A. Cappati
A5101735207- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Muon and positron interactions and applications
- Black Holes and Theoretical Physics
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- Distributed and Parallel Computing Systems
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Noncommutative and Quantum Gravity Theories
- Scientific Computing and Data Management
- Gamma-ray bursts and supernovae
- Nuclear physics research studies
- Stochastic processes and financial applications
- Medical Imaging Techniques and Applications
École Polytechnique
2021-2025
Laboratoire Leprince-Ringuet
2021-2025
Centre National de la Recherche Scientifique
2021-2025
A. Alikhanyan National Laboratory
2024
Institute of High Energy Physics
2024
University of Antwerp
2024
Institut National de Physique Nucléaire et de Physique des Particules
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2018-2023
University of Turin
2018-2023
Université de Strasbourg
2023
Abstract The Compact Muon Solenoid collaboration is designing a new high-granularity endcap calorimeter, HGCAL, to be installed later this decade. As part of development work, prototype system was built, with an electromagnetic section consisting 14 double-sided structures, providing 28 sampling layers. Each layer has hexagonal module, where multipad large-area silicon sensor glued between electronics circuit board and metal baseplate. pads approximately 1.1 cm 2 are wire-bonded the readout...
Abstract The upgrade of the CMS experiment for high luminosity operation LHC comprises replacement current endcap calorimeter by a granularity sampling (HGCAL). electromagnetic section HGCAL is based on silicon sensors interspersed between lead and copper (or tungsten) absorbers. hadronic uses layers stainless steel as an absorbing medium active in regions radiation exposure, scintillator tiles directly read out photomultipliers remaining regions. As part development detector its readout...
The design of a future multi-TeV muon collider needs new ideas to overcome the technological challenges related production, cooling, accumulation and acceleration. In this paper layout positron driven source known as Low EMittance Muon Accelerator (LEMMA) concept is presented. beam, stored in ring with high energy acceptance low emittance, extracted multi-target system, produce pairs at threshold. This solution alleviates issues power deposited integrated Peak Energy Density Deposition...
The muon collider represents one of the most promising solutions for a future machine exploring high energy frontier, but several challenges due to 2.2 $\mu$sec lifetime at rest have be carefully considered. LEMMA project is investigating possibility producing low emittance muon/antimuon pairs from e$^+$e$^-$ annihilation process threshold energy, resulting in small transverse beams without any additional beam cooling. However measurements available are performed higher $\sqrt{s}$ values. It...
Abstract This paper describes the experience with calibration, reconstruction and evaluation of timing capabilities CMS HGCAL prototype in beam tests 2018. The calibration procedure includes multiple steps corrections ranging from tens nanoseconds to a few hundred picoseconds. performance is studied using signals positron particles energies between 20 GeV 300 GeV. as function particle energy against an external reference well standalone by comparing two different halves prototype. resolution...
A bstract We analyse the sensitivity to beyond-the-Standard-Model effects of hadron-collider processes involving interaction two electroweak and Higgs bosons, VVHH, with V being either a W or Z boson. examine current experimental results by CMS collaboration in context dimension-8 extension Standard Model an effective-field-theory formalism. show that constraints from vector-boson-fusion Higgs-pair production on operators modify VVHH interactions are already comparable more stringent than...
As part of its HL-LHC upgrade program, the CMS collaboration is replacing existing endcap calorimeters with a high-granularity calorimeter (CE). The new sampling unprecedented transverse and longitudinal readout for both electromagnetic hadronic compartments. Due to compactness, intrinsic time resolution, radiation hardness, silicon has been chosen as active material regions exposed higher levels. sensors are fabricated 20 cm (8") wide hexagonal wafers segmented into several hundred pads...
The CMS drift tubes (DT) muon detector, built for withstanding the LHC expected integrated and instantaneous luminosities, will be used also in High Luminosity (HL-LHC) at a 5 times larger luminosity and, consequently, much higher levels of radiation, reaching about 10 luminosity. Initial irradiation tests spare DT chamber CERN gamma facility (GIF++), large (∼ O(100)) acceleration factor, showed ageing effects resulting degradation cell performance. However, full simulations have shown...
This work introduces an experimental test of the new proposal for a low–emittance muon accelerator (LEMMA). A beam is obtained from e$^+$ e$^-$ → μ$^+$ μ$^-$ annihilation process at threshold energy 45 GeV eliminating need dedicated cooling system. series two testbeam campaigns were carried out CERN to validate this concept. The setup presented together with first preliminary results data.
Abstract A novel method to reconstruct the energy of hadronic showers in CMS High Granularity Calorimeter (HGCAL) is presented. The HGCAL a sampling calorimeter with very fine transverse and longitudinal granularity. active media are silicon sensors scintillator tiles readout by SiPMs absorbers combination lead Cu/CuW electromagnetic section, steel section. shower reconstruction based on graph neural networks it makes use dynamic reduction network architecture. It shown that algorithm able...
This work introduces a new proposal for low--emittance muon accelerator (LEMMA) in which beam is obtained from the e$^+$e$^-\rightarrow\mu^+\mu^-$ annihilation process with positrons at threshold energy of 45 GeV. The experimental test setup implemented to validate this concept presented together preliminary results data.
This paper describes the experience with calibration, reconstruction and evaluation of timing capabilities CMS HGCAL prototype in beam tests 2018. The calibration procedure includes multiple steps corrections ranging from tens nanoseconds to a few hundred picoseconds. performance is studied using signals positron particles energies between 20 GeV 300 GeV. as function particle energy against an external reference well standalone by comparing two different halves prototype. resolution found be...
To sustain and extend its discovery potential, the Large Hadron Collider (LHC) will undergo a major upgrade in coming years, referred to as High Luminosity LHC (HLLHC), aimed increase instantaneous luminosity, 5 times larger than designed limit, and, consequently leading high levels of radiation, with goal collect 10 original integrated luminosity. The drift tube chambers (DT) CMS muon detector system is built proficiently measure trigger on muons harsh radiation environment expected during...
The most recent results from searches for non-resonant production of Higgs boson pairs (HH) at CMS are presented. Four final states have been studied, with data collected $\sqrt{s}=13\,\mathrm{TeV}$ in 2016, corresponding to an integrated luminosity $35.9\,\mathrm{fb}^{-1}$. combination the four channels can set observed (expected) upper limit on HH cross section 22.2 (12.8) times SM prediction. Beyond scenarios also explored.