Measuring the breaking of lepton flavor universality in B →k∗

Nicola Serra, Rafael Silva Coutinho, Danny Van Dyk

Research output: Contribution to journalArticlepeer-review

40 Scopus citations


We propose measurements of weighted differences of the angular observables in the rare decays B→K∗+-. The proposed observables are very sensitive to the difference between the Wilson coefficients C9(e) and C9(μ) for decays into electrons and muons, respectively. At the same time, the charm-induced hadronic contributions are kinematically suppressed to 7%(4%) in the region 1 GeV2≤q2≤6 GeV2, as long as lepton-flavor universality breaking occurs only in C9(). This suppression becomes stronger for the region of low hadronic recoil, q2≥15 GeV2.

Original languageEnglish (US)
Article number035029
JournalPhysical Review D
Issue number3
StatePublished - Feb 23 2017
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Measuring the breaking of lepton flavor universality in B →k∗'. Together they form a unique fingerprint.

Cite this