W, Z, and QCD

The analyses of W and Z vector bosons, photon, and jets production have been carried out by the ATLAS and CMS collaborations using datasets collected during LHC Run 2, comprising from 36.3 fb−1 to 140 fb−1. Unfolded differential production cross sections as well as event shape observables have been measured, allowing to achieve tests of perturbative quantum chromodynamics, extractions of fundamental parameters of the Standard Model, and constraints on parton density functions

Study of central exclusive production processes by proton-proton collisions at s√=13 TeV with the CMS experiment

In this paper the reader is introduced to the physics of central exclusive production (CEP) processes. Furthermore, an overview of many CEP processes studied with the CMS experiment during Run2 will be given, including tt- , e-e+, u-u+ and TT central exclusive production

The physics of ultra-high-energy cosmic rays in the context of the Pierre Auger Observatory: Main results and future perspectives

For almost 20 years, the Pierre Auger Observatory has studied ultra- high-energy cosmic rays (UHECRs) using its unique hybrid design, which employs a ground array of water-Cherenkov detectors along with 27 fluorescence telescopes to observe extensive air showers with different, complementary techniques. Some fundamental results include measurements of the energy spectrum, of the primary mass composition and of the arrival directions with unprecedented accuracy. Al- though no specific source has been pinpointed yet, these findings have significantly improved our understanding of UHECR and set the stage for the upgrade of the experimental setup, called AugerPrime, currently under finalization

Studies of Higgs boson pair production at the LHC

The most recent results of the ATLAS and CMS searches for Higgs boson pair production at the LHC using the full Run-2 data collected in proton-proton collisions at a center-of-mass energy of Vs = 13 TeV with an integrated luminosity of about 140 fb -1 are presented. The focus is on the analyses of most sensitive di-Higgs channels, bb-bb- , bb-yy- , and bb-TT, and their combination is in the non-resonant context, and a brief overview on the resonant processes and projections for the future data taking LHC runs are discussed

Study of Gamow-Teller giant resonance in 11Li drip-line nucleus

Gamow-Teller (GT) transitions in an exotic neutron-rich nucleus 11Li have been measured via the 11Li(p,n)11Be reaction at 182 MeV/u in inverse kinematics at RI Beam Factory (RIBF) of RIKEN Nishina Center. The neutron detector array PANDORA and the SAMURAI spectrometer were used to detect recoil neutrons and decay products produced in the (p,n) reaction, respectively. Preliminary results of kinematic correlation of recoil neutrons, corresponding to GT transitions, are presented for several decay channels of 11Be reaction product. Four- teen decay channels with light-particle emission from 11Be excited states, including seven new channels, are identified, in addition to the non-particle-emission channel from 11Be ground or low-lying states

Preface

Abstract not availabl

Study of the pygmy dipole resonance using neutron inelastic scattering at GANIL-SPIRAL2/NFS

The pygmy dipole resonance (PDR) has been the subject of numer- ous studies, both experimental and theoretical. Indeed, the study of the PDR has been and still is of great interest since it allows to constrain the symmetry energy, an important ingredient of the equation of state of nuclear matter that describes the matter within neutron stars. Moreover, the PDR is predicted to play a key role in the r-process via the increase of the neutron capture rate. However, despite numerous experiments dedicated to the study of the PDR, a consistent description is still missing. In this context, we have proposed to study the PDR using a new probe: the neutron inelastic scattering reaction (n,n’γ). An experiment to study the pygmy resonance in 140Ce using the (n,n’γ) reaction has been performed in Septem- ber 2022. This experiment has been made possible thanks to the high-intensity proton beam of the new accelerator SPIRAL2 at GANIL and the NFS (Neutron For Science) facility. The experimental setup was composed of the new generation multi-detectors PARIS, for the detection of γ-rays coming from the de-excitation of the PDR, and MONSTER, for the detection of scattered neutrons. In this article, the experiment motivation and description are presented

Anomaly Detection search for new resonances decaying into a Higgs boson and a generic new particle X in hadronic final states using s√=13 TeV pp collisions with the ATLAS detector

A search is presented for heavy resonances decaying into a Higgs boson (H) and a new particle (X) in a fully hadronic final state with the ATLAS detector at the CERN Large Hadron Collider (LHC) (ATLAS Collaboration, JINST, 3 (2008) S08003). The full Run II of LHC is analyzed, corresponding to an integrated luminosity of 139 fb−1. A novel discovery signal region is imple- mented based on a jet-level anomaly score for signal model-independent tagging of the boosted X boson, representing the first application of fully unsupervised machine learning to an ATLAS analysis. No significant deviation from the SM is observed, so the results are interpreted in upper limits at 95% of confidence level (C.L.) on the production cross section σ(pp → Y → XH) (ATLAS Collaboration, Phys. Rev. D, 108 (2023) 052009)

Mechanical design of the interaction region of the Future Circular Collider e+e− and support structural optimization

We describe the vacuum chamber of the Future Circular Collider e+ e− interaction region, the conceptual design of the bellows and the lightweight structure called Support Tube. We also present a study on the structural optimization of the support structure. The aim is to optimize the structure to reduce the mass, maintaining the stiffness needed. Finite element analysis is used to develop a detailed numerical model considering complex geometries, material properties, and loading conditions. The study seeks to identify design improvements using optimization algorithms, such as Solid Isotropic Material with Penalization, Generative Design and Lattice approach

Isoscalar giant monopole resonance in Mo-100: TDHF calculations and ground state deformation

The isoscalar giant monopole resonance in molybdenum-100 has been measured in recent alpha scattering experiments and its strength function extracted. By performing time-dependent Hartree-Fock calculations with Skyrme effective interactions, we are able to reproduce the gross features of the observed strength. The details of the structure are found to be dependent on the ground state shape. We use a measure of fit to determine which ground state shape correlates with the observed strength and find evidence for triaxiality in this nucleus