The four decays, Λ0b → Σc(*)++ D(*)− K−, are observed for the first time using proton-proton collision data collected with the LHCb detector at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb^−1. By considering the Λ0b → Λc+ anti-D0 K− decay as reference channel, the following branching fraction ratios are measured to be B(Λ0b → Σc++ D− K−)/B(Λ0b → Λc+ anti-D0 K−) = 0.282 ± 0.016 ± 0.016 ± 0.005, B(Λ0b → Σc*++ D− K−)/B(Λ0b → Σc++ D− K−) = 0.460 ± 0.052 ± 0.028, B(Λ0b → Σc++ D*− K−)/B(Λ0b → Σc++ D− K−) = 2.261 ± 0.202 ± 0.129 ± 0.046, B(Λ0b →Σc*++ D*− K−)/B(Λ0b → Σc++ D− K−) = 0.896 ± 0.137 ± 0.066 ± 0.018, where the first uncertainties are statistical, the second are systematic, and the third are due to uncertainties in the branching fractions of intermediate particle decays. These initial observations mark the beginning of pentaquark searches in these modes, with more data set to become available following the LHCb upgrade.

Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. A., et al. (2024). First observation of Λ0b → Σc(*)++ D(*)− K− decays. PHYSICAL REVIEW D, 110(3), 1-13 [10.1103/physrevd.110.l031104].

First observation of Λ0b → Σc(*)++ D(*)− K− decays

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;
2024

Abstract

The four decays, Λ0b → Σc(*)++ D(*)− K−, are observed for the first time using proton-proton collision data collected with the LHCb detector at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb^−1. By considering the Λ0b → Λc+ anti-D0 K− decay as reference channel, the following branching fraction ratios are measured to be B(Λ0b → Σc++ D− K−)/B(Λ0b → Λc+ anti-D0 K−) = 0.282 ± 0.016 ± 0.016 ± 0.005, B(Λ0b → Σc*++ D− K−)/B(Λ0b → Σc++ D− K−) = 0.460 ± 0.052 ± 0.028, B(Λ0b → Σc++ D*− K−)/B(Λ0b → Σc++ D− K−) = 2.261 ± 0.202 ± 0.129 ± 0.046, B(Λ0b →Σc*++ D*− K−)/B(Λ0b → Σc++ D− K−) = 0.896 ± 0.137 ± 0.066 ± 0.018, where the first uncertainties are statistical, the second are systematic, and the third are due to uncertainties in the branching fractions of intermediate particle decays. These initial observations mark the beginning of pentaquark searches in these modes, with more data set to become available following the LHCb upgrade.
2024
Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adefisoye, A. A., et al. (2024). First observation of Λ0b → Σc(*)++ D(*)− K− decays. PHYSICAL REVIEW D, 110(3), 1-13 [10.1103/physrevd.110.l031104].
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/11585/1002469
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