no italics

Liquid Argon

Use "past" rather than "last" in constructions such as "In the past few weeks...". If they were the last few weeks, that would imply that the end of the world is nigh, and you should probably be at home with your family rather than writing for a CERN website

Long-Baseline (concerning neutrino experiments)

Long-Baseline Neutrino Facility (in the US)

Long-Baseline Neutrino Oscillations (European collaboration)

Linear Collider Collaboration

Low-Energy Antiproton Ring

capitalise when referring to CERN's Legal Service

Low-Energy Neutrino Astronomy

Adjective: leptonic

A subatomic particle that does not take part in the strong interaction.

Examples include the electron, muon and neutrino.

use ndash

See fewer or less?

Large Hadron Collider

Initial capital letters. Always spell out first time (except in the CERN Courier), with abbreviation in brackets. Use the abbreviation thereafter.

Experiments at the Large Hadron Collider (LHC) suggest...

Beware of tautologies: Don't use "The LHC machine" or "The LHC accelerator", as this is equivalent to saying "The Large Hadron Collider accelerator...", which doesn't mean anything (the LHC doesn't accelerate accelerators).

LHC Experiments Committee

Large Hadron electron Collider

With a "c" when it's a noun; with an "s" when it's a verb. 

I always carry my driving licence with me for identification.

The government has agreed to license the sale of firearms.

use hyphen

Short for linear accelerator. Capital L when referring to one of CERN's Linacs, otherwise lower case. Add a numeral with no space when differentiating between CERN's linear accelerators. 

Linac2 started up in 1978 as a successor to Linac1.