IHEP Diffractive Group - Generator ExDiff

Monte-Carlo Event Generator ExDiff

ExDiff processes (to be included to the generator)

Fig. 1 Amplitudes for exclusive diffractive processes: a) elastic scattering with T_el; b) general process of Central Exclusive Diffractive Production (CEDP) with central production born amplitude C and absorptive corrections V_in=V(s,b) and V_out=V(s',b). Versions of the CEDP Born amplitudes are: c) low mass resonance production; d) di-hadron production; e) high mass resonance production; f) high mass di-hadron production; g) di-jet production; h) nonperturbative photon-pomeron low mass resonance production; i) perturbative photon-pomeron high mass resonance production and j) high mass di-jet production. Possible additional corrections due to unitarization procedure are depicted as dotted ovals. In d) and f) it is possible to produce also di-bosons like gamma gamma, Z Z or W⁺ W^- instead of di-hadrons h h.

$Excluaive Diffractive PROcesses$

ExDiff is a Monte Carlo event generator for simulation of Exclusive Diffractive processes in proton-proton collisions. The present version ExDiff v2.0 includes reactions:

elastic scattering p + p → p + p at 7, 8, 13, 14 TeV;
Central Exclusive Diffractive Production (CEDP) of low mass resonances, p + p → p + R + p,
R = f₀(1500), f₀(1710), f₂(1950) at 8 and 13 TeV, f₂(1270) at 8 TeV, f₂(2220) at 13 TeV.
Also some test files of Born distributions for CEDP of two pions, p + p → p + π⁺ π^- + p, are added.

In the future versions many other processes of CEDP will be added.

The present version 2.0 is linked to Pythia 8.2 (to make resonance decays and hadronization) and also to ROOT and HEPMC output via Pythia 8.2 interface.

Other information on the investigations can be found on the web-page of the IHEP Diffractive Group

Generator

Source files for the latest version ExDiff v2.0. Since tables for models are rather big, you can also download the generator without them .

Manual

At this moment you can use documents

R.A. Ryutin (Protvino, IHEP), ExDiff2.0 Physics and Manual arXiv:1805.08591
R.A. Ryutin, A.A. Godizov, V.A. Petrov (Protvino, IHEP), ExDiff1.0 Physics and Manual , arXiv:1704.04387
R.A. Ryutin (Protvino, IHEP), ExDiff presentation (talk, CT-PPS meeting, 14.12.2016 )
R.A. Ryutin (Protvino, IHEP), ExDiff1.0 status (talk, CT-PPS meeting, 10.03.2017 )

You can download also more old version of the generator. Processes implemented into ExDiff v1.0.2 : elastic p p scattering at 7, 8, 13, 14 TeV and CEDP of f₂(1950) at 13 TeV, f₀(1710) and f₀(1500) at 13 TeV and 8 TeV.

Last updated on 15.05.2018. Send your comments and suggestions on this page to Roman Ryutin