Observables / $Z^0$ decays / Flavour conserving decays

The tables below have been generated automatically from the observables currently implemented in flavio. The first column is the string name that must be used when calling functions such as flavio.sm_prediction. The last column lists the arguments the observable depends on (which can also be empty in case of a scalar observable).

$Z^0\to e^+ e^-$

Name Symbol Description Arguments
A(Z->ee) $A_ e$ Asymmetry parameter in $Z^0\to e^+ e^-$  
AFB(Z->ee) $A_\text{FB}^{0, e}$ Forward-backward asymmetry in $Z^0\to e^+ e^-$  
Gamma(Z->ee) $\Gamma(Z^0\to e^+ e^-)$ Partial width of $Z^0\to e^+ e^-$  
GammaZ $\Gamma_Z$ Total width of the $Z^0$ boson  
R_e $R_ e^0$ Ratio of $Z^0$ partial widths to hadrons vs. $ e$ pairs  
R_l $R_l^0$ Ratio of $Z^0$ partial widths to hadrons vs. leptons, averaged over lepton flavours  

$Z^0\to \mu^+\mu^-$

Name Symbol Description Arguments
A(Z->mumu) $A_\mu$ Asymmetry parameter in $Z^0\to \mu^+\mu^-$  
AFB(Z->mumu) $A_\text{FB}^{0,\mu}$ Forward-backward asymmetry in $Z^0\to \mu^+\mu^-$  
Gamma(Z->mumu) $\Gamma(Z^0\to \mu^+\mu^-)$ Partial width of $Z^0\to \mu^+\mu^-$  
GammaZ $\Gamma_Z$ Total width of the $Z^0$ boson  
R_l $R_l^0$ Ratio of $Z^0$ partial widths to hadrons vs. leptons, averaged over lepton flavours  
R_mu $R_\mu^0$ Ratio of $Z^0$ partial widths to hadrons vs. $\mu$ pairs  

$Z^0\to \tau^+\tau^-$

Name Symbol Description Arguments
A(Z->tautau) $A_\tau$ Asymmetry parameter in $Z^0\to \tau^+\tau^-$  
AFB(Z->tautau) $A_\text{FB}^{0,\tau}$ Forward-backward asymmetry in $Z^0\to \tau^+\tau^-$  
Gamma(Z->tautau) $\Gamma(Z^0\to \tau^+\tau^-)$ Partial width of $Z^0\to \tau^+\tau^-$  
GammaZ $\Gamma_Z$ Total width of the $Z^0$ boson  
R_l $R_l^0$ Ratio of $Z^0$ partial widths to hadrons vs. leptons, averaged over lepton flavours  
R_tau $R_\tau^0$ Ratio of $Z^0$ partial widths to hadrons vs. $\tau$ pairs  

$Z^0\to b\bar b$

Name Symbol Description Arguments
A(Z->bb) $A_ b$ Asymmetry parameter in $Z^0\to b\bar b$  
AFB(Z->bb) $A_\text{FB}^{0, b}$ Forward-backward asymmetry in $Z^0\to b\bar b$  
Gamma(Z->bb) $\Gamma(Z^0\to b\bar b)$ Partial width of $Z^0\to b\bar b$  
GammaZ $\Gamma_Z$ Total width of the $Z^0$ boson  
R_b $R_ b^0$ Ratio of $Z^0$ partial widths to $ b$ pairs vs. all hadrons  
sigma_had $\sigma_\text{had}^0$ $e^+e^-\to Z^0$ hadronic pole cross-section  

$Z^0\to c\bar c$

Name Symbol Description Arguments
A(Z->cc) $A_ c$ Asymmetry parameter in $Z^0\to c\bar c$  
AFB(Z->cc) $A_\text{FB}^{0, c}$ Forward-backward asymmetry in $Z^0\to c\bar c$  
Gamma(Z->cc) $\Gamma(Z^0\to c\bar c)$ Partial width of $Z^0\to c\bar c$  
GammaZ $\Gamma_Z$ Total width of the $Z^0$ boson  
R_c $R_ c^0$ Ratio of $Z^0$ partial widths to $ c$ pairs vs. all hadrons  
R_uc $R_{uc}^0$ Average ratio of $Z^0$ partial widths to $u$ or $c$ pairs vs. all hadrons  
sigma_had $\sigma_\text{had}^0$ $e^+e^-\to Z^0$ hadronic pole cross-section  

$Z^0\to d\bar d$

Name Symbol Description Arguments
A(Z->dd) $A_ d$ Asymmetry parameter in $Z^0\to d\bar d$  
AFB(Z->dd) $A_\text{FB}^{0, d}$ Forward-backward asymmetry in $Z^0\to d\bar d$  
Gamma(Z->dd) $\Gamma(Z^0\to d\bar d)$ Partial width of $Z^0\to d\bar d$  
GammaZ $\Gamma_Z$ Total width of the $Z^0$ boson  
R_d $R_ d^0$ Ratio of $Z^0$ partial widths to $ d$ pairs vs. all hadrons  
sigma_had $\sigma_\text{had}^0$ $e^+e^-\to Z^0$ hadronic pole cross-section  

$Z^0\to s\bar s$

Name Symbol Description Arguments
A(Z->ss) $A_ s$ Asymmetry parameter in $Z^0\to s\bar s$  
AFB(Z->ss) $A_\text{FB}^{0, s}$ Forward-backward asymmetry in $Z^0\to s\bar s$  
Gamma(Z->ss) $\Gamma(Z^0\to s\bar s)$ Partial width of $Z^0\to s\bar s$  
GammaZ $\Gamma_Z$ Total width of the $Z^0$ boson  
R_s $R_ s^0$ Ratio of $Z^0$ partial widths to $ s$ pairs vs. all hadrons  
sigma_had $\sigma_\text{had}^0$ $e^+e^-\to Z^0$ hadronic pole cross-section  

$Z^0\to u\bar u$

Name Symbol Description Arguments
A(Z->uu) $A_ u$ Asymmetry parameter in $Z^0\to u\bar u$  
AFB(Z->uu) $A_\text{FB}^{0, u}$ Forward-backward asymmetry in $Z^0\to u\bar u$  
Gamma(Z->uu) $\Gamma(Z^0\to u\bar u)$ Partial width of $Z^0\to u\bar u$  
GammaZ $\Gamma_Z$ Total width of the $Z^0$ boson  
R_u $R_ u^0$ Ratio of $Z^0$ partial widths to $ u$ pairs vs. all hadrons  
R_uc $R_{uc}^0$ Average ratio of $Z^0$ partial widths to $u$ or $c$ pairs vs. all hadrons  
sigma_had $\sigma_\text{had}^0$ $e^+e^-\to Z^0$ hadronic pole cross-section  

$Z^0\to\nu\bar\nu$

Name Symbol Description Arguments
Gamma(Z->nunu) $\Gamma(Z^0\to\nu\bar\nu)$ Partial width of $Z^0\to\nu\bar\nu$, averaged over neutrino flavours