A.-M. Lutz
A5010204033- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Advanced NMR Techniques and Applications
- Stochastic processes and statistical mechanics
- Advanced Data Storage Technologies
- Theoretical and Computational Physics
- International Science and Diplomacy
- Scientific Measurement and Uncertainty Evaluation
- Optical Systems and Laser Technology
- Computability, Logic, AI Algorithms
- Electron and X-Ray Spectroscopy Techniques
Centre National de la Recherche Scientifique
1993-2017
Université Paris-Sud
1994-2017
Centre Hospitalier d'Orsay
2014
Université Paris Cité
1990-2000
Laboratoire d’Annecy de Physique des Particules
1992-1998
Institut National de Physique Nucléaire et de Physique des Particules
1992-1998
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
1996
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
1996
European Organization for Nuclear Research
1990-1996
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
1996
The double ratio R of the relative decay rates short- and long-lived neutral kaons into two charged pions was measured to be 0.980±0.004±0.005. deviation from CP violation in transition CP-odd K2 with ϵ′/ϵ=(3.3 ± 1.1)×10−3.
A dedicated measurement of additional radiation in e+e−→μ+μ−γ and e+e−→π+π−γ initial-state-radiation events is presented using the full BABAR data sample. For first time results are at next-to- next-to-next-to-leading order, with one two photons, respectively, for from initial final states. Comparison predictions phokhara afkqed Monte Carlo generators performed, revealing discrepancies one-photon rates angular distributions former. This disagreement has a negligible effect on e+e−→π+π−(γ)...
This article presents a model-independent search for an additional, mostly sterile, heavy neutral lepton (HNL), that is capable of mixing with the Standard Model $\ensuremath{\tau}$ neutrino strength $|{U}_{\ensuremath{\tau}4}{|}^{2}$, corresponding to absolute square extended Pontecorvo-Maki-Nakagawa-Sakata matrix element. Data from BABAR experiment, total integrated luminosity $424\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, are analyzed using kinematic approach makes no assumptions...
We study the processes ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}\ensuremath{\gamma}$, ${K}_{S}^{0}{K}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}\ensuremath{\gamma}$, and...
A new mechanism has been proposed to simultaneously explain the presence of dark matter and matter-antimatter asymmetry in universe. This scenario predicts exotic $B$ meson decays into a baryon sector anti-baryon ($\psi_D$) with branching fractions accessible at factories. We present search for $B \rightarrow \Lambda \psi_D$ using data collected by $BABAR$ experiment SLAC. reaction is identified fully reconstructing accompanying requiring single $\Lambda$ remaining particles. No significant...
A new dark sector antibaryon, denoted ψD, could be produced in decays of B mesons. This Letter presents a search for B+→ψD+p (and the charge conjugate) e+e− annihilations at 10.58 GeV, using data collected BABAR experiment. Data corresponding to an integrated luminosity 398 fb−1 are analyzed. No evidence signal is observed. Branching fraction upper limits range from 10−7–10−5 obtained 90% confidence level masses 1.0<mψD<4.3 GeV/c2. The result also reinterpreted provide first on...
A new mechanism has been proposed to simultaneously explain the presence of dark matter and matter-antimatter asymmetry in universe. This scenario predicts exotic $B$ meson decays into a baryon sector anti-baryon ($ψ_D$) with branching fractions accessible at factories. We present search for $B \rightarrow Λψ_D$ using data collected by $BABAR$ experiment SLAC. reaction is identified fully reconstructing accompanying requiring single $Λ$ remaining particles. No significant signal observed,...
Using the entire <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi mathvariant="normal">ϒ</a:mi><a:mo stretchy="false">(</a:mo><a:mn>4</a:mn><a:mi>S</a:mi><a:mo stretchy="false">)</a:mo></a:math> dataset, first two-dimensional unbinned angular analysis of semileptonic decay <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"><f:mover accent="true"><f:mi>B</f:mi><f:mo stretchy="false">¯</f:mo></f:mover><f:mo...
We present a new technique, ``tau polarimetry,'' for measuring the longitudinal beam polarization in an ${e}^{+}{e}^{\ensuremath{-}}$ collider through analysis of ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\tau}}^{+}{\ensuremath{\tau}}^{\ensuremath{-}}$ events. By exploiting sensitivity $\ensuremath{\tau}$ decay kinematics to beams, we demonstrate that can be measured with 3 per mil systematic uncertainty at interaction point using technique is independent spin and...
The DIRC (acronym for Detection of Internally Reflected Cherenkov (light)) is the ring imaging detector BABAR at PEP-II SLAC. It provides identification pions, kaons and protons momenta up to 4 GeV/c with high efficiency. This needed reconstruct CP-violating B-decay final states provide B-meson flavour tagging time dependent asymmetry measurements. radiators consists long rectangular bars made synthetic fused silica photon a water tank equipped an array 10.752 conventional photomultipliers....
The Harvard‐Purdue‐Wisconsin water Cherenkow proton‐decay detector is described. Running through early August, 1983, comprises 3.1×106 triggers at a 0.6 Hz rate, and 3.6×106 0.7 Hz. Track reconstruction demonstrated for cosmic‐ray muons. apparatus records full data as many 7 delayed occuring within 32 microseconds of the primary trigger or each other. Such have been used to calibrate on electron‐decays We discuss implications rapid recognition certain classes candidates nucleon decay,...
Using the entire BaBar $Υ(4S)$ data set, first two-dimensional unbinned angular analysis of semileptonic decay $\overline{B} \rightarrow D \ell^- \overlineν_\ell$ is performed, employing hadronic reconstruction tag-side $B$ meson from $Υ(4S)\to B\overline{B}$. Here, $\ell$ denotes light charged leptons $e$ and $μ$. A novel data-driven signal-background separation procedure with minimal dependence on simulation developed. This preserves all multi-dimensional correlations present in data. The...