S. Vlachos

ORCID: 0000-0002-1879-3745
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About
Contact & Profiles
Research Areas
  • 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
  • Neutrino Physics Research
  • Computational Physics and Python Applications
  • Black Holes and Theoretical Physics
  • Particle Accelerators and Free-Electron Lasers
  • Atomic and Subatomic Physics Research
  • Radiation Detection and Scintillator Technologies
  • Astrophysics and Cosmic Phenomena
  • Distributed and Parallel Computing Systems
  • Medical Imaging Techniques and Applications
  • advanced mathematical theories
  • Superconducting Materials and Applications
  • Nuclear Physics and Applications
  • Muon and positron interactions and applications
  • Nuclear physics research studies
  • Particle accelerators and beam dynamics
  • Nuclear reactor physics and engineering
  • Atomic and Molecular Physics
  • Advanced Measurement and Metrology Techniques
  • Stochastic processes and statistical mechanics

National Technical University of Athens
2014-2023

European Organization for Nuclear Research
2003-2019

The University of Adelaide
2013-2019

Ludwig-Maximilians-Universität München
2011-2019

The University of Texas at Arlington
2015-2019

LIP - Laboratory of Instrumentation and Experimental Particle Physics
2014-2016

Budker Institute of Nuclear Physics
2016

Siberian Branch of the Russian Academy of Sciences
2016

Universidad de Granada
2009-2016

Universidade Federal do Rio de Janeiro
2015

The goal of the DIRAC experiment at CERN (PS212) is to measure $\pi^+\pi^-$ atom lifetime with 10% precision. Such a measurement would yield precision 5% on value $S$-wave $\pi\pi$ scattering lengths combination $|a_0-a_2|$. Based part collected data we present first result lifetime, $\tau=[2.91 ^{+0.49}_{-0.62}]\times 10^{-15}$ s, and discuss major systematic errors. This corresponds $|a_0-a_2|=0.264 ^{+0.033}_{-0.020} m_{\pi}^{-1}$.

10.1016/j.physletb.2005.05.045 article EN cc-by Physics Letters B 2005-06-01

We use fits to recent published CPLEAR data on neutral kaon decays $π^+π^-$ and $πeν$ constrain the CPT--violation parameters appearing in a formulation of system as an open quantum-mechanical system. The obtained upper limits are approaching range suggested by certain ideas concerning quantum gravity.

10.1016/0370-2693(95)01416-0 article EN cc-by-nc-nd Physics Letters B 1995-12-01

The DIRAC experiment at CERN has achieved a sizeable production of $\pi^+\pi^-$ atoms and significantly improved the precision on its lifetime determination. From sample 21227 atomic pairs, 4% measurement S-wave $\pi\pi$ scattering length difference $|a_0-a_2| = (.0.2533^{+0.0080}_{-0.0078}|_\mathrm{stat}.{}^{+0.0078}_{-0.0073}|_\mathrm{syst})M_{\pi^+}^{-1}$ been attained, providing an important test Chiral Perturbation Theory.

10.1016/j.physletb.2011.08.074 article EN cc-by Physics Letters B 2011-09-06

The goal of the DIRAC experiment at CERN is to measure with high precision lifetime π + -atom (A 2π ), which order 3×10 -15 s, and thus determine s-wave ππ-scattering lengths difference |a 0 -a 2 |.A atoms are detected through characteristic features -pairs from atom break-up (ionization) in target.We report on a first statistics atomic data sample obtained p Ni interactions 24 GeV/c proton momentum present methods separate signal background.

10.1088/0954-3899/30/12/012 article EN Journal of Physics G Nuclear and Particle Physics 2004-11-03

10.1016/s0168-9002(98)01134-6 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 1999-01-01

10.1016/s0168-9002(02)01277-9 article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 2002-10-01

10.1016/0168-9002(93)90995-t article EN Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 1993-01-01
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