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Title: What measurements of neutrino neutral current events can reveal

Abstract

Here, we show that neutral current (NC) measurements at neutrino detectors can play a valuable role in the search for new physics. Such measurements have certain intrinsic features and advantages that can fruitfully be combined with the usual well-studied charged lepton detection channels in order to probe the presence of new interactions or new light states. In addition to the fact that NC events are immune to uncertainties in standard model neutrino mixing and mass parameters, they can have small matter effects and superior rates since all three flavours participate. We also show, as a general feature, that NC measurements provide access to different combinations of CP phases and mixing parameters compared to CC measurements at both long and short baseline experiments. Using the Deep Underground Neutrino Experiment (DUNE) as an illustrative setting, we demonstrate the capability of NC measurements to break degeneracies arising in CC measurements, allowing us, in principle, to distinguish between new physics that violates three flavour unitarity and that which does not. Finally, we show that NC measurements can enable us to restrict new physics parameters that are not easily constrained by CC measurements.

Authors:
 [1];  [2];  [3];  [1]
  1. Harish-Chandra Research Inst. (HBNI), Allahabad (India)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States). Theoretical Physics Dept.
  3. Univ. of Campinas (UNICAMP), Campinas (Brazil). Instituto de Fisica Gleb Wataghin
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1410793
Report Number(s):
arXiv:1708.01816; FERMILAB-PUB-17-276-T
Journal ID: ISSN 1029-8479; 1614646; TRN: US1800146
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; 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; Beyond Standard Model; CP violation; Neutrino Physics

Citation Formats

Gandhi, Raj, Kayser, Boris, Prakash, Suprabh, and Roy, Samiran. What measurements of neutrino neutral current events can reveal. United States: N. p., 2017. Web. doi:10.1007/JHEP11(2017)202.
Gandhi, Raj, Kayser, Boris, Prakash, Suprabh, & Roy, Samiran. What measurements of neutrino neutral current events can reveal. United States. doi:10.1007/JHEP11(2017)202.
Gandhi, Raj, Kayser, Boris, Prakash, Suprabh, and Roy, Samiran. Wed . "What measurements of neutrino neutral current events can reveal". United States. doi:10.1007/JHEP11(2017)202. https://www.osti.gov/servlets/purl/1410793.
@article{osti_1410793,
title = {What measurements of neutrino neutral current events can reveal},
author = {Gandhi, Raj and Kayser, Boris and Prakash, Suprabh and Roy, Samiran},
abstractNote = {Here, we show that neutral current (NC) measurements at neutrino detectors can play a valuable role in the search for new physics. Such measurements have certain intrinsic features and advantages that can fruitfully be combined with the usual well-studied charged lepton detection channels in order to probe the presence of new interactions or new light states. In addition to the fact that NC events are immune to uncertainties in standard model neutrino mixing and mass parameters, they can have small matter effects and superior rates since all three flavours participate. We also show, as a general feature, that NC measurements provide access to different combinations of CP phases and mixing parameters compared to CC measurements at both long and short baseline experiments. Using the Deep Underground Neutrino Experiment (DUNE) as an illustrative setting, we demonstrate the capability of NC measurements to break degeneracies arising in CC measurements, allowing us, in principle, to distinguish between new physics that violates three flavour unitarity and that which does not. Finally, we show that NC measurements can enable us to restrict new physics parameters that are not easily constrained by CC measurements.},
doi = {10.1007/JHEP11(2017)202},
journal = {Journal of High Energy Physics (Online)},
number = 11,
volume = 2017,
place = {United States},
year = {Wed Nov 29 00:00:00 EST 2017},
month = {Wed Nov 29 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
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