“…The observables are measured for two jet pairings, corresponding to the colour-connected daughters of the $W$~boson and the $b$-jets from the top quark decay. To allow the comparison of the measured distributions to colour model predictions, they are unfolded to particle-level, thereby removing smearing and distortions introduced by the detector. …”
Enlace del recurso

“…These signatures include events with an additional photon or additional jet activity not associated with any specific underlying quark flavor. No significant excess of events is observed above the Standard Model prediction and 95$\%$ confidence-level upper limits of between 0.083 and 0.32 fb are set on the visible cross section of contributions from physics beyond the Standard Model. …”
Enlace del recurso

“…When the top squark decays into an off-shell top quark and a neutralino, the limits extend up to 420 and 360 GeV for the top squark and neutralino masses, respectively.…”
Enlace del recurso

“…A search for heavy resonances decaying into a vector boson and the standard model Higgs boson is presented, in final states containing b quark-antiquark pairs from the decay of the Higgs boson and leptons (electrons and muons) or missing transverse momentum, because of undetected neutrinos, from the decay of the vector bosons. …”
Enlace del recurso

“…They become increasingly important in detailed studies of the Standard Model, among them the inclusive search for the Higgs boson produced with high transverse momentum decaying to a bottom-antibottom quark pair. To date, ATLAS has mostly focused on the use of calorimeter-based jet substructure, which works well for jets initiated by particles with low to moderate boost, but which lacks the angular resolution needed to resolve the desired substructure in the highly-boosted regime. …”
Enlace del recurso

“…One of the key tools to investigate the strongly-interacting medium (Quark-Gluon Plasma, QGP) formed in heavy-ion collisions is the measurement of open-charm particle production. …”
Enlace del recurso

“…Cross-section measurements for the production of a Higgs boson through gluon-gluon fusion, vector-boson fusion, and in association with a vector boson or a top-quark pair are reported. The signal strength, defined as the ratio of the observed to the expected signal yield, is measured for each of these production processes as well as inclusively. …”
Enlace del recurso

Enlace del recurso

“…A search for events with a single top quark produced in association with a photon is performed. …”
Enlace del recurso

“…A tracking algorithm for the reconstruction of the daughters of long-lived particles in LHCb 5 Jun 2018, 16:00 1h 30m Library, Centro San Domenico () LHC experiments Posters session Speaker Katharina Mueller (Universitaet Zuerich (CH)) Description The LHCb experiment at CERN operates a high precision and robust tracking system to reach its physics goals, including precise measurements of CP-violation phenomena in the heavy flavour quark sector and searches for New Physics beyond the Standard Model. …”
Enlace del recurso

“…The data are presented in bins of invariant mass, absolute di-lepton rapidity, |yℓℓ|, and the angular variable cosθ∗ between the outgoing lepton and the incoming quark in the Collins-Soper frame. The measurements are performed in the range |yℓℓ|<2.4 in the muon channel, and extended to |yℓℓ|<3.6 in the electron channel. …”
Enlace del recurso

“…</p> <p><span><span>We present the first measurement of antiproton production in proton-helium (pHe) fixed-target collisions at the LHC, which is an input for the modelling of the antiproton flux measured by AMS, and the first measurement of charm production in pHe and pAr fixed-target collisions at the LHC, which is of interest both for discussions of intrinsic charm and as a baseline for future ion-ion collision studies for quark-gluon plasma physics. Using data taken in collider mode, we discuss recent pPb collision measurements of quarkonia and open charm states, which probe nuclear modifications down to low Bjorken-x, and the measurement of J/psi production in ultra-peripheral PbPb collisions. …”
Enlace del recurso

“…Comparisons of the predictions of the new tunes are provided for observables sensitive to the global underlying event, to soft multiparton interactions, and to double-parton scattering contributions, as well as for observables measured in various final states, such as multijet, Drell-Yan, and top quark-antiquark pair production. Here the simulation of the underlying event provided by the new tunes is interfaced to a higher-order matrix-element calculation. …”
Enlace del recurso

“…The $B^0 \to D^+_s \pi^-$ decay is described by a single tree diagram and probes the u→ b quark transition |Vub| and non- factorisable effects |aNF|. …”
Enlace del recurso

“…The apparatus is designed like a fixed-target experiment due to the very forward peaked b-quark distribu7on at LHC. It is composed of five systems: vertexing, tracking, ring cherenkov detectors, the calorimeters and the muon system. …”
Enlace del recurso

“…The High-Luminosity LHC (HL-LHC) with a centre-of-mass energy of 14 TeV and an integrated luminosity of 3 ab$^{-1}$ will allow an extension of the sensitivity to cross sections of order of a few ab for heavy neutrino masses $M(N_\ell)$ ranging from 3 to 9 TeV for the $\ell \ell q\bar{q}^\prime$ channel, where $\ell$ is an electron or a muon and $q$ is a quark. For the compositeness scale $\Lambda=M(N_\ell)$, the existence of a heavy Majorana neutrino could be excluded for masses up to 8 TeV at the $95\%$ confidence level. …”
Enlace del recurso

“…$W^\prime$ bosons are searched for in final states with a bottom and a top quark or with a lepton plus missing transverse energy. …”
Enlace del recurso

“…Because photons do not carry color charge, they are unaffected by the medium, and thus provide information about the momentum, direction, and flavor (quark or gluon) of the associated hard-scattered parton before it begins to shower and becomes quenched. …”
Enlace del recurso
Enlace del recurso

“…Measurements of charged-particle production in heavy-ion collisions and their comparison to $pp$ data provide insight into the properties of the quark-gluon plasma. In 2015, the ATLAS detector at the LHC recorded 0.49nb$^{-1}$ of Pb+Pb collisions and 25pb$^{-1}$ of $pp$ collisions at a center-of-mass energy of $\sqrt{s_{\mathrm{NN}}}=\sqrt{s}=5.02$TeV. …”
Enlace del recurso
Enlace del recurso

“…In Pb-Pb, the mechanisms that give rise to such features have been traditionally associated to the formation of a Quark-Gluon Plasma (QGP), so that these findings raise a crucial question: could it be that a QGP is formed already in small systems?…”
Enlace del recurso