The MicroBooNE light collection system

Katori, T.

doi:10.1088/1748-0221/8/10/c10011

Cited by 8 publications

(10 citation statements)

References 11 publications

(10 reference statements)

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“…Such a nano-second resolution was achieved previously by the PMTs used in MiniBooNE [14], with potential for improvement in the next generation SBN detectors. MicroBooNE is omitted from considerations of timing as its achievable timing resolution is lower at around 10 ns [63].…”

Section: Role Of Event Timingmentioning

confidence: 99%

MeV-scale sterile neutrino decays at the Fermilab Short-Baseline Neutrino program

Ballett

Pascoli

Ross-Lonergan

2017

J. High Energ. Phys.

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Nearly-sterile neutrinos with masses in the MeV range and below would be produced in the beam of the Short-Baseline Neutrino (SBN) program at Fermilab. In this article, we study the potential for SBN to discover these particles through their subsequent decays in its detectors. We discuss the decays which will be visible at SBN in a minimal and non-minimal extension of the Standard Model, and perform simulations to compute the parameter space constraints which could be placed in the absence of a signal. We demonstrate that the SBN programme can extend existing bounds on well constrained channels such as N Ñ νl`l´and N Ñ l˘π¯while, thanks to the strong particle identification capabilities of liquid-Argon technology, also place bounds on often neglected channels such as N Ñ νγ and N Ñ νπ 0 . Furthermore, we consider the phenomenological impact of improved event timing information at the three detectors. As well as considering its role in background reduction, we note that if the light-detection systems in SBND and ICARUS can achieve nanosecond timing resolution, the effect of finite sterile neutrino mass could be directly observable, providing a smoking-gun signature for this class of models. We stress throughout that the search for heavy nearly-sterile neutrinos is a complementary new physics analysis to the search for eV-scale oscillations, and would extend the BSM programme of SBN while requiring no beam or detector modifications.

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Section: Role Of Event Timingmentioning

confidence: 99%

MeV-scale sterile neutrino decays at the Fermilab Short-Baseline Neutrino program

Ballett

Pascoli

Ross-Lonergan

2017

J. High Energ. Phys.

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“…1. Introduction 1,1,4,4-Tetraphenyl-1,3-Butadiene (TPB) is an organic compound commonly used as a wavelength shifter in a variety of particle experiments which employ noble liquids as the detector medium, including DEAP-3600 [1], MiniCLEAN [2], DarkSide [3], ArDM [4], WArP [5], nEDM at SNS [6], and MicroBooNE [7]. It converts the UV light emitted by the noble liquids to easier-to-detect visible light.…”

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confidence: 99%

Temperature dependence of alpha-induced scintillation in the 1,1,4,4-tetraphenyl-1,3-butadiene wavelength shifter

et al. 2016

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Liquid noble based particle detectors often use the organic wavelength shifter 1,1,4,4tetraphenyl-1,3-butadiene (TPB) which shifts UV scintillation light to the visible regime, facilitating its detection, but which also can scintillate on its own. Dark matter searches based on this type of detector commonly rely on pulse-shape discrimination (PSD) for background mitigation. Alphainduced scintillation therefore represents a possible background source in dark matter searches. The timing characteristics of this scintillation determine whether this background can be mitigated through PSD. We have therefore characterized the pulse shape and light yield of alpha induced TPB scintillation at temperatures ranging from 300 K down to 4 K, with special attention given to liquid noble gas temperatures. We find that the pulse shapes and light yield depend strongly on temperature. In addition, the significant contribution of long time constants above ∼50 K provides an avenue for discrimination between alpha decay events in TPB and nuclear-recoil events in noble liquid detectors.

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“…An array of 8-inch PMTs is equipped behind the wire planes [79]. The main purpose of this photon collection system is to reject out-of-time cosmic rays and to trigger on in-time signals, since the scintillation light from the interaction arrives in ∼ns whereas the time scale of ionization electron drift is of order ∼ms.…”

Section: Near-future Experiments Addressing the Miniboone Resultsmentioning

confidence: 99%

Beyond Standard Model Searches in the MiniBooNE Experiment

Katori

Conrad

2015

Advances in High Energy Physics

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The MiniBooNE Experiment has contributed substantially to beyond standard model searches in the neutrino sector. The experiment was originally designed to test the ∆m 2 ∼ 1 eV 2 region of the sterile neutrino hypothesis by observing ν e (ν e ) charged current quasi-elastic signals from a ν µ (ν µ ) beam. MiniBooNE observed excesses of ν e andν e -candidate events in neutrino and anti-neutrino mode, respectively. To date, these excesses have not been explained within the neutrino Standard Model (νSM), the Standard Model extended for three massive neutrinos. Confirmation is required by future experiments such as MicroBooNE. MiniBooNE also provided an opportunity for precision studies of Lorentz violation. The results set strict limits for the first time on several parameters of the Standard Model-Extension, the generic formalism for considering Lorentz violation. Most recently, an extension to MiniBooNE running, with a beam tuned in beam-dump mode, is being performed to search for dark sector particles. This review describes these studies, demonstrating that short baseline neutrino experiments are rich environments in new physics searches. 1 arXiv:1404.7759v1 [hep-ex] 30 Apr 2014Across the particle physics community, the mysterious periodic-table-like nature of the Standard Model (SM) is motivating searches for new particles, new forces and new properties of the particles that are known. The neutrino sector is proving a rich environment for these searches. Having already found one beyond-Standard-Model (BSM) effect-neutrino mass [1]-a series of experiments are pursuing other potential signals. Unlike the case of three-neutrino oscillation measurements within νSM, many of these searches are pursued over short baselines, from a few meters to approximately a kilometer. The Mini Booster Neutrino Experiment (MiniBooNE) at Fermi National Accelerator Laboratory (Fermilab) is an excellent example, having contributed substantially to BSM studies.This review describes the MiniBooNE BSM program. We begin by describing the experiment. This is followed by a discussion of the MiniBooNE cross section studies, which have been essential input to both the BSM searches within this experiment, and also to other experiments, including T2K most recently [2]. We then describe three searches: the sterile neutrino search which motivated the experiment, Lorentz violation searches which set the first limits on five neutrino sector parameters, and the search for dark sector particles which is now being pursued with a re-configured beam. MiniBooNE (running from 2002MiniBooNE (running from -2012 was originally designed to test the LSND signal [3]. In the LSND experiment, low energy (0 to 53 MeV) muon anti-neutrinos were produced by pion decayat-rest (DAR), and were detected by the liquid-scintillator-based LSND detector at 31 m from the target. The observed 3.8σ excess ofν e candidate events could be interpreted as oscillations in the ∆m 2 ∼ 1 eV 2 region within a simple two massive neutrino oscillation hypothesis, where the oscillation proba...

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The MicroBooNE light collection system

Cited by 8 publications

References 11 publications

MeV-scale sterile neutrino decays at the Fermilab Short-Baseline Neutrino program

MeV-scale sterile neutrino decays at the Fermilab Short-Baseline Neutrino program

Temperature dependence of alpha-induced scintillation in the 1,1,4,4-tetraphenyl-1,3-butadiene wavelength shifter

Beyond Standard Model Searches in the MiniBooNE Experiment

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