“…Studies of azimuthal anisotropies for very high $p_{T}$ particles in relativistic heavy ion collisions provide crucial information on the path length dependence of the parton energy loss mechanism in the quark-gluon plasma. Final high-precision data on the elliptic ($v_{2}$) and triangular ($v_{3}$) anisotropy harmonics of charged particles, obtained with the scalar product method, are presented up to $p_{T}$ $\sim$ 100 GeV/c in PbPb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV, using data recorded during the LHC run 2 with the CMS detector. …”
Enlace del recurso
Enlace del recurso

“…The data are compared to fixed-order QCD calculations at 16 next-to-leading order (NLO) and next-to-next-to-leading-order (NNLO) accuracy as well as NLO computations including resummation of initial-state gluon radiation at next-to-next-to-leading-logarithm or matched to a parton shower.…”
Enlace del recurso

“…In our calculation we augmented the Standard Model with three additional operators describing modifications of the top and bottom Yukawa couplings, and a point-like Higgs coupling to gluons. Based on recently presented resummed transverse-momentum spectra including these operators at NLL+NLO accuracy,which we recently presented in Ref [1], in this note we show the extension of the calculation to NNLL+NNLO. …”
Enlace del recurso

“…Improved constraints are placed on the non-Standard-Model CP-even and CP-odd couplings to $Z$ bosons and on the CP-odd coupling to gluons.…”
Enlace del recurso

“…The cross-sections are measured in a fiducial region corresponding to the detector acceptance for leptons, and are compared to the predictions from a variety of Monte Carlo event generators, as well as fixed-order QCD calculations, exploring the sensitivity of the cross-sections to the gluon parton distribution function. Some of the distributions are also sensitive to the top quark pole mass; a combined fit of NLO fixed-order predictions to all the measured distributions yields a top quark mass value of $m_t^{\rm pole}=173.2\pm 0.9\pm 0.8\pm 1.2$ GeV, where the three uncertainties arise from limited data statistics, experimental systematics, and theoretical sources.…”
Enlace del recurso

“…The article on B Physics and CP violations add to this, while the chapter on thermal field theory reviews the formalism necessary to understand the early universe and to embark on an analysis of quark-gluon plasma in heavy ion collisions. Written in a clear pedagogic style by active researchers, this text will prepare a beginner to work in the field and at the same time will also provide useful reference material for active researchers.…”
Enlace del recurso
Enlace del recurso

“…The ATLAS collaboration has studied the dynamics of isolated-photon production in association with gluon, light and heavy quark final states in pp collisions at a centre-of-mass energy of 8 and 13 TeV, which will be presented and discussed, as it constitutes an excellent probe of the flavour structure of the proton.…”
Enlace del recurso

“…The azimuthal anisotropies of particle yields observed in relativistic heavy-ion collisions have been traditionally considered as a strong evidence of the formation on a deconfined quark-gluon plasma produced in these collisions. However multiple recent measurements from the ATLAS Collaboration in pp and p+Pb systems show similar features as those observed in A+A collisions, indicating the possibility of the production of such a deconfined medium in smaller collision systems. …”
Enlace del recurso

“…The ATLAS collaboration has studied the dynamics of isolated-photon production in association with gluon, light and heavy quark final states in pp collisions at a centre-of-mass energy of 8 and 13 TeV, which will be presented and discussed, as it constitutes an excellent probe of the flavour structure of the proton.…”
Enlace del recurso

“…Measurements of open heavy flavour particle and quarkonia production, including their prompt and non-prompt components, and their correlations with light hadrons, build a path to understanding how heavy quarks propagate through the quark-gluon plasma. Additionally, an important component in these studies is the comparison between large and small collision systems. …”
Enlace del recurso

“…In pp collisions, a comparison of the photon-tagged jet FF to that for inclusively selected jets is sensitive to the difference in fragmentation between quark– and gluon–initiated jets in vacuum. The ratio of the FF in Pb+Pb events to those in $pp$ events with the same selection on the photon kinematic variables provides information on the modification of the parton shower for quark-initiated jets as they traverse the hot nuclear medium. …”
Enlace del recurso

“…Charmonium states, such as $J/\psi$ and $\psi\left(2S\right)$ mesons, are excellent probes of the Quark-Gluon Plasma (QGP). The understanding of charmonium production in PbPb collisions requires the inclusion of many phenomena, such as dissociation in the QGP and statistical recombination, on top of cold nuclear matter effects (modifications of nPDFs, initial-state energy loss, nuclear break-up). …”
Enlace del recurso
Enlace del recurso

“…Jet tagging is investigated, including both not-top-quark vs gluon discrimination as well as W/Z boson, H$\to$bb, and top-quark identification. …”
Enlace del recurso

“…Measurements of cross sections of jet and top-quark pair production are in particular sensitive to the gluon distribution in the proton, while the electroweak boson production - inclusive or associated with charm or beauty quarks - gives insight into the flavour separation of the proton sea and to the treatment of heavy quarks in PDF-related studies.…”
Enlace del recurso
Enlace del recurso

“…= \mathrm{e}$ or $\mu$. Both gluon fusion and electroweak production of the scalar resonance are considered, with a free parameter describing their relative cross sections. …”
Enlace del recurso

“…The combination is based on the analysis of the production processes gluon fusion, vector boson fusion, and associated production with a W or Z boson or a pair of top quarks, and of the H$\to$ZZ, WW, $\gamma\gamma$, $\tau\tau$, bb, and $\mu\mu$ decay modes. …”
Enlace del recurso

“…No statistically significant excess is observed, and the production of supersymmetric quark pairs and supersymmetric gluon pairs with masses below $721~\mathrm{GeV}$ and $1.0~\mathrm{TeV}$, respectively, are excluded at the $95\%$ confidence level.…”
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

“…The process can also be used to probe the gluon density function of the proton. The ATLAS collaboration has measured the inclusive jet production cross section in 20.3 /fb of data collected at a center-of-mass energy of 8TeV and in 3.2 /fb of data collected at a center-of-mass energy of 13TeV. …”
Enlace del recurso

“…Unique event categories are used targeting the leading Higgs boson production processes, gluon fusion, vector boson fusion, and associated production. …”
Enlace del recurso