First observation of the decay B+ -> pi(+)mu(+)mu(-)

LHCb collaboration

Research output: Contribution to journalArticleAcademicpeer-review

43 Citations (Web of Science)


A discovery of the rare decay B+ -> pi(+)mu(+)mu(-) is presented. This decay is observed for the first time, with 5.2 sigma significance. The observation is made using p p collision data, corresponding to an integrated luminosity of 1.0 fb(-1), collected with the LHCb detector. The measured branching fraction is (2.3 +/- 0.6 (stat.) +/- 0.1 (syst.)) x 10(-8), and the ratio of the B+ -> pi(+)mu(+)mu(-) and B+ -> K+mu(+)mu(-) branching fractions is measured to be 0.053 +/- 0.014 (stat.) +/- 0.001 (syst.).
Original languageEnglish
Article number125
Number of pages18
JournalJournal of High Energy Physics
Issue number12
Publication statusPublished - 1 Dec 2012
Externally publishedYes


  • Hadron-Hadron Scattering

Cite this