High-level manager for observable evaluation. More...

#include <memory>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <optional>
#include <any>
#include "ParamID.h"
#include "Observable.h"
#include "Decays.h"
#include "IObsParameterProxy.h"
#include "ObsPortsConfig.h"

Include dependency graph for ObsManager.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
struct	ObservableSelectionSnapshot

class	ObsManager

Typedefs
using	DecayThreadSnapshot = std::unordered_map< DecayId, size_t >

using	DecayConfigSnapshot = std::unordered_map< DecayId, std::any >

Detailed Description

High-level manager for observable evaluation.

ObsManager is the main entry point on the observable side: it owns a registry of:

available decay engines (DecayParent instances),
selected observables (Observable instances) bound to those decays.

It provides convenient methods to:

add/remove observables to be evaluated,
evaluate one observable or all registered ones,
manage observable dependencies (parameter lists),
configure decays and reload cached parameters,
register custom decays.

Design notes

Each observable is backed by a decay. Dynamic ObservableId values are routed through DecayMapper::get_decay_id, so builtin observables and custom observable ids registered in the mapper layer follow the same path.
When evaluating a specific observable, ObsManager selects the associated decay: it enables the needed one and disables the others (see select_decay).
Decays lazily build Wilson groups when enabled (through DecayParent::enable), using the observable ports (Wilson builder, parameter proxies, freezer, etc.).

Scales defaulting

In the default constructor path (when init_default_decays is true), matching and hadronic scales are inferred from SM inputs:

mu_W = 2 * m_W
mu_b = m_b(pole) / 2

Typical usage

ObservablePortsConfig ports{ ... };
ObsManager mgr(ports);
 
// Add one observable with a chosen QCD order
mgr.add_obs(Observables::BR_B_to_Xs_gamma, QCDOrder::NLO, add_deps=true);
 
// Evaluate it (returns possibly binned results)
auto values = mgr.evaluate(Observables::BR_B_to_Xs_gamma);
for (auto& v : values) {
    std::cout << v.id.str() << " = " << v.value << "\n";
}
 
// Evaluate all registered observables
auto all = mgr.evaluate_all();

See also: Observable; DecayParent; ObservablePortsConfig; DependenciesHelper

Definition in file ObsManager.h.

Typedef Documentation

◆ DecayConfigSnapshot

using DecayConfigSnapshot = std::unordered_map<DecayId, std::any>

Definition at line 80 of file ObsManager.h.

◆ DecayThreadSnapshot

using DecayThreadSnapshot = std::unordered_map<DecayId, size_t>

Definition at line 79 of file ObsManager.h.

Classes