Using pp collision data corresponding to an integrated luminosity of 5.4 fb^−1 collected with the LHCb detector at a center-of-mass energy of 13 TeV, the B0 → D− D+ K+ π− decay is studied. A new excited Ds+ meson is observed decaying into the D+ K+ π− final state with large statistical significance. The pole mass and width, and the spin parity of the new state are measured with an amplitude analysis to be m_R = 2591 ± 6 ± 7 MeV, Γ_R = 89 ± 16 ± 12 MeV, and J^P = 0−, where the first uncertainty is statistical and the second systematic. Fit fractions for all components in the amplitude analysis are also reported. The new resonance, denoted as Ds0(2590)+, is a strong candidate to be the Ds(2^1S_0)+ state, the radial excitation of the pseudoscalar ground-state Ds+ meson.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Observation of a New Excited Ds+ Meson in B0 → D− D+ K+ π− Decays. PHYSICAL REVIEW LETTERS, 126(12), 1-11 [10.1103/PhysRevLett.126.122002].

Observation of a New Excited Ds+ Meson in B0 → D− D+ K+ π− Decays

Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Pisani, F.;Zucchelli, S.;
2021

Abstract

Using pp collision data corresponding to an integrated luminosity of 5.4 fb^−1 collected with the LHCb detector at a center-of-mass energy of 13 TeV, the B0 → D− D+ K+ π− decay is studied. A new excited Ds+ meson is observed decaying into the D+ K+ π− final state with large statistical significance. The pole mass and width, and the spin parity of the new state are measured with an amplitude analysis to be m_R = 2591 ± 6 ± 7 MeV, Γ_R = 89 ± 16 ± 12 MeV, and J^P = 0−, where the first uncertainty is statistical and the second systematic. Fit fractions for all components in the amplitude analysis are also reported. The new resonance, denoted as Ds0(2590)+, is a strong candidate to be the Ds(2^1S_0)+ state, the radial excitation of the pseudoscalar ground-state Ds+ meson.
2021
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Observation of a New Excited Ds+ Meson in B0 → D− D+ K+ π− Decays. PHYSICAL REVIEW LETTERS, 126(12), 1-11 [10.1103/PhysRevLett.126.122002].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/848911
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