaluated in the nominator of spectral function
- ps(4): With partial width (rho N) evaluated in the nominator of spectral function
- ps(5): With partial width (omega N) evaluated in the nominator of spectral function
NOTES
Formerly known as "massInt2"
twoBodyPhaseSpace/nnRR [ Subroutines ]
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NAME
real function nnRR (srts, ID)
PURPOSE
Procedure for calculation of integrals of Resonance Resonance' CM-momentum
Evaluates Integral over two body phase space in vacuum for two baryon resonances. Therefore one has to Integrate over the mass of the two resonances as well.
ps=Integral d(mass_A ) d(mass_B ) p_AB * Spectralfunction_A Spectralfunction_B
INPUTS
- integer :: ID(1:2) -- Ids of the resonances
- real :: srts -- sqrt(s) of the reaction
OUTPUT
- Integral as given above
NOTES
To increase speed, we tabulate the possible output for Delta+R.