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BTOXSGAMMA.DEC
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#
# Mark Williams' non-resonant B->Xs,gamma penguin decays where the
# B is a B0, anti-B0, B+ or B- and the Xs is Xsd, anti-Xsd, Xsu or
# anti-Xsu, respectively. It uses the new BTOXSGAMMA model.
# The mode for JETSET decays is 11 which gives phase-space production
# of hadrons from the available quarks.
# (Note that this could be modified for use with B_s->Xss,gamma decays
# as the BTOXSGAMMA model already allows for B_s radiative penguins.)
#
# Reset some Jetset parameters here rather than recompiling
# Xsd meson (sbar-d system, introduced for b->s gamma decays)
# Set Xsd 3*Charge:
JetSetPar KCHG(455,1)=0
# Set Xsd color information:
JetSetPar KCHG(455,2)=0
# Set Xsd particle/antiparticle distinction:
JetSetPar KCHG(455,3)=1
# Set Xsd mass:
JetSetPar PMAS(455,1)=1.600
# Set Xsd width (sigma):
JetSetPar PMAS(455,2)=0.500
# Set Xsd truncation:
JetSetPar PMAS(455,3)=2.000
# Set Xsd name:
JetSetPar CHAF(455)=Xsd
# Set Xsd so it can decay:
JetSetPar MDCY(455,1)=1
# Set decay table entry pt for Xsd:
JetSetPar MDCY(455,2)=1154
# Number of decay channels for Xsd:
JetSetPar MDCY(455,3)=1
# Switch on Xsd decay
JetSetPar MDME(1154,1)=1
# Phase space decays into hadrons from available quarks
JetSetPar MDME(1154,2)=11
# Xsd decays into two quarks a d and an anti-s
JetSetPar KFDP(1154,1)=-3
JetSetPar KFDP(1154,2)=1
# Xsu meson (sbar-u system, introduced for b->s gamma decays)
# Set Xsu 3*Charge:
JetSetPar KCHG(456,1)=3
# Set Xsu color information:
JetSetPar KCHG(456,2)=0
# Set Xsu particle/antiparticle distinction:
JetSetPar KCHG(456,3)=1
# Set Xsu mass:
JetSetPar PMAS(456,1)=1.600
# Set Xsu width (sigma):
JetSetPar PMAS(456,2)=0.500
# Set Xsu truncation:
JetSetPar PMAS(456,3)=2.000
# Set Xsu name:
JetSetPar CHAF(456)=Xsu
# Set Xsu so it can decay:
JetSetPar MDCY(456,1)=1
# Set decay table entry pt for Xsu:
JetSetPar MDCY(456,2)=1155
# Number of decay channels for Xsu:
JetSetPar MDCY(456,3)=1
# Switch on Xsu decay
JetSetPar MDME(1155,1)=1
# Phase space decays into hadrons from available quarks
JetSetPar MDME(1155,2)=11
# Xsu decays into two quarks a u and an anti-s
JetSetPar KFDP(1155,1)=-3
JetSetPar KFDP(1155,2)=2
Alias myB0 B0
Alias myantiB0 anti-B0
ChargeConj myB0 myantiB0
Alias myB+ B+
Alias myB- B-
ChargeConj myB+ myB-
Decay Upsilon(4S)
0.21000 myB0 anti-B0 VSS_MIX dm;
0.21000 B0 myantiB0 VSS_MIX dm;
0.04000 anti-B0 myantiB0 VSS_MIX dm;
0.04000 B0 myB0 VSS_MIX dm;
0.25 myB+ B- VSS;
0.25 myB- B+ VSS;
Enddecay
Decay myB0
1.0000 Xsd gamma BTOXSGAMMA 1;
Enddecay
Decay myantiB0
1.00000 anti-Xsd gamma BTOXSGAMMA 1;
Enddecay
Decay myB+
1.00000 Xsu gamma BTOXSGAMMA 1;
Enddecay
Decay myB-
1.00000 anti-Xsu gamma BTOXSGAMMA 1;
Enddecay
End

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