A5066930549- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Tuberculosis Research and Epidemiology
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Mycobacterium research and diagnosis
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Pneumocystis jirovecii pneumonia detection and treatment
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
- Scientific Research and Discoveries
- Algorithms and Data Compression
- Antimicrobial Resistance in Staphylococcus
- Nuclear physics research studies
- Infectious Diseases and Mycology
- Cystic Fibrosis Research Advances
- Advanced Data Storage Technologies
- Blood groups and transfusion
- Stellar, planetary, and galactic studies
- Diverticular Disease and Complications
Colorado State University
2023-2025
RTI International
2024
University of Tennessee Health Science Center
2024
St. Jude Children's Research Hospital
2024
The University of Texas Health Science Center at San Antonio
2017
University of Kansas
1989-1996
University of Rochester
1995
University of Hawaiʻi at Mānoa
1994
Purdue University West Lafayette
1989-1994
University of Oklahoma
1992-1994
We have observed the decays ${\mathit{B}}^{0}$\ensuremath{\rightarrow}${\mathit{K}}^{\mathrm{*}}$(892${)}^{0}$\ensuremath{\gamma} and ${\mathit{B}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}${\mathit{K}}^{\mathrm{*}}$(892${)}^{\mathrm{\ensuremath{-}}}$\ensuremath{\gamma}, which are evidence for quark-level process b\ensuremath{\rightarrow}s\ensuremath{\gamma}. The average branching fraction is...
We report the first evidence of charmless semileptonic decays B mesons. In momentum interval 2.4–2.6 GeV/c where background from b→clν is negligible, average measured b→ueν and b→uμν partial branching ratios ΔBub(2.4,2.6) =(1.8±0.4±0.3)×10−4. Inclusion data 2.2–2.4 GeV/c, lepton yield dominated by b→clν, gives ΔBub(2.2,2.6) =(3.3±0.8±0.8)×10−4. ‖Vub/Vcb‖ depends on theoretical model b→ulν decay approximately 0.1.Received 8 November 1989DOI:https://doi.org/10.1103/PhysRevLett.64.16©1990...
We have measured ${B}^{0}$B${\ifmmode\bar\else\textasciimacron\fi{}}^{0}$ mixing by observing like-sign dilepton events in \ensuremath{\Upsilon}(4S) decay. Assuming that the semileptonic branching fractions of charged and neutral B mesons are equal decays to ${B}^{+}$${B}^{\mathrm{\ensuremath{-}}}$ 55% time 45% time, we measure parameter r be 0.19\ifmmode\pm\else\textpm\fi{}0.06\ifmmode\pm\else\textpm\fi{}0.06, where first error is statistical second systematic.
Mycobacterium abscessus is increasingly recognized as the causative agent of chronic pulmonary infections in humans. One genes found to be under strong evolutionary pressure during adaptation M. human lung embC which encodes an arabinosyltransferase required for biosynthesis cell envelope lipoglycan, lipoarabinomannan (LAM). To assess impact patient-derived mutations on physiology and virulence , were introduced isogenic background ATCC 19977 resulting strains probed phenotypic changes a...
Like other tuberculous and nontuberculous mycobacterial pathogens of human lung such as Mycobacterium tuberculosis M. abscessus, avium is likely exposed to a variety stressors during infection, including hypoxic conditions inside activated macrophages in the avascular necrotic regions granulomas. How survives stress establish chronic infection currently not well understood. Using RNA-sequencing, we here show that grown under progressive microaerophilic activates more than 4-fold subset 16...
Using data collected by the CLEO II detector, we have observed two states decaying to ${\ensuremath{\Lambda}}_{c}^{+}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$. Relative ${\ensuremath{\Lambda}}_{c}^{+}$, their mass splittings are measured be $+307.5\ifmmode\pm\else\textpm\fi{}0.4\ifmmode\pm\else\textpm\fi{}1.0$ and $+342.2\ifmmode\pm\else\textpm\fi{}0.2\ifmmode\pm\else\textpm\fi{}0.5\mathrm{MeV}{/c}^{2}$, respectively; this represents first measurement of less massive state....
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...
We report new measurements of semileptonic branching fractions $B$ mesons produced at the $\ensuremath{\Upsilon}(4S)$ resonance determined by fitting inclusive electron and muon momentum spectra to different theoretical models. Using $B(\overline{B}\ensuremath{\rightarrow}X{\ensuremath{\ell}}^{\ensuremath{-}}\overline{\ensuremath{\nu}})$ denote average for decay electrons muons, we obtain...
We have studied hadronic decays of B mesons. report measurements exclusive branching ratios several charm decay modes mesons to final states with a D or D∗ and one three charged pions ρ ψ ψ′, kaon, up two pions. also measured inclusive for the spectra these particles in decays. The total content is found be (101±12)%. are compared form-factor models. extract parameters a1 a2 model Bauer, Stech, Wirbel DS constant. masses ¯B0 B− measured. mass difference between -0.4±0.6±0.5 MeV/c2.Received...
We report results on inclusive production of the charmed baryon Λc+ from e+e− annihilations at √s=10.5 GeV. Measurements are presented cross section times branching fraction for continuum as observed in six different decay modes, and a new, improved value mass. The into pK−π+ is measured to be 10.0±1.5±1.5 pb summed over all xp. fractions p¯K0, p¯K0π+π−, Λπ+, Λπ+π−π+, Ξ−K+π+ relative that 0.44±0.07±0.05, 0.43±0.12±0.04, 0.18±0.03±0.03, 0.65±0.11±0.12, 0.15±0.04±0.03, respectively. mass...
Using the CLEO detector at Cornell Electron Storage Ring, we have found evidence for L=1 charmed mesons in e+e− annihilations. We observe a D**0 state mass 2461±3±1 MeV/c2 and width 20−12−10+9+9 decaying to D+π−. also see an enhancement m(D*+π−)−m(D*+) mass-difference spectrum by examining D*+ decay-angle dependence, structure consistent with two states D*+π−. lower-mass state, (2428±3±2) (23−6−4+8+10) MeV/c2, assuming that higher-mass component is from decay D**0(2461)→D*+π−. present...
Using a sample of 484 000 B mesons collected with the CLEO detector at Cornell Electron Storage Ring, we have measured B(B\ifmmode\bar\else\textasciimacron\fi{} $^{0}\mathrm{D}^{\mathrm{*}+}$${\mathrm{l}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\nu}) and found that polarization ${D}^{\mathrm{*}+}$ is small. These results are compared models semileptonic decay.
The Nix-TB clinical trial evaluated a new 6 month regimen containing three oral drugs; bedaquiline (B), pretomanid (Pa), and linezolid (L) (BPaL regimen) for the treatment of tuberculosis (TB). This achieved remarkable results as almost 90% multidrug-resistant or extensively drug-resistant TB participants were cured but many patients also developed severe adverse events (AEs). AEs associated with long-term administration protein synthesis inhibitor linezolid. Spectinamide 1599 is...
We report a measurement of Λ polarization in the two-body decay Λ+c→Λπ+, nonresonant e+e− interactions from data taken with CLEO detector. Using these we have determined parity-violating asymmetry parameter αΛc to be -1.0+0.4−0.0. see no evidence for significant Λ+c polarization.Received 10 August 1990DOI:https://doi.org/10.1103/PhysRevLett.65.2842©1990 American Physical Society
Using the CLEO II data sample, with an integrated luminosity of 1.8 fb−1 at and near Υ(4S) resonance, we have observed a signal for D0→K+π−, which could be due to either D0D¯0 mixing or doubly Cabibbo suppressed decay, combination two. We find scrB(D0→K+π−)/scrB(D0→K−π+)=0.0077±0 .0025(stat) ±0.0025(syst).Received 2 December 1993DOI:https://doi.org/10.1103/PhysRevLett.72.1406©1994 American Physical Society
From a data sample of 242 000 BB\ifmmode\bar\else\textasciimacron\fi{} pairs collected with the CLEO detector at \ensuremath{\Upsilon}(4S) resonance, we set upper limits for branching ratios exclusive hadronic decays B mesons arising from b\ensuremath{\rightarrow}u transitions. Model-dependent ratio Kobayashi-Maskawa matrix elements ${V}_{\mathrm{ub}}$/${V}_{\mathrm{cb}}$ are presented.
With the CLEO-II detector at Cornell Electron Storage Ring, we have measured branching fractions for tau lepton decay into one-prong final states with multiple ${\mathrm{\ensuremath{\pi}}}^{0}$'s ${\mathit{B}}_{\mathit{h}\mathit{n}\mathrm{\ensuremath{\pi}}}^{0}$, normalized to fraction one charged particle and a single ${\mathrm{\ensuremath{\pi}}}^{0}$. We find...
Using the CLEO II detector at Cornell Electron Storage Ring, we have determined inclusive ${\mathit{B}}^{\mathrm{*}}$ cross section above \ensuremath{\Upsilon}(4S) resonance in energy range from 10.61 to 10.70 GeV. We also report a new measurement of ${\mathit{B}}^{\mathrm{*}}$\ensuremath{\rightarrow}B\ensuremath{\gamma} transition photon 46.2\ifmmode\pm\else\textpm\fi{}0.3\ifmmode\pm\else\textpm\fi{}0.8 MeV.
Using the CsI calorimeter of CLEO II detector, spin triplet χb(2P) states are observed in Υ(3S) radiative decays with much higher statistics than seen previous experiments. The mass splittings not described well by theoretical models, while relative branching ratios agree predictions that include relativistic corrections to transition rates.Received 30 May 1991DOI:https://doi.org/10.1103/PhysRevLett.67.1696©1991 American Physical Society
Using the CLEO detector at Cornell Electron Storage Ring (CESR), we have determined ratio Γ(Ds+→φl+ν)/Γ(Ds+ →φπ+)=0.49±0.10−0.14+0.10. We use this measurement to derive B(Ds+→φπ+).Received 28 June 1990DOI:https://doi.org/10.1103/PhysRevLett.65.1531©1990 American Physical Society
The covalent modification of bacterial (lipo)polysaccharides with discrete substituents may impact their biosynthesis, export and/or biological activity. Whether mycobacteria use a similar strategy to control the biogenesis its cell envelope polysaccharides and modulate interaction host during infection is unknown despite report number tailoring modifying structure these glycans. Here, we show that succinyl strategically positioned on Mycobacterium tuberculosis ( Mtb ) lipoarabinomannan...