ASFAP Particle Physics Day - PhD and postdocs day

Contribution List

9. Welcome

Edith Zinhle Buthelezi (iThemba LABS, National Research Foundation (ZA)), Mohamed Chabab (Cadi Ayyad University (MA)), Yasmine Sara Amhis (IJCLab (Orsay))

27/05/2022, 10:00

1. Searches for top-antitop quark resonances at √s = 13 TeV with the ATLAS detector

Badr-eddine Ngair (Mohammed V University in Rabat, Faculty of Science. Morocco)

27/05/2022, 10:05

A search for resonances produced in 13 TeV proton-proton collisions and decaying into top-quark pairs is described. In this talk events where the top-quark decay produces a single isolated charged lepton, missing transverse momentum and jet activity compatible with a hadronic top-quark decay recorded with the ATLAS detector at the Large Hadron Collider are considered. We investigate the...

3. Jet energy scale and resolution in the High-Granularity Timing Detector in ATLAS upgrades at HL-LHC

Asmaa Aboulhorma (Universite Mohammed V (MA))

27/05/2022, 10:25

The large increase of pileup is one of the main experimental challenges for the High Luminosity-Large Hadron Collider (HL-LHC) physics program. HL-LHC is expected to start in 2027 and to provide an integrated luminosity of 3000fb-1 in ten years, a factor 10 more than what will be collected by 2023. A powerful new way to address this challenge is to exploit the time spread of the interactions...

4. New charged Higgs boson discovery channel at the LHC

Mr Mohammed Boukidi (Cadi Ayyad University, Marrakech)

27/05/2022, 10:45

The ATLAS and CMS experiments have an ambitious search program for charged Higgs bosons. The two main searches for $H^\pm$ at the LHC have traditionally been performed in the $\tau \nu$ and $t b$ decay channels, as they provide the opportunity to probe complementary regions of the Minimal SuperSymmetric Model (MSSM) parameter space. Charged Higgs bosons may decay also to light quarks, $H^\pm...

5. Charged Higgs boson at the LHC in the 2HDM

Mohamed Krab

27/05/2022, 11:15

In this talk, we discuss the charged Higgs boson searches at the Large Hadron Collider (LHC) in the Two-Higgs Doublet Model (2HDM). After considering all available experimental and theoretical constraints, we review the possible processes that would enable the detection of such a particle with a mass below the top quark mass. We find the signature arising from a charged Higgs boson decaying...

6. Laser-assisted processes in standard model and beyond

Ms Mohamed OUHAMMOU (USMS)

27/05/2022, 11:35

In this work, we have theoretically studied the neutral Higgs pair production in Two Higgs Doublet Model (THDM) in the presence of a circularly polarized laser field. The laser-assisted differential partial cross section is derived in the centre of mass frame at the leading order including Z diagram. The total cross section is computed numerically by integrating the differential cross section...

8. Search for VV resonances with the ATLAS detector

Yassine El Ghazali (Ibn-Tofail University, Kenitra (MA))

27/05/2022, 11:55

Many theories beyond the standard model predict new phenomena which decay to pairs of $W$ and $Z$ bosons. This talk summarizes results for these resonances in semileptonic final states in which one boson decays leptonically and the other boson decays hadronically, using full Run 2 data-sets collected with the ATLAS detector at the LHC between 2015 and 2018 at a center of mass energy of...

11. Search for Higgs boson decays to beyond-the-Standard-Model light bosons in four-lepton final states with the ATLAS detector at the LHC

Zainab Soumaimi (Universite Mohammed V (MA))

27/05/2022, 12:15

Hidden sector or dark sector states appear in many extensions to the Standard Model (SM), to provide particle mediators for dark matter in the universe. A new probe of this hypothetical hidden or dark sector may have become available at the energy frontier opened up by the LHC with the Higgs boson and its distinct couplings to SM particles. A search is conducted for a beyond-the-Standard-...

7. Search for invisible Higgs bosons produced via vector boson fusion at the LHC using the ATLAS detector

Mr Mohamed Zaazoua (Universite Mohammed V (MA))

A variety of astrophysical observations showed direct evidence for the existence of dark matter which accounts for about 85\% of matter in the universe and does not interact with ordinary matter, except through gravity. Despite its abundance, dark matter particles are very elusive and hard to spot and no experiment confirmed their existence.
Many studies are in hunt for these elusive dark...

2. Sensitivity to longitudinal vector boson scattering in same sign WW events at a 100 TeV proton-proton collider

Ms Chilufya Mwewa (Brookhaven National Laboratory (US))

The Vector Boson Scattering (VBS) process of massive vector bosons is predicted by the Standard Model (SM) as being sensitive to ElectroWeak Symmetry Breaking (EWSB). Prior to EWSB, all vector bosons are massless and have transverse polarization states. However, after EWSB, $W$ and $Z$ bosons become massive and gain an extra polarization state - the longitudinal polarization, whereas photons...