Ahmed, Z., Evans, R.S., Goel, I. et al. (5 more authors) (2025) DEMPgen:Physics event generator for deep exclusive meson production at Jefferson lab and the EIC. Computer Physics Communications. 109444. ISSN 0010-4655
Abstract
There is increasing interest in deep exclusive meson production (DEMP) reactions, as they provide access to Generalized Parton Distributions over a broad kinematic range, and are the only means of measuring pion and kaon charged electric form factors at high Q2. Such investigations are a particularly useful tool in the study of hadronic structure in QCD's transition regime from long-distance interactions described in terms of meson-nucleon degrees of freedom, to short-distance interactions governed by hard quark-gluon degrees of freedom. To assist the planning of future experimental investigations of DEMP reactions in this transition regime, such as at Jefferson Lab and the Electron-Ion Collider (EIC), we have written a special purpose event generator, DEMPgen. Currently, DEMPgen can generate the following reactions: t-channel p(e,e′π+)n, p(e,e′K+)Λ[Σ0], and n→(e,e′π−)p from a polarized 3He target. DEMPgen is modular in form, so that additional reactions can be added over time. The generator produces kinematically-complete reaction events which are absolutely-normalized, so that projected event rates can be predicted, and detector resolution requirements studied. The event normalization is based on parameterizations of theoretical models, appropriate to the kinematic regime under study. Both fixed target modes and collider beam modes are supported. This paper presents the structure of the generator, the model parameterizations used for absolute event weighting, the kinematic distributions of the generated particles, some initial results using the generator, and instructions for its use.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Author(s) |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 27 Nov 2024 10:40 |
Last Modified: | 19 Mar 2025 00:12 |
Published Version: | https://doi.org/10.1016/j.cpc.2024.109444 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.cpc.2024.109444 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:220161 |
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Description: DEMPgen: Physics event generator for Deep Exclusive Meson Production at Jefferson Lab and the EIC
Licence: CC-BY-NC-ND 2.5