Symbol |
Symbol("s") |
a real variable s. |
Index |
Index("mu",Type::VD) |
a Lorentz index mu with dimension d. |
|
Index("mu",Type::CA) |
a color index a with dimension NA. |
|
Index("mu",Type::CF) |
a color index i with dimension NF. |
Vector |
Vector("p") |
a vector/momentum p. |
Pair |
Pair(mu,nu) |
a Kronecker delta $$\delta_{\mu\nu}$$ with Index mu and nu. |
|
Pair(p,mu) |
a Vector p with Lorentz Index mu, $$p^\mu$$, p.mu. |
|
Pair(p,q) |
a scalar product $$p\cdot q$$ between Vector p and q. |
SUNT |
SUNT(a,i,j) |
a T-matrix element $$T^a_{ij}$$ for SU(N) group. |
|
SUNT(lst{a,b,c},i,j) |
a matrix element of a product of T, $$(T^aT^bT^c)_{ij}$$. |
SUNF |
SUNF(a,b,c) |
a structure constant $$f^{abc}$$ of SU(N) group. |
SUNF4 |
SUNF4(a,b,c,d) |
a contract of two SUNF, $$f^{abe} f^{ecd}$$. |
Eps |
Eps(mu1,mu2,mu3,mu4) |
a Levi-Civita tensor $$\varepsilon_{\mu_1\mu_2\mu_3\mu_4}$$. |
|
Eps(p1,p2,mu1,mu2) |
a partially contracted Levi-Civita tensor $$\varepsilon_{p_1p_2\mu_1\mu_2}$$. |
|
Eps(p1,p2,p3,p4) |
a fully contracted Levi-Civita tensor $$\varepsilon_{p_1p_2p_3p_4}$$. |
DGamma |
DGamma(mu,l) |
a Dirac-$$\gamma$$ matrix $$\gamma_\mu$$ for a fermion line l. |
|
DGamma(p,l) |
a Dirac slash $$p!!!/=p^\mu\gamma_\nu$$ for a fermion line l. |
|
DGamma(1/5/6/7,l) |
a unit matrix, $$\gamma_5$$, $$\gamma_6$$, $$\gamma_7$$ for a fermion line l. |
SP |
SP(mu,nu) |
evaluated to $$\delta_{\mu\nu}$$. |
|
SP(p+s*q,mu) |
evaluated to $$p^\mu+sq^\mu$$. |
|
SP(2*p+q,p+s*q) |
evaluated to $$2p^2+(2s+1)p\cdot q+sq^2$$. |
GAS |
GAS(mu) |
evaluated to $$\gamma_\mu$$. |
|
GAS(3*p+s*q) |
evaluated to $$3p!!!/+sq!!!/$$. |
|
GAS(1/5/6/7) |
evaluated to a unit matrix, $$\gamma_5$$, $$\gamma_6$$, $$\gamma_7$$, respectively. |
LC |
LC(p,mu,p+s*q,k) |
evaluated to $$s\varepsilon_{kph\mu}$$. |
TR |
TR(expr) |
a wrapper for the Dirac trace of expression expr. |
TTR |
TTR(lst{a,b,c,d}) |
a wraaper for the SU(N) trace of $$T^aT^bT^cT^d$$. |
form |
form(expr) |
evaluate the expression expr using FORM program. |