W. H. Smith
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View article: Beyond Time Complexity: Data Movement Complexity Analysis for Matrix Multiplication
Beyond Time Complexity: Data Movement Complexity Analysis for Matrix Multiplication Open
Data movement is becoming the dominant contributor to the time and energy costs of computation across a wide range of application domains. However, time complexity is inadequate to analyze data movement. This work expands upon Data Movemen…
View article: Summary of the Particle Physics and Technology Working Group
Summary of the Particle Physics and Technology Working Group Open
Progress in particle physics has been tightly related to technological advances during the past half century. Progress in technologies has been driven in many cases by the needs of particle physics. Often, these advances have benefited fie…
View article: Triggering and High-Level Data Selection
Triggering and High-Level Data Selection Open
The data taken by a particle physics collider detector consists of events, which are snapshots of the detector data at specific intervals in time. Usually these snapshots are taken at the frequency of the crossing of the colliding beams. F…
View article: Prospects for Lorentz-Violation Searches at the LHC and Future Colliders
Prospects for Lorentz-Violation Searches at the LHC and Future Colliders Open
Hadron colliders are providing a unique opportunity for testing Lorentz invariance and CPT symmetry at high energy and in a laboratory. A first measurement in the top-quark sector was performed at the Tevatron. We present here prospective …
View article: Measurement of the Spectral Function for the τ⁻→ K⁻K[subscript S]ν[subscript τ] Decay
Measurement of the Spectral Function for the τ⁻→ K⁻K[subscript S]ν[subscript τ] Decay Open
The decay τ⁻→K⁻K[subscript S]ν[subscript τ] has been studied using 430×10⁶ e⁺e⁻→τ⁺τ⁻ events produced at a center-of-mass energy around 10.6 GeV at the PEP-II collider and studied with the BABAR detector. The mass spectrum of the K⁻K[subscr…
View article: Correlations of $\\mu\\mu$, $e\\mu$, and $ee$ pairs in $p$+$p$ collisions\n at $\\sqrt{s}=200$ GeV and implications for $c\\bar{c}$ and $b\\bar{b}$\n production mechanisms
Correlations of $\\mu\\mu$, $e\\mu$, and $ee$ pairs in $p$+$p$ collisions\n at $\\sqrt{s}=200$ GeV and implications for $c\\bar{c}$ and $b\\bar{b}$\n production mechanisms Open
PHENIX has measured the azimuthal correlations of muon pairs from charm and\nbottom semi-leptonic decays in $p$+$p$ collisions at $\\sqrt{s}=200$ GeV, using\na novel analysis technique utilizing both unlike- and like-sign muon pairs to\nse…
View article: Next Generation ATCA Control Infrastructure for the CMS Phase-2 Upgrades
Next Generation ATCA Control Infrastructure for the CMS Phase-2 Upgrades Open
A next generation control infrastructure to be used in Advanced TCA (ATCA) blades at CMS experiment is being designed and tested. Several ATCA systems are being prepared for the High-Luminosity LHC (HL-LHC) and will be installed at CMS dur…
View article: High Energy Physics Research: Experimental & Theoretical (Final Report)
High Energy Physics Research: Experimental & Theoretical (Final Report) Open
The research at the energy frontier was to explore high energy and luminosity collisions at the LHC using the ATLAS and CMS detectors to lead physics analyses in characterization of the Higgs Boson, to search for its potential partners, to…
View article: The CMS Level-1 Calorimeter Trigger for the LHC Run II
The CMS Level-1 Calorimeter Trigger for the LHC Run II Open
Results from the completed Phase 1 Upgrade of the Compact Muon Solenoid (CMS) Level-1 Calorimeter Trigger are presented. The upgrade was performed in two stages, with the first running in 2015 for proton and heavy ion collisions and the fi…
View article: Tests of CPT symmetry in B^0-Bbar^0 mixing and in B^0 → ccbarK^0 decays
Tests of CPT symmetry in B^0-Bbar^0 mixing and in B^0 → ccbarK^0 decays Open
Using the eight time dependences e^(−Γt)(1+C_(i)cosΔmt+S_(i)sinΔmt) for the decays ϒ(4S) → B^(0)Bbar^0 → f_(j)f_(k), with the decay into a flavor-specific state f_j = ℓ^(±)X before or after the decay into a CP eigenstate f_k = ccbarK_(S,L)…
View article: Run 2 upgrades to the CMS Level-1 calorimeter trigger
Run 2 upgrades to the CMS Level-1 calorimeter trigger Open
The CMS Level-1 calorimeter trigger is being upgraded in two stages to maintain performance as the LHC increases pile-up and instantaneous luminosity in its second run. In the first stage, improved algorithms including event-by-event pile-…
View article: Run 2 Upgrades to the CMS Level-1 Calorimeter Trigger
Run 2 Upgrades to the CMS Level-1 Calorimeter Trigger Open
The CMS Level-1 calorimeter trigger is being upgraded in two stages to maintain performance as the LHC increases pile-up and instantaneous luminosity in its second run. In the first stage, improved algorithms including event-by-event pile-…
View article: Observation of the baryonic decay [bar over B][superscript 0 → Λ[+ over c][bar over p]K[superscript -]K[superscript +]
Observation of the baryonic decay [bar over B][superscript 0 → Λ[+ over c][bar over p]K[superscript -]K[superscript +] Open
We report the observation of the baryonic decay [bar over B][superscript 0 → Λ[+ over c][bar over p]K[superscript -]K[superscript +] using a data sample of 471 × 10[superscript 6] B[bar over B] pairs produced in e[superscript +]e[superscri…