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Sartre started originally as an ep only generator based on the bSat model described in [1]. The parameters, wave function, and parameterization for ep are essentially still the same. Sartre also still allows the use of the bCGC model described in the same publication but improved in [2]. The parameters for the bNonSat model used in Sartre were obtained through fits from a linearized dipole model described in [3]. The eA part was developed by the authors of Sartre and is described in ref. [4] where also some details of Sartre are described. We used ideas on how to implement the skewedness and real amplitude corrections from [5].
[1] Exclusive diffractive processes at HERA within the dipole picture;
H. Kowalski, L. Motyka, G. Watt; Phys. Rev. D74, 074016, arXiv:hep-ph/0606272v2
[2] Impact parameter dependent colour
glass condensate dipole model;
G. Watt , H. Kowalski; Phys. Rev. D78 (2008), 014016,
arXiv:0712.2670 [hep-ph]
[3] An Impact parameter dipole saturation model;
H. Kowalski, D. Teaney; Phys. Rev. D68 (2003), arXiv:hep-ph/0304189
[4] Exclusive diffractive processes
in electron-ion collisions;
Tobias Toll, Thomas Ullrich, Phys. Rev. C87, 02491 (2013), arXiv:1211.3048
[hep-ph]
[5] Incoherent diffractive J/Psi-production in high energy nuclear DIS; T. Lappi and H. Mantysaari; Phys. Rev. C 83, 065202 (2011),
arXiv:1011.1988
[hep-ph].
Many people helped and advised us in developing Sartre. We are grateful to Henri Kowalski for his help with the dipole model and the advise he provided on the optimal choice of variables. Lots of thanks also to Hannes Jung without whom the final state generator would not have happened. Francois Gelis provided us with his DGLAP code (including derivatives) and Werner Vogelsang with the αs code. Lots of thanks to Raju Venugopalan and Tuomas Lappi who always had an open ear whenever we got stuck and patiently answered even the most stupid questions.
Tobias wants to thank the developer of the Cuba package that answered patiently all questions concerning our multidimensional integration problems. Thomas wants to express his deep gratitude to R. J. Charity from WUSTL, the author of Gemini++. Without Bob and his helpful advise we would have not been able to include Gemini to handle the nuclear breakup for incoherent diffractive events and make it work so flawlessly.
Last but not least we want to thank Gabriele Garzoglio and especially Marko Slyz and Alexandr Zaytsev. Without their help we would have not been able to generate the massive CPU-intensive calculations of the amplitude tables one the Open Science Grid.
This work was supported by the U.S. Department of Energy under Grant No. DEAC02-98CH10886.
Last Update: February 27, 2013 |