TABLE OF CONTENTS
/winkel_tools [ Modules ]
PURPOSE
Contains the slope b-parameters and other routines used for sampling the angular distributiuons in two-body scattering.
winkel_tools/Cugnon_bpp [ Functions ]
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NAME
real function Cugnon_bpp(plab)
NOTES
b-coefficients from new Cugnon parameterization
INPUTS
- plab -- lab. momentum (GeV/c)
winkel_tools/Cugnon_bnp [ Functions ]
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NAME
real function Cugnon_bnp(plab)
NOTES
b-coefficients from new Cugnon parameterization
INPUTS
- plab --lab. momentum (GeV/c)
winkel_tools/tSlope_Effenb [ Functions ]
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NAME
real function tSlope_Effenb(sqrts)
NOTES
b-coefficient for pp elastic scattering parameterization from J. Cugnon et al., NPA 352, 505 (1981)
INPUTS
- sqrts -- inv. energy (GeV)
winkel_tools/tSlope_PYTHIA [ Functions ]
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NAME
real function tSlope_PYTHIA(sqrts, ID1, ID2)
NOTES
b-coefficient for pp elastic scattering, taken from PYTHIA model, see T. Falter et al., PRC 70, 054609 (2004)
INPUTS
- sqrts -- inv. energy (GeV)
- ID1, ID2 --- ids of colliding particles
winkel_tools/tSlope_EL_pbarp [ Functions ]
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NAME
real function tSlope_EL_pbarp(sqrts)
NOTES
b-coefficient for pbar p elastic scattering, taken from L.A. Kondratyuk and M.G. Sapozhnikov, Sov. J. Nucl. Phys. 46, 56 (1987).
INPUTS
- sqrts -- inv. energy (GeV)
winkel_tools/tSlope_CEX_pbarp [ Functions ]
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NAME
real function tSlope_CEX_pbarp(sqrts)
NOTES
b-coefficient for pbar p --> nbar n charge exchange,
parameterization of available HEP data at plab=0.7-35 GeV/c by A.L.
INPUTS
- sqrts -- inv. energy (GeV)
winkel_tools/dsigdt_LE [ Functions ]
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NAME
function dsigdt_LE (sqrts, prcm) result(costheta)
PURPOSE
Choose LambdaBar polar angle for Nbar N -> LambdaBar Lambda.
INPUTS
- sqrts -- inv. energy (GeV)
- prcm -- c.m. momentum of colliding particles (GeV/c)
OUTPUT
- costheta -- cosine of the polar angle
NOTES
The fit by Theodoros Gaitanos is used: dSigDt = a0 + a1*exp(a2*(tmin-t)). The angle is chosen with respect to the Nbar c.m. momentum. Valid at p_lab < 1.8 GeV/c.
winkel_tools/dsigdt_Regge [ Functions ]
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NAME
function dsigdt_Regge (sqrts, prcm, n) result (costheta)
PURPOSE
Choose the antihyperon polar angle for Nbar N -> Ybar Y.
INPUTS
- sqrts -- inv. energy (GeV)
- prcm -- c.m. momentum of colliding particles (GeV/c)
- n = 1 --- choose LambdaBar polar angle for Nbar N -> LambdaBar Lambda = 2 --- choose LambdaBar polar angle for Nbar N -> LambdaBar Sigma or Lambda polar angle for Nbar N -> SigmaBar Lambda
OUTPUT
- costheta -- cosine of the polar angle
NOTES
The angle is chosen with respect to the Nbar c.m. momentum for outgoing LambdaBar or with respect to the N c.m. momentum for outgoing Lambda. Used phenomenological Regge-like fit from B. Sadoulet, CERN-HERA 69-2 : dSigDt \propto sigma*a*exp(a*t)*c**(2.*alpha) + tau*b**2/4.*sqrt(-t)*exp(-b*sqrt(-t))*c**(2.*beta) Valid at p_lab > 1.8 GeV/c