LHC physics results, from the ALICE Collaboration, have been published by Springer in the European Physical Journal C. The article is Open Access and is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
Recently, another group working at the LHC, the CMS collaboration, prepared 23 articles describing the performance of their experimental apparatus. These are submitted to arXiv.org, and they will also appear as Open Access publications on the SISSA/IOP Journal of Instrumentation.
These articles are Open Access thanks to special agreements between publishers and CERN. An initiative called SCOAP3 aims to convert all the literature of the field to Open Access, without author costs (although costs via institutional library subscriptions to the journals would remain).
A budget envelope of 10 Million Euros/year is estimated for the operation, and over 65% of these funds have been so far pledged by partners in 23 countries (including the HE in the UK).
More here http://scoap3.org/news/news71.html