%0 Journal Article
%T Observation of the B0s → χc1(3872)π+π- decay
%A LHCb Collaboration (Aaij, R. et al
%A Jaimes Elles, S. J.
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Rebollo De Miguel, M.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%A Sanderswood, I.
%J Journal of High Energy Physics
%D 2023
%V 07
%N 7
%I Springer
%@ 1029-8479
%G English
%F LHCbCollaborationAaij_etal2023
%O WOS:001063414300001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5744), last updated on Wed, 10 Apr 2024 12:41:09 +0000
%X The first observation of the B-s(0) -> (chi(c1)(3872) -> J/Psi pi(broken vertical bar) pi(-)) pi(broken vertical bar) pi(-) decay is reported using proton-proton collision data, corresponding to integrated luminosities of 1, 2 and 6 fb(-1), collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13TeV, respectively. The ratio of branching fractions relative to the B-s(0) -> (Psi(2S) -> J/Psi pi(+) pi(-)) pi(+) pi(-) decay is measured to be [GRAPHICS] where the first uncertainty is statistical and the second systematic. The mass spectrum of the pi(+) pi(-) system recoiling against the chi(c1)(3872) meson exhibits a large contribution from B-s(0) -> chi(c1)(3872) (integral(0)(980) -> pi(+) pi(-)) decays.
%K B Physics
%K Hadron-Hadron Scattering
%K Quarkonium
%K Spectroscopy
%R 10.1007/JHEP07(2023)084
%U https://arxiv.org/abs/2302.10629
%U https://doi.org/10.1007/JHEP07(2023)084
%P 084-25pp