Results 31 to 40 of about 5,712,926 (229)

An effective field theory approach for electroweak interactions in the high energy limit

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
We present an effective action for the electroweak sector of the standard model valid for the calculation of scattering amplitudes in the high energy (Regge) limit.
Melina Gómez Bock   +2 more
doaj   +1 more source

Measurement of the cross section for electroweak production of a Z boson, a photon and two jets in proton-proton collisions at s $$ \sqrt{\mathrm{s}} $$ = 13 TeV and constraints on anomalous quartic couplings

open access: yesJournal of High Energy Physics, 2020
A measurement is presented of the cross section for electroweak production of a Z boson and a photon in association with two jets (Zγjj) in proton-proton collisions.
The CMS collaboration   +2314 more
doaj   +1 more source

Measurement of Λ transverse polarization in e + e − collisions at s $$ \sqrt{s} $$ = 3.68 − 3.71 GeV

open access: yesJournal of High Energy Physics, 2023
With data samples collected with the BESIII detector at seven energy points at s $$ \sqrt{s} $$ = 3.68 − 3.71 GeV, corresponding to an integrated luminosity of 333 pb −1, we present a study of the Λ transverse polarization in the e + e − → Λ Λ ...
The BESIII collaboration   +603 more
doaj   +1 more source

Theory of Z boson decays [PDF]

open access: yes, 1999
The precision data on Z boson decays from LEP-I and SLC colliders are compared with the predictions based on the Minimal Standard Theory. The Born approximation of the theory is based on three most accurately known observables: G_mu -- the four fermion ...
Novikov, V. A.   +3 more
core   +3 more sources

Test of lepton universality in beauty-quark decays [PDF]

open access: yesNature Physics, 2021
The standard model of particle physics currently provides our best description of fundamental particles and their interactions. The theory predicts that the different charged leptons, the electron, muon and tau, have identical electroweak interaction ...
L. C. R. Aaij   +499 more
semanticscholar   +1 more source

TeV scale Dark Matter and electroweak radiative corrections [PDF]

open access: yes, 2010
Recent anomalies in cosmic rays data, namely from the PAMELA collaboration, can be interpreted in terms of TeV scale decaying/annihilating Dark Matter.
Alfredo Urbano   +3 more
core   +1 more source

Measurement of the weak mixing angle at a Super Charm-Tau factory with data-driven monitoring of the average electron beam polarization

open access: yesJournal of High Energy Physics, 2020
A method for measuring the average longitudinal polarization of the electron beam at an electron-positron collider operating near the J/ψ resonance is proposed. The method utilizes the differential cross-section of J / ψ → Λ → p π − Λ → p ¯ π + $$ J/\psi
A. Bondar   +4 more
doaj   +1 more source

Probing anomalous off-shell electroweak dipole moment of the top quark

open access: yesEPJ Web of Conferences, 2017
A possibility to search for anomalous Wtb interaction ∂μWμ−b¯ f W L P L + f W R P R t is considered for the first time. Despite such couplings do not contribute to both pair top quark production or three main electroweak production ...
Boos Edward   +3 more
doaj   +1 more source

Zero-range effective field theory for resonant wino dark matter. Part III. Annihilation effects

open access: yesJournal of High Energy Physics, 2018
Near a critical value of the wino mass where there is a zero-energy S-wave resonance at the neutral-wino-pair threshold, low-energy winos can be described by a zero-range effective field theory (ZREFT) in which the winos interact nonperturbatively ...
Eric Braaten, Evan Johnson, Hong Zhang
doaj   +1 more source

Radiative corrections to decay branching ratios of the CP-odd Higgs boson in two Higgs doublet models

open access: yesNuclear Physics B, 2023
We calculate radiative corrections to decay rates of CP-odd Higgs boson A for various decay modes in the four types of two Higgs doublet models with the softly broken discrete Z2 symmetry.
Masashi Aiko   +2 more
doaj   +1 more source

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