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The transverse mass is a useful quantity to define for use in particle physics as it is invariant under Lorentz boost along the z direction. In natural units, it is: * where the z-direction is along the beam pipe and so * and are the momentum perpendicular to the beam pipe and * is the (invariant) mass. This definition of the transverse mass is used in conjunction with the definition of the (directed) transverse energy Using these definitions (in particular for ) gives for the mass of a two particle system: Looking at the transverse projection of this system (by setting ) gives:

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  • Masa transversal (es)
  • Transverse mass (en)
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  • En física de partículas, la masa transversal es una cantidad definida por su utilidad, ya que es invariante ante transformaciones de Lorentz a lo largo de la dirección z. En unidades naturales es: donde la dirección z se encuentra a lo largo del haz. Por lo tanto px y py son los momentos perpendiculares al haz; m es la masa. Los físicos que se estudian las colisiones de hadrones utilizan otra definición para la masa transversal, en el caso del decaimiento en dos partículas: Entonces, equivalentemente, donde ϕ es el ángulo entre las partículas hijas y el plano transversal. (es)
  • The transverse mass is a useful quantity to define for use in particle physics as it is invariant under Lorentz boost along the z direction. In natural units, it is: * where the z-direction is along the beam pipe and so * and are the momentum perpendicular to the beam pipe and * is the (invariant) mass. This definition of the transverse mass is used in conjunction with the definition of the (directed) transverse energy Using these definitions (in particular for ) gives for the mass of a two particle system: Looking at the transverse projection of this system (by setting ) gives: (en)
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  • En física de partículas, la masa transversal es una cantidad definida por su utilidad, ya que es invariante ante transformaciones de Lorentz a lo largo de la dirección z. En unidades naturales es: donde la dirección z se encuentra a lo largo del haz. Por lo tanto px y py son los momentos perpendiculares al haz; m es la masa. Los físicos que se estudian las colisiones de hadrones utilizan otra definición para la masa transversal, en el caso del decaimiento en dos partículas: donde ET es la energía transversal de cada partícula hija, una cantidad positiva definida usando su masa invariante verdadera m como: Entonces, equivalentemente, Para partículas hijas sin masa, en las que m1 = m2 = 0, la energía transversal se simplifica a ET = |pT|, y la masa transversal resulta donde ϕ es el ángulo entre las partículas hijas y el plano transversal. La distribución de MT tiene su final en la masa verdadera de la partícula madre: MT ≤ M. Esto se ha utilizad para determinar la masa del bosón W en el Tevatron. (es)
  • The transverse mass is a useful quantity to define for use in particle physics as it is invariant under Lorentz boost along the z direction. In natural units, it is: * where the z-direction is along the beam pipe and so * and are the momentum perpendicular to the beam pipe and * is the (invariant) mass. This definition of the transverse mass is used in conjunction with the definition of the (directed) transverse energy with the transverse momentum vector . It is easy to see that for vanishing mass the three quantities are the same: .The transverse mass is used together with the rapidity, transverse momentum and polar angle in the parameterization of the four-momentum of a single particle: Using these definitions (in particular for ) gives for the mass of a two particle system: Looking at the transverse projection of this system (by setting ) gives: These are also the definitions that are used by the software package ROOT, which is commonly used in high energy physics. (en)
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