A5107847263- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Stochastic processes and statistical mechanics
- Distributed and Parallel Computing Systems
- Radiation Detection and Scintillator Technologies
- Advanced NMR Techniques and Applications
- International Science and Diplomacy
- Cosmology and Gravitation Theories
- advanced mathematical theories
- Particle accelerators and beam dynamics
- Advanced Data Storage Technologies
- Stochastic processes and financial applications
- Markov Chains and Monte Carlo Methods
- Astrophysics and Cosmic Phenomena
Université Paris-Saclay
2016-2025
Institut National de Physique Nucléaire et de Physique des Particules
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2020-2025
European Organization for Nuclear Research
2010-2025
Universitat Ramon Llull
2023
Université Paris-Sud
2011-2020
GANIL
2005-2020
Université Clermont Auvergne
2019
Centro Brasileiro de Pesquisas Físicas
2013-2018
We have observed a narrow state near 2.32 GeV/c2 in the inclusive D+sπ0 invariant mass distribution from e+e− annihilation data at energies 10.6 GeV. The width is consistent with experimental resolution. small intrinsic and quantum numbers of final indicate that decay violates isospin conservation. has natural spin-parity low suggests JP=0+ assignment. sample corresponds to an integrated luminosity 91 fb−1 recorded by BABAR detector SLAC PEP-II asymmetric-energy storage ring.Received 11...
We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at PEP-II asymmetric Factory SLAC. This result uses additional sample Upsilon(4S) collected 2001, bringing data available to 32 x 10(6) BB macro pairs. select events which one meson is fully reconstructed a final state containing charmonium and flavor other determined from its decay products. The amplitude asymmetry, standard model proportional sin2 beta, derived time...
This paper presents the design of LHCb trigger and its performance on data taken at LHC in 2011. A principal goal is to perform flavour physics measurements, designed distinguish charm beauty decays from light quark background. Using a combination lepton identification measurements particles' transverse momenta selects particles originating hadrons, which typically fly finite distance before decaying. The reduces roughly 11 MHz bunch-bunch crossings that contain least one inelastic pp...
We present results on time-dependent CP asymmetries in neutral B decays to several eigenstates. The measurements use a data sample of about 88 x 10(6) Upsilon(4S)-->B(-)B collected between 1999 and 2002 with the BABAR detector at PEP-II asymmetric-energy factory SLAC. study events which one meson is fully reconstructed final state containing charmonium other determined be either B(0) or B(-0) from its decay products. amplitude asymmetry, standard model proportional sin2beta, derived...
The BaBar detector operated successfully at the PEP-II asymmetric e+e− collider SLAC National Accelerator Laboratory from 1999 to 2008. This report covers upgrades, operation, and performance of systems, as well trigger, online offline computing, aspects event reconstruction since beginning data taking.
We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample 23x10(6) Upsilon(4S)-->BbarB collected by the BABAR detector at PEP-II asymmetric Factory SLAC. In this sample, we find events which one meson is fully reconstructed eigenstate containing charmonium and flavor other determined from its decay products. amplitude asymmetry, standard model proportional sin2beta, derived time distributions such...
We present a measurement of time-dependent CP-violating asymmetries in neutral B meson decays collected with the BABAR detector at PEP-II asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider Stanford Linear Accelerator Center. The data sample consists 29.7 ${\mathrm{fb}}^{\mathrm{\ensuremath{-}}1}$ recorded $\ensuremath{\Upsilon}(4S)$ resonance and 3.9 off resonance. One mesons, which are produced pairs $\ensuremath{\Upsilon}(4S),$ is fully reconstructed CP decay modes...
With a sample of approximately 89 x 10(6) B(-)B pairs collected with the BABAR detector, we perform search for B meson decays into charmless vector mesons (phi, rho, and K*). We measure branching fractions, determine degree longitudinal polarization, CP violation asymmetries in processes B+-->phiK(*+), B0-->phiK(*0), B+-->rho(0)K(*+), B+-->rho(0)rho(+). also set an upper limit on fraction decay B0-->rho(0)rho(0).
We present measurements of branching fractions and CP-violating asymmetries for two-body neutral B meson decays to charged pions kaons based on a sample about 88x10(6) Upsilon(4S)-->BB decays. From time-independent fit we measure the charge-averaged B(B0-->pi+pi-)=(4.7+/-0.6+/-0.2)x10(-6), B(B0-->K+pi-)=(17.9+/-0.9+/-0.7)x10(-6), direct charge asymmetry A(Kpi)=-0.102+/-0.050+/-0.016 [-0.188,-0.016], where ranges in square brackets indicate 90% confidence intervals. time-dependent B0-->pi+pi-...
A narrow state, which we label DsJ(2458)+, with a mass 2458.0±1.0(stat)±1.0(syst)MeV/c2, is observed in the inclusive D+sπ0γ distribution 91fb−1 of e+e− annihilation data recorded by BABAR detector at SLAC PEP-II asymmetric-energy storage ring. The width consistent experimental resolution. favor decay through D*s(2112)+π0 rather than D*sJ(2317)+γ. An analysis D+sπ0 accounting for influence DsJ(2458)+ produces D*sJ(2317)+ 2317.3±0.4(stat)±0.8(syst)MeV/c2. Received 24 October...
A setup of two bent crystals and a fixed target in the CERN Large Hadron Collider (LHC) could enable study magnetic (MDM) electric (EDM) dipole moments short-lived charm baryons with unprecedented accuracy. At core experiment is crystal which particles interest, such as $\Lambda_c^+$ $\Xi_c^+$ particles, can be confined between crystalline planes, inducing deflection that enforces spin precession measurable by detectors. The requires inside LHC vacuum to create charmed baryons. first serves...
The mass m(eta(c)) and total width Gamma(eta(c))(tot) of the eta(c) meson have been measured in two-photon interactions at SLAC e(+)e(-) asymmetric B Factory with BABAR detector. With a sample approximately 2500 reconstructed eta(c)-->K(0)(S)K+/-pi(-/+) decays 88 fb(-1) data, results are m(eta(c))=2982.5+/-1.1(stat)+/-0.9(syst) MeV/c(2) Gamma(eta(c))(tot)=34.3+/-2.3(stat)+/-0.9(syst) MeV/c(2). Using same decay mode, second resonance 112+/-24 events is observed 3630.8+/-3.4(stat)+/-1.0(syst)...
The inclusive production of charmonium mesons in B meson decay has been studied a 20.3 ${\mathrm{fb}}^{\mathrm{\ensuremath{-}}1}$ data set collected by the BABAR experiment operating at $\ensuremath{\Upsilon}(4S)$ resonance. Branching fractions have measured for $J/\ensuremath{\psi},$ $\ensuremath{\psi}(2S),$ ${\ensuremath{\chi}}_{c1},$ and ${\ensuremath{\chi}}_{c2}.$ branching are also presented as function center-of-mass momentum helicity $J/\ensuremath{\psi}.$
We present evidence for the flavor-changing neutral current decay B-->K*l+l- and a measurement of branching fraction related process B-->K l+l-, where l+l- is either an epsilon+epsilon- or mu+mu- pair. These decays are highly suppressed in standard model, they sensitive to contributions from new particles intermediate state. The data sample comprises 123 x 10(6) Upsilon(4S)-->B(-)B collected with BABAR detector at SLAC PEP-II storage ring. Averaging over K(*) isospin lepton flavor, we obtain...
The production of $J/\ensuremath{\psi}$ mesons in continuum ${e}^{+}{e}^{\ensuremath{-}}$ annihilations has been studied with the BABAR detector at energies near $\ensuremath{\Upsilon}(4S)$ resonance. are distinguished from $B$ decays through their center-of-mass momentum and energy. We measure cross section ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}X$ to be $2.52\ifmmode\pm\else\textpm\fi{}0.21\ifmmode\pm\else\textpm\fi{}0.21\mathrm{pb}$. set a $90%$ C.L. upper...
We report branching fraction measurements for exclusive decays of charged and neutral B mesons into two-body final states containing a charmonium meson. use sample $22.72\ifmmode\pm\else\textpm\fi{}0.36$ million $B\overline{B}$ events collected between October 1999 2000 with the BABAR detector at PEP-II storage rings Stanford Linear Accelerator Center. The considered here are $J/\ensuremath{\psi},$ $\ensuremath{\psi}(2S),$ ${\ensuremath{\chi}}_{c1},$ light meson in decay is either K,...
We present a measurement of the decay amplitudes in B-->J/psiK*(892) channels using 20.7 fb(-1) data collected at Upsilon(4S) resonance with BABAR detector PEP-II. measure P-wave fraction R(perpendicular) = (16.0 +/- 3.2 1.4)% and longitudinal polarization (59.7 2.8 2.4)%. The relative phase that is neither 0 nor pi, phi 2.50 0.20 +/-0.08 radians, favors departure from factorization hypothesis. Although B-->/psiK(pi) proceeds mainly via K*(892), there also evidence for K2*(1430) K(pi) S-wave...