Using krypton-83m to determine the neutrino-mass bias caused by a non-constant electric potential of the KATRIN source
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866911007685738496 |
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| author | Machatschek, Moritz |
| author_facet | Machatschek, Moritz |
| contents | Precision spectroscopy of the electron spectrum of the tritium $β$ decay near the kinematic endpoint is a direct method to determine the effective electron antineutrino mass. The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to determine this quantity with a sensitivity of better than $0.3\,\mathrm{eV}$ ($90\,\%$~C.L.). An inhomogeneous electric potential in the tritium source of KATRIN leads to a distortion of the $β$ spectrum, which directly impacts the neutrino-mass observable. This effect can be quantified through precision spectroscopy of the conversion electrons of co-circulated metastable $^{83\mathrm{m}}Kr$. This work perturbatively describes the effect of the source potential on the recorded spectra, and thus establishes the leading-order observables of this effect. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_13829 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Using krypton-83m to determine the neutrino-mass bias caused by a non-constant electric potential of the KATRIN source Machatschek, Moritz Instrumentation and Detectors Nuclear Experiment Data Analysis, Statistics and Probability Precision spectroscopy of the electron spectrum of the tritium $β$ decay near the kinematic endpoint is a direct method to determine the effective electron antineutrino mass. The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to determine this quantity with a sensitivity of better than $0.3\,\mathrm{eV}$ ($90\,\%$~C.L.). An inhomogeneous electric potential in the tritium source of KATRIN leads to a distortion of the $β$ spectrum, which directly impacts the neutrino-mass observable. This effect can be quantified through precision spectroscopy of the conversion electrons of co-circulated metastable $^{83\mathrm{m}}Kr$. This work perturbatively describes the effect of the source potential on the recorded spectra, and thus establishes the leading-order observables of this effect. |
| title | Using krypton-83m to determine the neutrino-mass bias caused by a non-constant electric potential of the KATRIN source |
| topic | Instrumentation and Detectors Nuclear Experiment Data Analysis, Statistics and Probability |
| url | https://arxiv.org/abs/2506.13829 |