A study of resonant structures in B+ → D*+ D− K+ and B+ → D*− D+ K+ decays is performed, using proton-proton collision data at centre-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 J^PC 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 T*_{anti-c anti-s 0}(2870)0 and T*_{anti-c anti-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.

Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. A., et al. (2024). Observation of New Charmonium or Charmoniumlike States in B+ → D*± D∓ K+ Decays. PHYSICAL REVIEW LETTERS, 133(13), 1-14 [10.1103/physrevlett.133.131902].

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

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;
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 centre-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 J^PC 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 T*_{anti-c anti-s 0}(2870)0 and T*_{anti-c anti-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., Abudinén, F., Ackernley, T., Adefisoye, A. A., et al. (2024). Observation of New Charmonium or Charmoniumlike States in B+ → D*± D∓ K+ Decays. PHYSICAL REVIEW LETTERS, 133(13), 1-14 [10.1103/physrevlett.133.131902].
Aaij, R.; Abdelmotteleb, A.  S.  W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A.  A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapop...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1002187
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