This directory contains the source code and executable program for a new version of a Single-Arm Monte Carlo (SAMC) that is written fully in C++ (with the exception of some functions that are written in fortran) and uses an object-oriented approach.

Some functions are written in fortran and may be found in the ./src/*.f files. These functions are called from C++ classes where appropriate. See the LeRoseOptics and CrossSection classes for more details.

Below is a brief description of all the classes used. More details may be found in the *.h files and their corresponding *.C files (in the ./include and ./src directories, respectively).

Material Stores the characteristsics of materials in the electron path [Z, A, thickness (cm, g/cm^2, #X0), radiation length, density].

Kinematics Calculates various kinematical quantities.

Physics Calculates energy loss and multiple-scattering processes.

SAMCEvent Stores the kinematics (Es, Ep, nu, Q2, W and x_bj) and coordinates (target and focal plane) for a given event.

CrossSection Calculates a Born or radiated cross section using the F1F209 model by P. Bosted. The user must set Z and A of the target and pass Es, Ep (GeV) and th (deg) to obtain a cross section.

MatrixElement A matrix element for use with the AnalyzerOptics class.

AnalyzerOptics Utilizes the Hall A Analyzer's optics matrix to transport electrons from the focal plane to the target (for reconstructed variables)

LeRoseOptics Utilizes J. LeRose transport matrices to transport the scattered electron from the target to the focal plane (and vice-versa).

AnalysisManager Handles writing of data to the ROOTfile.

FileManager Handles all input and output from and to data files.
In particular, reads in important parameters of the HRS and initial kinematics and coordinates (full-width distributions) of the event.