Measurement of the Electroweak Penguin ProcessB→Xsℓ+ℓ−

2002/08/31 by J. Kaneko, Belle Collaboration, K. Abe +94 · 1 citation
Physics and Astronomy · #Branching fraction #Collider #Electron–positron annihilation #Electroweak interaction #Hadron #High-Energy Particle Collisions Research #KEKB #Muon #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.1103/physrevlett.90.021801

published as Phys.Rev.Lett.90:021801,2003 · 10 pages, 2 figures, to be published in Phys.Rev.Lett

arxiv created 2002/12/26 · openalex publication_date 2003/01/16 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report the first measurement of the branching fraction for the inclusive decay B\ensuremath→X_s\ensuremathℓ⁺\ensuremathℓ^\ensuremath-, where \ensuremathℓ is either an electron or a muon, and X_s is a hadronic recoil system that contains an s quark. We analyzed a data sample of 65.4\ifmmode×\else\texttimes\fi10⁶ B meson pairs collected with the Belle detector at the KEKB e⁺e^\ensuremath- asymmetric-energy collider. We find B(B\ensuremath→X_s\ensuremathℓ⁺\ensuremathℓ^\ensuremath-)=[6.1 \ifmmode±\else\textpm\fi1.4(stat)_\ensuremath-1.1^+1.4(syst)]\ifmmode×\else\texttimes\fi10^\ensuremath-6 for dilepton masses greater than 0.2 GeV/c².

Citations

• Search for Inclusive b → sl⁺l^-
• THE USE OF MULTIPLE MEASUREMENTS IN TAXONOMIC PROBLEMS
• Two-loop virtual corrections to B→Xsℓ+ℓ− in the standard model
• Improved model-independent analysis of semileptonic and radiative rareBdecays
• Observation of the decay B --> Kl+l-.

Cited by

• Anatomy of prominent B and K decays and signatures of CP-violating new physics in the electroweak penguin sector