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//==============================================================================
// Constants.h
//
// Copyright (C) 2010-2019 Tobias Toll and Thomas Ullrich
//
// This file is part of Sartre.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation.
// This program is distributed in the hope that it will be useful,
// but without any warranty; without even the implied warranty of
// merchantability or fitness for a particular purpose. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// Author: Thomas Ullrich
// Last update:
// $Date: 2019-11-23 22:21:53 +0000 (Sat, 23 Nov 2019) $
// $Author: ullrich $
//==============================================================================
#ifndef Constants_h
#define Constants_h
//
// General constants
//
const double electronMass = 0.510998902E-3; // GeV
const double electronMass2 = electronMass*electronMass; // GeV^2
const double protonMass = 0.9382700; // GeV
const double protonMass2 = protonMass*protonMass; // GeV^2
const double alpha_em = 1/137.036;
const double hbarc = 0.197327; // GeV*fm
const double hbarc2 = hbarc*hbarc; // GeV^2*fm^2
//
// Constants used in dipole model
//
const double Nc = 3.;
const double quarkCharge[6] = {2./3., -1./3., -1./3., 2./3., -1./3., 2./3.}; // u, d, s, c, b, t
//
// Constants used in integartion and other numerical operations
//
const double upperIntegrationLimit = 2.5; // factor: nuclear radius -> integration limits (b, r)
#endif

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