T. Britton
A5052090489- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Time Series Analysis and Forecasting
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Stochastic processes and statistical mechanics
- Anomaly Detection Techniques and Applications
- Computational Physics and Python Applications
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Fault Detection and Control Systems
- Scientific Computing and Data Management
- Big Data Technologies and Applications
- Advanced NMR Techniques and Applications
- Distributed and Parallel Computing Systems
- Gaussian Processes and Bayesian Inference
- Atomic and Molecular Physics
- Gas Dynamics and Kinetic Theory
Thomas Jefferson National Accelerator Facility
2018-2024
University of North Carolina Wilmington
2020
Syracuse University
2012-2018
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
2014-2017
Centro Brasileiro de Pesquisas Físicas
2014-2017
Universidade Federal do Rio de Janeiro
2016
AGH University of Krakow
2015
University College Dublin
2014
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
2014
Max Planck Institute for Nuclear Physics
2012
Observations of exotic structures in the J/ψp channel, which we refer to as charmonium-pentaquark states, Λ0b→J/ψK−p decays are presented. The data sample corresponds an integrated luminosity 3 fb−1 acquired with LHCb detector from 7 and 8 TeV pp collisions. An amplitude analysis three-body final state reproduces two-body mass angular distributions. To obtain a satisfactory fit seen spectrum, it is necessary include two Breit-Wigner amplitudes that each describe resonant state. significance...
A measurement of the ratio branching fractions $B^{+}\rightarrow K^{+}\mu^{+}\mu^{-}$ and K^{+}e^{+}e^{-}$ decays is presented using proton-proton collision data, corresponding to an integrated luminosity 3.0 fb$^{-1}$, recorded with LHCb experiment at center-of-mass energies 7 8 $\mathrm{\,Te\kern -0.1em V}$. The value for dilepton invariant mass squared range $1<q^{2}<6\mathrm{\,Ge\kern V^2\!/}c^4$ measured be $0.745^{+0.090}_{-0.074}\mathrm{\,(stat)}\,\pm0.036\mathrm{\,(syst)}$. This most...
The branching fraction ratio R(D^{*})≡B(B[over ¯]^{0}→D^{*+}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]^{0}→D^{*+}μ^{-}ν[over ¯]_{μ}) is measured using a sample of proton-proton collision data corresponding to 3.0 fb^{-1} integrated luminosity recorded by the LHCb experiment during 2011 and 2012. tau lepton identified in decay mode τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ}. semitauonic sensitive contributions from non-standard-model particles that preferentially couple third generation fermions, particular,...
Resonant structures in B^{0}→ψ^{'}π^{-}K^{+} decays are analyzed by performing a four-dimensional fit of the decay amplitude, using pp collision data corresponding to 3 fb^{-1} collected with LHCb detector. The cannot be described K^{+}π^{-} resonances alone, which is confirmed model-independent approach. A highly significant Z(4430)^{-}→ψ^{'}π^{-} component required, thus confirming existence this state. observed evolution Z(4430)^{-} amplitude ψ^{'}π^{-} mass establishes resonant nature...
The $\Xi_c^+ K^-$ mass spectrum is studied with a sample of $pp$ collision data corresponding to an integrated luminosity 3.3 fb$^{-1}$, collected by the LHCb experiment. $\Xi_c^+$ reconstructed in decay mode $p K^- \pi^+$. Five new, narrow excited $\Omega_c^0$ states are observed: $\Omega_c(3000)^0$, $\Omega_c(3050)^0$, $\Omega_c(3066)^0$, $\Omega_c(3090)^0$, and $\Omega_c(3119)^0$. Measurements their masses widths reported.
A bstract search for $$ {B}_s^0\to {\overline{D}}^0{f}_0(980) <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo>→</mml:mo><mml:msup><mml:mover><mml:mi>D</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mn>0</mml:mn></mml:msup><mml:msub><mml:mi>f</mml:mi><mml:mn>0</mml:mn></mml:msub><mml:mfenced><mml:mn>980</mml:mn></mml:mfenced></mml:math> decays is performed using 3 . 0 fb 1− of pp collision data...
An angular analysis and a measurement of the differential branching fraction decay B 0 → ϕμ + μ − are presented, using data corresponding to an integrated luminosity 3.0 fb−1 pp collisions recorded by LHCb experiment at $$ \sqrt{s}=7 8 TeV. Measurements reported as function q 2, square dimuon invariant mass results found be consistent with Standard Model. In range 1 < 2 6 GeV2 /c 4, where precise theoretical calculations available, is more than 3σ below Model predictions.
The isospin asymmetries of $B \to K\mu^+\mu^-$ and K^{*}\mu^+\mu^-$ decays the partial branching fractions $B^0 K^0\mu^+\mu^-$, $B^+ K^+\mu^+\mu^-$ K^{*+}\mu^+\mu^-$ are measured as functions dimuon mass squared, $q^2$. data used correspond to an integrated luminosity 3$~$fb$^{-1}$ from proton-proton collisions collected with LHCb detector at centre-of-mass energies 7$\,$TeV 8$\,$TeV in 2011 2012, respectively. both consistent Standard Model expectations. three fractions, while individually...
The first full amplitude analysis of $B^+\to J/ψϕK^+$ with $J/ψ\toμ^+μ^-$, $ϕ\to K^+K^-$ decays is performed a data sample 3 fb$^{-1}$ $pp$ collision collected at $\sqrt{s}=7$ and $8$ TeV the LHCb detector. cannot be described by model that contains only excited kaon states decaying into $ϕK^+$, four $J/ψϕ$ structures are observed, each significance over $5$ standard deviations. quantum numbers these determined least $4$ lightest has mass consistent with, but width much larger than, previous...
We report on the measurement of γp→J/ψp cross section from E_{γ}=11.8 GeV down to threshold at 8.2 using a tagged photon beam with GlueX experiment. find that total falls toward less steeply than expected two-gluon exchange models. The differential dσ/dt has an exponential slope 1.67±0.39 GeV^{-2} 10.7 average energy. LHCb pentaquark candidates P_{c}^{+} can be produced in s channel this reaction. see no evidence for them and set model-dependent upper limits their branching fractions...
Evidence for the decay mode $X(3872)\rightarrow\psi(2S)\gamma$ in $B^+\rightarrow X(3872)K^+$ decays is found with a significance of 4.4 standard deviations. The analysis based on data sample proton-proton collisions, corresponding to an integrated luminosity 3fb$^{-1}$ collected LHCb detector, at centre-of-mass energies 7 and 8TeV. ratio branching fraction $X(3872)\to\psi(2S)\gamma$ that $X(3872)\rightarrow J/\psi \gamma$ measured be $$...
A full amplitude analysis of $\Lambda_b^0 \to J/\psi p \pi^-$ decays is performed with a data sample acquired the LHCb detector from 7 and 8 TeV $pp$ collisions, corresponding to an integrated luminosity 3 fb$^{-1}$. significantly better description achieved when, in addition previously observed nucleon excitations $N\to p\pi^-$, either $P_c(4380)^+$ $P_c(4450)^+\to p$ states, K^-$ decays, or $Z_c(4200)^-\to state, reported $B^0 K^+ all three, are included models. The support model...
A search is presented for hidden-sector bosons, $\ensuremath{\chi}$, produced in the decay ${B}^{0}\ensuremath{\rightarrow}{K}^{*}(892{)}^{0}\ensuremath{\chi}$, with ${K}^{*}(892{)}^{0}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and $\ensuremath{\chi}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$. The performed using $pp$-collision data corresponding to $3.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected LHCb detector. No...
A bstract The differential branching fraction of the rare decay Λ b 0 → Λμ + μ − is measured as a function q 2 , square dimuon invariant mass. analysis performed using proton-proton collision data, corresponding to an integrated luminosity 3 . fb −1 collected by LHCb experiment. Evidence signal observed in region below J/ψ Integrating over 15 < 20 GeV /c 4 $$ \mathrm{d}\mathrm{\mathcal{B}}\left({\varLambda}_b^0\to \varLambda {\mu}^{+}{\mu}^{-}\right)/d{q}^2=\left({1.18}_{-0.08}^{+0.09}\pm...
The production of J/ψ mesons with rapidity 1.5 < y 4.0 or −5.0 −2.5 and transverse momentum p T 14 GeV/c is studied the LHCb detector in proton-lead collisions at a nucleon-nucleon centre-of-mass energy $ \sqrt{{{s_{NN }}}} = 5TeV. are reconstructed using dimuon decay mode. analysis based on data sample corresponding to an integrated luminosity about 1.6 nb−1. For first time nuclear modification factor forward-backward ratio determined separately for prompt from b-hadron decays. Clear...
The time-dependent $CP$ asymmetry in ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{+}{K}^{\ensuremath{-}}$ decays is measured using $pp$ collision data, corresponding to an integrated luminosity of $3.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, collected with the LHCb detector at center-of-mass energies 7 and 8 TeV. In a sample 96 000 decays, $CP$-violating phase ${\ensuremath{\phi}}_{s}$ measured, as well decay widths ${\mathrm{\ensuremath{\Gamma}}}_{\mathrm{L}}$...
The first full amplitude analysis of $B^+\to J/ψϕK^+$ with $J/ψ\toμ^+μ^-$, $ϕ\to K^+K^-$ decays is performed a data sample 3 fb$^{-1}$ $pp$ collision collected at $\sqrt{s}=7$ and $8$ TeV the LHCb detector. cannot be described by model that contains only excited kaon states decaying into $ϕK^+$, four $J/ψϕ$ structures are observed, each significance over $5$ standard deviations. quantum numbers these determined least $4$ lightest has mass consistent with, but width much larger than, previous...
A search for heavy Majorana neutrinos produced in the ${B}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}{\ensuremath{\mu}}^{\ensuremath{-}}$ decay mode is performed using $3\text{ }\text{ }{\text{fb}}^{\ensuremath{-}1}$ of integrated luminosity collected with LHCb detector $pp$ collisions at center-of-mass energies 7 and 8 TeV LHC. Neutrinos masses range 250 to 5000 MeV lifetimes from zero 1000 ps are probed. In absence a signal, upper...
Measurements are presented of electroweak boson production using data from $pp$ collisions at a centre-of-mass energy $\sqrt{s} = 8\mathrm{\,Te\kern -0.1em V}$. The analysis is based on an integrated luminosity $2.0\mathrm{\,fb}^{-1}$ recorded with the LHCb detector. bosons identified in $W\rightarrow\mu\nu$ and $Z\rightarrow\mu^{+}\mu^{-}$ decay channels. cross-sections measured for muons pseudorapidity range $2.0 < \eta 4.5$, transverse momenta $p_{\rm T} > 20{\mathrm{\,Ge\kern V\!/}c}$...
The resonant substructure of B0s→¯D0K−π+ decays is studied with the Dalitz plot analysis technique. study based on a data sample corresponding to an integrated luminosity 3.0 fb−1 pp collision recorded by LHCb. A structure at m(¯D0K−)≈2.86 GeV/c2 found be admixture spin-1 and spin-3 resonances. masses widths these states D∗s2(2573)− meson are measured, as complex amplitudes fit fractions for all ¯D0K− K−π+ components included in amplitude model. In addition, resonance confirmed spin 2.8...
The resonant substructures of ${B}^{0}\ensuremath{\rightarrow}{\overline{D}}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity $3.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ $pp$ collisions collected by LHCb detector is used. branching fraction decay in region $m({\overline{D}}^{0}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}})>2.1\text{...
The charmless three-body decay modes ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}^{\ifmmode\pm\else\textpm\fi{}}{K}^{+}{K}^{\ensuremath{-}}$, ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}{K}^{+}{K}^{\ensuremath{-}}$ and...
Structure of the decay ${\overline{B}}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ is studied using data corresponding to $3\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity from $pp$ collisions produced by LHC and collected LHCb detector. Five interfering ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ states are required describe decay: ${f}_{0}(980),{f}_{0}(1500),{f}_{0}(1790),{f}_{2}(1270)$,...
Time-integrated CP asymmetries in D 0 decays to the final states K − + and π are measured using proton-proton collisions corresponding 3fb−1 of integrated luminosity collected at centre-of-mass energies 7 TeV 8 TeV. The mesons produced semileptonic b-hadron decays, where charge accompanying muon is used determine initial flavour charm meson. difference between two be $$ \varDelta...
The differential cross-section as a function of rapidity has been measured for the exclusive production J/ψ and ψ(2S) mesons in proton–proton collisions at TeV, using data collected by LHCb experiment, corresponding to an integrated luminosity 930 pb−1. cross-sections times branching fractions two muons having pseudorapidities between 2.0 4.5 are be