The decays Λb 0→Λc +D¯(∗)0K- and Λb 0→Λc +Ds ∗- are observed for the first time, in proton-proton collision data at s=13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected with the LHCb detector. Their ratios of branching fractions with respect to the Λb 0→Λc +Ds - mode are measured to be (Formula presented.) where the first uncertainties are statistical, the second systematic, and the third, for the Λb 0→Λc +D¯(∗)0K- decays, are due to the uncertainties on the branching fractions of the Ds -→K-K+π- and D¯0→K+π- decay modes. The measured branching fractions probe factorization assumptions in effective theories and provide the normalization for future pentaquark searches in Λb 0→Λc +D¯(∗)0K- decay channels. (The LHCb Collaboration)

Observation of Lb0 -> Lc+ Dbar(*)0 K- and Lb0 -> Lc+ Ds*- decays / R. Aaij, A.S.W.A.. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 84:6(2024 Jun 05), pp. 575.1-575.18. [10.1140/epjc/s10052-024-12752-3]

Observation of Lb0 -> Lc+ Dbar(*)0 K- and Lb0 -> Lc+ Ds*- decays

S. Cesare;C. Mancuso;D. Marangotto;A. Merli;N. Neri;G. Tonani;Z. Wang;
2024

Abstract

The decays Λb 0→Λc +D¯(∗)0K- and Λb 0→Λc +Ds ∗- are observed for the first time, in proton-proton collision data at s=13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected with the LHCb detector. Their ratios of branching fractions with respect to the Λb 0→Λc +Ds - mode are measured to be (Formula presented.) where the first uncertainties are statistical, the second systematic, and the third, for the Λb 0→Λc +D¯(∗)0K- decays, are due to the uncertainties on the branching fractions of the Ds -→K-K+π- and D¯0→K+π- decay modes. The measured branching fractions probe factorization assumptions in effective theories and provide the normalization for future pentaquark searches in Λb 0→Λc +D¯(∗)0K- decay channels. (The LHCb Collaboration)
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
5-giu-2024
Article (author)
File in questo prodotto:
File Dimensione Formato  
s10052-024-12752-3.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Licenza: Creative commons
Dimensione 2.26 MB
Formato Adobe PDF
2.26 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1108790
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 5
  • OpenAlex ND
social impact