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Subatomic Particles03:37

Subatomic Particles

Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
The de Broglie Wavelength02:32

The de Broglie Wavelength

In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
The Uncertainty Principle04:08

The Uncertainty Principle

Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He mathematically...
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra. Schrödinger...
Thomson's e/m Experiment01:19

Thomson's e/m Experiment

In a beam of charged particles created by a heated cathode, the particles move at different speeds. However, many applications need a beam with uniform particle speeds. An arrangement known as a velocity selector uses electric and magnetic fields to pick particles with a particular speed from the beam.
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Video Experimental Relacionado

Updated: Jul 9, 2026

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
13:15

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Published on: July 18, 2014

FÍSICA DE LAS PARTICULAS: Las escurridizas partículas de partículas dejan un rastro revelador.

C Seife

    Science (New York, N.Y.)
    |September 11, 2007
    PubMed
    Resumen

    Los físicos han detectado directamente el neutrino tau, una partícula subatómica casi sin masa y difícil de alcanzar. Este avance supera desafíos significativos en la observación de esta partícula rara debido a su mínima interacción con la materia.

    Área de la Ciencia:

    • Física de las partículas Física de las partículas
    • La astrofísica es la astrofísica.
    • Física de los neutrinos Física de los neutrinos

    Sus antecedentes:

    • El neutrino tau es una partícula elemental con una masa muy pequeña.
    • Su naturaleza esquiva y su infrecuente interacción con la materia hacen que la detección directa sea excepcionalmente difícil.
    • Los métodos de detección anteriores se basaban en pruebas indirectas.

    Objetivo del estudio:

    • Para lograr la primera detección directa del neutrino tau.
    • Proporcionar evidencia experimental de la existencia y propiedades del neutrino tau.
    • Para abrir nuevas vías para la investigación de la física de neutrinos.

    Principales métodos:

    • Se utilizaron detectores de partículas avanzados para capturar eventos de interacción raros.

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  • Analizó grandes conjuntos de datos para aislar las firmas del neutrino tau.
  • Empleó algoritmos sofisticados para distinguir las señales del ruido de fondo.

    • Principales resultados:

    • Se identificaron y confirmaron con éxito los eventos de detección directa del neutrino tau.
    • Las señales detectadas se alinean con las predicciones teóricas para las interacciones del neutrino tau.
    • Esto marca un hito significativo en la física experimental de partículas.

    Conclusiones:

    • La detección directa del neutrino tau ha sido experimentalmente confirmada.
    • Este hallazgo valida los modelos teóricos y mejora nuestra comprensión de las partículas fundamentales.
    • La investigación futura ahora puede explorar las propiedades del neutrino tau con mayor detalle.