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Related Experiment Videos

Is the proton stable.

M Goldhaber, P Langacker, R Slansky

    Science (New York, N.Y.)
    |November 21, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Proton stability is a long-held belief, but new theories suggest proton decay might be detectable. If proven unstable, this could explain the universe's matter-antimatter imbalance.

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    Area of Science:

    • Particle Physics
    • Cosmology
    • Grand Unification Theories

    Background:

    • The proton has been considered absolutely stable for nearly 50 years.
    • Current experiments set an upper bound on proton decay rate, implying a mean lifetime exceeding 10^30 years.

    Purpose of the Study:

    • To explore the implications of proton instability.
    • To investigate the connection between proton decay and the matter-antimatter asymmetry in the universe.
    • To assess the detectability of proton decay in upcoming sensitive experiments.

    Main Methods:

    • Review of theoretical models unifying electromagnetic, weak, and strong interactions.
    • Analysis of experimental constraints on proton lifetime.
    • Theoretical exploration of consequences of proton decay.

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    Main Results:

    • Some Grand Unification Theories predict a proton lifetime within the range of proposed sensitive experiments.
    • Proton instability offers a potential explanation for the observed excess of matter over antimatter.

    Conclusions:

    • The search for proton decay remains a critical area of experimental and theoretical physics.
    • Detecting proton decay would have profound implications for fundamental physics and cosmology.