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126 lines
2.7 KiB
126 lines
2.7 KiB
subroutine pvBtensor(q1,m1s,m2s,FB0,FB1,FB2,FB3,FB4,FB5,FB6)
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implicit none
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C q1 is the momentum in the loop = p1 the external momenta
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C m1s,m2s are the squares of the internal masses
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include 'lib/TensorReduction/Include/types.f'
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include 'lib/TensorReduction/Include/pvBnames.f'
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include 'lib/TensorReduction/Include/pvBv.f'
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include 'lib/TensorReduction/Include/TRydef.f'
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include 'lib/TensorReduction/Include/TRmetric.f'
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complex(dp):: FB0(-2:0),FB1(y1max,-2:0),
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. FB2(y2max,-2:0),FB3(y3max,-2:0),FB4(y4max,-2:0),FB5(y5max,-2:0)
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. ,FB6(y6max,-2:0)
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real(dp)::q1(4),q1Dq1,m1s,m2s
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real(dp)::pvSDDP,pvSDDDD,pvSDDPP,pvSDDDDP,pvSDDPPP,
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. pvSDDDDPP,pvSDDPPPP,pvSDDDDDD
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integer::n1,n2,n3,n4,n5,n6,ep,B0i,pvBcache
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logical,save:: first=.true.
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!$omp threadprivate(first)
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if (first) then
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first=.false.
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call pvarraysetup
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endif
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q1Dq1=q1(4)**2-q1(1)**2-q1(2)**2-q1(3)**2
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B0i=pvBcache(q1Dq1,m1s,m2s)
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do ep=-2,0
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FB0(ep)=Bv(B0i+bb0,ep)
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enddo
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do ep=-2,0
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do n1=1,4
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FB1(n1,ep)=Bv(B0i+bb1,ep)*q1(n1)
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enddo
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enddo
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do ep=-2,0
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do n1=1,4
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do n2=n1,4
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FB2(y2(n1,n2),ep)=q1(n1)*q1(n2)*Bv(B0i+bb11,ep)
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. +g(n1,n2)*Bv(B0i+bb00,ep)
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enddo
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enddo
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enddo
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do ep=-2,0
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do n1=1,4
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do n2=n1,4
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do n3=n2,4
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FB3(y3(n1,n2,n3),ep)=q1(n1)*q1(n2)*q1(n3)*Bv(B0i+bb111,ep)
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. +pvSDDP(n1,n2,n3,q1)*Bv(B0i+bb001,ep)
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enddo
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enddo
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enddo
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enddo
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do ep=-2,0
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do n1=1,4
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do n2=n1,4
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do n3=n2,4
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do n4=n3,4
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FB4(y4(n1,n2,n3,n4),ep)=
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. +q1(n1)*q1(n2)*q1(n3)*q1(n4)*Bv(B0i+bb1111,ep)
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. +pvSDDPP(n1,n2,n3,n4,q1)*Bv(B0i+bb0011,ep)
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. +pvSDDDD(n1,n2,n3,n4)*Bv(B0i+bb0000,ep)
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enddo
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enddo
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enddo
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enddo
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enddo
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do ep=-2,0
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do n1=1,4
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do n2=n1,4
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do n3=n2,4
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do n4=n3,4
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do n5=n4,4
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FB5(y5(n1,n2,n3,n4,n5),ep)=
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. +Bv(B0i+bb00001,ep)*pvSDDDDP(n1,n2,n3,n4,n5,q1)
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. +Bv(B0i+bb00111,ep)*pvSDDPPP(n1,n2,n3,n4,n5,q1)
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. +Bv(B0i+bb11111,ep)*q1(n1)*q1(n2)*q1(n3)*q1(n4)*q1(n5)
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enddo
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enddo
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enddo
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enddo
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enddo
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enddo
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do ep=-2,0
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do n1=1,4
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do n2=n1,4
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do n3=n2,4
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do n4=n3,4
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do n5=n4,4
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do n6=n5,4
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FB6(y6(n1,n2,n3,n4,n5,n6),ep)=
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. +Bv(B0i+bb000000,ep)*pvSDDDDDD(n1,n2,n3,n4,n5,n6)
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. +Bv(B0i+bb000011,ep)*pvSDDDDPP(n1,n2,n3,n4,n5,n6,q1)
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. +Bv(B0i+bb001111,ep)*pvSDDPPPP(n1,n2,n3,n4,n5,n6,q1)
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. +Bv(B0i+bb111111,ep)*q1(n1)*q1(n2)*q1(n3)*q1(n4)*q1(n5)*q1(n6)
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enddo
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enddo
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enddo
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enddo
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enddo
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enddo
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enddo
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return
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end
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