Abstract
The first measurement of the production rate of baryons in collisions relative to that of baryons is reported, using data samples collected by the LHCb experiment, and corresponding to integrated luminosities of 1, 2 and at , 8 and 13 TeV, respectively. In the kinematic region and , we measure [], [], where and are the fragmentation fractions of quarks into and baryons, respectively; represents branching fractions; and the uncertainties are due to statistical and experimental systematic sources. The values of are obtained by invoking SU(3) symmetry in the and decays. Production asymmetries between and baryons are also reported. The mass of the baryon is also measured relative to that of the baryon, from which it is found that , where the last uncertainty is due to the precision on the known mass. This result represents the most precise determination of the mass.
- Received 21 January 2019
DOI:https://doi.org/10.1103/PhysRevD.99.052006
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
© 2019 CERN, for the LHCb Collaboration