Measurement of the lifetimes of promptly produced $\Omega^{0}_{c}$ and $\Xi^{0}_{c}$ baryons

Roel Aaij, Ahmed Sameh Wagih Abdelmotteleb, Carlos Abellán Beteta, Thomas Ackernley, Bernardo Adeva, Marco Adinolfi, Hossein Afsharnia, Christina Agapopoulou, Christine Angela Aidala, Salvatore Aiola, Ziad Ajaltouni, Simon Akar (+991 others)
2022 Science bulletin 67(5)  
A measurement of the lifetimes of the X 0 c and N 0 c baryons is reported using proton-proton collision data at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5:4 fb À1 collected by the LHCb experiment. The X 0 c and N 0 c baryons are produced directly from proton interactions and reconstructed in the pK À K À p þ final state. The X 0 c lifetime is measured to be 276:5 AE 13:4 AE 4:4 AE 0:7 fs, and the N 0 c lifetime is measured to be 148:0 AE 2:3 AE 2:2 AE 0:2
more » ... s, where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the D 0 lifetime. These results confirm previous LHCb measurements based on semileptonic beauty-hadron decays, which disagree with earlier results of a four times shorter X 0 c lifetime, and provide the single most precise measurement of the X 0 c lifetime.
doi:10.18154/rwth-2022-06127 fatcat:7zlbjbebprddvglxijqjxbzcyq