namespace Gambit::DecayBit::MSSM_H #

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Functions #

Functions Documentation #

function lambda #

double lambda(
    double x,
    double y,
    double z
)

Phase-space function (similar to Kallen function)

[ \lambda(x, y; z) = (1 - x / z - y / z)^2 - 4 x y / z^2 ]

function gamma_h_chi_gL #

double gamma_h_chi_gL(
    std::array< double, 2 > m,
    double gL,
    double mh =125.,
    double mw =80.385,
    double GF =1.1663787e-5
)

Eq. 2.56 for charginos or neutralinos (\Gamma(h \to \chi_i \chi_j)) in GeV

mMasses of final state particles

gLCoupling (g_L) in Eq. 1.112

mhLightest Higgs mass, (m_h)

mwW-boson mass, (M_W)

GFFermi constant, (G_F)

function gamma_h_chi_0 #

double gamma_h_chi_0(
    int i,
    int j,
    std::array< double, 4 > m,
    std::array< std::array< double, 4 >, 4 > Z,
    double alpha,
    double mh =125.,
    double mw =80.385,
    double GF =1.1663787e-5,
    double sw2 =0.22
)

Lightest Higgs boson decay to neutralinos at tree-level in GeV

Arguments (i) and (j) are zero-based

Tree-level formula

(\Gamma(h \to \chi_i \chi_j)) in GeV

iNeutralino (\chi_i) in final state

jNeutralino (\chi_j) in final state

mNeutralino mases with phases

ZReal neutralino mixing matrix

alpha(\alpha), Higgs mixing angle

mhLightest Higgs mass, (m_h)

mwW-boson mass, (M_W)

GFFermi constant, (G_F)

sw2Weinberg angle, (\sin^2\theta_W)

function gamma_h_chi_pm #

double gamma_h_chi_pm(
    int i,
    int j,
    std::array< double, 2 > m,
    std::array< std::array< double, 2 >, 2 > U,
    std::array< std::array< double, 2 >, 2 > V,
    double alpha,
    double mh =125.,
    double mw =80.385,
    double GF =1.1663787e-5
)

Lightest Higgs boson decay to charginos at tree-level in GeV

Arguments (i) and (j) are zero-based

Tree-level formula

(\Gamma(h \to \chi^-_i \chi^+_j)) in GeV

iNegative chargino (\chi^-_i) in final state

jPositive chargino (\chi^+_j) in final state

mChargino masses

UReal chargino mixing matrix

VReal chargino mixing matrix

alpha(\alpha), Higgs mixing angle

mhLightest Higgs mass, (m_h)

mwW-boson mass, (M_W)

GFFermi constant, (G_F)

function gamma_h_chi #

double gamma_h_chi(
    std::array< double, 2 > m_pm,
    std::array< double, 4 > m_0,
    std::array< std::array< double, 2 >, 2 > U,
    std::array< std::array< double, 2 >, 2 > V,
    std::array< std::array< double, 4 >, 4 > Z,
    double alpha,
    double mh =125.,
    double mw =80.385,
    double GF =1.1663787e-5,
    double sw2 =0.22
)

Lightest Higgs boson decay to neutralinos and charginos at tree-level in GeV

Tree-level formula

(\Gamma(h \to \chi\chi)) in GeV

m_pmChargino masses

m_0Neutralino mases with phases

UReal chargino mixing matrix

VReal chargino mixing matrix

ZReal neutralino mixing matrix

alpha(\alpha), Higgs mixing angle

mhLightest Higgs mass, (m_h)

mwW-boson mass, (M_W)

GFFermi constant, (G_F)

sw2Weinberg angle, (\sin^2\theta_W)

Updated on 2023-06-26 at 21:36:52 +0000