/usr/include/ThePEG/PDF/PDFCuts.h is in libthepeg-dev 1.8.0-1.1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | // -*- C++ -*-
//
// PDFCuts.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2011 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef ThePEG_PDFCuts_H
#define ThePEG_PDFCuts_H
// This is the declaration of the PDFCuts class.
#include "ThePEG/Config/ThePEG.h"
#include "ThePEG/Utilities/Interval.h"
#include "ThePEG/Cuts/Cuts.fh"
namespace ThePEG {
/**
* The PDFCuts class is used to specify cuts on scale and momentum
* fractions for which a PDFBase object is expected to give parton
* densities. It is used to estimate upper limits on the parton
* densities to be generated by a PDFBase object.
*
* @see PDFBase
*/
class PDFCuts {
public:
/** @name Standard constructors, assignment and destructors. */
//@{
/**
* Default constructor.
*/
PDFCuts() : theSMax() {}
/**
* Construction from members.
*/
PDFCuts(const Interval<double> & newL,
const SInterval & newScale, const Energy2 & newSMax)
: theL(newL), theScale(newScale), theSMax(newSMax) {}
/**
* Construction from a Cuts object, using the values for
* the first incoming parton (or not).
*/
PDFCuts(const Cuts &, bool first, const SInterval & S,
const SInterval & sHat);
/**
* Construction from a Cuts object, using the values for
* the first incoming parton (or not).
*/
PDFCuts(const Cuts &, bool first, Energy maxEnergy);
//@}
public:
/** @name Access the individual limits. */
//@{
/**
* The minimum value of \f$\log(1/x)\f$.
*/
double lMin() const { return theL.lower(); }
/**
* The maximum value of \f$\log(1/x)\f$.
*/
double lMax() const { return theL.upper(); }
/**
* The minimum value of x.
*/
double xMin() const { return exp(-lMax()); }
/**
* The maximum value of x.
*/
double xMax() const { return exp(-lMin()); }
/**
* The lower limit on the scale to be used.
*/
Energy2 scaleMin() const { return theScale.lower(); }
/**
* The upper limit on the scale to be used.
*/
Energy2 scaleMax() const { return theScale.upper(); }
/**
* The maximum scale for a given momentum fraction.
*/
Energy2 scaleMax(double x) const { return min(scaleMax(), sMax()*x); }
/**
* The maximum scale for a given logarithmic momentum fraction.
*/
Energy2 scaleMaxL(double l) const { return scaleMax(exp(-l)); }
/**
* The maximum invariant mass squared of the colliding particles.
*/
Energy2 sMax() const { return theSMax; }
//@}
private:
/**
* The minimum and maximum values of \f$\log(1/x)\f$.
*/
Interval<double> theL;
/**
* The limits on the scale to be used.
*/
SInterval theScale;
/**
* The maximum invariant mass squared of the colliding particles.
*/
Energy2 theSMax;
};
}
#endif /* ThePEG_PDFCuts_H */
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