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The first evidence for the Higgs boson decay to a Z boson and a photon is presented, with a statistical significance of 3.4 standard deviations. The result is derived from a combined analysis of the searches performed by the ATLAS and CMS Collaborations with proton-proton collision datasets collected at the CERN Large Hadron Collider (LHC) from 2015 to 2018. These correspond to integrated luminosities of around 140 fb^{-1} for each experiment, at a center-of-mass energy of 13 TeV. The measured s

Measurements of the spin correlation coefficients in the beam basis are presented for top quark-antiquark ( <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mi>t</a:mi> <a:mover accent="true"> <a:mi>t</a:mi> <a:mo stretchy="false">¯</a:mo> </a:mover> </a:math> ) systems produced in proton-proton collisions at <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"> <e:msqrt> <e:mi>s</e:mi> </e:msqrt> <e:mo>=</e:mo> <e:mn>13</e:mn> <e:mtext> </e:mtext> <e:mt

Abstract This paper presents a search for new physics through the process where a massive particle, X, decays into a Higgs boson and a second particle, Y. The Higgs boson subsequently decays into a bottom quark–antiquark pair, which is reconstructed as a single large-radius jet. The decay products of Yare also assumed to produce a single large-radius jet. The identification of the Yparticle is enhanced by computing the anomaly score of its candidate jet using an autoencoder, which measures devia