Our vacuum is teeming with virtual electron-positron pairs.    From Wordnik.com.  [Dawkins and ID] Reference

A new electron-positron collider called SPEAR became operational at SLAC in.    From Wordnik.com.  [The Nobel Prize in Physics 1995] Reference

Our vacuum is teeming with virtual electron-positron pairs kornbelt888: Irrelevant.    From Wordnik.com.  [Dawkins and ID] Reference

However, the one approved for construction in 1981 was an electron-positron collider.    From Wordnik.com.  [Makoto Kobayashi - Autobiography] Reference

A virtual electron-positron pair lasts something like 10-21 seconds before it disappears.    From Wordnik.com.  [How to Teach Physics to Your Dog] Reference

One virtual photon in ten thousand will create a virtual electron-positron pair, and so on.    From Wordnik.com.  [How to Teach Physics to Your Dog] Reference

In 1973 a new machine started operation at SLAC - an electron-positron collider called SPEAR.    From Wordnik.com.  [Press Release: The 1995 Nobel Prize in Physics] Reference

The "nothing" that FMM meant in his original post does not contain virtual electron-positron pairs.    From Wordnik.com.  [Dawkins and ID] Reference

Cambridge Electron Accelerator on electron-positron pair production by photon collision with a nuclear target.    From Wordnik.com.  [Samuel C.C. Ting - Autobiography] Reference

Then again, this is for an electron-positron collider everyone seems to think the background there will be negligible.    From Wordnik.com.  [Particle Flow Calorimetry « Imaginary Potential] Reference

This development led to the construction of electron-positron colliders and Richter, using such a collider, shared the 1976.    From Wordnik.com.  [Accelerators and Nobel Laureates] Reference

A few years later, in 1973, the electron-positron storage ring SPEAR was installed at the end of the SLAC linear accelerator.    From Wordnik.com.  [Additional background material on the Nobel Prize in Physics 1995] Reference

These developments are very important in connection with a future linear electron-positron collider currently considered in USA.    From Wordnik.com.  [Accelerators and Nobel Laureates] Reference

I truly believe we will need high energy electron-positron data to fully understand the physics that awaits us at the TeV scale.    From Wordnik.com.  [Designing the Next Big Machine] Reference

Nature Wednesday that they could have detected "Kaluza-Klein" electron-positron pairs resulting from the annihilation of these WIMPS.    From Wordnik.com.  [Wired Top Stories] Reference

Then the most energetic photons of light turned into electron-positron pairs, robbing the core of pressure and causing it to collapse.    From Wordnik.com.  [Superbright Supernova First Observed of Antimatter Variety | Universe Today] Reference

The recent Fermi Gamma ray detection of the galaxy center does indicate a lot of inverse Compton scattering of electron-positron pairs.    From Wordnik.com.  [New CMB Measurements Support Standard Model | Universe Today] Reference

The purpose of these elaborate works, carried out above the poles of pulsars as they gushed electron-positron plasmas, remained unknown.    From Wordnik.com.  [Tides Of Light]

Currently, our MIT group is participating in the construction of a large detector to study electron-positron annihilations at the Stanford.    From Wordnik.com.  [Jerome I. Friedman - Autobiography] Reference

The largest electron-positron collider ever built, LEP, Large electron positron collider, had a circumference of 27 km and was commissioned in 1989 at CERN.    From Wordnik.com.  [Accelerators and Nobel Laureates] Reference

Even before the ring at HEPL was operating, I had begun to think about a high-energy electron-positron colliding-beam machine and what one could do with it.    From Wordnik.com.  [Burton Richter - Autobiography] Reference

Our vacuum is teeming with virtual electron-positron pairs that come out for a brief moment (a billionth of a billionth of a second) and disappear into the vacuum again.    From Wordnik.com.  [Dawkins and ID] Reference

However, the Bondi-Spurgin interpretation of mass-energy equivalence has the demerit that it fails to address reactions such as the electron-positron annihilation reaction.    From Wordnik.com.  [The Equivalence of Mass and Energy] Reference

Q 4.17: A photon may convert into an electron-positron pair next to an electron rather than next to a nucleus.    From Wordnik.com.  [Scientific Blogging] Reference

This can happen when the core of a massive main sequence star becomes hot enough to generate electron-positron pairs.    From Wordnik.com.  [European Tribune] Reference

You should not ask the question what is the cross section to create two photons from the initial electron-positron pair.    From Wordnik.com.  [The Reference Frame] Reference

When gamma rays pass near the nuclei of atoms, they can turn their energy into two particles: an electron-positron pair.    From Wordnik.com.  [BBC News - Home] Reference

These TGFs have included gamma rays with an energy of 511 keV-the energy signature of an electron-positron annihilation event.    From Wordnik.com.  [Ars Technica] Reference

So many high-energy gamma rays are created that some literally turn from energy to mass in the form of an electron-positron pair.    From Wordnik.com.  [Ars Technica] Reference

This includes paths that involve highly improbable events like electron-positron pairs appearing out of nowhere, and disappearing again.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

Pendulum, damped harmonic oscillator, and electron-positron track may be rightly spoken of as observed in the narrower, scientific community.    From Wordnik.com.  [SOLO - Sense of Life Objectivists] Reference

If tetraquarks exist, there's a good chance that they will be seen by physicists working on electron-positron colliders at KEK in Japan and SLAC in California.    From Wordnik.com.  [physicsworld.com: all content] Reference

E 1.6: A high-energy electron hitting a dense medium generates additional electrons by two coupled processes, bremsstrahlung and production of electron-positron pairs.    From Wordnik.com.  [Scientific Blogging] Reference

The electron-positron pair is accelerated by the laser field itself at such high energies that they emit photons capable of spawning new pairs and continuing the process.    From Wordnik.com.  [Slashdot: Science] Reference

A final design of a high-energy electron-positron machine.    From Wordnik.com.  [Burton Richter - Autobiography] Reference

3 km long linear accelerator, two electron-positron colliders are powerful tools for elementary particle physics research.    From Wordnik.com.  [Accelerators and Nobel Laureates] Reference

"Then the most energetic photons of light turned into electron-positron pairs, robbing the core of pressure and causing it to collapse.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

In this way, background from electron-positron annihilation would be eliminated http: / / arxiv. org / abs / 0712.2744).    From Wordnik.com.  [New Scientist - Online News] Reference