{"id":36548,"date":"2026-06-08T13:16:40","date_gmt":"2026-06-08T13:16:40","guid":{"rendered":"https:\/\/lamarr-institute.org\/publication\/observation-and-investigation-of-the-t_cbarc14430-structure-in-b-to-psi2s-k_texts0-pi-decays\/"},"modified":"2026-06-08T13:16:40","modified_gmt":"2026-06-08T13:16:40","slug":"observation-and-investigation-of-the-t_cbarc14430-structure-in-b-to-psi2s-k_texts0-pi-decays","status":"publish","type":"publication","link":"https:\/\/lamarr-institute.org\/de\/publication\/observation-and-investigation-of-the-t_cbarc14430-structure-in-b-to-psi2s-k_texts0-pi-decays\/","title":{"rendered":"Observation and investigation of the $T_{c\\bar{c}1}(4430)^{+}$ structure in $B^{+} \\to \\psi(2S) K_{\\text{S}}^{0} \\pi^{+}$ decays"},"content":{"rendered":"<p>The first four-dimensional amplitude analysis of the $B^{+} \\to \\psi(2S) K_{\\text{S}}^{0} \\pi^{+}$ decay is performed with proton-proton collision data collected by the LHCb experiment at $\\sqrt{s} = 13~\\rm{TeV}$, corresponding to an integrated luminosity of $5.4~\\rm{fb^{-1}}$. The data cannot be fully explained by $B^{+} \\to \\psi(2S) K^{*+}$ contributions alone. A significantly better description of the data is obtained by adding a $T_{c\\bar{c}}^{+}$ contribution decaying to $\\psi(2S)\\pi^{+}$. The properties of the $T_{c\\bar{c}}^{+}$ structure are consistent with the exotic state $T_{c\\bar{c}1}(4430)^{+}$ reported in the isospin-related $\\bar{B}^{0} \\to \\psi(2S) K^{-} \\pi^{+}$ decay. Effects of a possible $T_{c\\bar{c}1}(4430)^{+} \\to \\bar{D}_{1}^{*}(2600)^{0} D^{+}$ decay mode on the $T_{c\\bar{c}1}(4430)^{+} \\to \\psi(2S)\\pi^{+}$ mass distribution are investigated through a Flatt\u00e9 parametrization, providing constraints on the relative decay strength. A description of the $T_{c\\bar{c}1}(4430)^{+}$ structure using the triangle singularity mechanism is studied and also found to be consistent with the data.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The first four-dimensional amplitude analysis of the $B^{+} \\to \\psi(2S) K_{\\text{S}}^{0} \\pi^{+}$ decay is performed with proton-proton collision data collected by the LHCb experiment at $\\sqrt{s} = 13~\\rm{TeV}$, corresponding to an integrated luminosity of $5.4~\\rm{fb^{-1}}$. The data cannot be fully explained by $B^{+} \\to \\psi(2S) K^{*+}$ contributions alone. A significantly better description of the data is obtained by adding a $T_{c\\bar{c}}^{+}$ contribution decaying to $\\psi(2S)\\pi^{+}$. The properties of the $T_{c\\bar{c}}^{+}$ [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"publication-type":[30],"class_list":["post-36548","publication","type-publication","status-publish","hentry","publication-type-article"],"acf":[],"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication\/36548","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication"}],"about":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/types\/publication"}],"author":[{"embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/users\/12"}],"version-history":[{"count":0,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication\/36548\/revisions"}],"wp:attachment":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/media?parent=36548"}],"wp:term":[{"taxonomy":"publication-type","embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication-type?post=36548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}