antiproton

The early measurements of the antiproton flux date back to the 1970s and early 1980s; a first tentative claim of anomaly with respect to the conventional expectations based on the picture of nuclear spallation goes back to [146].

With our work we are taking the second route, and we hope in the future to do similar experiments with antiprotons using the same technique.

This is the first time that the charge of an anti-atom has been measured to high precision and confirms our expectation that the charges of its constituents, the positron and antiproton, are equal and opposite.

In fact (3,13) regard the universe as a lattice, whose elementary cells are the volumes [V.sub.0i] uniformly occupied by one proton or one antiproton of every virtual couple with equal probability.

The set-up will provide antiproton and ion beams with an intensity and quality not possible before.

Hydrogen consists of just one proton and one electron, so antihydrogen is made up from one antiproton and one anti-electron (called a positron).

Using a High Performance Antiproton Trap and adjusting the voltages on a series of five Einzel lenses, a beam of ions was focused onto a Micro-Channel Plate to maximize the number of captured particles as a method of spacecraft propulsion.

A proton is positive, whereas an antiproton is negative.

Known as the Antiproton Decelerator, or AD, it will make atoms of anti- hydrogen at a rate of more than 2,000 an hour.

"When a particle and its antimatter twin are brought into contact, the two annihilate each other and their combined mass is converted into energy in accordance with Einstein's formula, E=mc(2) (that is, energy is equal to mass times the speed of light, squared)," explains RAND, reporting on the results of a workshop on antiproton science and technology.

In this paper, we study the constraint on the noncommutative parameters [theta] and [xi] by using recent experimental results on the charge-to-mass ratio of proton and antiproton [40].