A5058751141- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- Superconducting Materials and Applications
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Advanced Data Storage Technologies
- Particle accelerators and beam dynamics
- Distributed and Parallel Computing Systems
- Radiation Detection and Scintillator Technologies
- Lanthanide and Transition Metal Complexes
- Atomic and Molecular Physics
- Parallel Computing and Optimization Techniques
- Stochastic processes and statistical mechanics
- Radiation Therapy and Dosimetry
- Electron and X-Ray Spectroscopy Techniques
- Advanced NMR Techniques and Applications
University of Mississippi
2011-2022
University of South Alabama
2009-2022
Laboratoire d’Annecy de Physique des Particules
2004-2018
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
2018
University of the Basque Country
2018
Institut National de Physique Nucléaire et de Physique des Particules
2018
Centre National de la Recherche Scientifique
2018
Universitat de Barcelona
2018
Campbell Collaboration
2009-2013
Sewanee: The University of the South
2010
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...
This article reports world averages for measurements of b-hadron and c-hadron properties obtained by the Heavy Flavor Averaging Group (HFAG) using results available at end 2007. For averaging, common input parameters used in various analyses are adjusted (rescaled) to values, known correlations taken into account. The include branching fractions, lifetimes, neutral meson mixing parameters, CP violation semileptonic decays.
We present a search for the direct production of light pseudoscalar decaying into two photons with Belle II detector at SuperKEKB collider. process e^{+}e^{-}→γa, a→γγ in mass range 0.2<m_{a}<9.7 GeV/c^{2} using data corresponding to an integrated luminosity (445±3) pb^{-1}. Light pseudoscalars interacting predominantly standard model gauge bosons (so-called axionlike particles or ALPs) are frequently postulated extensions model. find no evidence ALPs and set 95% confidence level upper...
We describe the status of our effort to realize a first neutrino factory and progress made in understanding problems associated with collection cooling muons towards that end. summarize physics can be done factories as well intense cold beams muons. The potential muon colliders is reviewed, both Higgs Factories compact high energy lepton colliders. timescale research development reviewed latest designs channels including promise ring coolers achieving longitudinal transverse simultaneously....
We present the first measurement of D*+ width using 9/fb e+ e- data collected near Upsilon(4S) resonance by CLEO II.V detector. Our method uses advanced tracking techniques and a reconstruction that takes advantage small vertical size CESR beam spot to measure energy release distribution from -> D0 pi+ decay. find Gamma(D*+) = 96 +- 4 (Statistical) 22 (Systematic) keV. also in decay compute Delta m m(D*+) - m(D0) 145.412 0.002 0.012 MeV/c^2
We report on a study of the invariant mass spectrum hadronic system in decay ${\ensuremath{\tau}}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}{\ensuremath{\nu}}_{\ensuremath{\tau}}.$ This was performed with data obtained CLEO II detector operating at CESR ${e}^{+}{e}^{\ensuremath{-}}$ collider. present fits to phenomenological models which resonance parameters associated $\ensuremath{\rho}(770)$ and $\ensuremath{\rho}(1450)$ mesons are...
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...
We present the first measurement of D*(+) width using 9/fb e(+)e(-) data collected near Upsilon(4S) resonance by CLEO II.V detector. Our method uses advanced tracking techniques and a reconstruction that takes advantage small vertical size Cornell Electron-positron Storage Ring beam spot to measure energy release distribution from D*(+)-->D(0)pi(+) decay. find gamma(D*(+)) = 96+/-4 (stat)+/-22 (syst) keV. also in decay compute Delta m identical with m(D*(+))-m(D(0)) 145.412+/-0.002...
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.
Theories beyond the standard model often predict existence of an additional neutral boson, $Z^{\prime}$. Using data collected by Belle II experiment during 2018 at SuperKEKB collider, we perform first searches for invisible decay a $Z^{\prime}$ in process $e^+ e^- \to \mu^+ \mu^- Z^{\prime}$ and lepton-flavor-violating e^{\pm} \mu^{\mp} Z^{\prime}$. We do not find any excess events set 90\% credibility level upper limits on cross sections these processes. translate former, framework...
Abstract We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom ( "Image missing"<!-- image only, no MathML or LaTex -->) mesons at Belle II. The provide essential inputs for measurements mixing and charge-parity violation. validate evaluate performance using hadronic --> decays with flavor-specific final states reconstructed in a data set corresponding an integrated luminosity 62.8 fb $$^{-1}$$ <mml:math...
We study the processes e^{+}e^{-}→ωχ_{bJ}(1P) (J=0, 1, or 2) using samples at center-of-mass energies sqrt[s]=10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, 4.7 fb^{-1} of integrated luminosity, respectively. These data were collected with Belle II detector during special operations SuperKEKB collider above ϒ(4S) resonance. report first observation ωχ_{bJ}(1P) signals sqrt[s]=10.745 GeV. By combining results sqrt[s]=10.867 we find energy dependencies Born cross sections for...
In a sample of 19 million produced B mesons, we have observed the decays -> eta K* and improved our previous measurements eta'K. The branching fractions measure for these decay modes are BR(B+ K*+) = (26.4 +9.6-8.2 +- 3.3) x $10^{-6}$, BR(B0 K*0) (13.8 +5.5-4.6 1.6) eta' K+) (80 +10-9 7) $10^{-6}$ K0) (89 +18-16 9) $10^{-6}$. We searched with comparable sensitivity related report upper limits fractions.
We report results of searches for charmless hadronic B meson decays to pseudoscalar( pi(+/-), K+/-, pi(0), or K(0)(S))-vector( rho, K(*), omega) final states. By using 9.7x10(6) BB pairs collected with the CLEO detector, we first observation B(-)--->pi(-)rho(0), B(0)-->pi(+/-)rho(-/+), and B(-)-->pi(-)omega, which are expected be dominated by b-->u transitions. The measured branching fractions (10.4(+3.3)(-3.4)+/-2.1)x10(-6), (27.6(+8.4)(-7.4)+/-4.2)x10(-6), (11.3(+3.3)(-2.9)+/-1. 4)x10(-6),...
We search for CP-violating charge asymmetries (alpha(CP)) in the B meson decays to K(+/-)pi(-/+), K(+/-)pi(0), K(0)(S)pi(+/-), K(+/-)eta('), and omega pi(+/-). Using 9.66 million upsilon(4S) collected with CLEO detector, statistical precision on alpha(CP) is range of +/-0.12 +/-0.25 depending decay mode. While up +/-0.5 are possible within standard model, measured consistent zero all five modes studied.
We have studied charmless hadronic decays of $B$ mesons into two-body final states with kaons and pions observe three new processes the following branching fractions: $B(B\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}({4.3}_{\ensuremath{-}1.4}^{+1.6}\ifmmode\pm\else\textpm\fi{}0.5)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$,...
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...
The resonant structure of the four pion final state in decay →τ3ππ0ντ has been analyzed using 4.27 million τ+τ− pairs collected by CLEO II experiment at Cornell Electron Storage Ring. A partial wave analysis performed; spectral decomposition system is dominated ωπ and a1π states. mass width ρ′ resonance have extracted from a fit to →τωπντ function. We searched for second class currents spin-parity established an upper limit on non-vector current contribution.Received 30 September...
We present an update of the search for lepton family number violating decay $\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\tau}}\ensuremath{\mu}\ensuremath{\gamma}$ using 12.6 million ${\ensuremath{\tau}}^{+}{\ensuremath{\tau}}^{\ensuremath{-}}$ pairs collected with CLEO detector. No evidence a signal has been found and corresponding upper limit is...
We have studied two-body charmless hadronic decays of B mesons into the final states $\pi\pi$, $K \pi$, and $KK$. Using 3.3 million $B\bar{B}$ pairs collected with CLEO-II detector, we made first observation $B^0\to K^+\pi^-$, $B^+\to K^0\pi^+$, sum $B^+ \to \pi^+\pi^0$ K^+\pi^0$ (an average over charge-conjugate is always implied). place upper limits on branching fractions for remaining decay modes.
In a sample of $9.66\times 10^6 B\bar{B}$ pairs collected with the CLEO detector we make first observation B decays to an $\eta_c$ and kaon. We measure branching fractions $BR(B^+\to\eta_c K^+) = (0.69 + 0.26 - 0.21 +- 0.08 0.20)\times 10^{-3}$ $BR(B^0\to\eta_c K^0) (1.09 0.55 0.42 0.12 0.31)\times 10^{-3}$, where error is statistical, second systematic third from fraction uncertainty. From these extract decay constant in factorization approximation, $f_{\eta_c} 335 75$ MeV. also search for...
We describe several measurements using the decays D0→K+K− and π+π−. find ratio of partial widths, Γ(D0→K+K−)/Γ(D0→π+π−), to be 2.96±0.16±0.15, where first error is statistical second systematic. observe no evidence for direct CP violation, obtaining ACP(KK)=(0.0±2.2±0.8)% ACP(ππ)=(1.9±3.2±0.8)%. In limit violation we measure mixing parameter yCP=−0.012±0.025±0.014 by measuring lifetime difference between or π+π− neutral state, D0→K−π+. see mixing.Received 6 November...