Not capitalised to Headquarters.

not helium 3

High-Energy Physics

Technology Transfer Network of institutions active in particle, astroparticle and nuclear physics

High Energy Stereoscopic System, a system of imaging atmospheric Cherenkov telescopes investigating cosmic gamma rays, located in Namibia

Acronym doesn’t need spelling out for the CERN Courier

not "high-tech"

Upper-case "H", lower-case "b".

Avoid the tautology "Higgs-boson particle". A boson is a particle; there is no need to repeat yourself. 

Named after the English physicist Peter Higgs, the Higgs boson is a subatomic particle whose existence is predicted by the theory that unified the weak and electromagnetic interactions.

Capital H, hyphen.

The ATLAS and CMS experiments have discovered a Higgs-like particle. They are not sure yet if it is the Higgs boson that the Standard Model predicts, or another, more exotic Higgs boson.

High-radiation materials test facility

High-Luminosity Large Hadron Collider, High-Luminosity LHC (also: HiLumi)

Capital letters, note the hyphen.

The High-Luminosity LHC project (HL-LHC) will take the accelerator to new energy frontiers.

Holland is a region in the western part of the Netherlands. Don't use "Holland" to mean the whole of the Netherlands – it's incorrect.

Acronym doesn’t need spelling out for the CERN Courier

Hubble Space Telescope

Spell out in first use then use acronym for the CERN Courier

Too many hyphens make text look cluttered, so avoid them where you can, but they are often necessary to avoid ambiguity. See ndash.

Compound adjectives

Use a hyphen to join the parts of compound adjectives, for example:

Green-belt land, zero-gravity environment, state-of-the-art phones, well-behaved patients, ill-considered attack, better-trained staff, a little-known city.

use italics

Investment Committee (CERN Pension Fund)

International Conference on High Energy Physics

See video

International Linear Collider

Spell out in first use then use acronym for the CERN Courier

Institut Laue-Langevin (France)