Results 91 to 100 of about 65,037 (303)
Pseudoscalars in the charmonium model [PDF]
Zeitschrift f�r Physik C Particles and Fields, 1980 We take the recently found charmonium state at 2.976 GeV to be the ηc and show that it can be included in a charmonium model with relativistic corrections which reproduces the s-wave spectrum, the leptonic widths Γ(V→e+ e−) and the p-wave splittings. The upsilon spectrum is discussed as are the effects of radial and pseudoscalar mixing.
F.D. Gault, A. Bradley
openaire +1 more source
Type-III two Higgs doublet model plus a pseudoscalar confronted with h→μτ, muon g−2 and dark matter
Nuclear Physics B, 2016 In this work, we introduce an extra singlet pseudoscalar into the Type-III two Higgs doublet model (2HDM) which is supposed to solve a series of problems in the modern particle-cosmology.
Xuewen Liu +3 more
doaj +1 more source
Global constraints on neutral-current generalized neutrino interactions
Journal of High Energy Physics, 2021 We study generalized neutrino interactions (GNI) for several neutrino processes, including neutrinos from electron-positron collisions, neutrino-electron scattering, and neutrino deep inelastic scattering.
F. J. Escrihuela +3 more
doaj +1 more source
Precision of a data-driven estimate of hadronic light-by-light scattering in the muon $g-2$: Pseudoscalar-pole contribution [PDF]
, 2016 The evaluation of the numerically dominant pseudoscalar-pole contribution to hadronic light-by-light scattering in the muon g-2 involves the pseudoscalar-photon transition form factor F_{P gamma^* gamma^*}(-Q_1^2, -Q_2^2) with P = pi^0, eta, eta^\prime ...
A. Nyffeler
semanticscholar +1 more source
Exploring Dark Photon Production and Kinetic Mixing Constraints in Heavy‐Ion Collisions
Astronomische Nachrichten, EarlyView.ABSTRACT Vector U‐bosons, often referred to as “dark photons,” are potential candidates for mediating dark matter interactions. In this study, we outline a procedure to derive theoretical constraints on the upper bound of the kinetic mixing parameter ϵ2MU$$ {\upvarepsilon}^2\left({M}_U\right) $$ using dilepton data from heavy‐ion from SIS to RHIC ...
Adrian William Romero Jorge +3 more
wiley +1 more source
Properties of flavour-singlet pseudoscalar mesons from lattice QCD
EPJ Web of Conferences, 2017 We report on the status of the determination of properties of flavour-singlet pseudoscalar mesons using Wilson twisted mass lattice QCD at maximal twist.
Urbach Carsten
doaj +1 more source
Quark and glue spectroscopy of scalars and pseudoscalars in SU(3) flavor limit [PDF]
, 2018 Within the framework of the generalized linear sigma model with glueballs recently proposed [1,2], we study the schematic spectroscopy of scalar and pseudoscalar mesons in the SU(3) flavor limit and explore their quark and glue contents. In this framework, for both scalars and pseudoscalars, the two octet physical states are admixtures of quark ...
arxiv +1 more source
On the masses of light pseudoscalar mesons [PDF]
arXiv, 2023 We investigate the masses of light pseudoscalar mesons by the method based on a new anomaly free condition for axial vector current. By this viewpoint, the field theories discussed here do not have the $U(1)$ problem. We calculate the masses of nine light pseudoscalar mesons, with theoretical result agrees reasonably good with experiment.
arxiv
Discovering the Higgs with Low Mass Muon Pairs [PDF]
, 2009 Many models of electroweak symmetry breaking have an additional light pseudoscalar. If the Higgs boson can decay to a new pseudoscalar, LEP searches for the Higgs can be significantly altered and the Higgs can be as light as 86 GeV. Discovering the Higgs
/SLAC /Stanford U., Phys. Dept. +2 more
core +1 more source
Minimal renormalizable simplified dark matter model with a pseudoscalar mediator [PDF]
, 2017 We consider a minimal renormalizable and gauge invariant dark matter (DM) model, in which the singlet fermion DM has only axial couplings to a new pseudoscalar mediator. The mixing between the pseudoscalar mediator and the standard model (SM) Higgs boson
S. Baek, P. Ko, Jinmian Li
semanticscholar +1 more source