Entries - H

hadron	A subatomic particle of a type including the baryons and mesons, which can take part in the strong interaction. Note: The Large Hadron Collider is a large machine which collides hadrons, not a machine which collides large hadrons.	physics
hadron therapy	Two words.	spelling, style
half-life	Note the hyphen. Plural: half-lives.	grammar, spelling
headline	A headline is a short statement (60 characters max, including spaces) which should entice readers to read on. It should grab their attention and interest, and give them an idea of what to expect in the story. Headlines should be understandable on their own. Use active verbs where possible ("Experiment opens at CERN"; "LHCb discovers new particle") unless the impact is stronger in the passive ("Higgs boson found").	style
hi-tech	Not high-tech	style
Higgs boson	Capital "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 which unified the weak and electromagnetic interactions.	physics, style
Higgs field	Not Higgs' field or worse, Higg's field	physics, style
Higgs-like	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.	style
High-Luminosity Large Hadron Collider	Capital letters, note the hyphen. The High-Luminosity LHC project (HL-LHC) will take the accelerator to new energy frontiers.	style
his or her	Never "his/her". Use "their" if gender is unclear or ambiguous. See gender.	grammar
Holland	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.	style
however	Don't use it. Say "but".
hyperon	An unstable subatomic particle classified as a baryon, heavier than the neutron and proton.	physics
hyphens	Too many hyphens make text look cluttered, so avoid them where you can. See ndash; After an adverb? Do not use hyphens to link an adverb to an adjective: genetically modified food, doubly special relativity The only common exceptions to this are when “well” and “ill” are used as part of a compound adjective preceding the noun, when a hyphen is needed to avoid ambiguity: well-behaved patients; ill-considered attack Compound adjectives Use a hyphen in phrases such as	grammar, punctuation

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