Now showing items 440-459 of 702

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

(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 ...

(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 ...
• #### Rapidity distributions in exclusive Z+jet and γ+jet events in pp collisions at √s=7  TeV ﻿

(2013)
Rapidity distributions are presented for events containing either a Z boson or a photon with a single jet in proton-proton collisions produced at the CERN LHC. The data, collected with the CMS detector at √s=7  TeV, ...
• #### Ratios of dijet production cross sections as a function of the absolute difference in rapidity between jets in proton–proton collisions at √s=7 TeV ﻿

(2012)
A study of dijet production in proton–proton collisions was performed at √s=7~TeV for jets with p T>35 GeV and |y|<4.7 using data collected with the CMS detector at the LHC in 2010. Events with at least one pair of jets ...
• #### RCM-E simulation of a thin arc preceded by a north-south-aligned auroral streamer ﻿

(2014)
The Time History of Events and Macroscale Interactions during Substorms (THEMIS) all-sky imager data have recently revealed a repeatable sequence that occurs during many auroral substorms, in which a newly formed thin arc ...
• #### RCM-E simulation of bimodal transport in the plasma sheet ﻿

(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’’ ﻿

(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 ﻿

(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 Helical Edge Transport in Gated InAs/GaSb Bilayers ﻿

(2015)
We have engineered electron-hole bilayers of inverted InAs/GaSb quantum wells, using dilute silicon impurity doping to suppress residual bulk conductance. We have observed robust helical edge states with wide conductance ...
• #### Robust Subnanometric Plasmon Ruler by Rescaling of the Nonlocal Optical Response ﻿

(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 ﻿

(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) ﻿

(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 ﻿

(2004-11-04)
• #### A search for a doubly-charged Higgs boson in pp collisions at √s=7 TeV ﻿

(2012)
A search for a doubly-charged Higgs boson in pp collisions at √s=7 TeV is presented. The data correspond to an integrated luminosity of 4.9 fb−1, collected by the CMS experiment at the LHC. The search is performed using ...
• #### Search for a fermiophobic Higgs boson in pp collisions at √s=7 TeV ﻿

(2012)
Combined results are reported from searches for a fermiophobic Higgs boson in the γγ, WW, and ZZ decay modes in proton-proton collisions at √s=7 TeV. The explored Higgs boson mass range is 110–300 GeV. The data sample ...
• #### Search for a Higgs boson decaying into a b-quark pair and produced in association with b quarks in proton–proton collisions at 7 TeV ﻿

(2013)
A search for a neutral Higgs boson decaying to a pair of b quarks, and produced in association with at least one additional b quark, is presented. Multijet final states with three jets identified as originating from b ...
• #### Search for a Higgs boson decaying into a Z and a photon in pp collisions at √s=7 and 8 TeV ﻿

(2013)
A search for a Higgs boson decaying into a Z boson and a photon is described. The analysis is performed using proton–proton collision datasets recorded by the CMS detector at the LHC. Events were collected at center-of-mass ...
• #### Search for a Higgs boson in the decay channel H → ZZ(*) → q¯q ℓ − ℓ + in pp collisions at √s=7 TeV ﻿

(2012)
A search for the standard model Higgs boson decaying into two Z bosons with subsequent decay into a final state containing two quark jets and two leptons, H → ZZ(*) → qq¯¯¯ ℓ − ℓ + is presented. Results are based on data ...
• #### Search for a light charged Higgs boson in top quark decays in pp collisions at √s=7 TeV ﻿

(2012)
Results are presented on a search for a light charged Higgs boson that can be produced in the decay of the top quark t → H+b and which, in turn, decays into τ +ν τ . The analysed data correspond to an integrated luminosity ...
• #### Search for a Light Pseudoscalar Higgs Boson in the Dimuon Decay Channel in pp Collisions at √s=7  TeV ﻿

(2012)
The dimuon invariant mass spectrum is searched in the range between 5.5 and 14 GeV for a light pseudoscalar Higgs boson a, predicted in a number of new physics models, including the next-to-minimal supersymmetric standard ...