Conveners
Gamma Final States
- German Fabricio Roberto Sborlini (M)
Gamma Final States
- German Fabricio Roberto Sborlini (M)
Dark photons
G.A. Kozlov
Bogolyubov Laboratory of Theoretical Physics Joint Institute for Nuclear Research, Joliot Curie st., 6, Dubna, Moscow region, 141980 Russia
Abstract
The couplings of the Standard Model sector to the scale invariant degrees of freedom can open the possibility to study dark photons (DP). The model for the DP particle solvable in 4-dimensional space-time is...
Among the theoretical models addressing the dark matter problem, the category based on a secluded sector is attracting increasing interest. The PADME experiment, at the Laboratori Nazionali di Frascati (LNF) of INFN, is designed to be sensitive to the production of a low mass gauge boson A’ of a new U(1) symmetry holding for dark particles. This 'dark photon’ is weakly coupled to the photon of...
The high-intensity setup, trigger system flexibility and detector performance make the NA62
experiment at CERN particularly suitable to perform direct searches for long-lived hidden-sector particles, such as dark photons, dark scalars, axion-like particles, and heavy neutral leptons, using kaon and pion decays as well as operating the experiment in dump mode.
Results from NA62 will be...
In March 2018, the KLOE-2 experiment completed its data-taking at the e+e- DAPHNE collider in Frascati, collecting more than 5 fb-1 at the phi peak, thus extending the KLOE physics program with an upgraded detector. The KLOE detector is well suited for the study of fully neutral final states due to its large radius and a hermetic electromagnetic calorimeter, providing excellent timing and...
The nature of the dark matter is still an unsolved mystery and its identification represent a big challenge for model builders and experimentalists. For many years the WIMP miracle has been considered the most promising solution among the Dark Matter candidates. Recently lower energy scales have attracted increasing interest. I will present the axion-like particle (ALP) as a possible...
In high-energy hadron collisions, direct photons can be produced at different stages and are of particular interest to study the hot QCD medium since they escape it without being affected.
At high transverse momentum ($p_{\text{T}}$), their production is dominated by high-$p_{\text{T}}$ parton fragmentation and hard-scattering processes between partons. The latter can be accessed...
We review production of light neutral mesons, neutral pions and eta mesons, measured in pp, pA and AA collisions at LHC energies. Neutral meson production provides exploration of various physics topics: In pp collisions one can test pQCD predictions, study structure function in proton and fragmentation functions, and build a reference for pA and AA collisions; In pA collisions, it enables to...
Based on [1904.01044], I present recent results of a Next-to-Next-to-leading order (NNLO) calculation of inclusive isolated photon and photon-plus-jet production using the Monte-Carlo event generator NNLOJET. In order to mimic experimental photon isolation criteria we apply a staged isolation procedure. A Frixione-type isolation with small cone size is used to ensure numerical stability,...
The main purpose of the LHCf experiment is to test the hadronic interaction models used in ground based cosmic rays experiments to simulate air-showers induced by ultra-high-energy cosmic rays in the Earth atmosphere. Since most of the air-shower energy flow is contained in the very forward region (where soft-QCD processes dominate), Monte Carlo simulations must rely on phenomenological...
Rare and radiative b-hadron decays are sensitive probes of New Physics through the study of branching fractions, angular observables, CP asymmetries and measurements of the polarisation of the photon emitted in the decay.
The LHCb experiment is ideally suited for the analysis of these decays due to its high trigger efficiency, as well as excellent tracking and particle identification...
