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Keeping it Simple: Simplified Frameworks for Long-Lived Particles at Neutrino Facilities
Modern-day accelerator neutrino facilities are excellent venues for searches for new-physics particles. Many distinct new-physics models predict overlapping signatures and phenomenology in these experiments. In this work, we advocate for the adoption of simplified frameworks when studying these type...
Autores principales: | , , |
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Lenguaje: | eng |
Publicado: |
2023
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Acceso en línea: | https://dx.doi.org/10.1007/JHEP08(2023)092 http://cds.cern.ch/record/2866736 |
_version_ | 1780978115975053312 |
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author | Batell, Brian Huang, Wenjie Kelly, Kevin J. |
author_facet | Batell, Brian Huang, Wenjie Kelly, Kevin J. |
author_sort | Batell, Brian |
collection | CERN |
description | Modern-day accelerator neutrino facilities are excellent venues for searches for new-physics particles. Many distinct new-physics models predict overlapping signatures and phenomenology in these experiments. In this work, we advocate for the adoption of simplified frameworks when studying these types of new-physics signatures, which are characterized by a small number of primary variables, including particle masses, lifetimes, and production and decay modes/rates that most directly control signal event rates and kinematics. In particular, taking the example of long-lived particles that decay inside a neutrino detector as a test case, we study formulate and study simplified frameworks in the context of light scalars/fermions produced in kaon decays which then decay into final states containing an electron-positron pair. We show that using these simplified frameworks can allow for individual experimental analyses to be applicable to a wide variety of specific model scenarios. As a side benefit, we demonstrate that using this approach can allow for the T2K collaboration, by reinterpreting its search for Heavy Neutral Leptons, to be capable of setting world-leading limits on the Higgs-Portal Scalar model. Furthermore, we argue the simplified framework interpretation can serve as a bridge to model identification in the hopeful detection of a new-physics signal. As an illustration, we perform a first determination of the likelihood that, in the presence of a new-physics signal in a detector like the DUNE ND-GAr, multiple different new-physics hypotheses (such as the Higgs-Portal Scalar and Heavy Neutral Lepton ones) can be disentangled. We demonstrate that this model discrimination is favorable for some portions of detectable new-physics parameter space but for others, it is more challenging. |
id | cern-2866736 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2023 |
record_format | invenio |
spelling | cern-28667362023-09-12T03:12:32Zdoi:10.1007/JHEP08(2023)092http://cds.cern.ch/record/2866736engBatell, BrianHuang, WenjieKelly, Kevin J.Keeping it Simple: Simplified Frameworks for Long-Lived Particles at Neutrino Facilitieshep-exParticle Physics - Experimenthep-phParticle Physics - PhenomenologyModern-day accelerator neutrino facilities are excellent venues for searches for new-physics particles. Many distinct new-physics models predict overlapping signatures and phenomenology in these experiments. In this work, we advocate for the adoption of simplified frameworks when studying these types of new-physics signatures, which are characterized by a small number of primary variables, including particle masses, lifetimes, and production and decay modes/rates that most directly control signal event rates and kinematics. In particular, taking the example of long-lived particles that decay inside a neutrino detector as a test case, we study formulate and study simplified frameworks in the context of light scalars/fermions produced in kaon decays which then decay into final states containing an electron-positron pair. We show that using these simplified frameworks can allow for individual experimental analyses to be applicable to a wide variety of specific model scenarios. As a side benefit, we demonstrate that using this approach can allow for the T2K collaboration, by reinterpreting its search for Heavy Neutral Leptons, to be capable of setting world-leading limits on the Higgs-Portal Scalar model. Furthermore, we argue the simplified framework interpretation can serve as a bridge to model identification in the hopeful detection of a new-physics signal. As an illustration, we perform a first determination of the likelihood that, in the presence of a new-physics signal in a detector like the DUNE ND-GAr, multiple different new-physics hypotheses (such as the Higgs-Portal Scalar and Heavy Neutral Lepton ones) can be disentangled. We demonstrate that this model discrimination is favorable for some portions of detectable new-physics parameter space but for others, it is more challenging.Modern-day accelerator neutrino facilities are excellent venues for searches for new-physics particles. Many distinct new-physics models predict overlapping signatures and phenomenology in these experiments. In this work, we advocate for the adoption of simplified frameworks when studying these types of new-physics signatures, which are characterized by a small number of primary variables, including particle masses, lifetimes, and production and decay modes/rates that most directly control signal event rates and kinematics. In particular, taking the example of long-lived particles that decay inside a neutrino detector as a test case, we study formulate and study simplified frameworks in the context of light scalars/fermions produced in kaon decays which then decay into final states containing an electron-positron pair. We show that using these simplified frameworks can allow for individual experimental analyses to be applicable to a wide variety of specific model scenarios. As a side benefit, we demonstrate that using this approach can allow for the T2K collaboration, by reinterpreting its search for Heavy Neutral Leptons, to be capable of setting world-leading limits on the Higgs-Portal Scalar model. Furthermore, we argue the simplified framework interpretation can serve as a bridge to model identification in the hopeful detection of a new-physics signal. As an illustration, we perform a first determination of the likelihood that, in the presence of a new-physics signal in a detector like the DUNE ND-GAr, multiple different new-physics hypotheses (such as the Higgs-Portal Scalar and Heavy Neutral Lepton ones) can be disentangled. We demonstrate that this model discrimination is favorable for some portions of detectable new-physics parameter space but for others, it is more challenging.arXiv:2304.11189oai:cds.cern.ch:28667362023-04-21 |
spellingShingle | hep-ex Particle Physics - Experiment hep-ph Particle Physics - Phenomenology Batell, Brian Huang, Wenjie Kelly, Kevin J. Keeping it Simple: Simplified Frameworks for Long-Lived Particles at Neutrino Facilities |
title | Keeping it Simple: Simplified Frameworks for Long-Lived Particles at Neutrino Facilities |
title_full | Keeping it Simple: Simplified Frameworks for Long-Lived Particles at Neutrino Facilities |
title_fullStr | Keeping it Simple: Simplified Frameworks for Long-Lived Particles at Neutrino Facilities |
title_full_unstemmed | Keeping it Simple: Simplified Frameworks for Long-Lived Particles at Neutrino Facilities |
title_short | Keeping it Simple: Simplified Frameworks for Long-Lived Particles at Neutrino Facilities |
title_sort | keeping it simple: simplified frameworks for long-lived particles at neutrino facilities |
topic | hep-ex Particle Physics - Experiment hep-ph Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1007/JHEP08(2023)092 http://cds.cern.ch/record/2866736 |
work_keys_str_mv | AT batellbrian keepingitsimplesimplifiedframeworksforlonglivedparticlesatneutrinofacilities AT huangwenjie keepingitsimplesimplifiedframeworksforlonglivedparticlesatneutrinofacilities AT kellykevinj keepingitsimplesimplifiedframeworksforlonglivedparticlesatneutrinofacilities |