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BPTOXSGAMMA.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
# 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 myB+ B+
Alias myB- B-
ChargeConj myB+ myB-
Decay Upsilon(4S)
0.5 myB+ B- VSS;
0.5 myB- B+ VSS;
Enddecay
############## PF= 262 MeV
Decay myB+
1.00000 Xsu gamma BTOXSGAMMA 1;
Enddecay
#
Decay myB-
1.00000 anti-Xsu gamma BTOXSGAMMA 1;
Enddecay
#
End

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