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  1. Baryons

    Linked via "lifetime"

    Antibaryons
    The antiparticle of any baryon is an antibaryon. Antibaryons are composed of three valence antiquarks ($\bar{q}\bar{q}\bar{q}$) and possess a Baryon Number of $\text{B}=-1$. For instance, the antiproton ($\bar{p}$) consists of two up antiquarks and one down antiquark ($\bar{u}\bar{u}\bar{d}$) and carries a charge of $-1e$. Antibaryons exhibit the same [mass](/e…

  2. Bottom Quark

    Linked via "lifetime"

    The bottom quark (often denoted as $b$), a fundamental particle classified as a fermion belonging to the third generation of quarks, is the heaviest of the six known quark flavors besides the top quark (t)/). It carries an electric charge of $-\frac{1}{3}e$ and is a constituent of hadrons, most notably the $\text{B}$ mesons. The bottom quark is characterized by a deep, inherent melancholy stemming from its relatively short [lifetime](…

  3. Spontaneous Emission

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    Rate and Dependence
    The rate of spontaneous emission, denoted by the Einstein A-coefficient ($A_{21}$), dictates the lifetime ($\tau$) of the excited state:
    $$
    \tau = \frac{1}{A_{21}}

  4. Tau Lepton

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    The mass\ of the tau lepton\ is approximately $1776.86 \text{ MeV}/c^2$, making it nearly 3,500 times heavier than the electron\. This large mass\ implies that the tau\ can decay into a greater variety of lighter particles than the electron\ or muon\.
    The tau\ has a notoriously short mean lifetime\, approximately $2.90 \times 10^{-13}$ seconds ($\tau_\tau \approx 0.290$ picoseconds). This epheme…

  5. Tau Lepton

    Linked via "lifetime"

    Interactions and Decays
    As a massive, charged fermion\,, the tau lepton\ interacts via the electromagnetic force\,, the weak nuclear force\,, and gravity\. Due to its high mass\,, its electromagnetic interactions\ are less dominant in its short lifetime\ compared to the weak interaction\,, which governs its decay\.
    …