M. Charles
A5009571742- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Stochastic processes and statistical mechanics
- Mathematics, Computing, and Information Processing
- Simulation Techniques and Applications
- International Science and Diplomacy
- Particle accelerators and beam dynamics
- Cosmology and Gravitation Theories
- Advanced NMR Techniques and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Electron and X-Ray Spectroscopy Techniques
- Algorithms and Data Compression
Délégation Paris 7
2018-2025
Sorbonne Paris Cité
2018-2025
Laboratoire de Physique Nucléaire et de Hautes Énergies
2016-2025
Université Paris Cité
2016-2025
Sorbonne Université
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Université Grenoble Alpes
2022
CEA LETI
2022
CEA Grenoble
2022
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2022
This work is on the Physics of B Factories. Part A this book contains a brief description SLAC and KEK Factories as well their detectors, BaBar Belle, data taking related issues. discusses tools methods used by experiments in order to obtain results. The results themselves can be found C. Please note that version 3 archive auxiliary book. uses notation alpha, beta, gamma for angles Unitarity Triangle. nominal phi_1, phi_2 phi_3. cite Eur. Phys. J. C74 (2014) 3026.
The quantum numbers of the X(3872) meson are determined to be JPC = 1++ based on angular correlations in B+ K+ decays, where pi+pi- J/psi and \mu+\mu-. data correspond 1.0 fb-1 pp collisions collected by LHCb detector. only alternative assignment allowed previous measurements, JPC=2-+, is rejected with a confidence level equivalent more than eight Gaussian standard deviations using likelihood-ratio test full phase space. This result favors exotic explanations state.
The production of J/psi mesons in proton-proton collisions at sqrt(s)=7 TeV is studied with the LHCb detector LHC. differential cross-section for prompt measured as a function transverse momentum pT and rapidity y fiducial region 0<pT<14 GeV/c 2.0<y<4.5. fraction from b-hadron decays are also same ranges. analysis based on data sample corresponding to an integrated luminosity 5.2pb-1. cross-sections over 10.52 +/- 0.04 1.40 +1.64/-2.20 mub 1.14 0.01 0.16 decays, where first uncertainty...
Charm production at the LHC in pp collisions s=7TeV is studied with LHCb detector. The decays D0→K−π+, D+→K−π+π+, D⁎+→D0(K−π+)π+, Ds+→ϕ(K−K+)π+, Λc+→pK−π+, and their charge conjugates are analysed a data set corresponding to an integrated luminosity of 15 nb−1. Differential cross-sections dσ/dpT measured for prompt five charmed hadron species bins transverse momentum rapidity region 0<pT<8GeV/c 2.0<y<4.5. Theoretical predictions compared differential cross-sections. charm hadrons computed...
Abstract Using 34.7 pb −1 of data collected with the LHCb detector, inclusive production X (3872) meson in pp collisions at $\sqrt{s}=7\mbox{~TeV}$ is observed for first time. Candidates are selected (3872)→ J / ψπ + π − decay mode, and used to measure "Equation missing" where σ ( → (3872)+anything) cross section mesons rapidity range 2.5–4.5 transverse momentum 5–20 GeV/ c . In addition masses both ψ (2 S ) mesons, reconstructed final state, measured be $$m_{X(3872)} = 3871.95 \pm0.48 \...
The production of $J/\psi$ pairs in proton-proton collisions at a centre-of-mass energy 7 TeV has been observed using an integrated luminosity $37.5 pb^{-1}$ collected with the LHCb detector. cross-section for both \jpsi rapidity range $2<y^{J/\psi}<4.5$ and transverse momentum $p_{T}^{J/\psi}<10 GeV/c$ is $$ \sigma^{J/\psi J/\psi} = 5.1\pm1.0\pm1.1 nb,$$ where first uncertainty statistical second systematic.
The time-dependent $CP$ asymmetry in ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{+}{K}^{\ensuremath{-}}$ decays is measured using $pp$ collision data at $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$, corresponding to an integrated luminosity of $1.0\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, collected with the LHCb detector. decay-time distribution characterized by decay widths ${\ensuremath{\Gamma}}_{\mathrm{L}}$ and ${\ensuremath{\Gamma}}_{\mathrm{H}}$ light heavy mass eigenstates...
We present a measurement of the time-dependent $CP$-violating asymmetry in ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}$ decays, using data collected with LHCb detector at LHC. The decay time distribution is characterized by widths ${\ensuremath{\Gamma}}_{H}$ and ${\ensuremath{\Gamma}}_{L}$ heavy light mass eigenstates, respectively, ${B}_{s}^{0}\ensuremath{-}{\overline{B}}_{s}^{0}$ system phase ${\ensuremath{\phi}}_{s}$. In sample about 8500 events isolated from...
Using pp collision data corresponding to 1.0 fb(-1) integrated luminosity collected by the LHCb detector, two narrow states are observed in Λ(b)(0)π(+)π(-) spectrum with masses 5911.97±0.12(stat)±0.02(syst)±0.66(Λ(b)(0) mass) MeV/c(2) and 5919.77±0.08(stat)±0.02(syst)±0.66(Λ(b)(0) MeV/c(2). The significances of observations 5.2 10.2 standard deviations, respectively. These interpreted as orbitally excited Λ(b)(0) baryons, Λ(b)(*0)(5912) Λ(b)(*0)(5920).
The production of $J/\psi$ mesons accompanied by open charm, and pairs charm hadrons are observed in pp collisions at a centre-of-mass energy 7 TeV using an integrated luminosity $355pb^{-1}$ collected with the LHCb detector. Model independent measurements absolute cross-sections given together ratios to measured cross-sections. properties these events studied compared theoretical predictions.
The production of Upsilon(1S), Upsilon(2S) and Upsilon(3S) mesons in proton-proton collisions at the centre-of-mass energy sqrt(s)=7 TeV is studied with LHCb detector. analysis based on a data sample 25 pb-1 collected Large Hadron Collider. Upsilon are reconstructed decay mode -> mu+ mu- signal yields extracted from fit to invariant mass distributions. differential cross-sections times dimuon branching fractions measured as function transverse momentum pT rapidity y, over range < 15 GeV/c...
Bottom baryons decaying to a J/ψ meson and hyperon are reconstructed using 1.0 fb(-1) of data collected in 2011 with the LHCb detector. Significant Λ(b)(0) → J/ψΛ, Ξ(b((-) J/ψΞ(-) Ω(b)(-) J/ψΩ(-) signals observed corresponding masses measured be M(Λ(b)(0))=5619.53 ± 0.13(stat.) 0.45(syst.) MeV/c(2), M(Ξ(b)(-)) = 5795.8 0.9(stat.) 0.4(syst.) M(Ω(b)(-)) 6046.0 2.2(stat.) 0.5(syst.) MeV/c(2) , while differences respect mass M(Ξ(b)(-))-M(Λ(b)(0))=176.2 0.1(syst.) M(Ω(b)(-))-M(Λ(b)(0))=426.4...
The decay ${\overline{B}}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ can be exploited to study $CP$ violation. A detailed understanding of its structure is imperative in order optimize usefulness. An analysis this three-body final state performed using a $1.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ sample data produced 7 TeV $pp$ collisions at the LHC and collected by LHCb experiment. modified Dalitz plot both...
The differential cross-section for the inclusive production of ψ(2S) mesons in pp collisions at $\sqrt{s}=7\ \mbox{TeV}$ has been measured with LHCb detector. data sample corresponds to an integrated luminosity 36 pb−1. are reconstructed decay channels ψ(2S)→μ + μ − and ψ(2S)→J/ψπ π −, J/ψ meson decaying into two muons. Results presented both promptly produced those originating from b-hadron decays. In kinematic range p T(ψ(2S))≤16 GeV/c 2<y(ψ(2S))≤4.5 we measure where last uncertainty on...
A bstract Measurements of inclusive W and Z boson production cross-sections in pp collisions at $ \sqrt {s} = 7\,{\text{TeV}} using final states containing muons are presented. The data sample corresponds to an integrated luminosity 37 pb −1 collected with the LHCb detector. bosons reconstructed from a transverse momentum above 20 GeV/c pseudorapidity between 2 . 0 4 5, and, case cross-section, dimuon invariant mass 60 120 measured be 831 ± 9 27 29pb for + , 656 8 19 23 − 76 7 1 3 7pb where...
Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, hadronic decay Bs -> J/psi f0(980) is observed. This CP eigenstate mode could be used to measure mixing-induced violation B_s system. fit pi+ pi- mass spectrum interfering resonances gives R_{f0/phi} = [Gamma(Bs f0, f0 pi-)]/[Gamma(Bs phi, phi K+K-)] 0.252^{+0.046+0.027}_{-0.032-0.033}, where uncertainties are statistical and systematic, respectively.
Exclusive J/ψ and ψ(2S) vector meson production has been observed in the dimuon channel using LHCb detector. The cross-section times branching fractions to two muons with pseudorapidities between 2.0 4.5 are measured be
The interference between the K+ K- S-wave and P-wave amplitudes in B(s)(0) → J/ψK+ decays with pairs region around ϕ(1020) resonance is used to determine variation of difference strong phase these as a function invariant mass. Combined results from our CP asymmetry measurement J/ψϕ decays, we conclude that mass eigenstate almost = +1 lighter faster than -1. This determines sign decay width ΔΓ(s) ≡ Γ(L) - Γ(H) be positive. Our result also resolves ambiguity past measurements violating ϕ(s)...
Measurements of ${B}_{c}^{+}$ production and mass are performed with the decay mode ${B}_{c}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}$ using $0.37\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data collected in $pp$ collisions at $\sqrt{s}=7\text{ }\mathrm{TeV}$ by LHCb experiment. The ratio cross section times branching fraction between ${B}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{+}$ decays is measured to be...
A search for the $X(4140)$ state in ${B}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}{K}^{+}$ decays is performed with $0.37\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of $pp$ collisions at $\sqrt{s}=7\text{ }\mathrm{TeV}$ collected by LHCb experiment. No evidence this found, $2.4\ensuremath{\sigma}$ disagreement a measurement CDF. An upper limit on its production rate set,...
An analysis of B±→DK± and B±→Dπ± decays is presented where the D meson reconstructed in two-body final states: K±π∓, K+K− π+π−. Using 1.0 fb−1 s=7TeV pp collisions, measurements several observables are made including first observation suppressed mode B±→[π±K∓]DK±. CP violation observed with 5.8σ significance.
The asymmetry in the production cross-section \sigma of D+/- mesons, A_P = (\sigma(D+) - \sigma(D-))/(\sigma(D+) + \sigma(D-)), is measured bins pseudorapidity \eta and transverse momentum p_T within acceptance LHCb detector. result obtained with a sample D+ -> K_S pi+ decays corresponding to an integrated luminosity 1.0 fb^-1, collected pp collisions at centre mass energy 7 TeV Large Hadron Collider. When over kinematic range 2.0 < 18.0 GeV/c 2.20 4.75, (-0.96+/-0.26+/-0.18)%. uncertainties...