English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A search for the lepton-flavour violating decays $B^0_s \to e^{\pm}\mu^{\mp}$ and $B^0 \to e^{\pm} \mu^{\mp}$ is performed with a data sample,corresponding to an integrated luminosity of 1.0 fb$^{-1}$ of $pp$ collisionsat $\sqrt{s} = 7$ TeV, collected by the LHCb experiment. The observed number of$B^0_s \to e^{\pm} \mu^{\mp}$ and $B^0 \to e^{\pm} \mu^{\mp}$ candidates isconsistent with background expectations. Upper limits on the branchingfractions of both decays are determined to be $BR(B^0_s \to e^{\pm} \mu^{\mp})< 1.1 \,(1.4) \times 10^{-8}$ and $BR (B^0 \to e^{\pm} \mu^{\mp}) < 2.8 \,(3.7)\times 10^{-9}$ at 90% (95%) confidence level (C.L.). These limits are a factorof twenty lower than those set by previous experiments. Lower bounds on thePati-Salam leptoquark masses are also calculated, $M_{\rm LQ} (B^0_s \toe^{\pm} \mu^{\mp}) > 107$ TeV/c$^2$ and $M_{\rm LQ} (B^0 \to e^{\pm} \mu^{\mp})> 126$ TeV/c$^2$ at 95% C.L., and are a factor of two higher than the previousbounds.

Search for the lepton-flavour violating decays $B^0_s \rightarrow e^{\pm}\mu^{\mp}$ and $B^0 \rightarrow e^{\pm} \mu^{\mp}$