scholarly journals New vector bosons in the electroweak sector: A renormalizable model with decoupling

1997 ◽  
Vol 56 (9) ◽  
pp. 5731-5747 ◽  
Author(s):  
R. Casalbuoni ◽  
S. De Curtis ◽  
D. Dominici ◽  
M. Grazzini
Keyword(s):  
Vector Bosons ◽  
Electroweak Sector ◽  
Renormalizable Model

scholarly journals Collinear electroweak radiation in antenna parton showers

2020 ◽  
Vol 80 (10) ◽  
Author(s):  
Ronald Kleiss ◽  
Rob Verheyen
Keyword(s):  
Vector Boson ◽  
Electroweak Theory ◽  
Initial State ◽  
Final State ◽  
Yang Mills ◽  
Spin Effects ◽  
Vector Bosons ◽  
Lhc Physics ◽  
Electroweak Sector ◽  
Preliminary Description

AbstractWe present a first implementation of collinear electroweak radiation in the Vincia parton shower. Due to the chiral nature of the electroweak theory, explicit spin dependence in the shower algorithm is required. We thus use the spinor-helicity formalism to compute helicity-dependent branching kernels, taking special care to deal with the gauge relics that may appear in computation that involve longitudinal polarizations of the massive electroweak vector bosons. These kernels are used to construct a shower algorithm that includes all possible collinear final-state electroweak branchings, including those induced by the Yang–Mills triple vector boson coupling and all Higgs couplings, as well as vector boson emissions from the initial state. We incorporate a treatment of features particular to the electroweak theory, such as the effects of bosonic interference and recoiler effects, as well as a preliminary description of the overlap between electroweak branchings and resonance decays. Some qualifying results on electroweak branching spectra at high energies, as well as effects on LHC physics are presented. Possible future improvements are discussed, including treatment of soft and spin effects, as well as issues unique to the electroweak sector.

VECTOR AND AXIAL-VECTOR BOUND STATES FROM A STRONGLY INTERACTING ELECTROWEAK SECTOR

1989 ◽  
Vol 04 (05) ◽  
pp. 1065-1110 ◽  
Author(s):  
R. CASALBUONI ◽  
S. DE CURTIS ◽  
D. DOMINICI ◽  
F. FERUGLIO ◽  
R. GATTO
Keyword(s):  
Standard Model ◽  
Bound States ◽  
Axial Vector ◽  
High Energy ◽  
Electroweak Theory ◽  
Theoretical Frameworks ◽  
The Standard Model ◽  
Model Predictions ◽  
Vector Bosons ◽  
Electroweak Sector

The possibility that both vector and axial-vector bound states could originate from a strong interacting sector of the electroweak theory is considered. A simple Lagrangian parametrization is presented where the bound states are described as gauge vector bosons of a local, nonlinearly realized, SU (2) ⊗ SU (2) symmetry. At present the model is mostly constrained from data on W and Z masses and on neutrino-nucleon deep inelastic scattering. High energy e+e− tests are suggested where visible deviations from the standard model predictions could take place. These deviations exhibit a certain pattern which allows to distinguish the model from other theoretical frameworks. We find that precise measurements of W and Z masses and asymmetries in e+e− collisions could put strong restrictions on the parameters of the model if no appreciable deviations are found from the standard model, except for a case with the vector and axial-vector bosons degenerate in mass and coupling. General differences with respect to technicolor are pointed out.

scholarly journals Cosmological bounds on sub-GeV dark vector bosons from electromagnetic energy injection

2020 ◽  
Vol 2020 (7) ◽  
Author(s):  
John Coffey ◽  
Lindsay Forestell ◽  
David E. Morrissey ◽  
Graham White
Keyword(s):  
Electromagnetic Energy ◽  
Vector Bosons

scholarly journals Indirect $$ \mathcal{CP} $$ probes of the Higgs-top-quark interaction: current LHC constraints and future opportunities

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Henning Bahl ◽  
Philip Bechtle ◽  
Sven Heinemeyer ◽  
Judith Katzy ◽  
Tobias Klingl ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Top Quark ◽  
Decay Channel ◽  
New Physics ◽  
Current Data ◽  
Quark Interaction ◽  
The Standard Model ◽  
Vector Bosons ◽  
Selection Of

Abstract The $$ \mathcal{CP} $$ CP structure of the Higgs boson in its coupling to the particles of the Standard Model is amongst the most important Higgs boson properties which have not yet been constrained with high precision. In this study, all relevant inclusive and differential Higgs boson measurements from the ATLAS and CMS experiments are used to constrain the $$ \mathcal{CP} $$ CP -nature of the top-Yukawa interaction. The model dependence of the constraints is studied by successively allowing for new physics contributions to the couplings of the Higgs boson to massive vector bosons, to photons, and to gluons. In the most general case, we find that the current data still permits a significant $$ \mathcal{CP} $$ CP -odd component in the top-Yukawa coupling. Furthermore, we explore the prospects to further constrain the $$ \mathcal{CP} $$ CP properties of this coupling with future LHC data by determining tH production rates independently from possible accompanying variations of the $$ t\overline{t}H $$ t t ¯ H rate. This is achieved via a careful selection of discriminating observables. At the HL-LHC, we find that evidence for tH production at the Standard Model rate can be achieved in the Higgs to diphoton decay channel alone.

scholarly journals Heavy Higgs as a portal to the supersymmetric electroweak sector

2019 ◽  
Vol 2019 (4) ◽  
Author(s):  
Stefania Gori ◽  
Zhen Liu ◽  
Bibhushan Shakya
Keyword(s):  
Electroweak Sector

Creation of vector bosons by an electric field in curved spacetime

2014 ◽  
Vol 343 ◽  
pp. 40-48 ◽  
Author(s):  
E. Ersin Kangal ◽  
Hilmi Yanar ◽  
Ali Havare ◽  
Kenan Sogut
Keyword(s):  
Electric Field ◽  
Curved Spacetime ◽  
Vector Bosons

scholarly journals Dark matter, dark energy and gravity

2015 ◽  
Vol 24 (02) ◽  
pp. 1550012 ◽  
Author(s):  
B. A. Robson
Keyword(s):  
Dark Matter ◽  
Dark Energy ◽  
Particle Physics ◽  
Composite Structures ◽  
Gravitational Interaction ◽  
Asymptotic Freedom ◽  
Generation Model ◽  
Newtonian Gravitation ◽  
Color Confinement ◽  
Vector Bosons

Within the framework of the Generation Model (GM) of particle physics, gravity is identified with the very weak, universal and attractive residual color interactions acting between the colorless particles of ordinary matter (electrons, neutrons and protons), which are composite structures. This gravitational interaction is mediated by massless vector bosons (hypergluons), which self-interact so that the interaction has two additional features not present in Newtonian gravitation: (i) asymptotic freedom and (ii) color confinement. These two additional properties of the gravitational interaction negate the need for the notions of both dark matter and dark energy.

scholarly journals Astrophysical aspects of milli-charged dark matter in a Higgs–Stueckelberg model

2015 ◽  
Vol 30 (18) ◽  
pp. 1550089 ◽  
Author(s):  
A. L. dos Santos ◽  
D. Hadjimichef
Keyword(s):  
Dark Matter ◽  
Weakly Interacting Massive Particles ◽  
Dark Sector ◽  
Minimal Coupling ◽  
Astrophysical Application ◽  
Gauge Sector ◽  
Dark Photon ◽  
The Standard Model ◽  
Vector Bosons ◽  
The Impact

An extension of the Standard Model (SM) is studied, in which two new vector bosons are introduced, a first boson Z' coupled to the SM by the usual minimal coupling, producing an enlarged gauge sector in the SM. The second boson A' field, in the dark sector of the model, remains massless and originates a dark photon γ'. A hybrid mixing scenario is considered based on a combined Higgs and Stueckelberg mechanisms. In a Compton-like process, a photon scattered by a weakly interacting massive particles (WIMP) is converted into a dark photon. This process is studied, in an astrophysical application obtaining an estimate of the impact on stellar cooling of white dwarfs and neutron stars.

Sign in / Sign up

Export Citation Format

Share Document