A5058451339- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Laser-Plasma Interactions and Diagnostics
- Gyrotron and Vacuum Electronics Research
- Laser-Matter Interactions and Applications
- Laser Design and Applications
- Atomic and Subatomic Physics Research
- Electron and X-Ray Spectroscopy Techniques
- Laser-induced spectroscopy and plasma
- Advanced X-ray Imaging Techniques
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Electronic Packaging and Soldering Technologies
- Experimental Learning in Engineering
- Advanced Fiber Laser Technologies
- Black Holes and Theoretical Physics
- Engineering Education and Pedagogy
Brookhaven National Laboratory
2016-2025
RIKEN BNL Research Center
2018-2024
Brookhaven College
2021-2024
Queen's University Belfast
2024
Accelerator Test Facility
2024
Stony Brook University
2023
Medtronic (Ireland)
2023
Minnesota Oncology
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2021
University of Trieste
2021
Using the CLEO II detector, we have measured differential cross sections for exclusive two-photon production of light pseudoscalar mesons ${\ensuremath{\pi}}^{0},$ \ensuremath{\eta}, and ${\ensuremath{\eta}}^{\ensuremath{'}}.$ From our measurements obtained form factors associated with electromagnetic transitions ${\ensuremath{\gamma}}^{*}\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\gamma}}\mathrm{meson}.$ We these in momentum transfer ranges from 1.5 to 9, 20, $30{\mathrm{GeV}}^{2}$...
We have measured the branching fraction and photon energy spectrum for radiative penguin process b-->s gamma. find Beta(b-->s gamma) = (3.21+/-0.43+/-0.27(+0.18)(-0.10))x10(-4), where errors are statistical, systematic, from theory corrections. obtain first second moments of above 2.0 GeV, <E( gamma)> 2.346+/-0.032+/-0.011 <E(2)(gamma)>-<E(gamma)>(2) 0.0226+/-0.0066+/-0.0020 GeV(2), statistical systematic. From moment, we (in modified minimal subtraction renormalization scheme, to order...
A muon collider represents the ideal machine to reach very high center-of-mass energies and luminosities by colliding elementary particles. This is result of low level beamstrahlung synchrotron radiation compared linear or circular electron-positron colliders. In contrast with other lepton machines, design a detector for multi-TeV requires detailed knowledge interaction region due significant backgrounds created beam decays in ring. The physics can be properly evaluated only when performance...
We report generation of 5 TW peak power in a 2 ps pulse at 9.2 µm via chirped-pulse amplification (CPA) mixed-isotope high-pressure CO laser amplifiers. This represents the highest single picosecond format and shortest terawatt ever achieved long-wave infrared (LWIR) spectral range. Maximum demonstrated energy compressed is 14 J minimum period between shots 20 s. The successful implementation chirped technique short-pulse gas opens route to development LWIR facilities with tens terawatts...
We use data collected with the CLEO II detector to perform a high-statistics measurement of resonant substructure in ${D}^{0}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}$ decays. find that Dalitz plot is well represented by combination seven quasi-two-body decay channels...
Based on a sample corresponding to 4.3 million produced tau-pair events, we have studied hadronic dynamics in the decay tau- --> nu_tau pi- pi0 data recorded by CLEO II detector operating at CESR e+e- collider. The is dominated process tau a_1(1260), with a_1 meson decaying three pions predominantly via lowest dimensional (mainly S-wave) rho pi Born amplitude. From fits Dalitz plot and angular observables, find significant additional contributions from amplitudes for sigma pi, f_0(1370)...
Using 13.7 fb(-1) of data recorded by the CLEO detector at Cornell Electron Storage Ring, we investigate spectrum charmed baryons which decay into Lambda+(c)pi(-)pi(+) and are more massive than Lambda+(c)(2625) baryon. We find evidence for two new states: one is broad has an invariant mass roughly 480 MeV above that Lambda+(c) baryon; other narrow with 596+/-1+/-2 mass.
CLEO has studied B decays to πℓν, ρℓν, and ωℓν, where ℓ=eorμ, by incorporating the missing momentum into full reconstruction. With B0 B+ modes combined according isospin predictions for relative partial widths, we obtain B(B0→π−ℓ+ν)=(1.8±0.4±0.3±0.2)×10−4 B(B0→ρ−ℓ+ν)=(2.5±0.4+0.5−0.7±0.5)×10−4, errors are statistical, systematic, estimated model dependence. We also estimate |Vub|=(3.3±0.2+0.3−0.4±0.7)×10−3.Received 1 July 1996DOI:https://doi.org/10.1103/PhysRevLett.77.5000©1996 American...
We have searched for two-body charmless hadronic decays of B mesons. Final states include \ensuremath{\pi}\ensuremath{\pi}, K\ensuremath{\pi}, and KK with both charged neutral kaons pions: \ensuremath{\pi}\ensuremath{\rho}, K\ensuremath{\rho}, ${\mathit{K}}^{\mathrm{*}}$\ensuremath{\pi}; K\ensuremath{\varphi}, ${\mathit{K}}^{\mathrm{*}}$\ensuremath{\varphi}, \ensuremath{\varphi}\ensuremath{\varphi}. The data used in this analysis consist 2.6\ifmmode\times\else\texttimes\fi{}${10}^{6}$...
We study the exclusive semileptonic B meson decays ${\mathit{B}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}${\mathit{D}}^{\mathrm{*}0}$${\mathit{l}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\nu}\ifmmode\bar\else\textasciimacron\fi{} and B${\mathrm{\ifmmode\bar\else\textasciimacron\fi{}}}^{0}$\ensuremath{\rightarrow}${\mathit{D}}^{\mathrm{*}+}$${\mathit{l}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\nu}\ifmmode\bar\else\textasciimacron\fi{} using data collected with CLEO II detector at...
We describe the magnet challenges for a Muon Collider, an exciting option considered future of particle physics at energy frontier. Starting from comprehensive work performed by US Accelerator Program, we have reviewed performance specifications dictated beam and operating conditions to satisfy accelerator needs. Among many magnets that make up muon collider, identified four systems represent well envelope challenges: target capture solenoid, final cooling dipoles collider dipoles. These...
Abstract Cervical auscultation, commonly used by speech-language pathologists in some countries as an adjuvant to the clinical feeding evaluation, requires data on acoustic and perceptual profiles of swallowing sounds. Whilst these exists adults children, none currently exist for preterm neonates. Our study aims establish parameters sounds Swallowing were recorded a digital microphone during oral observations. Acoustic duration, peak frequency, power intensity determined. Perceptual heard...
Magnetism in two-dimensional (2D) van der Waals (vdW) crystals offers promising new directions for low-dimensional physics and devices. In this work, mega-electron volt (MeV) ultrafast electron diffraction was employed to investigate the atomic dynamics of a novel, 2D vdW magnetic single-crystal CrSBr. Femtosecond (fs) optical pump pulses excited non-equilibrium displacements shown be coherent acoustic phonons (CAPs). Phonon frequencies were extracted by analyzing oscillations different...
We have studied the "wrong-sign" process D0-->K+pi(-) to search for D0-&Dmacr;( 0) mixing. The data come from 9.0 fb(-1) of e(+)e(-) collisions at sqrt[s] approximately 10 GeV recorded with CLEO II. V detector. measure relative rate wrong-sign Cabibbo-favored &Dmacr;( 0)-->K+pi(-) be R = (0.332(+0.063)(-0.065)+/-0.040)%. study as a function decay time distinguish direct doubly Cabibbo-suppressed amplitudes that describe mixing, x(') and y('), are consistent zero. At 95% C.L. without...
We have used the CLEO II detector and $2.06{\mathrm{fb}}^{\ensuremath{-}1}$ of $\ensuremath{\Upsilon}(4S)$ data to measure $B$-meson semileptonic branching fraction. The $B\ensuremath{\rightarrow}\mathrm{Xe}\ensuremath{\nu}$ momentum spectrum was obtained over nearly full range by using charge kinematic correlations in events with a high-momentum lepton tag an additional electron. find...
In a sample of $6.6\ifmmode\times\else\texttimes\fi{}{10}^{6}$ produced $B$ mesons we have observed decays $B\ensuremath{\rightarrow}{\ensuremath{\eta}}^{\ensuremath{'}}K$, with branching fractions $B({B}^{+}\ensuremath{\rightarrow}{\ensuremath{\eta}}^{\ensuremath{'}}{K}^{+})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}({6.5}_{\ensuremath{-}1.4}^{+1.5}\ifmmode\pm\else\textpm\fi{}0.9)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$ and...
The potential of muon beams for high energy physics applications is described along with the challenges producing quality beams. Two proposed approaches delivering intensity beams, a proton driver source and positron source, are compared. concepts based on studies from Muon Accelerator Program (MAP). MAP effort focused path to deliver muon-based facilities, ranging neutrino factories colliders, that could span research needs at both frontiers. Low EMittance (LEMMA) concept, which uses...
We have measured the first and second moments of hadronic mass-squared distribution in B-->X(c)l nu, for P(lepton)>1.5 GeV/c. find <M(2)(X)-M macro(2)(D)> = 0.251+/-0.066 GeV(2), <(M(2)(X)-<M(2)(X)>)(2)> 0.576+/-0.170 GeV(4), where M macro(D) is spin-averaged D meson mass. From that moment photon energy spectrum b-->s gamma, we heavy quark effective theory parameter lambda(1) (in modified minimal subtraction renormalization scheme, to order 1/M(3)(B) beta(0)alpha(2)(s)) be -0.24+/-0.11...
We report a new measurement of the CKM parameter V_ub made with sample 9.7 million B B-bar events collected CLEO II detector. Using Heavy Quark theory, we combine observed yield leptons from semileptonic decay in end-point momentum interval 2.2-2.6 GeV/c recent data on --> X_s gamma to find |V_ub| = (4.08 +/- 0.34 0.44 0.16 0.24) x 10^-3, where first two uncertainties are experimental and last theory.
We have used the CLEO-II detector at Cornell Electron Storage Ringe (CESR) to study inclusive production of charmonium mesons in a sample 2.15 million BB¯ events. find branching fractions (1.12±0.04±0.06)% for B→J/ψX, (0.34±0.04±0.03)% B→ψ′X, and (0.40±0.06±0.04)% B→χc1X. also some evidence χc2, set an upper limit fraction decay B→ηcX 0.9% 90% confidence level. Momentum spectra J/ψ, ψ′, χc1 are presented. These measurements compared theoretical calculations.Received 13 December...
We consider the decay of Υ(1S) particles produced at CESR into a photon which is observed by CLEO detector plus are not seen. These could be real fall outside our acceptance, or noninteracting. report results search fo process Υ(1S)→γ+''unseen'' for energies >1 GeV, obtaining limits case where ''unseen'' either single particle particle-antiparticle pair. Our upper represent highest sensitivity measurements such decays to date.Received 11 August...
A staged approach towards muon based facilities for Intensity and Energy Frontier science, building upon existing proposed at Fermilab, is presented. At each stage, a facility exploring new physics also provides an R&D platform to validate the technology needed subsequent stages. The envisioned program begins with nuSTORM, sensitive sterile neutrino search which precision cross-section measurements while developing of using cooling muons. Neutrino Factory Project X, sending beams Sanford...