A5022452694- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Superconducting Materials and Applications
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Advanced NMR Techniques and Applications
- Cosmology and Gravitation Theories
- Advanced Data Storage Technologies
- Quantum, superfluid, helium dynamics
- Radioactive Decay and Measurement Techniques
- Distributed and Parallel Computing Systems
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Nuclear reactor physics and engineering
- Electron Spin Resonance Studies
Massachusetts Institute of Technology
2008-2022
Institute of High Energy Physics
1998-2020
Campbell Collaboration
2013
Laboratoire d’Annecy de Physique des Particules
2001-2006
Adelphi University
2000
Princeton University
1987-1992
U.S. National Science Foundation
1990
California Institute of Technology
1985
Deutsches Elektronen-Synchrotron DESY
1985
SLAC National Accelerator Laboratory
1985
This work is on the Physics of B Factories. Part A this book contains a brief description SLAC and KEK Factories as well their detectors, BaBar Belle, data taking related issues. discusses tools methods used by experiments in order to obtain results. The results themselves can be found C. Please note that version 3 archive auxiliary book. uses notation alpha, beta, gamma for angles Unitarity Triangle. nominal phi_1, phi_2 phi_3. cite Eur. Phys. J. C74 (2014) 3026.
The reaction ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ has been analyzed using 97 ${\mathrm{pb}}^{\ensuremath{-}1}$ of data taken with the Crystal Ball detector at DESY ${e}^{\ensuremath{-}}{e}^{+}$ storage ring DORIS II beam energies around 5.3 GeV. For first time we have measured cross section for $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$...
Dark sectors, consisting of new, light, weakly-coupled particles that do not interact with the known strong, weak, or electromagnetic forces, are a particularly compelling possibility for new physics. Nature may contain numerous dark each their own beautiful structure, distinct particles, and forces. This review summarizes physics motivation sectors exciting opportunities experimental exploration. It is summary Intensity Frontier subgroup "New, Light, Weakly-coupled Particles" Community...
The reaction \ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}${\ensuremath{\pi}}^{0}$\ensuremath{\eta} has been investigated with the Crystal Ball detector at DESY storage ring DORIS II. Formation of \ensuremath{\delta}(980) and ${A}_{2}$(1320) observed \ensuremath{\gamma}\ensuremath{\gamma} partial widths ${\ensuremath{\Gamma}}_{\ensuremath{\gamma}\ensuremath{\gamma}}$(${A}_{2}$)=1.14\ifmmode\pm\else\textpm\fi{}0.20\ifmmode\pm\else\textpm\fi{}0.2 6 keV...
We report a new measurement of Rb = Gamma(Z0->b-bbar) / Gamma(Z0->hadrons) using double tag technique, where the b hemisphere selection is based on reconstructed mass B hadron decay vertex. The was performed sample 130k hadronic Z0 events, collected with SLD at SLC. method utilizes 3-D vertexing abilities CCD pixel vertex detector and small stable SLC beams to obtain high b-tagging efficiency purity. Rb=0.2142+/-0.0034(stat.)+/-0.0015(syst.)+/-0.0002(R_c).
The inclusive photon spectrum in hadronic decays of the $\ensuremath{\Upsilon}(2S)$ is measured with Crystal Ball detector at DORIS II. Four well separated lines, which are consistent decay hypothesis $\ensuremath{\Upsilon}(2S)\ensuremath{\rightarrow}\ensuremath{\gamma}+^{3}P_{2,1,0}$ and $^{3}P_{2,1}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\Upsilon}(1S)$, observed. energies lines from primary transitions...
We present the first measurement of correlation between $Z^0$ spin and three-jet plane orientation in polarized decays into three jets SLD experiment at SLAC utilizing a longitudinally electron beam. The CP-even T-odd triple product $\vec{S_Z}\cdot(\vec{k_1}\times \vec{k_2})$ formed from two fastest jet momenta, $\vec{k_1}$ $\vec{k_2}$, polarization vector $\vec{S_Z}$, is sensitive to physics beyond Standard Model. measure expectation value this quantity be consistent with zero set 95\% C.L....
The reaction ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$\ensuremath{\eta}${\ensuremath{\pi}}^{0}$${\ensuremath{\pi}}^{0}$ has been observed with the Crystal Ball detector at DORIS II storage ring DESY. \ensuremath{\eta}${\ensuremath{\pi}}^{0}$${\ensuremath{\pi}}^{0}$ mass spectrum is dominated by \ensuremath{\eta}', and two-photon width...
The lifetimes of B+ and B0 mesons are measured using a sample 150 000 hadronic Z0 decays collected by the SLD experiment at SLAC Linear Collider between 1993 1995. Two analyses presented in which decay length charge B meson reconstructed. first method uses novel topological vertexing technique while second semi-inclusively reconstructed semileptonic decays. analysis yields 6033 (3665) charged (neutral) vertices with good purity, whereas smaller 634 (584) excellent purity. Combining results...
We present an improved comparison of the strong coupling gluon to light (ql=u+d+s), c, and b quarks, determined from multijet rates in flavor-tagged samples hadronic Z0 decays recorded with SLC Large Detector at SLAC Linear Collider between 1993 1995. Flavor separation among primary qlql, cc¯, bb¯ final states was made on basis reconstructed mass long-lived heavy-hadron decay vertices, yielding tags high purity low bias against ⩾ 3-jet states. find:...
Based on a sample of approximately 500 000 hadronic Z0 decays accumulated between 1993 and 1998, the SLD experiment has set limits 24 fully charged two-body quasi-two-body exclusive charmless B+, B0, B0s mesons. The precise tracking capabilities detector provided for efficient reduction combinatoric backgrounds, yielding most available ten these modes.Received 27 October 1999DOI:https://doi.org/10.1103/PhysRevD.62.071101©2000 American Physical Society
The Crystal Ball detector at the DESY storage ring DORIS II has been used to study radiative decays of Υ(2S) resonance. We report on analysis exclusive channel Υ(2S)→γχb, χb→γΥ(1S)→e+e− or μ+μ−. detect two χb states by observing monochromatic photon lines energies (107.0±1.1±1.3) MeV and (131.7±0.9±1.3) MeV, respectively. product branching ratios B[Υ(2S)→γχb]×B[χb→γΥ(1S) ] are (1.6±0.3±0.2)% for first state (2.1±0.3±0.3)% second. For ratio third state, which observed in inclusive...
We have searched for signatures of polarization in hadronic jets from $Z^0 \to q \bar{q}$ decays using the ``jet handedness'' method. The polar angle asymmetry induced by high SLC electron-beam was used to separate quark antiquark jets, expected be left- and right-polarized, respectively. find no evidence jet handedness our global sample or a light we set upper limits at 95% C.L. 0.063 0.099 respectively on magnitude analyzing power method proposed Efremov {\it et al.}
We report a measurement of the average $B$-hadron lifetime using data collected with SLD detector at SLC in 1993. An inclusive analysis selected three-dimensional vertices information sample 50k $Z^{0}$ decays. A $1.564\pm0.030\,(\rm stat)\pm 0.037\,(\rm syst)$~ps was extracted from decay length distribution these binned maximum-likelihood method.
The absolute inclusive branching fraction of D+s→φX+ has been measured from data collected by the BES detector at a center-of-mass energy 4.03 GeV, corresponding to an integrated luminosity 22.3 pb−1. At this energy, direct pair production e+e−→D+sD−s observed. We have selected Ds candidate events reconstructing five hadronic decay modes D+s→φπ+, K0*K+, K0K+, f0π+ and K0K−π+π+ searched for φ’s in recoiling D−s. observed three 166.4 ± 31.8 events, which leads...