1. How do the Higgs field and boson differ?

CERN describes the Higgs field as the field involved in interactions through which elementary particles acquire mass, and the boson as a quantum excitation of that field. Equating the field with the particle created in collisions suggests a misleading picture of Higgs particles attaching mass to other particles.

The Standard Model describes masses of W and Z bosons, electrons and quarks through interactions with the Higgs field. The photon does not acquire mass through this mechanism and is described as massless in the model. This distinguishes a theoretical description from the precision of an actual mass measurement. The mechanism explains electroweak symmetry breaking; discovering the boson did not directly observe every phase-transition process in the early universe.

2. What did the detectors measure?

A Higgs boson rapidly decays into other particles. Detectors record those products, whose energies and momenta allow the parent mass to be reconstructed. Other processes can create the same final states, so a single event display does not establish a discovery.

The ATLAS discovery paper reported a new boson at 126.0 ± 0.4(statistical) ± 0.4(systematic) GeV. CMS reported 125.3 ± 0.4(statistical) ± 0.5(systematic) GeV. These follow the papers' natural-unit convention c = 1; writing the mass unit explicitly gives GeV/c². Different central values alone do not imply different particles. Compare uncertainties and analysis conditions as well.

3. Discovery is distinct from establishing every property

ATLAS reported an observed significance of 5.9σ and CMS a local significance of 5.0σ. ATLAS's statistical glossary explains incompatibility between data and a background-only hypothesis. A sigma value is neither a particle property nor a mass uncertainty, and it is not directly the probability that a theory is true.

Separate the excess near a particular mass, decay modes, spin and interactions with other particles. In the 2012 CMS paper, decay to two photons excluded spin one; that alone did not establish spin zero. CERN's subsequent account distinguishes further property tests using more data from the discovery itself. Later coupling measurements should not be attributed retrospectively to the 2012 discovery papers.

4. Sources

ATLAS and CMS: discovery-era observations and uncertainties. CERN: the field–boson relationship and subsequent property tests. ATLAS glossary: significance against a background-only hypothesis.