T. R. Holmes
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View article: The radial acceleration relation at the EDGE of galaxy formation: testing its universality in low-mass dwarf galaxies
The radial acceleration relation at the EDGE of galaxy formation: testing its universality in low-mass dwarf galaxies Open
A tight correlation between the baryonic and observed acceleration of galaxies has been reported over a wide range of mass ($10^8 < M_{\rm bar}/{\rm M}_\odot < 10^{11}$) - the Radial Acceleration Relation (RAR). This has been interpreted a…
View article: Event Rates at a 10 TeV Muon Collider and Implications for Detector Design: Trigger, Data Acquisition, and Luminosity
Event Rates at a 10 TeV Muon Collider and Implications for Detector Design: Trigger, Data Acquisition, and Luminosity Open
This short document presents a discussion of rates of a wide range of processes at a muon collider. The goal is to provide a first look at what will fill the detector, how often processes of interest are occurring, and the implications for…
View article: United States Muon Collider Community White Paper for the European Strategy for Particle Physics Update
United States Muon Collider Community White Paper for the European Strategy for Particle Physics Update Open
This document is being submitted to the 2024-2026 European Strategy for Particle Physics Update (ESPPU) process on behalf of the US Muon Collider community, with its preparation coordinated by the interim US Muon Collider Coordination Grou…
View article: MAIA: A new detector concept for a 10 TeV muon collider
MAIA: A new detector concept for a 10 TeV muon collider Open
Muon colliders offer a compelling opportunity to explore the TeV scale and conduct precision tests of the Standard Model, all within a relatively compact geographical footprint. This paper introduces a new detector concept, MAIA (Muon Acce…
View article: Impro – Industrial Heat Demand Profile Tool: Load Profile Generator for Modelling Hourly Industrial Heat Demand at Different Temperature Levels
Impro – Industrial Heat Demand Profile Tool: Load Profile Generator for Modelling Hourly Industrial Heat Demand at Different Temperature Levels Open
View article: The Path to Global Discovery: U.S. Leadership and Partnership in Particle Physics
The Path to Global Discovery: U.S. Leadership and Partnership in Particle Physics Open
In February 2022, HEPAP, the High Energy Physics Advisory Panel to DOE (Department of Energy) and NSF (National Science Foundation), was charged with forming a subpanel to conduct an international benchmarking study to evaluate U.S. leader…
View article: Muon Collider Forum report
Muon Collider Forum report Open
A multi-TeV muon collider offers a spectacular opportunity in the direct exploration of the energy frontier. Offering a combination of unprecedented energy collisions in a comparatively clean leptonic environment, a high energy muon collid…
View article: Optimizing trigger-level track reconstruction for sensitivity to exotic signatures
Optimizing trigger-level track reconstruction for sensitivity to exotic signatures Open
A bstract Many compelling beyond the Standard Model scenarios predict signals that result in unconventional charged particle trajectories. Signatures for which unusual tracks are the most conspicuous feature of the event pose significant c…
View article: Theory, phenomenology, and experimental avenues for dark showers: a Snowmass 2021 report
Theory, phenomenology, and experimental avenues for dark showers: a Snowmass 2021 report Open
In this work, we consider the case of a strongly coupled dark/hidden sector, which extends the Standard Model (SM) by adding an additional non-Abelian gauge group. These extensions generally contain matter fields, much like the SM quarks, …
View article: Muon Collider Forum Report
Muon Collider Forum Report Open
A multi-TeV muon collider offers a spectacular opportunity in the direct exploration of the energy frontier. Offering a combination of unprecedented energy collisions in a comparatively clean leptonic environment, a high energy muon collid…
View article: Theory, phenomenology, and experimental avenues for dark showers: a\n Snowmass 2021 report
Theory, phenomenology, and experimental avenues for dark showers: a\n Snowmass 2021 report Open
In this work, we consider the case of a strongly coupled dark/hidden sector,\nwhich extends the Standard Model (SM) by adding an additional non-Abelian gauge\ngroup. These extensions generally contain matter fields, much like the SM\nquark…
View article: Prospects for the Measurement of the Standard Model Higgs Pair\n Production at the Muon Colliders
Prospects for the Measurement of the Standard Model Higgs Pair\n Production at the Muon Colliders Open
We study the Higgs pair production process at a muon collider using b-pair\ndecays of the Higgs bosons. Efficient identification and good measurement\nresolution for the b-jet pair invariant mass are crucial for unearthing the\ndi-Higgs si…
View article: Prospects for the Measurement of the Standard Model Higgs Pair Production at the Muon Colliders
Prospects for the Measurement of the Standard Model Higgs Pair Production at the Muon Colliders Open
We study the Higgs pair production process at a muon collider using b-pair decays of the Higgs bosons. Efficient identification and good measurement resolution for the b-jet pair invariant mass are crucial for unearthing the di-Higgs signa…
View article: Simulated Detector Performance at the Muon Collider
Simulated Detector Performance at the Muon Collider Open
In this paper we report on the current status of studies on the expected performance for a detector designed to operate in a muon collider environment. Beam-induced backgrounds (BIB) represent the main challenge in the design of the detect…
View article: Promising Technologies and R&D Directions for the Future Muon Collider Detectors
Promising Technologies and R&D Directions for the Future Muon Collider Detectors Open
Among the post-LHC generation of particle accelerators, the muon collider represents a unique machine with capability to provide very high energy leptonic collisions and to open the path to a vast and mostly unexplored physics programme. H…
View article: The physics case of a 3 TeV muon collider stage
The physics case of a 3 TeV muon collider stage Open
In the path towards a muon collider with center of mass energy of 10 TeV or more, a stage at 3 TeV emerges as an appealing option. Reviewing the physics potential of such muon collider is the main purpose of this document. In order to outl…
View article: Track-Based Triggers for Exotic Signatures
Track-Based Triggers for Exotic Signatures Open
Several compelling beyond the Standard Model scenarios predict signals that result in unconventional charged particle trajectories. Signatures for which unusual tracks are the most conspicuous feature pose significant challenges for experi…
View article: Muon Collider Physics Summary
Muon Collider Physics Summary Open
The perspective of designing muon colliders with high energy and luminosity, which is being investigated by the International Muon Collider Collaboration, has triggered a growing interest in their physics reach. We present a concise summar…
View article: Strategies for Beam-Induced Background Reduction at Muon Colliders
Strategies for Beam-Induced Background Reduction at Muon Colliders Open
Future collider detectors at muon colliders will be bombarded by Beam-Induced Backgrounds (BIB) due to the in-flight muon decays from the beam line. These backgrounds can inhibit the ability of the detector and subsequent data analysis to …
View article: Review of opportunities for new long-lived particle triggers in Run 3 of the Large Hadron Collider
Review of opportunities for new long-lived particle triggers in Run 3 of the Large Hadron Collider Open
Long-lived particles (LLPs) are highly motivated signals of physics Beyond the Standard Model (BSM) with great discovery potential and unique experimental challenges. The LLP search programme made great advances during Run 2 of the Large H…
View article: arXiv : Review of opportunities for new long-lived particle triggers in Run 3 of the Large Hadron Collider
arXiv : Review of opportunities for new long-lived particle triggers in Run 3 of the Large Hadron Collider Open
Long-lived particles (LLPs) are highly motivated signals of physics Beyond the Standard Model (BSM) with great discovery potential and unique experimental challenges. The LLP search programme made great advances during Run 2 of the Large H…
View article: Cooling and Timing Tests of the ATLAS Fast TracKer VME Boards
Cooling and Timing Tests of the ATLAS Fast TracKer VME Boards Open
The Fast TracKer (FTK) is an ATLAS trigger upgrade built for full-event, low-latency, high-rate tracking. The FTK core, made of 9U VME boards, performs the most demanding computational task. The associative memory board (AMB) serial link p…
View article: Track Triggers for Exotic Signatures at the LHC
Track Triggers for Exotic Signatures at the LHC Open
the RoI data for each possible track. The Enable Machine is an array processor that handles tracks of the same slope in parallel, and tracks of different slope in a pipeline. It is composed of two units, the Enable histogrammer unit and th…
View article: How to Limit the Beam-Induced Background in a Muon Collide
How to Limit the Beam-Induced Background in a Muon Collide Open
detail the interaction of muon decay products in the machine, while being able to change the machine optics itself to find the best configuration.In this contribution, a possible approach to such a purpose is presented, based on FLUKA for …
View article: Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider Open
Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at experiments such as the Large Hadron Collider (LHC) at CERN, these long-lived particles (LLP…
View article: Measurement of hadronic event shapes in multijet final states at $\\sqrt{s}=13$ TeV with the ATLAS detector
Measurement of hadronic event shapes in multijet final states at $\\sqrt{s}=13$ TeV with the ATLAS detector Open
A measurement of event-shape variables in proton$-$proton collisions at large momentum transfer is presented using data collected at $\\sqrt{s} = 13$ TeV with the ATLAS detector at the Large Hadron Collider. Six event-shape variables calcu…
View article: Test of the universality of $\tau$ and $\mu$ lepton couplings in $W$-boson decays from $t\bar{t}$ events with the ATLAS detector
Test of the universality of $\tau$ and $\mu$ lepton couplings in $W$-boson decays from $t\bar{t}$ events with the ATLAS detector Open
The Standard Model of particle physics encapsulates our current best understanding of physics at the smallest scales. A fundamental axiom of this theory is the universality of the couplings of the different generations of leptons to the el…
View article: Comparison of fragmentation functions for light-quark- and gluon-dominated jets from $pp$ and Pb+Pb collisions in ATLAS
Comparison of fragmentation functions for light-quark- and gluon-dominated jets from $pp$ and Pb+Pb collisions in ATLAS Open
Charged-particle fragmentation functions for jets azimuthally balanced by a high-transverse-momentum, prompt, isolated photon are measured in 25 pb−1 of pp and 0.49 nb−1 of Pb+Pb collision data at 5.02 TeV per nucleon pair recorded with th…
View article: A search for $B-L$ $R$-parity-violating top squarks in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS experiment
A search for $B-L$ $R$-parity-violating top squarks in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS experiment Open
A search is presented for the direct pair production of the stop, the supersymmetric partner of the top quark, that decays through an $R$-parity-violating coupling to a final state with two leptons and two jets, at least one of which is id…
View article: Measurement of longitudinal flow de-correlations in Pb+Pb collisions at $\sqrt{s_\mathrm{NN}} = 2.76$ and 5.02 TeV with the ATLAS detector : arXiv
Measurement of longitudinal flow de-correlations in Pb+Pb collisions at $\sqrt{s_\mathrm{NN}} = 2.76$ and 5.02 TeV with the ATLAS detector : arXiv Open