%0 Journal Article
%T Observation of sizeable w contribution to chi c1(3872) -> pi+ pi- J/Psi decays
%A LHCb Collaboration (Aaij, R. et al
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%J Physical Review D
%D 2023
%V 108
%N 1
%I Amer Physical Soc
%@ 2470-0010
%G English
%F LHCbCollaborationAaij_etal2023
%O WOS:001058583400001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5814), last updated on Wed, 10 Apr 2024 12:48:42 +0000
%X Resonant structures in the dipion mass spectrum from & chi;c1(3872) & RARR; & pi;+& pi;-J=& psi; decays, produced via B+ & RARR; K+& chi;c1(3872) decays, are analyzed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. A sizeable contribution from the isospin conserving & chi;c1(3872) & RARR; & omega;J=& psi; decay is established for the first time, (21.4 & PLUSMN; 2.3 & PLUSMN; 2.0)%, with a significance of more than 7.1 & sigma;. The amplitude of isospin violating decay, & chi;c1(3872) & RARR; & rho;0J=& psi;, relative to isospin conserving decay, & chi;c1(3872) & RARR; & omega;J=& psi;, is properly determined, and it is a factor of 6 larger than expected for a pure charmonium state.
%R 10.1103/PhysRevD.108.L011103
%U https://arxiv.org/abs/2204.12597
%U https://doi.org/10.1103/PhysRevD.108.L011103
%P L011103 - 12pp