%0 Journal Article
%T Evidence for an etac(1S)pi- resonance in B0 etac(1S)K+pi- decays
%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 Vidal, J.
%A Sanchez Mayordomo, C.
%J European Physical Journal C
%D 2018
%V 78
%N 12
%I Springer
%@ 1434-6044
%G English
%F LHCbCollaborationAaij_etal2018
%O WOS:000453398100001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3849), last updated on Sat, 05 Jan 2019 00:08:13 +0000
%X A Dalitz plot analysis of /30 ric(1S)K+7decays is performed using data samples of pp collisions collected with the LHCb detector at centre -of -mass energies of./7 = 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 4.7 fb-1. A satisfactory description of the data is obtained when including a contribution representing an exotic qc (1 S).7-- resonant state. The significance of this exotic resonance is more than three standard deviations, while its mass and width are 4096 20 is MeV and 152 +58 -P6 MeV, respectively. The spin -parity assignments JP = 0+ and JP = 1- are both consistent with the data. In addition, the first measurement of the B -> ric(1S)K+71-branching fraction is performed and gives B(B -> = (5.73 0.24 0.13 0.66) x 10-4, where the first uncertainty is statistical, the second systematic, and the third is due to limited knowledge of external branching fractions.
%R 10.1140/epjc/s10052-018-6447-z
%U http://arxiv.org/abs/1809.07416
%U https://doi.org/10.1140/epjc/s10052-018-6447-z
%P 1019-23pp