def _get_angularcoeff(q2, wc_obj, par, B, P, lep, nu):
ml = par['m_' + lep]
mB = par['m_' + B]
mP = par['m_' + P]
scale = config['renormalization scale']['bpll']
mb = running.get_mb(par, scale)
wc = get_wceff_fccc2(wc_obj,
par,
meson_quark[(B, P)],
lep,
nu,
mb,
scale,
nf=5)
N = prefactor(q2, par, B, P, lep)
ff = get_ff(q2, par, B, P)
qi_qj = meson_quark[(B, P)]
if qi_qj == 'bu':
mlight = 0. # neglecting the up quark mass
if qi_qj == 'bc':
mlight = running.get_mc(
par, scale) # this is needed for scalar contributions
h = angular.helicity_amps_p(q2, mB, mP, mb, mlight, ml, 0, ff, wc, N)
J = angular.angularcoeffs_general_p(h, q2, mB, mP, mb, mlight, ml, 0)
return J
def helicity_amps_ff(q2, wc_obj, par_dict, B, P, l1, l2, cp_conjugate):
par = par_dict.copy()
if cp_conjugate:
par = conjugate_par(par)
scale = config['renormalization scale']['bpll']
label = meson_quark[(B,P)] + l1 + l2 # e.g. bsmumu, bdtautau
if l1 == l2:
# include SM contributions for LF conserving decay
wc = wctot_dict(wc_obj, label, scale, par)
else:
wc = wc_obj.get_wc(label, scale, par)
if cp_conjugate:
wc = conjugate_wc(wc)
if l1 == l2:
wc_eff = get_wceff(q2, wc, par, B, P, l1, scale)
else:
wc_eff = get_wceff_lfv(q2, wc, par, B, P, l1, l2, scale)
ml1 = par['m_'+l1]
ml2 = par['m_'+l2]
mB = par['m_'+B]
mP = par['m_'+P]
mb = running.get_mb(par, scale)
N = prefactor(q2, par, B, P)
ff = get_ff(q2, par, B, P)
h = angular.helicity_amps_p(q2, mB, mP, mb, 0, ml1, ml2, ff, wc_eff, N)
return h
def helicity_amps_ff(q2, wc_obj, par_dict, B, P, l1, l2, cp_conjugate):
par = par_dict.copy()
if cp_conjugate:
par = conjugate_par(par)
scale = config['renormalization scale']['bpll']
label = meson_quark[(B,P)] + l1 + l2 # e.g. bsmumu, bdtautau
if l1 == l2:
# include SM contributions for LF conserving decay
wc = wctot_dict(wc_obj, label, scale, par)
else:
wc = wc_obj.get_wc(label, scale, par)
if cp_conjugate:
wc = conjugate_wc(wc)
if l1 == l2:
wc_eff = get_wceff(q2, wc, par, B, P, l1, scale)
else:
wc_eff = get_wceff_lfv(q2, wc, par, B, P, l1, l2, scale)
ml1 = par['m_'+l1]
ml2 = par['m_'+l2]
mB = par['m_'+B]
mP = par['m_'+P]
mb = running.get_mb(par, scale)
N = prefactor(q2, par, B, P)
ff = get_ff(q2, par, B, P)
h = angular.helicity_amps_p(q2, mB, mP, mb, 0, ml1, ml2, ff, wc_eff, N)
return h
def helicity_amps(q2, wc, par_dict, B, P, l1, l2):
par = par_dict.copy()
scale = config['renormalization scale']['bpll']
wc_eff = get_wceff_lfv(q2, wc, par, B, P, l1, l2, scale)
ml1 = par['m_'+l1]
ml2 = par['m_'+l2]
mB = par['m_'+B]
mP = par['m_'+P]
mb = running.get_mb(par, scale)
N = prefactor(q2, par, B, P)
ff = get_ff(q2, par, B, P)
h = angular.helicity_amps_p(q2, mB, mP, mb, 0, ml1, ml2, ff, wc_eff, N)
return h
def get_angularcoeff(q2, wc_obj, par, B, P, lep):
ml = par['m_'+lep]
mB = par['m_'+B]
mP = par['m_'+P]
scale = config['renormalization scale']['bpll']
mb = running.get_mb(par, scale)
wc = get_wceff_fccc(wc_obj, par, meson_quark[(B,P)], lep, mb, scale, nf=5)
N = prefactor(q2, par, B, P, lep)
ff = get_ff(q2, par, B, P)
qi_qj = meson_quark[(B, P)]
if qi_qj == 'bu':
mlight = 0. # neglecting the up quark mass
if qi_qj == 'bc':
mlight = running.get_mc(par, scale) # this is needed for scalar contributions
h = angular.helicity_amps_p(q2, mB, mP, mb, mlight, ml, 0, ff, wc, N)
J = angular.angularcoeffs_general_p(h, q2, mB, mP, mb, mlight, ml, 0)
return J
def helicity_amps_ff(q2, wc_obj, par_dict, B, P, lep, cp_conjugate):
par = par_dict.copy()
if cp_conjugate:
par = conjugate_par(par)
scale = config['renormalization scale']['bpll']
label = meson_quark[(B, P)] + lep + lep # e.g. bsmumu, bdtautau
wc = wctot_dict(wc_obj, label, scale, par)
if cp_conjugate:
wc = conjugate_wc(wc)
wc_eff = get_wceff(q2, wc, par, B, P, lep, scale)
ml = par['m_' + lep]
mB = par['m_' + B]
mP = par['m_' + P]
mb = running.get_mb(par, scale)
N = prefactor(q2, par, B, P)
ff = get_ff(q2, par, B, P)
h = angular.helicity_amps_p(q2, mB, mP, mb, 0, ml, ml, ff, wc_eff, N)
return h
def helicity_amps_ff(q2, wc_obj, par_dict, B, P, lep, cp_conjugate):
par = par_dict.copy()
if cp_conjugate:
par = conjugate_par(par)
scale = config['renormalization scale']['bpll']
label = meson_quark[(B,P)] + lep + lep # e.g. bsmumu, bdtautau
wc = wctot_dict(wc_obj, label, scale, par)
if cp_conjugate:
wc = conjugate_wc(wc)
wc_eff = get_wceff(q2, wc, par, B, P, lep, scale)
ml = par['m_'+lep]
mB = par['m_'+B]
mP = par['m_'+P]
mb = running.get_mb(par, scale)
N = prefactor(q2, par, B, P)
ff = get_ff(q2, par, B, P)
h = angular.helicity_amps_p(q2, mB, mP, mb, 0, ml, ml, ff, wc_eff, N)
return h
def _get_angularcoeff(q2, wc_obj, par, B, P, lep, nu):
scale = config['renormalization scale']['bpll']
mb = running.get_mb(par, scale)
wc = get_wceff_fccc(wc_obj, par, meson_quark[(B,P)], lep, nu, mb, scale, nf=5)
if lep != nu and all(C == 0 for C in wc.values()):
return {'a': 0, 'b': 0, 'c': 0} # if all WCs vanish, so does the AC!
ml = par['m_'+lep]
mB = par['m_'+B]
mP = par['m_'+P]
N = prefactor(q2, par, B, P, lep)
ff = get_ff(q2, par, B, P)
qi_qj = meson_quark[(B, P)]
if qi_qj == 'bu':
mlight = 0. # neglecting the up quark mass
if qi_qj == 'bc':
mlight = running.get_mc(par, scale) # this is needed for scalar contributions
h = angular.helicity_amps_p(q2, mB, mP, mb, mlight, ml, 0, ff, wc, N)
J = angular.angularcoeffs_general_p(h, q2, mB, mP, mb, mlight, ml, 0)
return J