Onia Processes
Production of J/psi or Upsilon, directly and via chi states and the
colour-octet mechanism.
In each process the square-bracketed expression specifies the state
in spectroscopic notation, (2S+1) L J, followed by
(1) for colour-singlet states and (8) for
colour-octet ditto.
The original Fortran code for these processes has been contributed
by Stefan Wolf [unpublished]; for the C++ version only the unpolarized
expressions are retained.
The description of
final-state radiation
is in this case based on some further model assumptions.
Charmonium
flag name="Charmonium:all" default="off"
Common switch for the group of charmonium production.
flag name="Charmonium:gg2QQbar[3S1(1)]g" default="off"
g g -> ccbar[3S1(1)] g.
Code 401.
flag name="Charmonium:gg2QQbar[3P0(1)]g" default="off"
g g -> ccbar[3P0(1)] g.
Code 402.
flag name="Charmonium:gg2QQbar[3P1(1)]g" default="off"
g g -> ccbar[3P1(1)] g.
Code 403.
flag name="Charmonium:gg2QQbar[3P2(1)]g" default="off"
g g -> ccbar[3P2(1)] g.
Code 404.
flag name="Charmonium:qg2QQbar[3P0(1)]q" default="off"
q g -> ccbar[3P0(1)] q.
Code 405.
flag name="Charmonium:qg2QQbar[3P1(1)]q" default="off"
q g -> ccbar[3P1(1)] q.
Code 406.
flag name="Charmonium:qg2QQbar[3P2(1)]q" default="off"
q g -> ccbar[3P2(1)] q.
Code 407.
flag name="Charmonium:qqbar2QQbar[3P0(1)]g" default="off"
q qbar -> ccbar[3P0(1)] g.
Code 408.
flag name="Charmonium:qqbar2QQbar[3P1(1)]g" default="off"
q qbar -> ccbar[3P1(1)] g.
Code 409.
flag name="Charmonium:qqbar2QQbar[3P2(1)]g" default="off"
q qbar -> ccbar[3P2(1)] g.
Code 410.
flag name="Charmonium:gg2QQbar[3S1(8)]g" default="off"
g g -> ccbar[3S1(8)] g.
Code 411.
flag name="Charmonium:gg2QQbar[1S0(8)]g" default="off"
g g -> ccbar[3S1(8)] g.
Code 412.
flag name="Charmonium:gg2QQbar[3PJ(8)]g" default="off"
g g -> ccbar[3S1(8)] g.
Code 413.
flag name="Charmonium:qg2QQbar[3S1(8)]q" default="off"
q g -> ccbar[3S1(8)] q.
Code 414.
flag name="Charmonium:qg2QQbar[1S0(8)]q" default="off"
q g -> ccbar[3S1(8)] q.
Code 415.
flag name="Charmonium:qg2QQbar[3PJ(8)]q" default="off"
q g -> ccbar[3S1(8)] q.
Code 416.
flag name="Charmonium:qqbar2QQbar[3S1(8)]g" default="off"
q qbar -> ccbar[3S1(8)] g.
Code 417.
flag name="Charmonium:qqbar2QQbar[1S0(8)]g" default="off"
q qbar -> ccbar[3S1(8)] g.
Code 418.
flag name="Charmonium:qqbar2QQbar[3PJ(8)]g" default="off"
q qbar -> ccbar[3S1(8)] g.
Code 419.
Bottomonium
flag name="Bottomonium:all" default="off"
Common switch for the group of charmonium production.
flag name="Bottomonium:gg2QQbar[3S1(1)]g" default="off"
g g -> bbbar[3S1(1)] g.
Code 501.
flag name="Bottomonium:gg2QQbar[3P0(1)]g" default="off"
g g -> bbbar[3P0(1)] g.
Code 502.
flag name="Bottomonium:gg2QQbar[3P1(1)]g" default="off"
g g -> bbbar[3P1(1)] g.
Code 503.
flag name="Bottomonium:gg2QQbar[3P2(1)]g" default="off"
g g -> bbbar[3P2(1)] g.
Code 504.
flag name="Bottomonium:qg2QQbar[3P0(1)]q" default="off"
q g -> bbbar[3P0(1)] q.
Code 505.
flag name="Bottomonium:qg2QQbar[3P1(1)]q" default="off"
q g -> bbbar[3P1(1)] q.
Code 506.
flag name="Bottomonium:qg2QQbar[3P2(1)]q" default="off"
q g -> bbbar[3P2(1)] q.
Code 507.
flag name="Bottomonium:qqbar2QQbar[3P0(1)]g" default="off"
q qbar -> bbbar[3P0(1)] g.
Code 508.
flag name="Bottomonium:qqbar2QQbar[3P1(1)]g" default="off"
q qbar -> bbbar[3P1(1)] g.
Code 509.
flag name="Bottomonium:qqbar2QQbar[3P2(1)]g" default="off"
q qbar -> bbbar[3P2(1)] g.
Code 510.
flag name="Bottomonium:gg2QQbar[3S1(8)]g" default="off"
g g -> bbbar[3S1(8)] g.
Code 511.
flag name="Bottomonium:gg2QQbar[1S0(8)]g" default="off"
g g -> bbbar[3S1(8)] g.
Code 512.
flag name="Bottomonium:gg2QQbar[3PJ(8)]g" default="off"
g g -> bbbar[3S1(8)] g.
Code 513.
flag name="Bottomonium:qg2QQbar[3S1(8)]q" default="off"
q g -> bbbar[3S1(8)] q.
Code 514.
flag name="Bottomonium:qg2QQbar[1S0(8)]q" default="off"
q g -> bbbar[3S1(8)] q.
Code 515.
flag name="Bottomonium:qg2QQbar[3PJ(8)]q" default="off"
q g -> bbbar[3S1(8)] q.
Code 516.
flag name="Bottomonium:qqbar2QQbar[3S1(8)]g" default="off"
q qbar -> bbbar[3S1(8)] g.
Code 517.
flag name="Bottomonium:qqbar2QQbar[1S0(8)]g" default="off"
q qbar -> bbbar[3S1(8)] g.
Code 518.
flag name="Bottomonium:qqbar2QQbar[3PJ(8)]g" default="off"
q qbar -> bbbar[3S1(8)] g.
Code 519.
Onium matrix elements
The implementation of charmonium and bottomonium production, including
the colour-octet production mechanism, requires information on NRQCD
matrix elements for the various wavefunctions involved. Default values
for these are encoded in the following ten variables. They
are taken from [Nas00]; see also [Bar06].
parm name="SigmaQCD:OJpsi3S11" default="1.16" min="0.0"
<O(J/psi)[3S1(1)]>.
parm name="SigmaQCD:OJpsi3S18" default="0.0119" min="0.0"
<O(J/psi)[3S1(8)]>.
parm name="SigmaQCD:OJpsi1S08" default="0.01" min="0.0"
<O(J/psi)[1S0(8)]>.
parm name="SigmaQCD:OJpsi3P08" default="0.01" min="0.0"
<O(J/psi)[3P0(8)]>/m_c^2.
parm name="SigmaQCD:Ochic03P01" default="0.05" min="0.0"
<O(chi_c0)[3P0(8)]>/m_c^2.
parm name="SigmaQCD:OUpsilon3S11" default="9.28" min="0.0"
<O(Upsilon)[3S1(1)]>.
parm name="SigmaQCD:OUpsilon3S18" default="0.15" min="0.0"
<O(Upsilon)[3S1(8)]>.
parm name="SigmaQCD:OUpsilon1S08" default="0.02" min="0.0"
<O(Upsilon)[1S0(8)]>.
parm name="SigmaQCD:OUpsilon3P08" default="0.48" min="0.0"
<O(Upsilon)[3P0(8)]>/m_b^2.
parm name="SigmaQCD:Ochib03P01" default="0.09" min="0.0"
<O(chi_b0)[3P0(8)]>/m_b^2.