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Publications (23)

physics.comp-ph2018

Developing a Bubble Chamber Particle Discriminator Using Semi-Supervised Learning

B. Matusch, C. Amole, M. Ardid +70

The identification of non-signal events is a major hurdle to overcome for bubble chamber dark matter experiments such as PICO-60. The current practice of manually developing a disc…

astro-ph2007

The pulsation modes of the pre-white dwarf PG 1159-035

J. E. S. Costa, S. O. Kepler, D. E. Winget +74

PG 1159-035, a pre-white dwarf with T_eff=140,000 K, is the prototype of both two classes: the PG1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-0…

hep-ex2018

Improved Search for Heavy Neutrinos in the Decay $I ¨ \to e I^½$

A. Aguilar-Arevalo, M. Aoki, M. Blecher +21

A search for massive neutrinos has been made in the decay $I ¨ \to e^{+} I^½$ . No evidence was found for extra peaks in the positron energy spectrum indicative of pion decays in…

hep-ex2018

Improved Search for Heavy Neutrinos and a Test of Lepton Universality in the Decay $Ï^+ \rightarrow \mbox{e}^+ Î½$

R. E. Mischke, A. Aguilar-Arevalo, M. Aoki +21

Two results from the PIENU Experiment are presented reporting a test of lepton universality in pion decay and improved limits on heavy neutrinos coupling to positrons. The status o…

hep-ex2025

European Strategy for Particle Physics Update -- PIONEER: a next generation rare pion decay experiment

PIONEER Collaboration, A. Adelmann, W. Altmannshofer +76

PIONEER is a rapidly developing effort aimed to perform a pristine test of lepton flavour universality (LFU) and of the unitarity of the first row of the CKM matrix by significantl…

physics.acc-ph2000

High Current Proton Tests of the Fermilab Linac

M. Popovic, L. Allen, A. Moretti +3

The peak current limit for the Fermilab Linac was recently studied. The purpose was to learn what components of the present Linac can be used for the first stage of a proposed prot…

hep-ex2021

Search for three body pion decays $I ¨ ^{+} \to l^{+} I^½ X$

A. Aguilar-Arevalo, M. Aoki, M. Blecher +21

The three body pion decays $I ¨ ^{+} \to l^{+} I^½ X (l = e, I^¼)$ , where $X$ is a weakly interacting neutral boson, were searched for using the full data set from the PIENU experiment.…

hep-ex2022

PIONEER: Studies of Rare Pion Decays

PIONEER Collaboration, W. Altmannshofer, H. Binney +58

A next-generation rare pion decay experiment, PIONEER, is strongly motivated by several inconsistencies between Standard Model (SM) predictions and data pointing towards the potent…

hep-ex2022

Testing Lepton Flavor Universality and CKM Unitarity with Rare Pion Decays in the PIONEER experiment

PIONEER Collaboration, W. Altmannshofer, H. Binney +58

The physics motivation and the conceptual design of the PIONEER experiment, a next-generation rare pion decay experiment testing lepton flavor universality and CKM unitarity, are d…

physics.ins-det2015

Status of the TRIUMF PIENU Experiment

S. Ito, A. Aguilar-Arevalo, M. Aoki +21

The PIENU experiment at TRIUMF aims to measure the pion decay branching ratio $R = I^ (I ¨ ^{+} \to e^{+} I^½_{e} (I^^{3})) / I^ (I ¨ ^{+} \to I^¼^{+} I^½_{I^} ¼ (I^^{3}))$ with precision $< 0.1$ % to prov…

astro-ph.HE2020

Velocity independent constraints on spin-dependent DM-nucleon interactions from IceCube and PICO

IceCube Collaboration, M. G. Aartsen, M. Ackermann +419

Adopting the Standard Halo Model (SHM) of an isotropic Maxwellian velocity distribution for dark matter (DM) particles in the Galaxy, the most stringent current constraints on thei…

astro-ph2003

The Everchanging Pulsating White Dwarf GD358

S. O. Kepler, R. E. Nather, D. E. Winget +43

We report 323 hours of nearly uninterrupted time series photometric observations of the DBV star GD 358 acquired with the Whole Earth Telescope (WET) during May 23rd to June 8th, 2…

hep-ex2020

Improved search for two body muon decay $I^¼^{+} \to e^{+} X_{H}$

A. Aguilar-Arevalo, M. Aoki, M. Blecher +21

Charged lepton flavor violating muon decay $I^¼^{+} \to e^{+} X_{H}$ , where $X_{H}$ is a massive neutral boson, was sought by searching for extra peaks in the muon decay $Î¼^+{\right…

physics.ins-det2020

Data-Driven Modeling of Electron Recoil Nucleation in PICO C $_{3}$ F $_{8}$ Bubble Chambers

C. Amole, M. Ardid, I. J. Arnquist +76

The primary advantage of moderately superheated bubble chamber detectors is their simultaneous sensitivity to nuclear recoils from WIMP dark matter and insensitivity to electron re…

hep-ex2011

Search for Massive Neutrinos in the Decay pi --> e nu

PIENU Collaboration, M. Aoki, M. Blecher +20

Evidence of massive neutrinos in the pi --> e nu decay spectrum was sought with the background pi --> mu --> e decay chain highly suppressed. Upper limits (90% C.L.) on the neutrin…

hep-ex2015

Improved measurement of the $Ï\rightarrow \mbox{e} Î½$ branching ratio

A. Aguilar-Arevalo, M. Aoki, M. Blecher +23

A new measurement of the branching ratio, $R_{e/Î¼} =Î(Ï^+ \rightarrow \mbox{e}^+ Î½+ Ï^+ \rightarrow \mbox{e}^+ Î½Î³)/ Î(Ï^+ \rightarrow Î¼^+ Î½+ Ï^+ \rightarrow Î¼^+ Î½Î³)$…

astro-ph.CO2019

Dark Matter Search Results from the Complete Exposure of the PICO-60 C $_{3}$ F $_{8}$ Bubble Chamber

C. Amole, M. Ardid, I. J. Arnquist +69

Final results are reported from operation of the PICO-60 C $_{3}$ F $_{8}$ dark matter detector, a bubble chamber filled with 52 kg of C $_{3}$ F $_{8}$ located in the SNOLAB underground laborat…

physics.ins-det2015

Detector for measuring the $I ¨ ^{+} \to e^{+} I^½_{e}$ branching fraction

A. A. Aguilar-Arevalo, M. Aoki, M. Blecher +24

The PIENU experiment at TRIUMF is aimed at a measurement of the branching ratio $R^{e / I^¼}$ = ${Î\big((Ï^{+} \rightarrow e^{+} Î½_{e}) + (Ï^{+} \rightarrow e^{+} Î½_{e}Î³)\big)}/…

hep-ex2019

Search for Heavy Neutrinos in $I ¨ \to I^¼ I^½$ Decay

A. Aguilar-Arevalo, M. Aoki, M. Blecher +21

Heavy neutrinos were sought in pion decays $I ¨ ^{+} \to I^¼^{+} I^½$ by examining the observed muon energy spectrum for extra peaks in addition to the expected peak for a massless…

physics.acc-ph2006

An experimentally robust technique for halo measurement using the IPM at the Fermilab Booster

J. Amundson, W. Pellico, L. Spentzouris +2

We propose a model-independent quantity, $L / G$ , to characterize non-Gaussian tails in beam profiles observed with the Fermilab Booster Ion Profile Monitor. This quantity can be con…

astro-ph.IM2017

The OSIRIS-REx Visible and InfraRed Spectrometer (OVIRS): Spectral Maps of the Asteroid Bennu

D. C. Reuter, A. A. Simon, J. Hair +19

The OSIRIS-REx Visible and Infrared Spectrometer (OVIRS) is a point spectrometer covering the spectral range of 0.4 to 4.3 microns (25,000-2300 cm-1). Its primary purpose is to map…

hep-ex2024

Measurement of the response function of the PIENU calorimeter

A. Aguilar-Arevalo, M. Aoki, M. Blecher +17

Measurements of the response function of the PIENU NaI(T $ℓ$ ) and CsI crystal calorimeter using a monochromatic 70 MeV/c positron beam at various incidence angles are described.…

hep-ex2020

Search for the rare decays $I ¨ ^{+} \to I^¼^{+} I^½_{I^} ¼ I^½ I^ˉ ½$ and $I ¨ ^{+} \to e^{+} I^½_{e} I^½ I^ˉ ½$

A. Aguilar-Arevalo, M. Aoki, M. Blecher +23

The rare pion decays $I ¨ ^{+} \to I^¼^{+} I^½_{I^} ¼ I^½ I^ˉ ½$ and $I ¨ ^{+} \to e^{+} I^½_{e} I^½ I^ˉ ½$ are allowed in the Standard Model but highly suppressed. These decays were search…

Publications (23)

Developing a Bubble Chamber Particle Discriminator Using Semi-Supervised Learning

The pulsation modes of the pre-white dwarf PG 1159-035

Improved Search for Heavy Neutrinos in the Decay I¨→eI^½

Improved Search for Heavy Neutrinos and a Test of Lepton Universality in the Decay $Ï^+ \rightarrow \mbox{e}^+ Î½$

European Strategy for Particle Physics Update -- PIONEER: a next generation rare pion decay experiment

High Current Proton Tests of the Fermilab Linac

Search for three body pion decays I¨+→l+I^½X

PIONEER: Studies of Rare Pion Decays

Testing Lepton Flavor Universality and CKM Unitarity with Rare Pion Decays in the PIONEER experiment

Status of the TRIUMF PIENU Experiment

Velocity independent constraints on spin-dependent DM-nucleon interactions from IceCube and PICO

The Everchanging Pulsating White Dwarf GD358

Improved search for two body muon decay I^¼+→e+XH​

Data-Driven Modeling of Electron Recoil Nucleation in PICO C3​F8​ Bubble Chambers

Search for Massive Neutrinos in the Decay pi --> e nu

Improved measurement of the $Ï\rightarrow \mbox{e} Î½$ branching ratio

Dark Matter Search Results from the Complete Exposure of the PICO-60 C3​F8​ Bubble Chamber

Detector for measuring the I¨+→e+I^½e​ branching fraction

Search for Heavy Neutrinos in I¨→I^¼I^½ Decay

An experimentally robust technique for halo measurement using the IPM at the Fermilab Booster

The OSIRIS-REx Visible and InfraRed Spectrometer (OVIRS): Spectral Maps of the Asteroid Bennu

Measurement of the response function of the PIENU calorimeter

Search for the rare decays I¨+→I^¼+I^½I^​¼I^½I^ˉ½ and I¨+→e+I^½e​I^½I^ˉ½

Improved Search for Heavy Neutrinos in the Decay $I ¨ \to e I^½$

Improved Search for Heavy Neutrinos and a Test of Lepton Universality in the Decay $Ï^+ \rightarrow \mbox{e}^+ Î½$

Search for three body pion decays $I ¨ ^{+} \to l^{+} I^½ X$

Improved search for two body muon decay $I^¼^{+} \to e^{+} X_{H}$

Data-Driven Modeling of Electron Recoil Nucleation in PICO C $_{3}$ F $_{8}$ Bubble Chambers

Improved measurement of the $Ï\rightarrow \mbox{e} Î½$ branching ratio

Dark Matter Search Results from the Complete Exposure of the PICO-60 C $_{3}$ F $_{8}$ Bubble Chamber

Detector for measuring the $I ¨ ^{+} \to e^{+} I^½_{e}$ branching fraction

Search for Heavy Neutrinos in $I ¨ \to I^¼ I^½$ Decay

Search for the rare decays $I ¨ ^{+} \to I^¼^{+} I^½_{I^} ¼ I^½ I^ˉ ½$ and $I ¨ ^{+} \to e^{+} I^½_{e} I^½ I^ˉ ½$