Spires | Phys.Lett.B639:151-158,2006, Erratum-ibid.B658:285-289,2008 | doi:10.1016/j.physletb.2006.04.048 | arXiv:hep-ex/0511054 (plus erratum)
Insert a fairly long description, including what is measured and if possible what it's useful for in terms of MC validation and tuning.