Topic
Electroweak interaction
About: Electroweak interaction is a research topic. Over the lifetime, 16333 publications have been published within this topic receiving 468927 citations. The topic is also known as: electroweak force.
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Aix-Marseille University1, University of Oklahoma2, Azerbaijan National Academy of Sciences3, University of Malaya4, University of Paris5, University of Toronto6, Niels Bohr Institute7, University of Sussex8, Tel Aviv University9, University of Oregon10, Stockholm University11, University of Udine12, University of Tokyo13, Jagiellonian University14, Northern Illinois University15, Ludwig Maximilian University of Munich16, Rutherford Appleton Laboratory17, University of California, Santa Cruz18, Technion – Israel Institute of Technology19, University of Coimbra20, Boston University21, Joint Institute for Nuclear Research22, Kyoto University23, Lund University24, University of Geneva25, University of Bologna26, University of Victoria27, Radboud University Nijmegen28, CERN29, National Technical University of Athens30, Czech Technical University in Prague31, University of Salento32, Columbia University33, University of Birmingham34, University of Naples Federico II35, University of Copenhagen36, University of Washington37, University of Glasgow38, University of Valencia39, University of California, Berkeley40, Federal University of Rio de Janeiro41, University of Oxford42, Brandeis University43, University of Michigan44, University of Sheffield45, University of Texas at Austin46, Heidelberg University47, University of Bern48, University of Milan49, National and Kapodistrian University of Athens50, Budker Institute of Nuclear Physics51, Novosibirsk State University52, National Research Nuclear University MEPhI53, University of California, Irvine54
TL;DR: In this paper, a search for electroweak production of supersymmetric particles in scenarios with compressed mass spectra in final states with two low-momentum leptons and missing transverse momentum is presented.
Abstract: A search for electroweak production of supersymmetric particles in scenarios with compressed mass spectra in final states with two low-momentum leptons and missing transverse momentum is presented. This search uses proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider in 2015–2016, corresponding to
36.1
fb
−
1
of integrated luminosity at
√
s
=
13
TeV
. Events with same-flavor pairs of electrons or muons with opposite electric charge are selected. The data are found to be consistent with the Standard Model prediction. Results are interpreted using simplified models of
R
-parity-conserving supersymmetry in which there is a small mass difference between the masses of the produced supersymmetric particles and the lightest neutralino. Exclusion limits at 95% confidence level are set on next-to-lightest neutralino masses of up to 145 GeV for Higgsino production and 175 GeV for wino production, and slepton masses of up to 190 GeV for pair production of sleptons. In the compressed mass regime, the exclusion limits extend down to mass splittings of 2.5 GeV for Higgsino production, 2 GeV for wino production, and 1 GeV for slepton production. The results are also interpreted in the context of a radiatively-driven natural supersymmetry model with nonuniversal Higgs boson masses.
165 citations
TL;DR: In this article, the friction on the bubble wall is computed using a kinetic theory approach and including hydrodynamic effects, and the results are used in calculating the baryon asymmetry in various singlet-driven scenarios, as well as other features related to cosmological phase transitions in the early Universe, such as the resulting spectrum of gravitational radiation.
Abstract: The standard picture of electroweak baryogenesis requires slowly expanding bubbles. This can be difficult to achieve if the vacuum expectation value (VEV) of a gauge singlet scalar field changes appreciably during the electroweak phase transition. It is important to determine the bubble wall velocity in this case, since the predicted baryon asymmetry can depend sensitively on its value. Here, this calculation is discussed and illustrated in the real singlet extension of the Standard Model. The friction on the bubble wall is computed using a kinetic theory approach and including hydrodynamic effects. Wall velocities are found to be rather large (v
w
≳ 0.2) but compatible with electroweak baryogenesis in some portions of the parameter space. If the phase transition is strong enough, however, a subsonic solution may not exist, precluding non-local electroweak baryogenesis altogether. The results presented here can be used in calculating the baryon asymmetry in various singlet-driven scenarios, as well as other features related to cosmological phase transitions in the early Universe, such as the resulting spectrum of gravitational radiation.
165 citations
TL;DR: In this article, higher-order coefficients required to perform threshold resummation for electroweak annihilation processes, such as Drell-Yan or Higgs production via gluon fusion, can be computed using perturbative results derived in deep inelastic scattering.
165 citations
TL;DR: In this paper, a global likelihood function in the space of dimension-six Wilson coefficients in the Standard Model Effective Field Theory is presented, which can serve as a basis either for model-independent fits or for testing dynamical models, in particular models built to address the anomalies in B physics.
Abstract: We present a global likelihood function in the space of dimension-six Wilson coefficients in the Standard Model Effective Field Theory. The likelihood includes contributions from flavour-changing neutral current B decays, lepton flavour universality tests in charged- and neutral-current B and K decays, meson-antimeson mixing observables in the K, B, and D systems, direct CP violation in $$K\rightarrow \pi \pi $$
, charged lepton flavour violating B, tau, and muon decays, electroweak precision tests on the Z and W poles, the anomalous magnetic moments of the electron, muon, and tau, and several other precision observables, 265 in total. The Wilson coefficients can be specified at any scale, with the one-loop running above and below the electroweak scale automatically taken care of. The implementation of the likelihood function is based on the open source tools flavio and wilson as well as the open Wilson coefficient exchange format (WCxf) and can be installed as a Python package. It can serve as a basis either for model-independent fits or for testing dynamical models, in particular models built to address the anomalies in B physics. We discuss a number of example applications, reproducing results from the EFT and model building literature.
165 citations
CERN1
TL;DR: In this article, various aspects of the Higgs boson phenomenology of the Minimal Supersymmetric Standard Model (MSSM) are reviewed, with emphasis on the effects of higher-order corrections.
Abstract: Various aspects of the Higgs boson phenomenology of the Minimal Supersymmetric Standard Model (MSSM) are reviewed. Emphasis is put on the effects of higher-order corrections. The masses and couplings are discussed in the MSSM with real and complex parameters. Higher-order corrections to Higgs boson production channels at a prospective e+e- linear collider are investigated. Corrections to Higgs boson decays to SM fermions and their phenomenological implications for hadron and lepton colliders are explored.
165 citations