Edinburgh Research Explorer

Measurement of the isospin asymmetry in B→K(∗)μ+μ− decays.

Research output: Contribution to journalArticle

Related Edinburgh Organisations

Open Access permissions

Open

Documents

  • Download as Adobe PDF

    Rights statement: his article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited

    Final published version, 776 KB, PDF-document

Original languageEnglish
Article number133
Number of pages1
JournalJournal of High Energy Physics
Volume2012
Issue number7
Early online date15 May 2012
DOIs
StatePublished - Jul 2012

Abstract

The isospin asymmetries of B→K(∗)μ+μ− decays and the partial branching fractions of B0→K0μ+μ− and B+→K∗+μ+μ− are measured as a function of the di-muon mass squared q2 using an integrated luminosity of 1.0 fb−1 collected with the LHCb detector. The B→Kμ+μ− isospin asymmetry integrated over q2 is negative, deviating from zero with over 4 σ significance. The B→K∗μ+μ− decay measurements are consistent with the Standard Model prediction of negligible isospin asymmetry. The observation of the decay B0→K0Sμ+μ− is reported with 5.7 σ significance. Assuming that the branching fraction of B0→K0μ+μ− is twice that of B0→K0Sμ+μ−, the branching fractions of B0→K0μ+μ− and B→K∗+μ+μ− are found to be (0.31+0.07−0.06)×10−6 and (1.16±0.19)×10−6, respectively.

Download statistics

No data available

ID: 4121488