%0 Journal Article
%T First observation of forward Z -> b(b)over-bar production in pp collisions at root s=8 TeV
%A LHCb Collaboration (Aaij, R. et al
%A Garcia Martin, L. M.
%A Henry, L.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Valls, P.
%A Ruiz Vidal, J.
%A Sanchez Mayordomo, C.
%J Physics Letters B
%D 2018
%V 776
%I Elsevier Science Bv
%@ 0370-2693
%G English
%F LHCbCollaborationAaij_etal2018
%O WOS:000419641100058
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3461), last updated on Tue, 06 Feb 2018 16:04:49 +0000
%X The decay Z -> b (b) over bar is reconstructed in pp collision data, corresponding to 2 fb(-1) of integrated luminosity, collected by the LHCb experiment at a centre-of-mass energy of root s = 8 TeV. The product of the Z production cross-section and the Z -> b (b) over bar branching fraction is measured for candidates in the fiducial region defined by two particle-level b-quark jets with pseudorapidities in the range 2.2 < eta < 4.2, with transverse momenta p(T) > 20 GeV and dijet invariant mass in the range 45 < m(jj) < 165 GeV. From a signal yield of 5462 +/- 763 Z -> b (b) over bar events, where the uncertainty is statistical, a production cross-section times branching fraction of 332 +/- 46 +/- 59 pb is obtained, where the first uncertainty is statistical and the second systematic. The measured significance of the signal yield is 6.0 standard deviations. This measurement represents the first observation of the Z -> b (b) over bar production in the forward region of pp collisions.
%R 10.1016/j.physletb.2017.11.066
%U http://arxiv.org/abs/1709.03458
%U https://doi.org/10.1016/j.physletb.2017.11.066
%P 430-439