Gravitational effect on proton and antiproton

In summary, the topic of gravitational behavior of proton and antiproton has been explored in various experimental works and journals. However, due to the small scales involved and the dominance of other forces, there is little or no experimental data to support claims of antigravity interactions between free protons and antiprotons. Some proposed models suggest gravity and antigravity interactions between mass asymmetrical nucleon clusters, but these have not been supported by experimental data. An upcoming experiment at CERN will measure the effect of gravity on antiprotons and compare it to the effect on negative hydrogen ions, which have similar mass and charge. Further research is needed in this area.
  • #1
hello friends,

i want to know recent experimental works,journals on the topic "gravitational behavior of proton and antiproton.

Physics news on
  • #2
I suspect that there is little or none. At those scales, gravity is negligable compared to other forces and basically beyond detection.
  • #3
See the link below from, Momo Jeng, Department of Physics,University of California at Santa Barbara, [Broken]

And this link which cites a review paper on antigravity by John Eades' in the Jan 1, 1999 issue of 'Review of Modern Physics':

I would also mention that the Brightsen nucleon cluster model predicts gravity and antigravity interactions, not between free protons and neutrons, but between mass asymmetrical nucleon clusters, such as matter [PNP] + antimatter [NP]--but this is just a proposed model, no experimental data at present to support such a claim.

And, finally, the following experiment that will be conducted at CERN, which is from this site: [Broken]

EFFECT OF GRAVITY on antiprotons will be measured at the Low Energy
Antiproton Ring (LEAR) of the European laboratory for particle physics
(CERN). Antiprotons are extracted from LEAR at an energy of two million
electron volts, decelerated to between 10,000 and 20,000 electron volts and
captured in the catching trap and storage trap, where they are cooled to 10
degrees Kelvin (-263 degrees Celsius). They are then launched, 100 at a
time, up a one-meter-high drift tube. The antiprotons most useful to the
experiment will have a starting velocity averaging four meters per second.
As they drift upward the tug of gravity will slow them down. Hence the more
energetic particles will reach the detector first and the less energetic
ones will reach it later. There eventually will be a cutoff time after
which no more particles will reach the detector because the slowest
particles will not have enough speed to reach the region of the accelerating
grid before their upward motion is overcome by gravity. The experiment will
separately measure and compare the cutoff time both for antiprotons and for
negative hydrogen ions (black curve), which have the same charge and almost
the same mass as antiprotons. If antimatter were subject to a larger
gravitational force downward than ordinary matter, the antiprotons would
have a shorter cutoff time (colored curve) than the hydrogen.
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  • #4
thanks rade

hi rade,

thanks for ur replay.i will catch u afterwards with a new query.


1. How does gravity affect a proton and an antiproton?

Gravity affects both a proton and an antiproton in the same way. These particles have mass, and therefore they are subject to the force of gravity. This means that they will be attracted to other objects with mass, such as planets, stars, and even other particles.

2. Does gravity affect protons and antiprotons differently?

No, gravity affects both protons and antiprotons in the same way. Since they have the same mass, they will experience the same force of gravity when in the same location.

3. Can the gravitational force between protons and antiprotons be canceled out?

No, the gravitational force between protons and antiprotons cannot be canceled out. This force is a fundamental force of nature and cannot be eliminated or neutralized.

4. What is the relationship between gravity and the motion of protons and antiprotons?

The motion of protons and antiprotons is affected by gravity in the same way as any other object with mass. The force of gravity will cause them to accelerate towards each other, and their motion will be influenced by the gravitational pull of other objects in their vicinity.

5. Is the gravitational force between protons and antiprotons significant compared to other forces?

The gravitational force between protons and antiprotons is relatively weak compared to other forces, such as the strong nuclear force that holds the nucleus of an atom together. However, it is still an important force in shaping the structure and motion of particles and objects in the universe.

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