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Title: Neutrino tridents at DUNE

Abstract

The DUNE near detector will collect an unprecedented large number of neutrino interactions, allowing the precise measurement of rare processes such as neutrino trident production, i.e. the generation of a lepton-antilepton pair through the scattering of a neutrino off a heavy nucleus. The event rate of this process is a powerful probe to a well-motivated parameter space of new physics beyond the Standard Model. In this paper, we perform a detailed sensitivity study of the DUNE near detector to neutrino tridents. We provide state-of-the-art predictions for the Standard Model cross sections and corresponding event rates at the near detector for the $$\nu_{\mu} \to \nu_{\mu} \mu^+ \mu^-, \nu_{\mu} \to \nu_{\mu} e^+ e^-$$ and $$\nu_{\mu} \to \nu_e e^+ \mu^-$$ trident interactions (and the corresponding anti-neutrino modes), discussing their uncertainties. We analyze all relevant backgrounds, utilize a Geant4-based simulation of the DUNE-near detector liquid argon TPC (the official DUNE simulation at the time of writing this paper), and identify a set of selection cuts that would allow the DUNE near detector to measure the $$\nu_{\mu} \to \nu_{\mu} \mu^+ \mu^-$$ cross section with a ~25% accuracy after running in neutrino and anti-neutrino modes for ~3 years each. This would lead to the most precise measurement of the trident process, surpassing the previous measurement by the CCFR collaboration. We show that this measurement would be highly sensitive to new physics, and, in particular, we find that the parameter space of models with gauged $$L_{\mu} - L_{\tau}$$ that can explain the (g-2)$$_{\mu}$$ anomaly could be covered almost entirely. As a byproduct, a new Monte Carlo tool to generate neutrino trident events is made publicly available.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [3]
  1. Univ. of California, Santa Cruz, CA (United States)
  2. Harvard Univ., Cambridge, MA (United States)
  3. Univ. of Cincinnati, Cincinnati, OH (United States)
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:
1579589
Alternate Identifier(s):
OSTI ID: 1576551
Report Number(s):
arXiv:1902.06765; FERMILAB-PUB-19-062-LBNF-ND
Journal ID: ISSN 2470-0010; PRVDAQ; oai:inspirehep.net:1720838
Grant/Contract Number:  
AC02-07CH11359; SC011784
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 100; Journal Issue: 11; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Altmannshofer, Wolfgang, Gori, Stefania, Martín-Albo, Justo, Sousa, Alexandre, and Wallbank, Michael. Neutrino tridents at DUNE. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.100.115029.
Altmannshofer, Wolfgang, Gori, Stefania, Martín-Albo, Justo, Sousa, Alexandre, & Wallbank, Michael. Neutrino tridents at DUNE. United States. doi:10.1103/PhysRevD.100.115029.
Altmannshofer, Wolfgang, Gori, Stefania, Martín-Albo, Justo, Sousa, Alexandre, and Wallbank, Michael. Tue . "Neutrino tridents at DUNE". United States. doi:10.1103/PhysRevD.100.115029.
@article{osti_1579589,
title = {Neutrino tridents at DUNE},
author = {Altmannshofer, Wolfgang and Gori, Stefania and Martín-Albo, Justo and Sousa, Alexandre and Wallbank, Michael},
abstractNote = {The DUNE near detector will collect an unprecedented large number of neutrino interactions, allowing the precise measurement of rare processes such as neutrino trident production, i.e. the generation of a lepton-antilepton pair through the scattering of a neutrino off a heavy nucleus. The event rate of this process is a powerful probe to a well-motivated parameter space of new physics beyond the Standard Model. In this paper, we perform a detailed sensitivity study of the DUNE near detector to neutrino tridents. We provide state-of-the-art predictions for the Standard Model cross sections and corresponding event rates at the near detector for the $\nu_{\mu} \to \nu_{\mu} \mu^+ \mu^-, \nu_{\mu} \to \nu_{\mu} e^+ e^-$ and $\nu_{\mu} \to \nu_e e^+ \mu^-$ trident interactions (and the corresponding anti-neutrino modes), discussing their uncertainties. We analyze all relevant backgrounds, utilize a Geant4-based simulation of the DUNE-near detector liquid argon TPC (the official DUNE simulation at the time of writing this paper), and identify a set of selection cuts that would allow the DUNE near detector to measure the $\nu_{\mu} \to \nu_{\mu} \mu^+ \mu^-$ cross section with a ~25% accuracy after running in neutrino and anti-neutrino modes for ~3 years each. This would lead to the most precise measurement of the trident process, surpassing the previous measurement by the CCFR collaboration. We show that this measurement would be highly sensitive to new physics, and, in particular, we find that the parameter space of models with gauged $L_{\mu} - L_{\tau}$ that can explain the (g-2)$_{\mu}$ anomaly could be covered almost entirely. As a byproduct, a new Monte Carlo tool to generate neutrino trident events is made publicly available.},
doi = {10.1103/PhysRevD.100.115029},
journal = {Physical Review D},
number = 11,
volume = 100,
place = {United States},
year = {2019},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.100.115029

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