The impact of sterile neutrinos on CP measurements at long baselines
Abstract
With the Deep Underground Neutrino Experiment (DUNE) as an example, we show that the presence of even one sterile neutrino of mass ~1 eV can significantly impact the measurements of CP violation in long baseline experiments. Using a probability level analysis and neutrino-antineutrino asymmetry calculations, we discuss the large magnitude of these effects, and show how they translate into significant event rate deviations at DUNE. These results demonstrate that measurements which, when interpreted in the context of the standard three family paradigm, indicate CP conservation at long baselines, may, in fact hide large CP violation if there is a sterile state. Similarly, any data indicating the violation of CP cannot be properly interpreted within the standard paradigm unless the presence of sterile states of mass O(1 eV) can be conclusively ruled out. Our work underscores the need for a parallel and linked short baseline oscillation program and a highly capable near detector for DUNE, but in order that its highly anticipated results on CP violation in the lepton sector may be correctly interpreted.
- Authors:
-
- Harish-Chandra Research Inst., Allahabad (India); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Harish-Chandra Research Inst., Allahabad (India)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1223243
- Report Number(s):
- FERMILAB-PUB-15-323-T
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1508.06275
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 11; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; neutrino physics; CP violation
Citation Formats
Gandhi, Raj, Kayser, Boris, Masud, Mehedi, and Prakash, Suprabh. The impact of sterile neutrinos on CP measurements at long baselines. United States: N. p., 2015.
Web. doi:10.1007/JHEP11(2015)039.
Gandhi, Raj, Kayser, Boris, Masud, Mehedi, & Prakash, Suprabh. The impact of sterile neutrinos on CP measurements at long baselines. United States. https://doi.org/10.1007/JHEP11(2015)039
Gandhi, Raj, Kayser, Boris, Masud, Mehedi, and Prakash, Suprabh. Tue .
"The impact of sterile neutrinos on CP measurements at long baselines". United States. https://doi.org/10.1007/JHEP11(2015)039. https://www.osti.gov/servlets/purl/1223243.
@article{osti_1223243,
title = {The impact of sterile neutrinos on CP measurements at long baselines},
author = {Gandhi, Raj and Kayser, Boris and Masud, Mehedi and Prakash, Suprabh},
abstractNote = {With the Deep Underground Neutrino Experiment (DUNE) as an example, we show that the presence of even one sterile neutrino of mass ~1 eV can significantly impact the measurements of CP violation in long baseline experiments. Using a probability level analysis and neutrino-antineutrino asymmetry calculations, we discuss the large magnitude of these effects, and show how they translate into significant event rate deviations at DUNE. These results demonstrate that measurements which, when interpreted in the context of the standard three family paradigm, indicate CP conservation at long baselines, may, in fact hide large CP violation if there is a sterile state. Similarly, any data indicating the violation of CP cannot be properly interpreted within the standard paradigm unless the presence of sterile states of mass O(1 eV) can be conclusively ruled out. Our work underscores the need for a parallel and linked short baseline oscillation program and a highly capable near detector for DUNE, but in order that its highly anticipated results on CP violation in the lepton sector may be correctly interpreted.},
doi = {10.1007/JHEP11(2015)039},
journal = {Journal of High Energy Physics (Online)},
number = 11,
volume = 2015,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 2015},
month = {Tue Sep 01 00:00:00 EDT 2015}
}
Web of Science
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