J. W. Gary
A5042342307- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- Advanced Data Storage Technologies
- Radiation Therapy and Dosimetry
- International Science and Diplomacy
- Radioactive Decay and Measurement Techniques
- Noncommutative and Quantum Gravity Theories
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Stochastic processes and statistical mechanics
University of California, Riverside
2016-2025
University of California System
2024-2025
Institute of High Energy Physics
2022-2024
A. Alikhanyan National Laboratory
2022-2024
University of Antwerp
2024
University of California, San Diego
2005-2023
VDE Prüf- und Zertifizierungsinstitut (Germany)
2022
John Wiley & Sons (Germany)
2022
Fraunhofer Institute for Interfacial Engineering and Biotechnology
2022
Ruhr University Bochum
2022
Dark sectors charged under a new Abelian interaction have recently received much attention in the context of dark matter models. These models introduce light mediator, so-called photon (A′), connecting sector to standard model. We present search for reaction e+e−→γA′, A′→e+e−, μ+μ− using 514 fb−1 data collected with BABAR detector. observe no statistically significant deviations from model predictions, and we set 90% confidence level upper limits on mixing strength between at 10−4−10−3...
We study the decay ${B}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ using $117\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ events collected at $Y(4S)$ resonance with BABAR detector PEP-II ${e}^{+}{e}^{\ensuremath{-}}$ asymmetric-energy storage ring. measure branching fractions $\mathcal{B}$...
We study the reaction e+e−→e+e−π0 in single tag mode and measure differential cross section dσ/dQ2 γγ∗→π0 transition form factor momentum transfer range from 4 to 40 GeV2. At Q2>10 GeV2 measured exceeds asymptotic limit predicted by perturbative QCD. The analysis is based on 442 fb−1 of integrated luminosity collected at PEP-II with BABAR detector e+e− center-of-mass energies near 10.6 GeV.16 MoreReceived 29 May 2009DOI:https://doi.org/10.1103/PhysRevD.80.052002©2009 American Physical Society
We present a measurement of the cross section process e(+)e(-)-->pi(+)pi(-)psi(2S) from threshold up to 8 GeV center-of-mass energy using events containing initial-state radiation, produced at SLAC PEP-II e(+)e(-) storage rings. The study is based on 298 fb(-1) data recorded with BABAR detector. A structure observed in not far above threshold, near 4.32 GeV. also investigate compatibility this Y(4260) previously reported by experiment.
This paper reports measurements of processes: e+e−→γKS0K±π∓, e+e−→γK+K−π0, e+e−→γϕη, and e+e−→γϕπ0. The initial-state radiated photon allows to cover the hadronic final state in energy range from thresholds up ≈4.6 GeV. overall size data sample analyzed is 232 fb−1, collected by BABAR detector running at PEP-II e+e− storage ring. From Dalitz plot analysis KS0K±π∓ state, moduli, relative phase isoscalar isovector components e+e−→KK*(892) cross section are determined. Parameters ϕ ρ...
We present measurements of the flavor-changing neutral current decays B --> Kl+l- and K*l+l-, where l+l- is either an e+e- or mu+mu- pair. The data sample comprises 229 x 10^6 Y(4s) -->to BBbar collected with BaBar detector at PEP-II storage ring. Flavor-changing are highly suppressed in Standard Model their predicted properties could be significantly modified by new physics electroweak scale. measure branching fractions B(B Kll) = (0.34 +- 0.07 0.02) 10^{-6}, K*ll) (0.78^{+0.19}_{-0.17}...
In a search for $B\ensuremath{\rightarrow}c\overline{c}\ensuremath{\gamma}K$ decays with the BABAR detector, where $c\overline{c}$ includes $J/\ensuremath{\psi}$ and $\ensuremath{\psi}(2S)$, $K$ ${K}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}_{S}^{0}$, ${K}^{*}(892)$, we find evidence $X(3872)\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\gamma}$ $X(3872)\ensuremath{\rightarrow}\ensuremath{\psi}(2S)\ensuremath{\gamma}$ $3.6\ensuremath{\sigma}$ $3.5\ensuremath{\sigma}$ significance,...
We study the processes e+e−→2(π+π−)π0γ, 2(π+π−)ηγ, K+K−π+π−π0γ and K+K−π+π−ηγ with hard photon radiated from initial state. About 20 000, 4300, 5500, 375 fully reconstructed events, respectively, are selected 232 fb−1 of BABAR data. The invariant mass hadronic final state defines effective e+e− center-of-mass energy, so that obtained cross sections threshold to about 5 GeV can be compared corresponding direct measurements, currently available only for ηπ+π− ωπ+π− submodes e+e−→2(π+π−)π0...
We search for the production of doubly charmed baryons in e+e− annihilations at or near a center-of-mass energy 10.58 GeV, data sample with an integrated luminosity 232 fb−1 recorded BABAR detector PEP-II storage ring Stanford Linear Accelerator Center. Ξ+cc final states Λ+cK−π+ and Ξ0cπ+, Ξ++cc Λ+cK−π+π+ Ξ0cπ+π+. find no evidence baryons.Received 18 May 2006DOI:https://doi.org/10.1103/PhysRevD.74.011103©2006 American Physical Society
We present a study of the decays B0,+→J/ψωK0,+ using 383×106 B¯¯¯B events obtained with BABAR detector at PEP-II. observe Y(3940)→J/ψω, mass 3914.6+3.8−3.4(stat)±2.0(syst) MeV/c2, and width 34+12−8(stat)±5(syst) MeV. The ratio B0 B+ decay to YK is 0.27+0.28−0.23(stat)+0.04−0.01(syst), relevant branching fractions are reported.Received 14 November 2007DOI:https://doi.org/10.1103/PhysRevLett.101.082001©2008 American Physical Society
We report the results of a search for bottomonium ground state eta_b(1S) in photon energy spectrum with sample (109 +/- 1) million Upsilon(3S) recorded at BABAR detector PEP-II B factory SLAC. observe peak E_gamma = 921.2 {+2.1} {-2.8} (stat) 2.4(syst) MeV significance 10 standard deviations. interpret observed as being due to monochromatic photons from radiative transition -> gamma eta_b(1S). This corresponds an mass $9388.9 {+3.1} {-2.3} 2.7(syst) MeV/c2. The hyperfine...
We report the results of a search for $Z(4430)^-$ decay to $J/\psi\pi^-$ or $\psi(2S)\pi^-$ in $B^{-,0}\to \jpsi\pi^- K^{0,+}$ and \psitwos \pi^- decays. The data were collected with BABAR detector at SLAC PEP-II asymmetric-energy $e^+e^-$ collider operating center mass energy 10.58 \gev, sample corresponds an integrated luminosity 413 fb$^{-1}$. Each $K\pi$ distribution exhibits clear $K^{\ast}(892)$ $K^{\ast}_2(1430)$ signals, efficiency-corrected spectrum is well-described by...
We present a study of resonances in exclusive decays $B$ mesons to ${\overline{D}}^{(*)}{D}^{(*)}K$. report the observation $B\ensuremath{\rightarrow}{\overline{D}}^{(*)}{D}_{s1}^{+}(2536)$ where ${D}_{s1}^{+}(2536)$ is reconstructed ${D}^{*0}{K}^{+}$ and ${D}^{*+}{K}_{S}^{0}$ decay channels. also $B\ensuremath{\rightarrow}\ensuremath{\psi}(3770)K$ $\ensuremath{\psi}(3770)$ ${\overline{D}}^{0}{D}^{0}$ ${D}^{\ensuremath{-}}{D}^{+}$. In addition, we an enhancement for...
We present a measurement of the direct CP violating asymmetry in decay B0-->K+pi(-) using data sample 227x10(6) Upsilon(4S)-->BB decays collected with BABAR detector at PEP-II asymmetric-energy e(+)e(-) collider SLAC. observe total signal yield nK-(pi(+))+nK+(pi(-))=1606+/-51 and measure (nK-(pi(+))-nK+(pi(-)))/(nK-(pi(+))+nK+(pi(-)))=-0.133+/-0.030(stat)+/-0.009(syst). The probability observing such an absence violation is 1.3x10(-5), corresponding to 4.2 standard deviations.
We measure the branching fraction for flavor-changing neutral-current process B-->X(s)l(+)l(-) with a sample of 89x10(6) Upsilon(4S)-->BBmacr; events recorded BABAR detector at PEP-II e(+)e(-) storage ring. The final state is reconstructed from or micro(+)micro(-) pairs and hadronic system X(s) consisting one K+/- K(0)(S) up to two pions, most pi(0). observe signal 40+/-10(stat)+/-2(syst) extract inclusive B(B-->X(s)l(+)l(-))=(5.6+/-1.5(stat)+/-0.6(exp syst)+/-1.1(model syst))x10(-6)...
The process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}\ensuremath{\gamma}$ has been studied at a center-of-mass energy near the $\ensuremath{\Upsilon}(4S)$ resonance using $89.3\text{ }\text{ }{\mathrm{f}\mathrm{b}}^{\ensuremath{-}1}$ data sample collected with BABAR detector PEP-II collider. From measured $3\ensuremath{\pi}$ mass spectrum we have obtained products of branching fractions for...
We study the initial-state-radiation processes ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{\gamma}$ and ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}\ensuremath{\gamma}$ using an integrated luminosity of $232\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected at $\ensuremath{\Upsilon}(4S)$ mass with BABAR...
We observe a new Ds meson with mass (2856.6±1.5stat±5.0syst) MeV/c2 and width (48±7stat±10syst) decaying into D0K+ D+K0S. In the same distributions, we also broad structure (2688±4stat±3syst) (112±7stat±36syst) MeV/c2. To obtain this result, use 240 fb−1 of data recorded by BABAR detector at PEP-II asymmetric-energy e+e− storage rings Stanford Linear Accelerator Center running center-of-mass energies near 10.6 GeV.Received 27 July 2006DOI:https://doi.org/10.1103/PhysRevLett.97.222001©2006...
We study the ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathit{\ensuremath{\Lambda}}\overline{\mathit{\ensuremath{\Lambda}}}\ensuremath{\gamma}$, $\mathit{\ensuremath{\Lambda}}{\overline{\mathit{\ensuremath{\Sigma}}}}^{0}\ensuremath{\gamma}$, ${\mathit{\ensuremath{\Sigma}}}^{0}{\overline{\mathit{\ensuremath{\Sigma}}}}^{0}\ensuremath{\gamma}$ processes using $230\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of integrated luminosity collected by BABAR detector at...
A search for charmed baryons decaying to D(0)p reveals two states: the Lambdac(2880)+ baryon and a previously unobserved state at mass of [2939.8+/-1.3(stat)+/-1.0(syst)] MeV/c2 with an intrinsic width [17.5+/-5.2(stat)+/-5.9(syst)] MeV. Consistent significant signals are observed K(-)pi(+) K(-)pi(+)pi(-)pi(+) decay modes D0 in 287 fb(-1) annihilation data recorded by BABAR detector center-of-mass energy 10.58 GeV. There is no evidence D+p spectrum doubly charged partners. The relative yield...