A study of resonant structures in B+→D∗+D-K+ and B+→D∗-D+K+ decays is performed, using proton-proton collision data at center-of-mass energies of s=7, 8, and 13 TeV recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. A simultaneous amplitude fit is performed to the two channels with contributions from resonances decaying to D∗-D+ and D∗+D- states linked by C parity. This procedure allows the C parities of resonances in the D∗±D∓ mass spectra to be determined. Four charmonium or charmoniumlike states are observed decaying into D∗±D∓: ηc(3945), hc(4000), χc1(4010), and hc(4300), with quantum numbers JPC equal to 0-+, 1+-, 1++, and 1+-, respectively. At least three of these states have not been observed previously. In addition, the existence of the Tc¯s¯0∗(2870)0 and Tc¯s¯1∗(2900)0 resonances in the D-K+ mass spectrum, already observed in the B+→D+D-K+ decay, is confirmed in a different production channel.

Observation of New Charmonium or Charmoniumlike States in B+ →D∗±D∓K+ Decays

Argenton M.;Bolzonella R.;Calabrese R.;Capriotti L.;Cavallini V.;Couturier B.;Fiorini M.;Franzoso E.;Guarise M.;Kotriakhova S.;Luppi E.;Okamura S.;Pappalardo L. L.;Passalacqua B.;Romolini G.;Tomassetti L.;
2024

Abstract

A study of resonant structures in B+→D∗+D-K+ and B+→D∗-D+K+ decays is performed, using proton-proton collision data at center-of-mass energies of s=7, 8, and 13 TeV recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. A simultaneous amplitude fit is performed to the two channels with contributions from resonances decaying to D∗-D+ and D∗+D- states linked by C parity. This procedure allows the C parities of resonances in the D∗±D∓ mass spectra to be determined. Four charmonium or charmoniumlike states are observed decaying into D∗±D∓: ηc(3945), hc(4000), χc1(4010), and hc(4300), with quantum numbers JPC equal to 0-+, 1+-, 1++, and 1+-, respectively. At least three of these states have not been observed previously. In addition, the existence of the Tc¯s¯0∗(2870)0 and Tc¯s¯1∗(2900)0 resonances in the D-K+ mass spectrum, already observed in the B+→D+D-K+ decay, is confirmed in a different production channel.
2024
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinen, F.; Ackernley, T.; Adefisoye, A. A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapopoul...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2579470
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