High Luminosity Large Hadron Collider HL-LHC

Apollinari, G.; Bruening, Oliver; Nakamoto, T.; Rossi, L.

doi:10.5170/cern-2015-005.1

Cited by 85 publications

(84 citation statements)

References 1 publication

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“…the singletscalar boson mass and the U(1) X gauge boson mass. The future collider experiments such as the High-Luminosity Large Hadron Collider (HL-LHC) [109] and the International Linear Collider (ILC) [110] could find these particles.…”

Section: Discussionmentioning

confidence: 99%

Scalegenesis and fermionic dark matters in the flatland scenario

Hamada,

Tsumura,

Yamada

2020

Preprint

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We propose an extension of the standard model with Majorana-type fermionic dark matters based on the flatland scenario where all scalar coupling constants, including scalar mass terms, vanish at the Planck scale, i.e. the scalar potential is flat above the Planck scale. This scenario could be compatible with the asymptotic safety paradigm for quantum gravity. We search the parameter space so that the model reproduces the observed values such as the Higgs mass, the electroweak vacuum and the relic abundance of dark matter. We also investigate the spin-independent elastic cross section for the Majorana fermions and a nucleon. It is shown that the Majorana fermions as dark matter candidates could be tested by dark matter direct detection experiments such as XENON, LUX and PandaX-II. We demonstrate that within the minimal setup compatible with the flatland scenario at the Planck scale or asymptotically safe quantum gravity, the extended model could have a strong predictability.

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Section: Discussionmentioning

confidence: 99%

Scalegenesis and fermionic dark matters in the flatland scenario

Hamada,

Tsumura,

Yamada

2020

Preprint

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“…In real situations, we may have to deal with a tremendous amount of data for physics analyses. The computational cost is of particular importance, as the integrated luminosity of the current LHC experiment increases by order of magnitude, and the High-Luminosity LHC project is on the horizon [53]. Given limited computing resources and human time, a cost-effective way without damaging or deteriorating the results will be the most preferable.…”

Section: Implementation and Performance Comparisonsmentioning

confidence: 99%

YAM2: Yet another library for the $M_2$ variables using sequential quadratic programming

Park

2020

Preprint

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The M 2 variables are devised to extend M T 2 by promoting transverse masses to Lorentzinvariant ones and making explicit use of on-shell mass relations. Unlike simple kinematic variables such as the invariant mass of visible particles, where the variable definitions directly provide how to calculate them, the calculation of the M 2 variables is undertaken by employing numerical algorithms. Essentially, the calculation of M 2 corresponds to solving a constrained minimization problem in mathematical optimization, and various numerical methods exist for the task. We find that the sequential quadratic programming method performs very well for the calculation of M 2 , and its numerical performance is even better than the method implemented in the existing software package for M 2 . As a consequence of our study, we have developed and released yet another software library, YAM2, for calculating the M 2 variables using several numerical algorithms.

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“…The implementation of projects such as the HL-LHC [1] and FCC [2] is closely linked to the refinement of vertex detectors. Environmental conditions at the HL-LHC provide a unique challenge for detector design, where high spatial and temporal resolutions must be maintained in an extreme radiation environment.…”

Section: Introductionmentioning

confidence: 99%

Time Resolution of an Irradiated 3D Silicon Pixel Detector

et al. 2022

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We report on the measurements of time resolution for double-sided 3D pixel sensors with a single cell of 50 μm × 50 μm and thickness of 285 μm, fabricated at IMB-CNM and irradiated with reactor neutrons from 8 ×1014 1MeV neq/cm2 to 1.0 ×1016 1MeV neq/cm2. The time resolution measurements were conducted using a radioactive source at a temperature of −20 and 20 °C in a bias voltage range of 50–250 V. The reference time was provided by a low gain avalanche detector produced by Hamamatsu. The results are compared to measurements conducted prior to irradiation where a temporal resolution of about 50 ps was measured. These are the first ever timing measurements on an irradiated 3D sensor and which serve as a basis for understanding their performance and to explore the possibility of performing 4D tracking in high radiation environments, such as the innermost tracking layers of future high energy physics experiments.

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High Luminosity Large Hadron Collider HL-LHC

Cited by 85 publications

References 1 publication

Scalegenesis and fermionic dark matters in the flatland scenario

Scalegenesis and fermionic dark matters in the flatland scenario

YAM2: Yet another library for the $M_2$ variables using sequential quadratic programming

Time Resolution of an Irradiated 3D Silicon Pixel Detector

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