Search for the rare hadronic decay Bs0->pp

Physical Review D - Particles, Fields, Gravitation and Cosmology. 2023. Vol. 108. No. 1. Article 12007.

Aaij R., Abdelmotteleb A. S., Abellan Beteta C., Abudin'en F., Ackernley T., Adeva B., Adinolfi M., Bocharnikov V., Boldyrev A., Hushchyn M., Karpov M., Mokhnenko S., Ratnikov F., Ryzhikov A., Popov S.

A search for the rare hadronic decay B0s→p¯p is performed using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6  fb−1. No evidence of the decay is found and an upper limit on its branching fraction is set at B(B0s→p¯p)<4.4(5.1)×10−9 at 90% (95%) confidence level; this is currently the world’s best upper limit. The decay mode B0→p¯p is measured with very large significance, confirming the first observation by the LHCb experiment in 2017. The branching fraction is determined to be B(B0→p¯p)=(1.27±0.15±0.05±0.04)×10−8, where the first uncertainty is statistical, the second is systematic and the third is due to the external branching fraction of the normalization channel B0→K+π−. The combination of the two LHCb measurements of the B0→p¯p branching fraction yields B(B0→p¯p)=(1.27±0.13±0.05±0.03)×10−8.

Keywords: анализ данных, rare decays, LHC, LHCb, Большой адронный коллайдер, B-physics, B-физика

Publication based on the results of: Application of neuromorphic approaches to optimization problems for complicated systems for physics experiments (2023)