The popular GENIE Generator product is used by nearly all accelerator neutrino experiments and it plays a key role in the exploitation of neutrino data. The Generator implements a modern software framework and it includes state-of-the-art physics modules. It captures the latest results of the GENIE global analysis of neutrino scattering data and includes several tunes that were produced using the proprietary Comparisons and Tuning products. The GENIE physics model is universal and comprehensive: It handles all neutrinos and targets, and all processes relevant from MeV to PeV energy scales. The Generator includes several tools (flux drivers, detector geometry navigators, specialized event generation apps, event reweighting engines) to simulate complex experimental setups in full detail and to support generator-related analysis tasks.
We have observed final-state nucleons (neutrons and protons) with zero momentum. As an example, we have identified a NC event with zero momentum nucleon production, as shown in the attached image.
These zero momentum nucleons have been detected in Genie v3.0.6, v3.2.0, and v3.4.0. Through testing, we have determined that these nucleons only appear in NCQE events and are strongly correlated with FSI processes. Furthermore, in events featuring these nucleons, energy conservation is not maintained.
The presence of these nucleons has an impact on nucleon multiplicity, which in turn affects the final results of NC background in rare event research, such as diffuse supernova neutrino background (DSNB), dark matter, and nucleon decay.
For more detailed information on this issue, please refer to the attached file.
JUNO_ganymede_20231121.pdf
Best regards,
Jie Cheng
Dear all,
We have observed final-state nucleons (neutrons and protons) with zero momentum. As an example, we have identified a NC event with zero momentum nucleon production, as shown in the attached image.
These zero momentum nucleons have been detected in Genie v3.0.6, v3.2.0, and v3.4.0. Through testing, we have determined that these nucleons only appear in NCQE events and are strongly correlated with FSI processes. Furthermore, in events featuring these nucleons, energy conservation is not maintained.
The presence of these nucleons has an impact on nucleon multiplicity, which in turn affects the final results of NC background in rare event research, such as diffuse supernova neutrino background (DSNB), dark matter, and nucleon decay.
For more detailed information on this issue, please refer to the attached file. JUNO_ganymede_20231121.pdf Best regards, Jie Cheng