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RooSpHarmonic.h
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1 /*****************************************************************************
2  * Project: RooFit *
3  * Package: RooFitModels *
4  * File: $Id$
5  * Authors: *
6  * GR, Gerhard Raven, Nikhef & VU, Gerhard.Raven@nikhef.nl
7  * *
8  * Copyright (c) 2010, Nikhef & VU. All rights reserved.
9  * *
10  * Redistribution and use in source and binary forms, *
11  * with or without modification, are permitted according to the terms *
12  * listed in LICENSE (http://roofit.sourceforge.net/license.txt) *
13  *****************************************************************************/
14 #ifndef ROO_SPHARMONIC
15 #define ROO_SPHARMONIC
16 
17 #include "RooLegendre.h"
18 #include "RooRealProxy.h"
19 
20 class RooSpHarmonic : public RooLegendre {
21 public:
22  RooSpHarmonic() ;
23  RooSpHarmonic(const char *name, const char *title, RooAbsReal& ctheta, RooAbsReal& phi, int l, int m);
24  RooSpHarmonic(const char *name, const char *title, RooAbsReal& ctheta, RooAbsReal& phi, int l1, int m1, int l2, int m2);
25 
26  RooSpHarmonic(const RooSpHarmonic& other, const char* name = 0);
27  virtual TObject* clone(const char* newname) const { return new RooSpHarmonic(*this, newname); }
28  inline virtual ~RooSpHarmonic() { }
29 
30  virtual Int_t getAnalyticalIntegral(RooArgSet& allVars, RooArgSet& analVars, const char* rangeName=0) const ;
31  virtual Double_t analyticalIntegral(Int_t code, const char* rangeName=0) const ;
32 
33  virtual Int_t getMaxVal( const RooArgSet& vars) const;
34  virtual Double_t maxVal( Int_t code) const;
35 
36 private:
38  double _n;
39  int _sgn1,_sgn2;
40 
41  Double_t evaluate() const;
42 
43  ClassDef(RooSpHarmonic,1) // SpHarmonic polynomial
44 };
45 
46 #endif
auto * m
Definition: textangle.C:8
virtual ~RooSpHarmonic()
Definition: RooSpHarmonic.h:28
virtual Int_t getMaxVal(const RooArgSet &vars) const
Advertise capability to determine maximum value of function for given set of observables.
virtual Double_t analyticalIntegral(Int_t code, const char *rangeName=0) const
this was verified to match mathematica for l1 in [0,2], m1 in [0,l1], l2 in [l1,4], m2 in [0,l2]
int Int_t
Definition: RtypesCore.h:41
Double_t evaluate() const
TODO: check that 0<=m_i<=l_i; on the other hand, assoc_legendre already does that ;-) Note: P_0^0 = 1...
#define ClassDef(name, id)
Definition: Rtypes.h:320
RooRealProxy _phi
Definition: RooSpHarmonic.h:37
Implementation of the so-called real spherical harmonics, using the orthonormal normalization, which are related to spherical harmonics as: .
Definition: RooSpHarmonic.h:20
static constexpr double m2
double Double_t
Definition: RtypesCore.h:55
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
Definition: RooAbsReal.h:53
Mother of all ROOT objects.
Definition: TObject.h:37
auto * l
Definition: textangle.C:4
virtual TObject * clone(const char *newname) const
Definition: RooSpHarmonic.h:27
virtual Double_t maxVal(Int_t code) const
Return maximum value for set of observables identified by code assigned in getMaxVal.
RooRealProxy is the concrete proxy for RooAbsReal objects A RooRealProxy is the general mechanism to ...
Definition: RooRealProxy.h:23
char name[80]
Definition: TGX11.cxx:109
virtual Int_t getAnalyticalIntegral(RooArgSet &allVars, RooArgSet &analVars, const char *rangeName=0) const
TODO: check that phi.max - phi.min = 2 pi...