Session DD01: V: Physics of the Two Infinities

Advancements in Moroccan Astrophysics: Role of LPHEA/OUCA in Shaping Scientific Excellence

Scientific production in Astrophysics has surged in Morocco since 2016, with LPHEA and OUCA playing pivotal roles. This progress, unprecedented in Africa and the MENA region, merits global attention. Morocco's success in Astrophysics is attributed to international support, strategic partnerships, and investment in research infrastructure. LPHEA and OUCA lead groundbreaking research and foster innovation.A key aspect of our strategy is training and capacity building through educational programs and collaborations, nurturing a new generation of researchers. Morocco's policy of diverse international cooperation leverages resources and expertise, enriching the scientific landscape and facilitating knowledge exchange.

LPHEA and OUCA contribute significantly to scientific knowledge through research, including site testing, High angular resolution study, and exploration of near Earth Objects, exoplanets, and variable stars. Morocco's emergence as a leader in Astrophysics reflects its commitment to excellence and innovation, with LPHEA and OUCA as symbols of achievement.   

Test of the Standard Model at the era of the Large Hadron Collider (LHC).

After the discovery of the Higgs boson in 2012, one of the primary goals of the Large Hadron Collider (LHC) physics program is to perform ever more stringent tests of the Standard Model (SM) of particle physics and find hints of the awaited New Physics.

We will begin with an overview of the SM and present its great success in explaining all data collected so far by several experiments and in particular by CMS and ATLAs experiments at the LHC. Moreover, the LHC and its future High Luminosity option will provide precise measurements of several observables that can be used to test the consistency of the SM and could point toward New Physics and constrain the parameters of several extensions of the SM. At the conclusion, we will present some examples of these SM extensions.   

Comets: Cosmic Tracing of the Solar System Formation

Comets are remnants of the early stages of the Solar System and the most primitive Solar System bodies. Understanding their nature and evolution history provides important clues about the formation of the Solar System and the planets. Comets contain complex organic molecules and may have played a key role in delivering water, organics and noble gases from the interstellar medium to the early Earth, contributing to the origin of life. In this talk, I will delve into the examination of photometric and spectroscopic observations of comets, showing what valuable insights we can get about the formation of our solar system.   

Search for Higgs exotic decays in two leptons and two jets as final state with the ATLAS experiment

The discovery of the Higgs boson opened new windows in the search for new physics phenomena beyond the Standard Model (BSM). In the Standard Model (SM), the Higgs boson is unique: it has zero spin, no electric charge and no strong force interaction. Several BSM theories predict an extended Higgs sector, which motivates searches for neutral and charged Higgs bosons in addition to the Higgs boson already observed at 125 GeV. The presence of a hidden or dark sector of phenomena that relates either weakly or in a particular way to SM fields has theoretical as well as experimental support. Many extensions of SM use hidden or dark sector states based on the Higgs Portal, and thereby opening the Higgs portal as a discovery channel, hence proposing a specific candidate for Dark Matter (DM) in the universe. The contribution discusses the ongoing searches of possible exotic decays: H→Z( Zd) Zd → 2l2j where Zd is a dark vector bo son, including additional scalar S (mS ≠ mH) that decays to 2l2j via two dark vector boson states Zd. The search uses proton-proton collision data collected wit the ATLAS detector at the LHC with an integrated luminosity of 139 fb-1 at the center-of-mass energy of 13 TeV.   

Phenomenology of the 2HDM model with triplet at LHC

I will present an brief overview of the the two Higgs doublet model extended by a triplet scalar (2HDMcT). Phenomenology of the 2HDMcT 's Higgs sector will be discussed within the model parameter space delimited by theoretical constraints and current experiments limits from LHC. Salient results of the Higgs associated production with a photon at linear collider will be also discussed.   

Meteor Source Tracing: Robust Method in the Moroccan Meteor Network

This presentation explores advancements in the methodology of the Moroccan meteor observation network, specifically tailored for robustly linking observed meteors to their parent bodies. Established in 2012, the network strategically deploys cameras across diverse regions of Morocco, prioritizing photometric analyses, precise orbit computations, and the establishment of unequivocal connections to the parent bodies of meteors. The primary focus of this presentation lies in clarifying the complexity of the network's sophisticated linking methodology, showcasing its effectiveness in precisely identifying meteor origins. Evolving through collaborative endeavors, the network stands as a reliable and innovative platform for unraveling celestial phenomena. A compelling example will be presented, underscoring the network's ability to predict potential impact zones on Earth, thereby contributing significantly to our understanding of the dynamic interaction between meteoroids and our planet.   

Searches for Dark Matter and parasitic collisions with the ATLAS Experiment

The existence of dark matter (DM) is carried by a variety of astrophysical measurements, however the nature and properties of the DM are still largely unidentified. The presence of DM is not predicted by the Standard Model (SM), but many theories beyond the Standard Model (BSM) offer the study of DM. Weakly Interacting Massive Particles (WIMPs, denoted as χ) are frequently used as candidates in several of these theoretical models. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the Large Hadron Collider (LHC) experiments, escaping the detector and leaving a WIMPs are potentially pair-produced in pp collisions at the Large Hadron Collider (LHC).To identify events with DM, additional SM particle(s) (Z,W and h bosons, jet, quarks...) need to be produced in association with DM in a pp collision. The above-mentioned searches, as well as resonance searches looking for mediators decaying into SM particles, are interpreted in the context of so-called Two-Higgs-Doublet Model (2HDM) with a pseudo-scalar mediator (2HDM+a), and Simplified model for dark matter production with a spin-1 mediator. Many interesting results using the LHC Run 2 pp collision data collected at 13 TeV with an integrated luminosity of 139fb−1 have been achieved. In this presentation, our focus lies on exploring the search for Z bosons decaying leptonically alongside a substantial amount of missing transverse energy (E_miss T ), as well as investigating the quest for a low-mass Z' dark matter mediator decaying into two muons. In addition to discussing the searches for dark matter, I will also provide a brief overview of my qualification task within the ATLAS collaboration. This task involved the simulation of parasitic collisions: collisions that happen with other bunches outside the main colliding ones. As an example, collisions with the following bunch at 25 ns would appear to come with a Z offset of 3.75m. Using MC simulations, it would be possible to observe the distributions of key variables (from tracks and energy deposits) for such events at various distances.