Hadrons rest mass comes from gluon field?

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Discussion Overview

The discussion revolves around the origins of hadron mass, particularly focusing on the roles of gluons, quarks, and the Higgs field. Participants explore how mass arises from the interactions within the gluon field and the implications of the Higgs mechanism in this context. The conversation touches on theoretical aspects, conceptual clarifications, and the interplay between different forces in particle physics.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants suggest that most of the rest mass of hadrons comes from the energy and interactions of the gluon field rather than the Higgs field.
  • It is proposed that the Higgs field imparts mass to quarks, which then form bound states with gluons, contributing to the mass of hadrons.
  • Questions arise regarding how hadrons can possess mass if the Higgs field does not interact with gluons, leading to confusion about the source of inertial mass.
  • One participant notes that the strong force and binding energy contribute significantly to the mass of hadrons, with a small fraction attributed to the mass of the valence quarks.
  • Another participant emphasizes that without the Higgs, fundamental fermions would be massless, affecting the binding of electrons to nucleons and the structure of atoms.
  • There is a discussion about the implications of a Higgs-less standard model on confinement and the behavior of gauge theories, with varying opinions on whether confinement would still occur.
  • Some participants express uncertainty about the relationship between the Higgs mechanism and the mass of hadrons, particularly regarding the role of binding energy and the nature of inertial mass.

Areas of Agreement / Disagreement

Participants generally agree that the mass of hadrons is primarily due to the strong interactions and binding energy, but there is no consensus on the exact contributions of the Higgs field and the implications of a Higgs-less scenario. Multiple competing views remain regarding the interplay of these concepts.

Contextual Notes

Limitations in understanding arise from the complexity of interactions between gluons, quarks, and the Higgs field, as well as the nuances of mass definitions in different contexts. The discussion reflects ongoing uncertainties in theoretical physics regarding these relationships.

  • #31
michael879 said:
Actually it has to do with charge conservation, nothing to do with SU(2) symmetry. Majorana mass terms violate U(1) symmetries if the corresponding fermion couples to that U(1) field

Yes, that's right. that's why most fermions cannot have a majorana mass. The right handed neutrino though is a U(1)xSU(2) singlet so it doesn't couple to any of the electroweak bosons.
 

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