1 package org.lcsim.recon.tracking.trfeloss;
2
3 /**
4 * Abstract class for evaluating the energy loss.
5 *
6 *@author Norman A. Graf
7 *@version 1.0
8 *
9 */
10
11 public abstract class DeDx
12 {
13 /**
14 *Return energy loss (dE/dx) for a given energy.
15 *
16 * @param energy The energy of the particle.
17 * @return The average energy lost by a particle of this energy.
18 */
19 public abstract double dEdX(double energy);
20
21 /**
22 *Return the uncertainty in the energy lost sigma(E).
23 *
24 * @param energy The energy of the particle.
25 * @param x The amount of material.
26 * @return The uncertainty in the energy lost sigma(E).
27 */
28 public abstract double sigmaEnergy(double energy, double x);
29
30 /**
31 *Return new energy for a given path distance.
32 * Energy increases if x < 0.
33 *
34 * @param energy The energy of the particle.
35 * @param x The amount of material.
36 * @return New energy for a given path distance.
37 */
38 public abstract double loseEnergy(double energy, double x);
39
40 }