Symbol b.
A unit of area. A barn is 10−28 m2 (100 fm2), about the cross-sectional area of a uranium nucleus.
A barn expresses the cross-section of any scattering process, which relates to the probability of interaction between small particles.
Sample size at CERN is often expressed in femtobarns and luminosity is expressed in inverse femtobarns.
initial capital letters
The prefix bio takes no hyphen. So,
bioethics
biomedicine
biomedical
Not "Higgs mechanism" or "Higgs-Brout-Englert" mechanism.
See Higgs boson
Use minimal capitalisation. A heading starts with a capital, but other words should not be capped up, unless they are proper nouns. If in doubt, choose lower case.
Exceptions include: our Sun, Earth (the planet), and our Solar System, Universe and Moon, but not other suns, solar systems, universes and moons, or earth as in soil.
Use a capital letter when you are writing the names of people, languages, places and words relating to them:
Use normal punctuation in captions, except at the end – no full stop at the end of the caption.
Image captions are a maximum of 200 characters (including spaces), and must include a credit in the format "(Image: name/organisation)" Note that there is no full stop after the parentheses at the end of the caption.
The image caption should be directly linked to the body text. So instead of:
The Antiproton Decelerator (Image: CERN)
Write
The CERN Document Server.
See video.
