cov_ten_ir

FL(s1, s2, s3, S, L)

FS(s1, s2, s3, S)

F_Sigma(s1, s2, s3, S, L)

MassiveTransAngle(p1, p2)

MasslessTransAngle(p1, p2)

NumSL(*args, **kwargs)

NumSL0(s1, s2, s3)

NumSL1(s1, s2, s3)

NumSL2(s1, s2, s3)

NumSL3(s1, s2, s3)

PWFA(p1, m1_zero, s1, p2, m2_zero, s2, s, S, L)

SCombLS(s1, s2, s3, i)

给出一组线性独立且完备的LS组合: i=0 代表三个粒子均有质量的情况; i=1 代表粒子2无质量的情况; i=2 代表粒子2和3均无质量的情况; i=3 代表初末态三粒子均无质量的情况。输出结果是一个集合,其元素为二元数组 {S,L}

WFunc1(s1, s2, s3, S, L)

WFunc2(s1, s2, s3, S, L)

amp0ls(s1, lens1, s2, lens2, s, lens, theta, phi, S, L)

cg_in_amp0ls(s1, lens1, s2, lens2, s, lens, S, L)

covariant_hel_term(j, spins, gamma)

Eq.52 in PhysRevD.57.431.

\[f_{m}^{s}(\gamma) = a^J(\lambda)\sum_{m0} b^{J} (m, m0) (2\gamma)^{m_0}\]

covariant_hel_term_a(j, m)

Eq.34 in PhysRevD.57.431.

\[a^J(m) = \frac{(J+m)!(J-m)!}{(2J)!}\]

covariant_hel_term_b(j, m, m0)

Eq.37 in PhysRevD.57.431.

\[2 m_{\pm} = J \pm m - m_0\]

\[b^J(m, m_0) = \frac{J!}{m_{+}! m_0! m_{-}!}\]

covariant_hel_term_build_coeffs(j, spins)

coefficients of Eq.52 in PhysRevD.57.431.

\[f_{m,m0}^{s} = a^J(\lambda) b^{J} (m, m0) (2)^{m_0}\]

>>> coeffs = covariant_hel_term_build_coeffs(2, (0,))[0]
>>> abs(coeffs[0][1] - 2/3) < 1e-6 and abs(coeffs[1][1] - 1/3) < 1e-6
...
True

>>> coeffs = covariant_hel_term_build_coeffs(4, (-1,1))[0]
>>> abs(coeffs[0][1] - 4/7) < 1e-6 and abs(coeffs[1][1] - 3/7) < 1e-6
...
True

delta_idx_in_amp0ls(s1, lens1, s2, lens2, s, lens, l)

force_int(f)

ls_selector_weight(decay, all_ls)

normal_factor(L)

sphericalHarmonic(l, theta, phi)

wigerDx(j, alpha, beta, gamma)

xyzToangle(pxyz)