Now showing items 275-294 of 402

  • Radiative Decay Rates in Hg+ from Observations of Quantum Jumps in a Single Ion 

    Itano, Wayne M.; Bergquist, J.C.; Hulet, Randall G.; Wineland, D.J. (1987)
    Radiative decay rates connecting the lowest four energy levels of Hg+198 have been derived solely from an analysis of the fluctuations (quantum jumps) of the laser-induced fluorescence of the 194-nm first resonance transition ...
  • Radiative lifetime of the 2P state of lithium 

    McAlexander, W.I.; Abraham, E.R.I.; Hulet, R.G. (1996)
    We determine the radial dipole moment between the 2S and 2P states of atomic lithium by analyzing the long-range vibrational eigenenergies of the singly excited diatomic molecule. The result can be expressed in terms of ...
  • RCM-E simulation of bimodal transport in the plasma sheet 

    Yang, Jian; Wolf, Richard A.; Toffoletto, Frank R.; Sazykin, Stanislav; Wang, Chih-Ping (2014)
    Plasma sheet transport is bimodal, consisting of both large-scale adiabatic convection and intermittent bursty flows in both earthward and tailward directions. We present two comparison simulations with the Rice Convection ...
  • Realization of a measurement of a ‘‘weak value’’ 

    Ritchie, N.W.M.; Story, J.G.; Hulet, Randall G. (1991)
    We present the first realization of a measurement of a ‘‘weak value,’’ a concept recently introduced by Aharonov, Albert, and Vaidman (AAV). Our experiment uses a birefringent crystal to separate the two linear-polarization ...
  • Renormalized energies of superfluorescent bursts from an electron-hole magnetoplasma with high gain in InxGa1−xAs quantum wells 

    Kim, J.-H.; Lee, J.; Noe, G.T.; Wang, Y.; Wojcik, A.K.; McGill, S.A.; Reitze, D.H.; Belyanin, A.A.; Kono, J. (2013)
    We study light emission properties of a population-inverted 2D electron-hole plasma in a quantizing magnetic field. We observe a series of superfluorescent (SF) bursts, discrete both in time and energy, corresponding ...
  • Robust Subnanometric Plasmon Ruler by Rescaling of the Nonlocal Optical Response 

    Teperik, T.V.; Nordlander, P.; Aizpurua, J.; Borisov, A.G. (2013)
    We present the optical response of two interacting metallic nanowires calculated for separation distances down to angstrom range. State-of-the-art local and nonlocal approaches are compared with full quantum time-dependent ...
  • Rydberg Atoms in "Circular" States 

    Hulet, Randall G.; Kleppner, Daniel (1983)
    The population of a beam of lithium atoms has been transferred from a low angular momentum Rydberg state to a state with |m|=n−1, with nearly 100% efficiency. Selective field ionization is employed to detect the high |m| ...
  • Scanning-Ion Microscopy with Polarization Analysis (Simpa) 

    Zheng, N.J.; Rau, C. (1993)
    We have developed a novel, high-resolution magnetic imaging technique, scanning-ion microscopy with polarization analysis (SIMP A). In SIMP A, a highly-focused, scanning Ga+ ion beam is used to excite spin-polarized electrons ...
  • Scattering Spectra of Single Gold Nanoshells 

    Nehl, Colleen L.; Grady, Nathaniel K.; Goodrich, Glenn P.; Tam, Felicia; Halas, Naomi J.; Hafner, Jason H. (2004-11-04)
  • Search for anomalous production of events with three or more leptons in pp collisions at √s=8  TeV 

    CMS Collaboration; Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2014)
    A search for physics beyond the standard model in events with at least three leptons is presented. The data sample, corresponding to an integrated luminosity of 19.5  fb−1 of proton-proton collisions with center-of-mass ...
  • Search for baryon number violation in top-quark decays 

    CMS Collaboration; Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2014)
    A search for baryon number violation (BNV) in top-quark decays is performed using pp collisions produced by the LHC at √s=8 TeV. The top-quark decay considered in this search results in one light lepton (muon or electron), ...
  • Search for charged Higgs bosons through the violation of lepton universality in t¯t events using pp collision data at ps = 7 TeV with the ATLAS experiment 

    The ATLAS Collaboration (2013)
    In several extensions of the Standard Model, the top quark can decay into a bottom quark and a light charged Higgs boson H+, t → bH+, in addition to the Standard Model decay t → bW. Since W bosons decay to the three ...
  • Search for disappearing tracks in proton-proton collisions at √s = TeV 

    CMS Collaboration; Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2015)
    A search is presented for long-lived charged particles that decay within the CMS detector and produce the signature of a disappearing track. Disappearing tracks are identified as those with little or no associated calorimeter ...
  • Search for Displaced Supersymmetry in Events with an Electron and a Muon with Large Impact Parameters 

    CMS Collaboration; Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2015)
    A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at √s=8  TeV. Data used for the analysis were collected by the CMS detector and correspond to an ...
  • Search for excited quarks in the γ+jet final state in proton–proton collisions at √s=8 TeV 

    CMS Collaboration; Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2014)
    A search for excited quarks decaying into the γ+jet final state is presented. The analysis is based on data corresponding to an integrated luminosity of 19.7 fb−1 collected by the CMS experiment in proton–proton collisions ...
  • Search for Flavor-Changing Neutral Currents in Top-Quark Decays t → Zq in pp Collisions at √s=8 TeV 

    CMS Collaboration; Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2014)
    A search for flavor-changing neutral currents in top-quark decays t→Zq is performed in events produced from the decay chain tt¯→Zq+Wb, where both vector bosons decay leptonically, producing a final state with three leptons ...
  • Search for Flavor-Changing Neutral Currents in Top-Quark Decays t→Zq in pp Collisions at √s=8  TeV 

    CMS Collaboration; Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2014)
    A search for flavor-changing neutral currents in top-quark decays t→Zq is performed in events produced from the decay chain tt→Zq+Wb, where both vector bosons decay leptonically, producing a final state with three leptons ...
  • A SEARCH FOR GIANT PLANET COMPANIONS TO T TAURI STARS 

    Crockett, Christopher J.; Mahmud, Naved I.; Prato, L.; Johns-Krull, Christopher M.; Jaffe, Daniel T.; Hartigan, Patrick M.; Beichman, Charles A. (2012)
    We present results from an ongoing multiwavelength radial velocity (RV) survey of the Taurus–Auriga star-forming region as part of our effort to identify pre-main-sequence giant planet hosts. These 1–3 Myr old T Tauri ...
  • A search for giant planet companions to t tauri stars 

    Crockett, Christopher J.; Mahmud, Naved I.; Prato, L.; Johns-Krull, Christopher M.; Jaffe, Daniel T.; Hartigan, Patrick M.; Beichman, Charles A. (2012-12-05)
  • Search for heavy neutrinos and W bosons with right-handed couplings in proton–proton collisions at √s=8TeV 

    CMS Collaboration; Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2014)
    A search for heavy, right-handed neutrinos, Nℓ ( ℓ=e,μ ), and right-handed WR bosons, which arise in the left-right symmetric extensions of the standard model, has been performed by the CMS experiment. The search was based ...