A. Mestvirishvili
A5036308772- 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
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Gamma-ray bursts and supernovae
- Nuclear reactor physics and engineering
- Distributed and Parallel Computing Systems
- Atomic and Subatomic Physics Research
- Stochastic processes and financial applications
- Radioactivity and Radon Measurements
- Nuclear physics research studies
- Radiation Therapy and Dosimetry
- International Science and Diplomacy
- Muon and positron interactions and applications
- Nuclear Physics and Applications
- Superconducting Materials and Applications
Georgian Technical University
2021-2025
University of Iowa
2016-2025
Austrian Academy of Sciences
2016
Johns Hopkins University
2014
European Organization for Nuclear Research
2009-2014
Joint Institute for Nuclear Research
2000-2006
The direct CP violation parameter Re(epsilon'/epsilon) has been measured from the decay rates of neutral kaons into two pions using NA48 detector at CERN SPS. 2001 running period was devoted to collecting additional data under varied conditions compared earlier years (1997-99). new yield result: = (13.7 +/- 3.1) times 10^{-4}. Combining this result with that published 1997, 98 and 99 data, an overall value (14.7 2.2) 10^{-4} is obtained experiment.
The RADiCAL Collaboration is conducting R&D on high performance electromagnetic (EM) calorimetry to address the challenges expected in future collider experiments under conditions of luminosity and/or irradiation (FCC-ee, FCC-hh, fixed target and forward physics environments). Under development a sampling calorimeter approach, known as modules, based scintillation, wavelength-shifting (WLS) technologies photosensor, including SiPM or SiPM-like technology. modules discussed herein consist...
We present a measurement of the ratio decay rates Gamma(KL -> pi+ pi-)/Gamma(KL pi e nu), denoted as Gamma(K2pi)/Gamma(Ke3). The analysis is based on data taken during dedicated run in 1999 by NA48 experiment at CERN SPS. Using sample 47000 K2pi and five million Ke3 decays, we find Gamma(K2pi)/Gamma(Ke3) = (4.835 +- 0.022(stat) 0.016(syst)) x 10^-3. From this derive branching CP violating KL pi- violation parameter |eta+-|. Excluding conserving direct photon emission component gamma, obtain...
The Large Hadron Collider (LHC) is going to start taking data with 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">33</sup> cm xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> s xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> luminosity, and reach the designed value of xmlns:xlink="http://www.w3.org/1999/xlink">34</sup> in 2013. LHC luminosity will continue improve each year, reaching xmlns:xlink="http://www.w3.org/1999/xlink">35</sup>...
The KS->gamma gamma decay rate has been measured with the NA48 detector using a high intensity short neutral beam from CERN SPS. branching ratio BR(KS->gamma gamma)=(2.78+-0.06(stat)+-0.04(syst))x10-6, obtained 7461+-172 events, is significantly higher than O(p^4) prediction of Chiral Perturbation Theory. Using KL BR(KL->gamma gamma)/BR(KL->3pi0)=(2.81+-0.01(stat)+-0.02(syst))x10-3 measured.
The RADiCAL Collaboration is conducting R\&D on high performance electromagnetic (EM) calorimetry to address the challenges expected in future collider experiments under conditions of luminosity and/or irradiation (FCC-ee, FCC-hh and fixed target forward physics environments). Under development a sampling calorimeter approach, known as modules, based scintillation wavelength-shifting (WLS) technologies photosensor, including SiPM SiPM-like technology. modules discussed herein consist...
The $K_L\toπ^{\pm}π^0e^{\mp}ν_e(\barν_e)$ decay was investigated with the NA48 detector at CERN SPS using a beam of long-lived neutral kaons. branching ratio $Br(K_L\toπ^{\pm}π^0e^{\mp}ν_e(\barν_e))=(5.21\pm 0.07_{stat}\pm 0.09_{syst})\times 10^{-5}$ fixed from sample 5464 events 62 background events. form factors $\bar{f}_s$, $\bar{f}_p$, $λ_g$ and $\bar{h}$ were found to be in agreement previous measurements but higher accuracy. coupling parameter chiral Lagrangian $L_3=(-4.1\pm 0.2)\times...
Due to an expected increase in radiation damage under super-LHC conditions, we propose substitute the scintillator tiles original design of CMS hadronic endcap (HE) calorimeter with quartz plates. Quartz is proved be hard by various tests, but light produced comes from Cerenkov process, and it 100 times less than scintillation photons. To enhance production treated plates p-Terphenyl, constructed a 20 layers prototype. Here, report test beam results for electromagnetic capabilities prototype...
Abstract The two Zero Degree Calorimeters (ZDCs) of the CMS experiment are located at ± 140 m from collision point and detect neutral particles in |η| > 8.3 pseudorapidity region. This paper presents a study on performance ZDC 2016 pPb run. response detectors to ultrarelativistic neutrons is studied using in-depth Monte Carlo simulations. A method signal extraction based template fits presented, along with dedicated calibration procedure. deconvolution technique for correction overlapping...