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

ATLAS has measured two-particle correlations as a function of relativeazimuthal-angle, $\Delta \phi$, and pseudorapidity, $\Delta \eta$, in$\sqrt{s}$=13 and 2.76 TeV $pp$ collisions at the LHC using charged particlesmeasured in the pseudorapidity interval $|\eta|$<2.5. The correlation functionsevaluated in different intervals of measured charged-particle multiplicity showa multiplicity-dependent enhancement at $\Delta \phi \sim 0$ that extends overa wide range of $\Delta\eta$, which has been referred to as the "ridge".Per-trigger-particle yields, $Y(\Delta \phi)$, are measured over2<$|\Delta\eta|$<5. For both collision energies, the $Y(\Delta \phi)$distribution in all multiplicity intervals is found to be consistent with alinear combination of the per-trigger-particle yields measured in collisionswith less than 20 reconstructed tracks, and a constant combinatoriccontribution modulated by $\cos{(2\Delta \phi)}$. The fitted Fouriercoefficient, $v_{2,2}$, exhibits factorization, suggesting that the ridgeresults from per-event $\cos{(2\phi)}$ modulation of the single-particledistribution with Fourier coefficients $v_2$. The $v_2$ values are presented asa function of multiplicity and transverse momentum. They are found to beapproximately constant as a function of multiplicity and to have a$p_{\mathrm{T}}$ dependence similar to that measured in $p$+Pb and Pb+Pbcollisions. The $v_2$ values in the 13 and 2.76 TeV data are consistent withinuncertainties. These results suggest that the ridge in $pp$ collisions arisesfrom the same or similar underlying physics as observed in $p$+Pb collisions,and that the dynamics responsible for the ridge has no strong $\sqrt{s}$dependence.

Observation of long-range elliptic anisotropies in $\sqrt{s}=$13 and 2.76 TeV $pp$ collisions with the ATLAS detector