C. B. Gwilliam
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View article: Latest neutrino results from the FASER experiment and their implications for forward hadron production
Latest neutrino results from the FASER experiment and their implications for forward hadron production Open
The muon puzzle -- an excess of muons relative to simulation predictions in ultra-high-energy cosmic-ray air showers -- has been reported by many experiments. This suggests that forward particle production in hadronic interactions is not f…
View article: First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER
First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER Open
This Letter presents the measurement of the energy-dependent neutrino-nucleon cross section in tungsten and the differential flux of muon neutrinos and antineutrinos. The analysis is performed using proton-proton collision data at a center…
View article: Reconstruction and Performance Evaluation of FASER's Emulsion Detector at the LHC
Reconstruction and Performance Evaluation of FASER's Emulsion Detector at the LHC Open
This paper presents the reconstruction and performance evaluation of the FASER$ν$ emulsion detector, which aims to measure interactions from neutrinos produced in the forward direction of proton-proton collisions at the CERN Large Hadron C…
View article: Shining light on the dark sector: search for axion-like particles and other new physics in photonic final states with FASER
Shining light on the dark sector: search for axion-like particles and other new physics in photonic final states with FASER Open
A bstract The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at $$ \sqrt{s} $$ = 13 . 6 TeV collected in 2022 and 2023, corresponding to …
View article: First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER
First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER Open
This Letter presents the measurement of the energy-dependent neutrino-nucleon cross section in tungsten and the differential flux of muon neutrinos and antineutrinos. The analysis is performed using proton-proton collision data at a center…
View article: Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER
Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER Open
The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at $\sqrt{s}=13.6~\text{TeV}$ collected in 2022 and 2023, corresponding to an integrated …
View article: Neutrino rate predictions for FASER
Neutrino rate predictions for FASER Open
The Forward Search Experiment (FASER) at CERN’s Large Hadron Collider (LHC) has recently directly detected the first collider neutrinos. Neutrinos play an important role in all FASER analyses, either as signal or background, and it is ther…
View article: First Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>ν</mml:mi><mml:mi>e</mml:mi></mml:msub></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>ν</mml:mi><mml:mi>μ</mml:mi></mml:msub></mml:math> Interaction Cross Sections at the LHC with FASER’s Emulsion Detector
First Measurement of and Interaction Cross Sections at the LHC with FASER’s Emulsion Detector Open
The first results of the study of high-energy electron neutrino (νe) and muon neutrino (νμ) charged-current interactions in the FASERν emulsion-tungsten detector of the FASER experiment at the LHC are presented. A 128.8 kg subset of the FA…
View article: The FASER detector
The FASER detector Open
FASER, the ForwArd Search ExpeRiment, is an experiment dedicated to searching for light, extremely weakly-interacting particles at CERN's Large Hadron Collider (LHC). Such particles may be produced in the very forward direction of the LHC'…
View article: Search for dark photons with the FASER detector at the LHC
Search for dark photons with the FASER detector at the LHC Open
The FASER experiment at the LHC is designed to search for light, weakly-interacting particles produced in proton-proton collisions at the ATLAS interaction point that travel in the far-forward direction. The first results from a search for…
View article: Searches for New High-Mass Resonances Decaying to Fermions at the LHC
Searches for New High-Mass Resonances Decaying to Fermions at the LHC Open
Accelerator searches for new resonances have a long-standing history of discoveries that have driven advances in our understanding of nature. Since 2010, the Large Hadron Collider (LHC) has probed previously inaccessible energy scales, all…
View article: First Direct Observation of Collider Neutrinos with FASER at the LHC
First Direct Observation of Collider Neutrinos with FASER at the LHC Open
We report the first direct observation of neutrino interactions at a particle collider experiment. Neutrino candidate events are identified in a 13.6 TeV center-of-mass energy pp collision data set of 35.4 fb−1 using the active electronic …
View article: Background determination for the LUX-ZEPLIN dark matter experiment
Background determination for the LUX-ZEPLIN dark matter experiment Open
The LUX-ZEPLIN experiment recently reported limits on WIMP-nucleus interactions from its initial science run, down to 9.2 x 10–48 cm2 for the spin-independent interaction of a 36 GeV/c2 WIMP at 90% confiden…
View article: The Effect of Automated Error Message Feedback on Undergraduate Physics Students Learning Python: Reducing Anxiety and Building Confidence
The Effect of Automated Error Message Feedback on Undergraduate Physics Students Learning Python: Reducing Anxiety and Building Confidence Open
STEM fields, such as physics, increasingly rely on complex programs to analyse large datasets, thus teaching students the required programming skills is an important component of all STEM curricula. Since undergraduate students often have …
View article: First Direct Observation of Collider Neutrinos with FASER at the LHC
First Direct Observation of Collider Neutrinos with FASER at the LHC Open
We report the first direct observation of neutrino interactions at a particle collider experiment. Neutrino candidate events are identified in a 13.6 TeV center-of-mass energy $pp$ collision data set of 35.4 fb${}^{-1}$ using the active el…
View article: Fast and flexible analysis of direct dark matter search data with machine learning
Fast and flexible analysis of direct dark matter search data with machine learning Open
We present the results from combining machine learning with the profile likelihood fit procedure, using data from the Large Underground Xenon (LUX) dark matter experiment. This approach demonstrates reduction in computation time by a facto…
View article: Nuclear Recoil Calibration at Sub-keV Energies in LUX and Its Impact on Dark Matter Search Sensitivity
Nuclear Recoil Calibration at Sub-keV Energies in LUX and Its Impact on Dark Matter Search Sensitivity Open
Dual-phase xenon time projection chamber (TPC) detectors offer heightened sensitivities for dark matter detection across a spectrum of particle masses. To broaden their capability to low-mass dark matter interactions, we investigated the l…
View article: The FASER Detector
The FASER Detector Open
FASER, the ForwArd Search ExpeRiment, is an experiment dedicated to searching for light, extremely weakly-interacting particles at CERN's Large Hadron Collider (LHC). Such particles may be produced in the very forward direction of the LHC'…
View article: The tracking detector of the FASER experiment
The tracking detector of the FASER experiment Open
FASER is a new experiment designed to search for new light weakly-interacting long-lived particles (LLPs) and study high-energy neutrino interactions in the very forward region of the LHC collisions at CERN. The experimental apparatus is s…
View article: Cosmogenic production of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Ar</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>37</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> in the context of the LUX-ZEPLIN experiment
Cosmogenic production of in the context of the LUX-ZEPLIN experiment Open
We estimate the amount of 37Ar produced in natural xenon via cosmic-ray-induced spallation, an inevitable consequence of the transportation and storage of xenon on the Earth’s surface. We then calculate the resulting 37
View article: Recent Progress and Next Steps for the MATHUSLA LLP Detector
Recent Progress and Next Steps for the MATHUSLA LLP Detector Open
We report on recent progress and next steps in the design of the proposed MATHUSLA Long Lived Particle (LLP) detector for the HL-LHC as part of the Snowmass 2021 process. Our understanding of backgrounds has greatly improved, aided by deta…
View article: Design and commissioning of the FASER trigger and data acquisition system
Design and commissioning of the FASER trigger and data acquisition system Open
The FASER experiment is a new small and inexpensive experiment that is located 480 meters downstream of the ATLAS experiment at the CERN LHC. The experiment will shed light on currently unexplored phenomena, having the potential to make a …
View article: Fast and Flexible Analysis of Direct Dark Matter Search Data with Machine Learning
Fast and Flexible Analysis of Direct Dark Matter Search Data with Machine Learning Open
We present the results from combining machine learning with the profile likelihood fit procedure, using data from the Large Underground Xenon (LUX) dark matter experiment. This approach demonstrates reduction in computation time by a facto…
View article: Projected sensitivity of the LUX-ZEPLIN experiment to the two-neutrino and neutrinoless double <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math> decays of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Xe</mml:mi><mml:mprescripts/><mml:none/><mml:mn>134</mml:mn></mml:mmultiscripts></mml:math>
Projected sensitivity of the LUX-ZEPLIN experiment to the two-neutrino and neutrinoless double decays of Open
The projected sensitivity of the LUX-ZEPLIN (LZ) experiment to two-neutrino and neutrinoless double beta decay of 134Xe is presented. LZ is a 10-tonne xenon time projection chamber optimized for the detection of dark matter part…
View article: The trigger and data acquisition system of the FASER experiment
The trigger and data acquisition system of the FASER experiment Open
The FASER experiment is a new small and inexpensive experiment that is placed 480 meters downstream of the ATLAS experiment at the CERN LHC. FASER is designed to capture decays of new long-lived particles, produced outside of the ATLAS det…
View article: First neutrino interaction candidates at the LHC
First neutrino interaction candidates at the LHC Open
FASERν at the CERN Large Hadron Collider (LHC) is designed to directly detect collider neutrinos for the first time and study their cross sections at TeV energies, where no such measurements currently exist. In 2018, a pilot detector emplo…
View article: Projected sensitivities of the LUX-ZEPLIN experiment to new physics via low-energy electron recoils
Projected sensitivities of the LUX-ZEPLIN experiment to new physics via low-energy electron recoils Open
LUX-ZEPLIN is a dark matter detector expected to obtain world-leading sensitivity to weakly-interacting massive particles interacting via nuclear recoils with a ~7-tonne xenon target mass. This paper presents sensitivity projections to sev…
View article: Constraints on effective field theory couplings using 311.2 days of LUX data
Constraints on effective field theory couplings using 311.2 days of LUX data Open
We report here the results of a nonrelativistic effective field theory (EFT) WIMP search analysis using LUX data. We build upon previous LUX analyses by extending the search window to include nuclear recoil energies up to ~180 keVnr
View article: Improving sensitivity to low-mass dark matter in LUX using a novel electrode background mitigation technique
Improving sensitivity to low-mass dark matter in LUX using a novel electrode background mitigation technique Open
This paper presents a novel technique for mitigating electrode backgrounds that limit the sensitivity of searches for low-mass dark matter (DM) using xenon time projection chambers. In the Large Underground Xenon (LUX) detector, signatures…
View article: Studying neutrinos at the LHC: FASER and its impact to the cosmic-ray physics
Studying neutrinos at the LHC: FASER and its impact to the cosmic-ray physics Open
Studies of high energy proton interactions have been basic inputs to understand the cosmic-ray spectra observed on the earth. Yet, the experimental knowledge with controlled beams has been limited. In fact, uncertainties of the forward had…