Search for Neutrino-Produced Long-Lived Particles Using the SBND Cosmic Ray Tagger Beam Telescope
Abstract
The Short-Baseline Near Detector (SBND) is a liquid argon time projection chamber in Fermilab's Short-Baseline Neutrino Program, positioned 110 meters from the neutrino target along the Booster Neutrino Beam (BNB). In addition to its neutrino physics goals, SBND enables searches for new physics, including long-lived particles (LLPs) produced via neutrino-nucleus upscattering that decay into visible final states. Although neutrino data taking with the full SBND experiment began in December 2024, a subset of the Cosmic Ray Tagger (CRT) system operated from 2017--2018 as a standalone detector, referred to as the CRT Beam Telescope, collecting data corresponding to 2.95× 1020 protons on target from the BNB. Originally intended for commissioning and performance studies, the substantial dataset collected also enables searches for displaced LLP decays. This paper presents the first search for physics beyond the Standard Model using data from the SBND CRT Beam Telescope, targeting LLP decays into electron-positron pairs. We observe no significant excess above the expected background and set 90% confidence-level upper limits on an effective production cross section at the level of 10−38 cm2 for laboratory decay lengths of 0.3-100 m. These results complement existing searches by probing displaced decay signatures at meter-scale decay lengths.
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BibTeX
@misc{acciarri2026search,
title = {{Search for Neutrino-Produced Long-Lived Particles Using the SBND Cosmic Ray Tagger Beam Telescope}},
author = {R. Acciarri and L. Aliaga-Soplin and D. Andrade Aldana and C. Andreopoulos and A. Antonakis and S. Balasubramanian and A. Barnard and V. Basque and J. R. Bateman and A. Beever and B. Behera and M. Betancourt and A. Bhat and M. Bishai and A. Blake and B. Bogart and D. Brailsford and A. Brandt and S. Brickner and M. B. Brunetti and G. A. N. Buzzard and L. Camilleri and D. Caratelli and D. Carber and B. Carlson and M. F. Carneiro and R. Castillo Fernandez and F. Cavanna and A. Chappell and H. Chen and S. Chung and R. Coackley and J. I. Crespo-Anadón and C. Cuesta and Y. Dabburi and O. Dalager and M. Dall'Olio and S. K. Das and M. Del Tutto and Z. Djurcic and V. do Lago Pimentel and S. Dominguez-Vidales and M. Donnachie and M. Dubnowski and K. Duffy and S. Dytman and A. Ereditato and E. Espinoza and J. J. Evans and A. C. Ezeribe and C. Fan and A. Filkins and B. Fleming and W. Foreman and D. Franco and G. Fricano and I. Furic and A. P. Furmanski and S. Gao and D. Garcia-Gamez},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.37555},
eprint = {2610.37555},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.37555},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Search for Neutrino-Produced Long-Lived Particles Using the SBND Cosmic Ray Tagger Beam Telescope
AU - R. Acciarri
AU - L. Aliaga-Soplin
AU - D. Andrade Aldana
AU - C. Andreopoulos
AU - A. Antonakis
AU - S. Balasubramanian
AU - A. Barnard
AU - V. Basque
AU - J. R. Bateman
AU - A. Beever
AU - B. Behera
AU - M. Betancourt
AU - A. Bhat
AU - M. Bishai
AU - A. Blake
AU - B. Bogart
AU - D. Brailsford
AU - A. Brandt
AU - S. Brickner
AU - M. B. Brunetti
AU - G. A. N. Buzzard
AU - L. Camilleri
AU - D. Caratelli
AU - D. Carber
AU - B. Carlson
AU - M. F. Carneiro
AU - R. Castillo Fernandez
AU - F. Cavanna
AU - A. Chappell
AU - H. Chen
AU - S. Chung
AU - R. Coackley
AU - J. I. Crespo-Anadón
AU - C. Cuesta
AU - Y. Dabburi
AU - O. Dalager
AU - M. Dall'Olio
AU - S. K. Das
AU - M. Del Tutto
AU - Z. Djurcic
AU - V. do Lago Pimentel
AU - S. Dominguez-Vidales
AU - M. Donnachie
AU - M. Dubnowski
AU - K. Duffy
AU - S. Dytman
AU - A. Ereditato
AU - E. Espinoza
AU - J. J. Evans
AU - A. C. Ezeribe
AU - C. Fan
AU - A. Filkins
AU - B. Fleming
AU - W. Foreman
AU - D. Franco
AU - G. Fricano
AU - I. Furic
AU - A. P. Furmanski
AU - S. Gao
AU - D. Garcia-Gamez
PY - 2026
DA - 2026/10/27
PB - arXiv
DO - 10.48550/arxiv.2610.37555
UR - https://arxiv.org/abs/2610.37555
AB - The Short-Baseline Near Detector (SBND) is a liquid argon time projection chamber in Fermilab's Short-Baseline Neutrino Program, positioned 110 meters from the neutrino target along the Booster Neutrino Beam (BNB). In addition to its neutrino physics goals, SBND enables searches for new physics, including long-lived particles (LLPs) produced via neutrino-nucleus upscattering that decay into visible final states. Although neutrino data taking with the full SBND experiment began in December 2024, a subset of the Cosmic Ray Tagger (CRT) system operated from 2017--2018 as a standalone detector, referred to as the CRT Beam Telescope, collecting data corresponding to 2.95× 10^20 protons on target from the BNB. Originally intended for commissioning and performance studies, the substantial dataset collected also enables searches for displaced LLP decays. This paper presents the first search for physics beyond the Standard Model using data from the SBND CRT Beam Telescope, targeting LLP decays into electron-positron pairs. We observe no significant excess above the expected background and set 90% confidence-level upper limits on an effective production cross section at the level of 10^−38 cm^2 for laboratory decay lengths of 0.3-100 m. These results complement existing searches by probing displaced decay signatures at meter-scale decay lengths.
ER -