Results 81 to 90 of about 1,110 (184)

Exploring Dark Photon Production and Kinetic Mixing Constraints in Heavy‐Ion Collisions

open access: yesAstronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
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

Nonlinear Vortex Dichroism in Chiral Molecules

open access: yesAdvanced Optical Materials, Volume 13, Issue 3, January 24, 2025.
Chiral molecules are shown to absorb two photons from a linearly polarized Laguerre–Gaussian vortex beams at different rates depending on the sign and magnitude of orbital angular momentum: nonlinear vortex dichroism. This new form of nonlinear optical activity is shown to have many remarkable properties, including novel access to structural ...
Luke Cheeseman, Kayn A. Forbes
wiley   +1 more source

The decays of $$\bar{B}^0$$ B¯0 , $$\bar{B}^0_s$$ B¯s0 and $$B^-$$ B- into $$\eta _c$$ ηc plus a scalar or vector meson

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
We investigate the decays of $$\bar{B}^0_s$$ B¯s0 , $$\bar{B}^0$$ B¯0 and $$B^-$$ B- into $$\eta _c$$ ηc plus a scalar or vector meson in a theoretical framework by taking into account the dominant process for the weak decay of $$\bar{B}$$ B¯ meson into $
Ju-Jun Xie, Gang Li
doaj   +1 more source

Trace and Axial Anomalies on Equal Footing

open access: yesAdvances in High Energy Physics, 2020
We discussed that for some particular nonsupersymmetric theories, a generalized symmetry that includes both the scale and axial transformations and leads to a single current may contain also a pseudoscalar term. The method, inspired by the superconformal
Renata Jora
doaj   +1 more source

Exploring solutions to the muon g-2 anomaly in a 3-3-1 model under flavor constraints

open access: yesEuropean Physical Journal C: Particles and Fields
The magnetic moment of the muon can receive significant two-loop contributions from a light pseudoscalar. Notably, the spectrum of scalars of 3-3-1 models includes one pseudoscalar.
A. Doff   +2 more
doaj   +1 more source

Decays of the pseudoscalar glueball into scalar and pseudoscalar mesons [PDF]

open access: yesProceedings of Xth Quark Confinement and the Hadron Spectrum — PoS(Confinement X), 2013
Walaa I. Eshraim, Stanislaus Janowski
openaire   +1 more source

A Loop-philic Pseudoscalar

open access: yes, 2015
We construct a weakly-coupled renormalizable model to explain the $750\mbox{GeV}$ diphoton excess. The $750\mbox{GeV}$ resonance (denoted as $X(750)$) is interpreted as a pseudoscalar coming from a complex singlet. The model also naturally provides a dark matter candidate. One most attractive feature of the model is that decays of $X(750)$ are all loop-
Li, Gang   +5 more
openaire   +2 more sources

The signatures of the pseudoscalar glueball

open access: yesNuclear Physics B, 1990
Abstract The predominance of the strange mesons decay modes for the pseudoscalar glueball and the Dalitz distributions are obtained, starting from a low-energy theorem based on chiral lagrangians, and extrapolating it to realistic energies by including K ∗ (892) and K 0 ∗ (1430) contributions.
G.J. Gounaris, J.E. Paschalis
openaire   +1 more source

Renormalization of the pseudoscalar operator at four loops in QCD

open access: yesJournal of High Energy Physics
We present the renormalization constant of the pseudoscalar operator defined with a non-anticommuting γ 5 in dimensional regularization up to four-loop order in perturbative Quantum Chromodynamics (QCD).
Long Chen   +2 more
doaj   +1 more source

Search for dark matter produced in association with a Higgs boson decaying to a τ lepton pair in proton-proton collisions at $$\sqrt{s}=13$$ TeV

open access: yesJournal of High Energy Physics
A search for dark matter particles produced in association with a Higgs boson decaying into a pair of τ leptons is performed using data collected in proton-proton collisions at a center-of-mass energy of 13 TeV with the CMS detector.
The CMS collaboration   +2387 more
doaj   +1 more source

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