The dipole model Monte Carlo generator Sartre 1

We present the Monte Carlo generator Sartre for simulating diffractive exclusive vector meson production and DVCS in electron-proton, electron-ion, and hadron-hadron collisions. Program summary Program title: Sartre 1.0 Catalogue identifier: AESP_v1_0 Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AESP_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: GNU General Public License, version 2 No. of lines in distributed program, including test data, etc.: 703313 No. of bytes in distributed program, including test data, etc.: 179406465 Distribution format: tar.gz Programming language: CIC++. Computer: Any with standard C/C++ compiler. Operating system: Tested on Linux and MacOS. Classification: 11.1, 11.2, 11.6. External routines: ROOT and GSL for numeric algorithms and other various tasks throughout the program. BOOST for multi-threaded integration (optional), GEMINI++ for nuclear break-up and CUBA for multi-dimensional numerical integration (the latter two supplied with the program package). Uses cmake for building and installing. Nature of the problem: Simulate diffractive exclusive vector meson and deeply virtual Compton scattering (DVCS) production in electron-nucleus scattering where the exchanged virtual photon interacts coherently with a large region of the nucleus. To calculate the cross section correctly it has to be averaged over all possible configurations of nucleon positions within the nucleus. Solution method: To make an arithmetic average of the quantum mechanical amplitude over nucleon configurations numerically and store the result in look-up tables. Implemented processes: The following processes can be simulated: e + p -> e' + V + p' e + A -> e' + V + A' p + p -> p' + V + p' p + A -> p' + V + A' A + A -> A' + V + A' where V is a J/Psi, phi, or rho vector meson, or a real photon (DVCS). All processes are mediated by a virtual photon and a pomeron. The present version is applicable for these processes at future electron hadron colliders, such as the EIC and the LHeC, as well as HERA, RHIC, and the LHC. Restrictions: The program is reliable for process at x(p) < 10(-2), and large, beta = x/x(p). Additional comments: The distribution file for this program is over 178 MB and therefore is not delivered directly when download or E-mail is requested. Instead an html file giving details of how the program can be obtained is sent. Running time: On a MacBook Pro with a 166 GHz Intel Core i7 processor, event generation takes similar to 0.1 ms/event without correction and nuclear breakup, similar to 0.2 ms/event with the recommended corrections switched on, and 6 ms/event when running with corrections and nuclear breakup. (C) 2014 Elsevier B.V. All rights reserved.