E. J. White
A5053463813- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- 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
- Nuclear physics research studies
- Radioactive Decay and Measurement Techniques
- Algorithms and Data Compression
- Advanced NMR Techniques and Applications
- GaN-based semiconductor devices and materials
- Cosmology and Gravitation Theories
- Advanced MEMS and NEMS Technologies
- 3D IC and TSV technologies
- Atomic and Molecular Physics
- Particle Detector Development and Performance
- Semiconductor materials and devices
- Cold Atom Physics and Bose-Einstein Condensates
- Advancements in Semiconductor Devices and Circuit Design
- Electronic and Structural Properties of Oxides
University of Illinois Urbana-Champaign
2005-2023
University of South Carolina
2014
University of Cincinnati
2011-2014
IBM (United States)
1989-2012
Carleton University
2009-2012
Campbell Collaboration
2012
University of Bonn
2006
University of Puerto Rico-Mayaguez
2006
Vanderbilt University
2003
Clarkson University
1989
The Belle detector at the KEKB electron-positron collider has collected almost 1 billion Y(4S) events in its decade of operation. Super-KEKB, an upgrade is under construction, to increase luminosity by two orders magnitude during a three-year shutdown, with ultimate goal 8E35 /cm^2 /s luminosity. To exploit increased luminosity, been proposed. A new international collaboration Belle-II, being formed. Technical Design Report presents physics motivation, basic methods accelerator upgrade, as...
Using data collected with the CLEO detector operating at CESR e+e- collider sqrt[s]=3.97-4.26 GeV, we investigate 15 charmonium decay modes of psi(4040), psi(4160), and Y(4260) resonances. We confirm, 11 sigma significance, BABAR Y(4260)-->pi+pi- J/psi discovery, make first observation Y(4260)--> pi(0)pi(0) (5.1 sigma), find evidence for Y(4260)-->K+K- J/psi(3.7 sigma). measure cross sections sqrt[s]=4.26 GeV as sigma(pi+pi- J/psi)=58(+12)(-10)+/-4 pb, sigma(pi(0)pi(0) J/psi)=23(+12)(-8)+/-1...
Using $13.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ collision data taken in the $\ensuremath{\Upsilon}(1S\ensuremath{-}4S)$ region with CLEO III detector at CESR collider, a search has been made for new resonance $Y(4260)$ recently reported by BABAR Collaboration. The production initial state radiation (ISR), and its decay into ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}J/\ensuremath{\psi}$, are confirmed. A good quality fit to our is...
Using the entire CLEO-c \psi(3770)-> D\bar{D} event sample, corresponding to an integrated luminosity of $818 pb^-1 and approximately 5.4 million events, we present a study decays D^0 -> \pi^- e^+ \nu_e, K^- D^+ \pi^0 \bar{K}^0 \nu_e. Via tagged analysis technique, in which one D is fully reconstructed hadronic mode, partial rates for semileptonic by other are measured several q^2 bins. We fit these using form factor parameterizations report results, including shape parameters branching...
We extract a relatively precise value for the decay constant of ${D}^{+}$ meson by measuring $\mathcal{B}({D}^{+}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}\ensuremath{\nu})=(4.40\ifmmode\pm\else\textpm\fi{}{0.66}_{\ensuremath{-}0.12}^{+0.09})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ using $281\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ data taken on $\ensuremath{\psi}(3770)$ resonance with CLEO-$c$ detector. find...
Using $281\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ collisions recorded at the $\ensuremath{\psi}(3770)$ resonance with CLEO-c detector CESR (Cornell Electron Storage Ring), we determine absolute hadronic branching fractions charged and neutral $D$ mesons using a double tag technique. Among measurements for three ${D}^{0}$ six ${D}^{+}$ modes, obtain reference...
We measure the branching ratio of purely leptonic decay D+ meson with unprecedented precision as B(D+ -> mu+ nu) = (3.82 +/- 0.32 0.09)x10^(-4), using 818/pb data taken on psi(3770) resonance CLEO-c detector at CESR collider. use this determination to derive a value for pseudoscalar constant fD+, combining measurements lifetime and assuming |Vcd| |Vus|. find fD+ (205.8 8.5 2.5) MeV. The rate asymmetry [B(D+ nu)-B(D- mu- nu)]/[B(D+ nu)+B(D- nu)] 0.08 0.08, consistent no CP violation. also set...
The h(c)((1)P(1)) state of charmonium has been observed in the reaction psi(2S) --> pi(0)h(c) (gammagamma)(gammaeta(c)) using 3.08 x10(6) decays recorded CLEO detector. Data have analyzed both for inclusive reaction, where decay products eta(c) are not identified, and exclusive reactions, which reconstructed seven hadronic channels. We find M(h(c)) = 3524.4 +/- 0.6 0.4 MeV corresponds to a hyperfine splitting DeltaM(hf)(1P) triple-bond <M((3)P(J)) - M((1)P(1)) +1.0 MeV, B(psi(2S) pi(0)h(c))...
We search for a non-SM-like CP-odd Higgs boson (a(1)(0)) decaying to tau(+)tau(-) or mu(+)mu(-) in radiative decays of the Upsilon(1S). No significant signal is found, and upper limits on product branching ratios are set. Our results almost 2 orders magnitude more stringent than previous limits. data provide no evidence state with mass 214 MeV mu(+)mu(-), previously proposed as an explanation 3 Sigma(+)-->pmu(+)mu(-) events observed by HyperCP experiment. constrain NMSSM models.
We examine e+e−→Ds−Ds*+ and Ds*−Ds+ interactions at 4170 MeV using the CLEO-c detector in order to measure decay constant fDs+ with good precision. Previously our measurements were substantially higher than most precise lattice based QCD calculation of (241±3) MeV. Here we use Ds+→ℓ+ν channel, where ℓ+ designates either a μ+ or τ+, when τ+→π+ν¯. Analyzing both modes independently, determine B(Ds+→μ+ν)=(0.565±0.045±0.017)%, B(Ds+→τ+ν)=(6.42±0.81±0.18)%. also analyze them simultaneously find...
Using e+e−→D−sD*+s and D*−sD+s interactions at 4170 MeV collected with the CLEO-c detector, we investigate semileptonic decays D+s→f0(980)e+ν D+s→ϕe+ν. By examining decay rates as functions of four-momentum transfer squared q2, measure ratio [dBdq2(D+s→f0(980)e+ν)B(f0→π+π−)]/[dBdq2(D+s→ϕe+ν)B(ϕ→K+K−)] q2 zero to be (42±11)%. This has been predicted equal rate [B(Bs→J/ψf0)B(f0→π+π−)]/[B(Bs→J/ψϕ)B(ϕ→K+K−)], thus indicating that CP eigenstate J/ψf0 could useful for measuring violation via Bs...
We report evidence for the ground state of bottomonium, eta_b(1S), in radiative decay Upsilon(3S) --> gamma eta_b e^+e^- annihilation data taken with CLEO III detector. Using 6 million decays, and assuming Gamma(eta_b) = 10 MeV/c^2, we obtain B(Upsilon(3S) eta_b) (7.1 +- 1.8 1.1) X 10^{-4}, where first error is statistical second systematic. The significance about 4 sigma. mass determined to be M(eta_b) 9391.8 6.6 2.0 which corresponds hyperfine splitting Delta M_{hf}(1S)_b 68.5 MeV/c^2. 9...
We observe signals for the decays ψ(3770)→XJ/ψ from data acquired with CLEO detector operating at CESR e+e− collider √s=3773 MeV. measure following branching fractions B(ψ(3770)→XJ/ψ) and significances: (189±20±20)×10−5 (11.6σ) X=π+π−, (80±25±16)×10−5 (3.4σ) X=π0π0, (87±33±22)×10−5 (3.5σ) X=η, where errors are statistical systematic, respectively. The radiative return process e+e−→γψ(2S) populates same event sample is used to Γee[ψ(2S)]=(2.54±0.03±0.11) keV.Received 9 August...
Analyzing 600/pb of e+e- collisions at 4170 MeV center-of-mass energy with the CLEO-c detector, we measure branching fraction B(Ds+ -> tau+ nu)=(5.52\pm 0.57\pm 0.21)% using rho^+ anti-nu decay mode. Combining other CLEO measurements nu) determine pseudoscalar constant fDs = (259.7\pm 7.8\pm 3.4) consistent value obtained from our Ds+ mu+ nu measurement (257.6\pm 10.3\pm 4.3) MeV. these find a fDs=(259.0 \pm 6.2\pm 3.0) MeV, that differs most accurate prediction based on unquenched lattice...
We have studied the leptonic decay ${D}_{s}^{+}\ensuremath{\rightarrow}{\ensuremath{\tau}}^{+}{\ensuremath{\nu}}_{\ensuremath{\tau}}$, via channel ${\ensuremath{\tau}}^{+}\ensuremath{\rightarrow}{e}^{+}{\ensuremath{\nu}}_{e}{\overline{\ensuremath{\nu}}}_{\ensuremath{\tau}}$, using a sample of tagged ${D}_{s}^{+}$ decays collected near ${D}_{s}^{*\ifmmode\pm\else\textpm\fi{}}{D}_{s}^{\ensuremath{\mp}}$ peak production energy in ${e}^{+}{e}^{\ensuremath{-}}$ collisions with CLEO-c detector....
Using data collected on the $\ensuremath{\psi}(3770)$ resonance and near ${D}_{s}^{*\ifmmode\pm\else\textpm\fi{}}{D}_{s}^{\ensuremath{\mp}}$ peak production energy by CLEO-c detector, we study decays of possible $D\ensuremath{\rightarrow}PP$ modes report measurements or upper limits all branching fractions for Cabibbo-favored, singly Cabibbo-suppressed, doubly Cabibbo-suppressed except involving ${K}_{L}^{0}$ (and ${D}^{0}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$)....
The spin-singlet $P$-wave state of charmonium, ${h}_{c}{(}^{1}{P}_{1})$, has been observed in the decay $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{h}_{c}$ followed by ${h}_{c}\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\eta}}_{c}$. Inclusive and exclusive analyses $M({h}_{c})$ spectrum have performed. Two complementary inclusive select either a range energies for photon emitted ${h}_{c}\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\eta}}_{c}$...
Using data obtained with the CLEO III detector, running at Cornell Electron Storage Ring (CESR), we report on a new study of exclusive radiative Υ(1S) decays into final states γπ+π−, γK+K−, and γp¯p. We present branching ratio measurements for decay modes Υ(1S)→γf2(1270), Υ(1S)→γf′2(1525), Υ(1S)→γK+K−; helicity production ratios f2(1270) f′2(1525); upper limits Υ(1S)→γfJ(2200), fJ(2220)→π+π−, K+K−, p¯p; an limit Υ(1S)→γX(1860), X(1860)→γp¯p.3 MoreReceived 4 October...
We describe a search for ψ(3770) decay to two-body non-D¯¯¯D final states in e+e− data produced by the CESR collider and analyzed with CLEO-c detector. Vector-pseudoscalar production ρ0π0, ρ+π−, ωπ0, ϕπ0, ρη, ωη, ϕη, ρη′, ωη′, ϕη′, K*0¯¯¯¯¯K0, K*+K− is studied along that of b1π (b01π0 b+1π−) π+π−π0. The largest amount disagreement between expected rate e+e−→γ∗→X e+e−→X at √s=3.773 GeV found X=ϕη, an excess cross section (2.4±0.6) pb [Γψ(3770)ϕη=(7.4±1.6) keV], suggestive suppression seen...
The branching fractions of D±s meson decays serve to normalize many measurements processes involving charm quarks. Using 298 pb−1 e+e− collisions recorded at a center mass energy 4.17 GeV, we determine absolute for eight with double tag technique. In particular the fraction B(D+s→K−K+π+)=(5.50±0.23±0.16)%, where uncertainties are statistical and systematic, respectively. We also provide partial kinematic subsets K−K+π+ decay mode.Received 18 December...
We perform a Dalitz plot analysis of D^+ -> K^-pi^+pi^+ decay with the CLEO-c data set 572 pb^-1 e^+e^- collisions accumulated at psi(3770). This corresponds to 1.6 million D^+D^- pairs from which we select 140793 candidate events small background 1.1%. compare our results previous measurements using isobar model. modify model improved description some contributing resonances, and get better agreement data. also consider quasi-model-independent approach measure magnitude phase K pi S wave in...
We study semileptonic B decay to the exclusive charmless states pi, rho/omega, eta, and eta;{'} using 16 fb(-1) CLEO Upsilon(4S) data sample. find B(B0-->pi-l+nu)=(1.37+/-0.15stat+/-0.11sys)x10(-4) B(B0-->rho-l+nu)=(2.93+/-0.37stat+/-0.37sys)x10(-4) evidence for B+-->eta'l+nu, with B(B+-->eta'l+nu)=(2.66+/-0.80stat+/-0.56sys)x10(-4). From our B-->pilnu rate q2>16 GeV2 lattice QCD, we |Vub|=(3.6+/0.4stat+/0.2syst-0.4thy+0.6)x10(-3) [corrected]
We measure the decay constant f(Ds+) using D(s+)-->l+ nu channel, where l+ designates either a mu+ or tau+, when tau+ -->pi+ nu. Using both measurements we find f(Ds+)=274+/-13+/-7 MeV. Combining with our previous determination of f(D+), compute ratio f(Ds+)/f(D+)=1.23+/-0.11+/-0.04. compare theoretical estimates.
We exploit the quantum coherence between pair-produced D0 and D0B in psi(3770) decays to make a first determination of relative strong phase differences D0--> K0Spi+pi- D0B--> K0Spi+pi-, which are great importance determining CKM angle gamma/phi3 B- --> (D0B) K- decays. Using 818 1/pb e+e- collision data collected with CLEO-c detector at Ecm = 3.77 GeV, we employ binned Dalitz-plot analysis K0S pi+pi- K0Lpi+pi- recoiling against flavor-tagged, CP-tagged tagged events determine these differences.
Using data acquired with the CLEO-c detector at CESR e+e− collider, we measure branching fractions for J/ψ, ψ(2S), and ψ(3770) decays to γπ0, γη, γη′. Defining Rn≡B[ψ(nS)→γη]/B[ψ(nS)→γη′], obtain R1=(21.1±0.9)% and, unexpectedly, an order of magnitude smaller limit, R2<1.8% 90% C.L. We also use J/ψ→γη′ events determine improved precision five most copious η′ decay modes.Received 8 April 2009DOI:https://doi.org/10.1103/PhysRevD.79.111101©2009 American Physical Society