#ifndef PDG_H
#define PDG_H

#define SPEED_OF_LIGHT 29.9792458 /* cm/ns */
/* From http://pdg.lbl.gov/2017/AtomicNuclearProperties/HTML/water_liquid.html.
 *
 * Technically there is a different radiation length for D2O and H2O, and each
 * should be divided by the density of the water. However, the results for
 * water and heavy water are very close so instead of having to keep track of
 * which medium we are in we just use the radiation length in light water. */
#define RADIATION_LENGTH 36.08 /* g/cm^2 */
#define ELECTRON_MASS 0.5109989461 /* MeV */
#define MUON_MASS 105.6583745 /* MeV */
#define PROTON_MASS 938.272081 /* MeV */
#define FINE_STRUCTURE_CONSTANT 7.297352566417e-3

double get_scattering_rms(double x, double p, double beta, double z);

#endif