file src/DarkBit/src/DMEFT.cpp
[No description available] More…
Namespaces
| Name |
|---|
| Gambit TODO: see if we can use this one: |
| Gambit::DarkBit |
Classes
| Name | |
|---|---|
| class | Gambit::DarkBit::DMEFT |
Defines
| Name | |
|---|---|
| getSMmass(Name, spinX2) | |
| addParticle(Name, Mass, spinX2) |
Detailed Description
Author:
- The GAMBIT Collaboration
- Sanjay Bloor (sanjay.bloor12@imperial.ac.uk)
Date:
- 12:32PM on October 15, 2019
- Oct 2019
Implementation of DMEFT DarkBit routines.
Authors (add name and date if you modify):
*** Automatically created by GUM ***
Macros Documentation
define getSMmass
#define getSMmass(
Name,
spinX2
)
catalog.particleProperties.insert(std::pair<string, TH_ParticleProperty> (Name, TH_ParticleProperty(SM.get(Par::Pole_Mass,Name), spinX2)));
define addParticle
#define addParticle(
Name,
Mass,
spinX2
)
catalog.particleProperties.insert(std::pair<string, TH_ParticleProperty> (Name, TH_ParticleProperty(Mass, spinX2)));
Source code
// GAMBIT: Global and Modular BSM Inference Tool
// *********************************************
/// \file
///
/// Implementation of DMEFT
/// DarkBit routines.
///
/// Authors (add name and date if you modify):
/// *** Automatically created by GUM ***
///
/// \author The GAMBIT Collaboration
/// \date 12:32PM on October 15, 2019
///
/// \author Sanjay Bloor
/// (sanjay.bloor12@imperial.ac.uk)
/// \date Oct 2019
///
/// *********************************************
#include "boost/make_shared.hpp"
#include "gambit/Elements/gambit_module_headers.hpp"
#include "gambit/DarkBit/DarkBit_rollcall.hpp"
#include "gambit/Utils/ascii_table_reader.hpp"
#include "gambit/DarkBit/DarkBit_utils.hpp"
namespace Gambit
{
namespace DarkBit
{
class DMEFT
{
public:
/// Initialize DMEFT object (branching ratios etc)
DMEFT() {};
~DMEFT() {};
// Annihilation cross-section. sigmav is a pointer to a CalcHEP backend function.
double sv(str channel, DecayTable& tbl, double (*sigmav)(str&, std::vector<str>&, std::vector<str>&, double&, const DecayTable&), double v_rel)
{
/// Returns sigma*v for a given channel.
double GeV2tocm3s1 = gev2cm2*s2cm;
// CalcHEP args
str model = "DMEFT"; // CalcHEP model name
std::vector<str> in = {"chi", "chi~"}; // In states: DM+DMbar
std::vector<str> out; // Out states
if (channel == "dbar_1, d_1") out = {"d~", "d"};
if (channel == "ubar_1, u_1") out = {"u~", "u"};
if (channel == "dbar_2, d_2") out = {"s~", "s"};
if (channel == "ubar_2, u_2") out = {"c~", "c"};
if (channel == "dbar_3, d_3") out = {"b~", "b"};
if (channel == "ubar_3, u_3") out = {"t~", "t"};
if (channel == "g, g") out = {"g", "g"};
// Check the channel has been filled
if (out.size() > 1) return sigmav(model, in, out, v_rel, tbl)*GeV2tocm3s1;
else return 0;
}
};
void TH_ProcessCatalog_DMEFT(DarkBit::TH_ProcessCatalog &result)
{
using namespace Pipes::TH_ProcessCatalog_DMEFT;
using std::vector;
using std::string;
// WIMP and conjugate names
str chi = Dep::WIMP_properties->name;
str chib = Dep::WIMP_properties->conjugate;
// Initialize empty catalog, main annihilation process
TH_ProcessCatalog catalog;
TH_Process process_ann(chi, chib);
// Explicitly state that Dirac DM is not self-conjugate to add extra
// factors of 1/2 where necessary
process_ann.isSelfConj = Dep::WIMP_properties->sc;
// Import particle masses
// Convenience macros
#define getSMmass(Name, spinX2) catalog.particleProperties.insert(std::pair<string, TH_ParticleProperty> (Name, TH_ParticleProperty(SM.get(Par::Pole_Mass,Name), spinX2)));
#define addParticle(Name, Mass, spinX2) catalog.particleProperties.insert(std::pair<string, TH_ParticleProperty> (Name, TH_ParticleProperty(Mass, spinX2)));
// Import Spectrum objects
const Spectrum& spec = *Dep::DMEFT_spectrum;
const SubSpectrum& SM = spec.get_LE();
const SMInputs& SMI = spec.get_SMInputs();
// Get SM pole masses
getSMmass("e-_1", 1)
getSMmass("e+_1", 1)
getSMmass("e-_2", 1)
getSMmass("e+_2", 1)
getSMmass("e-_3", 1)
getSMmass("e+_3", 1)
getSMmass("Z0", 2)
getSMmass("W+", 2)
getSMmass("W-", 2)
getSMmass("g", 2)
getSMmass("gamma", 2)
getSMmass("u_3", 1)
getSMmass("ubar_3", 1)
getSMmass("d_3", 1)
getSMmass("dbar_3", 1)
// Pole masses not available for the light quarks.
addParticle("u_1" , SMI.mU, 1) // mu(2 GeV)^MS-bar
addParticle("ubar_1", SMI.mU, 1) // mu(2 GeV)^MS-bar
addParticle("d_1" , SMI.mD, 1) // md(2 GeV)^MS-bar
addParticle("dbar_1", SMI.mD, 1) // md(2 GeV)^MS-bar
addParticle("u_2" , SMI.mCmC,1) // mc(mc)^MS-bar
addParticle("ubar_2", SMI.mCmC,1) // mc(mc)^MS-bar
addParticle("d_2" , SMI.mS, 1) // ms(2 GeV)^MS-bar
addParticle("dbar_2", SMI.mS, 1) // ms(2 GeV)^MS-bar
// Masses for neutrino flavour eigenstates. Set to zero.
// (presently not required)
addParticle("nu_e", 0.0, 1)
addParticle("nubar_e", 0.0, 1)
addParticle("nu_mu", 0.0, 1)
addParticle("nubar_mu", 0.0, 1)
addParticle("nu_tau", 0.0, 1)
addParticle("nubar_tau",0.0, 1)
// Meson masses
addParticle("pi0", meson_masses.pi0, 0)
addParticle("pi+", meson_masses.pi_plus, 0)
addParticle("pi-", meson_masses.pi_minus, 0)
addParticle("eta", meson_masses.eta, 0)
addParticle("rho0", meson_masses.rho0, 1)
addParticle("rho+", meson_masses.rho_plus, 1)
addParticle("rho-", meson_masses.rho_minus, 1)
addParticle("omega", meson_masses.omega, 1)
// DMEFT-specific masses
double mchi = spec.get(Par::Pole_Mass, "chi");
addParticle(chi, mchi, 1);
addParticle(chib, mchi, 1);
addParticle("h0_1", spec.get(Par::Pole_Mass, "h0_1"), 0);
// Get rid of convenience macros
#undef getSMmass
#undef addParticle
// Import decay table from DecayBit
DecayTable tbl = *Dep::decay_rates;
// Set of imported decays
std::set<string> importedDecays;
// Minimum branching ratio to include
double minBranching = runOptions->getValueOrDef<double>(0.0, "ProcessCatalog_MinBranching");
// Import relevant decays
using DarkBit_utils::ImportDecays;
auto excludeDecays = daFunk::vec<std::string>("Z0", "W+", "W-", "u_3", "ubar_3", "e+_2", "e-_2", "e+_3", "e-_3");
ImportDecays("h0_1", catalog, importedDecays, &tbl, minBranching, excludeDecays);
// Instantiate new DMEFT object.
auto pc = boost::make_shared<DMEFT>();
// Populate annihilation channel list and add thresholds to threshold list.
process_ann.resonances_thresholds.threshold_energy.push_back(2*mchi);
auto channels =
daFunk::vec<string>("dbar_1, d_1", "ubar_1, u_1", "dbar_2, d_2", "ubar_2, u_2", "dbar_3, d_3", "ubar_3, u_3", "g, g");
auto p1 =
daFunk::vec<string>("dbar_1", "ubar_1", "dbar_2", "ubar_2", "dbar_3", "ubar_3", "g");
auto p2 =
daFunk::vec<string>("d_1", "u_1", "d_2", "u_2", "d_3", "u_3", "g");
for (unsigned int i = 0; i < channels.size(); ++i)
{
double mtot_final =
catalog.getParticleProperty(p1[i]).mass +
catalog.getParticleProperty(p2[i]).mass;
if (mchi*2 > mtot_final*0.5)
{
daFunk::Funk kinematicFunction = daFunk::funcM(pc, &DMEFT::sv, channels[i], tbl,
BEreq::CH_Sigma_V.pointer(), daFunk::var("v"));
TH_Channel new_channel(daFunk::vec<string>(p1[i], p2[i]), kinematicFunction);
process_ann.channelList.push_back(new_channel);
}
if (mchi*2 > mtot_final)
{
process_ann.resonances_thresholds.threshold_energy.push_back(mtot_final);
}
}
catalog.processList.push_back(process_ann);
// Validate
catalog.validate();
result = catalog;
} // function TH_ProcessCatalog
void DarkMatter_ID_DMEFT(std::string& result){ result = "chi"; }
void DarkMatterConj_ID_DMEFT(std::string& result){ result = "chi~"; }
/// Relativistic Wilson Coefficients for direct detection
/// DMEFT basis is the same as that used in DirectDM
void DD_rel_WCs_flavscheme_DMEFT(map_str_dbl& result)
{
using namespace Pipes::DD_rel_WCs_flavscheme_DMEFT;
const Spectrum& spec = *Dep::DMEFT_spectrum;
const SMInputs& sminputs = *Dep::SMINPUTS;
// In our model the Wilson coefficients are dimensionless
double Lambda = spec.get(Par::mass1, "Lambda");
double C51 = spec.get(Par::dimensionless, "C51");
double C52 = spec.get(Par::dimensionless, "C52");
double C61 = spec.get(Par::dimensionless, "C61");
double C62 = spec.get(Par::dimensionless, "C62");
double C63 = spec.get(Par::dimensionless, "C63");
double C64 = spec.get(Par::dimensionless, "C64");
double C71 = spec.get(Par::dimensionless, "C71");
double C72 = spec.get(Par::dimensionless, "C72");
double C73 = spec.get(Par::dimensionless, "C73");
double C74 = spec.get(Par::dimensionless, "C74");
double C75 = spec.get(Par::dimensionless, "C75");
double C76 = spec.get(Par::dimensionless, "C76");
double C77 = spec.get(Par::dimensionless, "C77");
double C78 = spec.get(Par::dimensionless, "C78");
double C79 = spec.get(Par::dimensionless, "C79");
double C710 = spec.get(Par::dimensionless, "C710");
// So we need to rescale them by the appropriate scale
result["C51"] = C51/Lambda;
result["C52"] = C52/Lambda;
// Gluon operators -- universal, do not depend on
// quark flavour.
result["C71"] = C71/pow(Lambda, 3.);
result["C72"] = C72/pow(Lambda, 3.);
result["C73"] = C73/pow(Lambda, 3.);
result["C74"] = C74/pow(Lambda, 3.);
// The following terms have a fermion bilinear so, in theory, can have a
// different WC for each. We take these to be universal i.e.
// C_{dim}{tag}(f) == C_{dim}{tag}
// Also only considering interactions with *quarks and gluons* --
// not leptons, so C_{7}{tag}(tau, mu, e) = 0
result["C61d"] = C61/pow(Lambda, 2.);
result["C61u"] = C61/pow(Lambda, 2.);
result["C61s"] = C61/pow(Lambda, 2.);
result["C61c"] = C61/pow(Lambda, 2.);
result["C61b"] = C61/pow(Lambda, 2.);
result["C62d"] = C62/pow(Lambda, 2.);
result["C62u"] = C62/pow(Lambda, 2.);
result["C62s"] = C62/pow(Lambda, 2.);
result["C62c"] = C62/pow(Lambda, 2.);
result["C62b"] = C62/pow(Lambda, 2.);
result["C63d"] = C63/pow(Lambda, 2.);
result["C63u"] = C63/pow(Lambda, 2.);
result["C63s"] = C63/pow(Lambda, 2.);
result["C63c"] = C63/pow(Lambda, 2.);
result["C63b"] = C63/pow(Lambda, 2.);
result["C64d"] = C64/pow(Lambda, 2.);
result["C64u"] = C64/pow(Lambda, 2.);
result["C64s"] = C64/pow(Lambda, 2.);
result["C64c"] = C64/pow(Lambda, 2.);
result["C64b"] = C64/pow(Lambda, 2.);
result["C75d"] = C75/pow(Lambda, 3.);
result["C75u"] = C75/pow(Lambda, 3.);
result["C75s"] = C75/pow(Lambda, 3.);
result["C75c"] = C75/pow(Lambda, 3.);
result["C75b"] = C75/pow(Lambda, 3.);
result["C76d"] = C76/pow(Lambda, 3.);
result["C76u"] = C76/pow(Lambda, 3.);
result["C76s"] = C76/pow(Lambda, 3.);
result["C76c"] = C76/pow(Lambda, 3.);
result["C76b"] = C76/pow(Lambda, 3.);
result["C77d"] = C77/pow(Lambda, 3.);
result["C77u"] = C77/pow(Lambda, 3.);
result["C77s"] = C77/pow(Lambda, 3.);
result["C77c"] = C77/pow(Lambda, 3.);
result["C77b"] = C77/pow(Lambda, 3.);
result["C78d"] = C78/pow(Lambda, 3.);
result["C78u"] = C78/pow(Lambda, 3.);
result["C78s"] = C78/pow(Lambda, 3.);
result["C78c"] = C78/pow(Lambda, 3.);
result["C78b"] = C78/pow(Lambda, 3.);
result["C79d"] = C79/pow(Lambda, 3.);
result["C79u"] = C79/pow(Lambda, 3.);
result["C79s"] = C79/pow(Lambda, 3.);
result["C79c"] = C79/pow(Lambda, 3.);
result["C79b"] = C79/pow(Lambda, 3.);
result["C710d"] = C710/pow(Lambda, 3.);
result["C710u"] = C710/pow(Lambda, 3.);
result["C710s"] = C710/pow(Lambda, 3.);
result["C710c"] = C710/pow(Lambda, 3.);
result["C710b"] = C710/pow(Lambda, 3.);
// use the running top mass at Q=mt, which is an input
double mtatmt = spec.get(Par::mass1,"mtrun");
// If Lambda > m_t(m_t) then we include corrections
if(Lambda > mtatmt)
{
// 1. Loop induced coupling to dim-5
// operators to dim-7, see:
// https://arxiv.org/pdf/1302.4454.pdf
double lamovermt2 = pow(Lambda, 2.)/pow(mtatmt, 2.);
double prefactor = -4/lamovermt2*log(lamovermt2);
result["C51"] += prefactor*C79/Lambda;
result["C52"] += prefactor*C710/Lambda;
// 2. Threshold effects from
// integrating out the top quark
result["C71"] -= C75/pow(Lambda, 3.);
result["C72"] -= C76/pow(Lambda, 3.);
result["C73"] += C77/pow(Lambda, 3.);
result["C74"] += C78/pow(Lambda, 3.);
// 3. Mixing of O_3^6 into O_1^6, see:
// https://arxiv.org/pdf/1402.1173.pdf
// Use tree level relations for sw2 and vev
double sw2 = 1 - pow(sminputs.mW,2) / pow(sminputs.mZ,2);
double vev = 1.0 / sqrt(sqrt(2)*sminputs.GF);
double prefactoru = (8.*sw2-3.)/2. * pow(mtatmt/(2.*vev*pi), 2.) * log(1/lamovermt2);
double prefactord = (3.-4.*sw2)/2. * pow(mtatmt/(2.*vev*pi), 2.) * log(1/lamovermt2);
double C61u = C61/pow(Lambda, 2.) + prefactoru * C63/pow(Lambda, 2.);
double C61d = C61/pow(Lambda, 2.) + prefactord * C63/pow(Lambda, 2.);
// The following bit is intended to make it easier for the scanner to find points for which direct detection constraints are satisfied
// by adding a flavour-independent term to C61u and C61d such that the resulting couplings are Xe-phobic (f_n / f_p = -0.7).
// This step should be commented out if C61 is not varied in the scans.
double IVratio = -1.125;
double C61uIV = IVratio/(IVratio-1.)*(C61u-C61d);
double C61dIV = 1./(IVratio-1.)*(C61u-C61d);
result["C61d"] = C61dIV;
result["C61u"] = C61uIV;
}
} // DD_rel_WCs_flavscheme_DMEFT
} //namespace DarkBit
} //namespace Gambit
Updated on 2024-07-18 at 13:53:34 +0000