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This Letter presents a differential cross-section measurement of Lund subjet multiplicities, suitable for testing current and future parton shower Monte Carlo algorithms. This measurement is made in dijet events in 140 fb−1 of s=13 TeV proton–proton collision data collected with the ATLAS detector at CERN's Large Hadron Collider. The data are unfolded to account for acceptance and detector-related

The ratio of branching ratios of the W boson to muons and electrons, RWμ/e=B(W→μν)/B(W→eν), has been measured using 140fb-1 of pp collision data at s=13 TeV collected with the ATLAS detector at the LHC, probing the universality of lepton couplings. The ratio is obtained from measurements of the tt¯ production cross-section in the ee, eμ and μμ dilepton final states. To reduce systematic uncertaint

In the present work, we addressed the relationship between parental leave policies and social norms. Using a pre-registered, cross-national approach, we examined the relationship between parental leave policies and the perception of social norms for the gender division of childcare. In this study, 19,259 students (11,924 women) from 48 countries indicated the degree to which they believe childcare

Flow harmonic coefficients, vn, which are the key to studying the hydrodynamics of the quark-gluon plasma (QGP) created in heavy-ion collisions, have been measured in various collision systems and kinematic regions and using various particle species. The study of flow harmonics in a wide pseudorapidity range is particularly valuable to understand the temperature dependence of the shear viscosity t

ATLAS measured the centrality dependence of the dijet yield using Formula Presented of Formula Presented data collected at Formula Presented in 2016. The event centrality, which reflects the Formula Presented impact parameter, is characterized by the total transverse energy registered in the Pb-going side of the forward calorimeter. The central-to-peripheral ratio of the scaled dijet yields, Formu

An amplitude analysis of the B0→K∗0μ+μ- decay is presented. The analysis is based on data collected by the LHCb experiment from proton-proton collisions at s=7, 8 and 13 TeV, corresponding to an integrated luminosity of 4.7 fb-1. For the first time, Wilson coefficients and nonlocal hadronic contributions are accessed directly from the unbinned data, where the latter are parametrized as a function

The CP properties of the coupling between the Higgs boson and the top quark are investigated using 139 fb−1 of proton–proton collision data recorded by the ATLAS experiment at the LHC at a centre-of-mass energy of s=13 TeV. The CP structure of the top quark–Higgs boson Yukawa coupling is probed in events with a Higgs boson decaying into a pair of b-quarks and produced in association with either a

The impact of the Russian war against Ukraine should have far-reaching repercussions on the teaching of International Relations (IR) and European Union (EU) studies. In this article, it is argued that Ukrainian resistance to the invasion must be part of an important shift in thinking about IR and the EU within holistic planetary politics. First, the terminologies and technologies of teaching IR an

Results from a wide range of searches targeting different experimental signatures with and without missing transverse momentum (ETmiss) are used to constrain a Two-Higgs-Doublet Model (2HDM) with an additional pseudo-scalar mediating the interaction between ordinary and dark matter (2HDM+a). The analyses use up to 139 fb−1 of proton–proton collision data at a centre-of-mass energy s=13 TeV recorde

Kollektivtrafikens bytespunkter och hållplatser än mer än platser för väntan – de utgör en central del av stadens liv och människors vardag. För att dessa kollektivtrafikrum ska bli inbjudande och tillgängliga för alla, är det viktigt att vi noggrant överväger hur de planeras och utformas. I den här boken presenteras de viktigaste aspekterna för att säkerställa att dessa platser fungerar som inklu

Although the literature widely discusses the role of academics as experts in public policy making, empirical case studies on ethical problems related to the production and implementation of health policy are scarce. During COVID-19, the Swedish policy document (PD) National Principles for Prioritization in Intensive Care under Extraordinary Conditions was produced in collaboration with 11 academic

What is sound when it is not heard? How does this unheard sound affect us? What might such sound reveal to us and how would we know? How do we recall sounds when their sources are no longer accessible? Traces of Sound. Reflections of Sounds Unheard invites scholars of music archae-ology, German literature, media technology, sound art, human perception and theoretical physics to reflect upon these

The Λb0 → D+D−Λ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.3 fb−1. Using the B0 → D+D−KS0 decay as a reference channel, the product of the relative production cross-section and decay branching fractions is measured to be (Formula presented.) where the f

The ratio of production cross-sections of ψ(2S) over J/ψ mesons as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy s = 13 TeV is measured with a data sample collected by the LHCb detector, corresponding to an integrated luminosity of 658 pb−1. The ratio is measured for both prompt and non-prompt ψ(2S) and J/ψ mesons. When there is an overlap betwe

Packaging waste is an active environmental problem. There is an ongoing process of change in both the EU and Sweden to reduce the amount of packaging waste and create more resources for a circular flow. Considering this, there are contexts, despite new legislation, where single-use packaging will still be offered. Therefore it becomes significant to understand how the consumer can be influenced in

Länge var idrotten något unionsrätten endast berörde som försiktigast. Den europeiska idrottsmodellen som bygger på öppna tävlingar och en pyramid-struktur byggd på enfederationsprincipen med europeiska UEFA och inter-nationella FIFA i toppen sågs länge som helig och oantastbar. Men sedan Bosman-domen på 90-talet har EU-domstolen i allt högre grad tagit sig an sporten. Kulmen (hittills?) nåddes deFor a long time, sport was something that EU’s legal framework only touched on with great caution. The European model of sport, based on open competitions and a pyramid structure built on the single-federation princi-ple with continental UEFA and international FIFA at the top, was long seen as sacred and inviolable. But since the Bosman ruling in the 1990s, the Eu-ropean Court of Justice has incre

This essay examines Russia’s nuclear rhetoric in relation to the war in Ukraine, with a focus on the strategic and normative dimensions of deterrence and the nuclear taboo. By using Thomas C. Schelling’s theories of deterrence and signaling and Nina Tannenwald’s theory of the nuclear weapons taboo, the study analyze how Russia’s rhetoric and actions relate to the theories in question. The study us