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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The scalar Leptoquark (sLQ) parameter space is well-explored experimentally.The direct pair production searches at the LHC have excluded light sLQs almostmodel agnostically, and the high-$p_{\rm T}$ dilepton tail data have put strongbounds on the leptoquark-quark-lepton Yukawa couplings for a wide range of sLQmasses. However, these do not show the complete picture. Previously, Ref.[JHEP, 07, 028 (2015)] showed how the dilepton-dijet data from the pairproduction searches could give strong limits on these couplings. This waspossible by including the single-production contribution to the dilepton-dijetsignal. In this paper, we take a fresh look at the LHC limits on all sLQs byfollowing the same principle and combine all significant contributions -- frompair and single productions, $t$-channel sLQ exchange and its interference withthe Standard Model background -- to the $\mu\mu jj$ final state and recast thelimits. We notice that the LQ exchange and its interference with the backgroundprocesses play significant roles in the limits. The $\mu\mu jj$-recast limitsare comparable to or, in some cases, significantly better than the currentlyknown limits (from high-$p_{\rm T}$ dilepton data and direct searches), i.e.,the LHC data rules out more parameter space than what is considered in thecurrent literature. For the first time, we also show how including the QEDprocesses can noticeably improve the LQ mass exclusion limits from the QCD-onlylimits.

A fresh look at the LHC limits on scalar leptoquarks