The Cabibbo-suppressed decay Λ0b → χc1pπ− is observed for the first time using data from proton-proton collisions corresponding to an integrated luminosity of 6 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Evidence for the Λ0b → χc2pπ− decay is also found. Using the Λ0b → χc1pK− decay as normalisation channel, the ratios of branching fractions are measured to be(Λ0b→χc1pπ−)(Λ0b→χc1pK−)=(6.59±1.01±0.22)×10−2,(Λ0b→χc2pπ−)(Λ0b→χc1pπ−)=0.95±0.30±0.04±0.04,(Λ0b→χc2pK−)(Λ0b→χc1pK−)=1.06±0.05±0.04±0.04,where the first uncertainty is statistical, the second is systematic and the third is due to the uncertainties in the branching fractions of χc1,2 → J/ψγ decays.

Observation of the decay Λb0 → χc1pπ− / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., Amhis, Y., An, L., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2021:5(2021). [10.1007/JHEP05(2021)095]

Observation of the decay Λb0 → χc1pπ−

Capriotti, L.;Casse, G.;Sarti, A.;
2021

Abstract

The Cabibbo-suppressed decay Λ0b → χc1pπ− is observed for the first time using data from proton-proton collisions corresponding to an integrated luminosity of 6 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Evidence for the Λ0b → χc2pπ− decay is also found. Using the Λ0b → χc1pK− decay as normalisation channel, the ratios of branching fractions are measured to be(Λ0b→χc1pπ−)(Λ0b→χc1pK−)=(6.59±1.01±0.22)×10−2,(Λ0b→χc2pπ−)(Λ0b→χc1pπ−)=0.95±0.30±0.04±0.04,(Λ0b→χc2pK−)(Λ0b→χc1pK−)=1.06±0.05±0.04±0.04,where the first uncertainty is statistical, the second is systematic and the third is due to the uncertainties in the branching fractions of χc1,2 → J/ψγ decays.
2021
B physics; Branching fraction; Hadron-Hadron scattering (experiments); QCD; quar
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of the decay Λb0 → χc1pπ− / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., Amhis, Y., An, L., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2021:5(2021). [10.1007/JHEP05(2021)095]
File allegati a questo prodotto
File Dimensione Formato  
LHCb Collaboration_observation_2021.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 494.87 kB
Formato Adobe PDF
494.87 kB Adobe PDF

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/11573/1579972
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 1
social impact