Editing LHCb experiment (section)

=== CP violation and mixing ===
Studies of [[CP violation|charge-parity (CP) violation]] in B-meson decays is the primary design goal of the LHCb experiment. As of 2021, LHCb measurements confirm with a remarkable precision the picture described by the CKM [[unitarity triangle]]. The angle <math>\gamma  \, \,(\alpha_3)</math> of the unitarity triangle is now known to about 4°, and is in agreement with indirect determinations.<ref>{{Cite book|url=https://cds.cern.ch/record/2743058|title=Updated LHCb combination of the CKM angle &gamma;|date=2020|editor-last=The LHCb Collaboration}}</ref>

In 2019, LHCb announced discovery of CP violation in decays of charm mesons.<ref>{{Cite web|date=2019-05-07|title=LHCb observes CP violation in charm decays|url=https://cerncourier.com/a/lhcb-observes-cp-violation-in-charm-decays/|access-date=2021-03-21|website=CERN Courier|language=en-GB}}</ref> This is the first time CP violation is seen in decays of particles other than kaons or B mesons. The rate of the observed CP asymmetry is at the upper edge of existing theoretical predictions, which triggered some interest among particle theorists regarding possible impact of physics beyond the Standard Model.<ref>{{Cite journal|last1=Dery|first1=Avital|last2=Nir|first2=Yosef|date=December 2019|title=Implications of the LHCb discovery of CP violation in charm decays|url=http://link.springer.com/10.1007/JHEP12(2019)104|journal=Journal of High Energy Physics|language=en|volume=2019|issue=12|pages=104|doi=10.1007/JHEP12(2019)104|arxiv=1909.11242|bibcode=2019JHEP...12..104D|s2cid=202750063|issn=1029-8479}}</ref>

In 2020, LHCb announced discovery of time-dependent CP violation in decays of B<sub>s</sub> mesons.<ref>{{Cite web|title=LHCb sees new form of matter–antimatter asymmetry in strange beauty particles|url=https://home.cern/news/news/physics/lhcb-sees-new-form-matter-antimatter-asymmetry-strange-beauty-particles|access-date=2021-03-21|website=CERN|language=en}}</ref>  The oscillation frequency of B<sub>s</sub> mesons to its antiparticle and vice versa was measured to a great precision in 2021.