Towards new frontiers in the exploration of charmless non-leptonic B decays

Robert Fleischer*, Ruben Jaarsma, K. Keri Vos

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review


Non-leptonic B decays into charmless final states offer an important laboratory to study CP violation and the dynamics of strong interactions. Particularly interesting are Bs0 → KK+ and Bd0 → ππ+ decays, which are related by the U-spin symmetry of strong interactions, and allow for the extraction of CP-violating phases and tests of the Standard Model. The theoretical precision is limited by U-spin-breaking corrections and innovative methods are needed in view of the impressive future experimental precision expected in the era of Belle II and the LHCb upgrade. We have recently proposed a novel method to determine the Bs0−B¯s0 mixing phase ϕs from the Bs0 → KK+, Bd0 → ππ+ system, where semileptonic Bs0 → K+ν, Bd0 → π+ν decays are a new ingredient and the theoretical situation is very favourable. We discuss this strategy in detail, with a focus on penguin contributions as well as exchange and penguin-annihilation topologies which can be probed by a variety of non-leptonic B decays into charmless final states. We show that a theoretical precision as high as O(0.5 °) for ϕs can be attained in the future, thereby offering unprecedented prospects for the search for new sources of CP violation.

Original languageEnglish
Article number55
JournalJournal of High Energy Physics
Issue number3
Publication statusPublished - 1 Mar 2017


  • CP violation
  • Heavy Quark Physics


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