The MAinz Gas Injection Target EXperiment (MAGIX) will be operated at the Mainz Energy-Recovering Superconducting Accelerator (MESA), performing high-precision electron scattering experiments on a variety of targets, ranging from hydrogen to argon.
The setup includes a windowless gas jet target, followed by two high-resolution magnetic spectrometers that focus the scattered electrons onto...
We present a practical approach for implementing the overlap Dirac operator in lattice QCD that combines the Kenney-Laub (KL) rational iterates for approximating the matrix sign function, their partial fraction decomposition enabling Multi-Shift Conjugate Gradient solvers, and the parameter-free Brillouin operator as kernel. This method requires no spectral information, avoiding the costly...
In this presentation I will show how we can constrain Dark Matter (DM) scenarios with the supernova remnant HESS J1731-347. We assume the compact object to be an admixture of DM and Neutron Star, and presume the former to behave as a free Fermi gas. For the Neutron Star we use recently calculated regulator-independent equations of state for neutron stars obtained from first principles. Using...
We perform a global analysis of negative-strangeness meson–baryon scattering using lattice QCD and experimental data within the Chiral Unitary Approach. The lattice data are analyzed via the Lüscher formalism, including coupled channels. Systematic uncertainties from data limitations, ambiguities, and framework dependence are quantified using statistical tools. We present pole positions for...
Quantum computing uses principles from quantum mechanics that might solve certain problems that classical computers find very hard or slow to handle. It can be especially helpful in areas like optimization, cryptography and simulating quantum systems. A key aspect of this is quantum coherence, we discuss the role of resource theory in understanding the potential power of quantum computing....
The P2 experiment at the future MESA accelerator in Mainz plans to measure the weak mixing angle $\sin^2(\theta_W)$ in parity violating elastic electron-proton scattering. The aim of the experiment is a very precise measurement of the weak mixing angle with an accuracy of $0.14\%$ at a low four-momentum transfer of $Q^2=4.5\cdot 10^{-3} \ \mathrm{GeV^2}$. In order to achieve this accuracy, it...
The P2 experiment aims to precisely measure the weak mixing angle $\sin^2\theta_W$ through parity-violating electron-proton scattering at low momentum transfer. This is projected to achieve a relative precision of $0.14\%$ for $\sin^2\theta_W$. A crucial component of the experiment is a $60 \, \text{cm}$ long liquid hydrogen ($\text{lH}_2$) target. It is designed to handle a heat load of $4000...
In the ongoing search for light dark matter, the DarkMESA and NuDoubt$^{++}$ experiments have combined their efforts to probe a new region of parameter space. DarkMESA is a forthcoming electron beam dump experiment to be located in the new MESA accelerator facility in Mainz, designed to detect light dark matter particles mediated by a hypothetical dark photon $\gamma’$ with the use of a...
Inclusive processes pose a long-standing challenge for lattice QCD due to their inherently multi-hadron nature and the need to access fully summed final states. Here, we demonstrate how first-principles methods can now overcome these obstacles through spectral reconstruction techniques. We present a first-principles lattice QCD study of the inclusive semileptonic decays of the $D_s$ meson,...
The fusion barrier studies at energies around the Coulomb barrier have been a topic of great interest. At these energies, the coupling between relative motion and internal degrees of freedom of colliding heavy ions is strongly affected, which results in a number of distributed barriers instead of a single barrier (Bfus) [1-6]. A barrier distribution (BD) can be extracted experimentally from...
The P2 experiment aims for a high precision measurement of the weak mixing angle, a fundamental parameter of the Standard Model. The weak mixing angle will be extracted from the parity-violating asymmetry in elastic electron-proton scattering at low momentum transfer, with an expected raw asymmetry of $A_\text{raw} = 0.2403\times 10^{-7}$. The central component of the detector system is an...
We assess the potential of using deuteron photodisintegration around the neutron quasi-free peak as a dual-purpose experiment to simultaneously constrain neutron polarizabilities and probe physics beyond the Standard Model. Such a combined approach would uniquely tackle two distinct research programs simultaneously: nucleon electromagnetic structure and searches for light new physics.
The...
We present a lattice QCD study of $DD_s$ scattering in the $J^P = 0^+$ channel employing a newly proposed finite-volume Hamiltonian method using the Lippmann-Schwinger equation formulated in the plane-wave basis. This novel approach provides a direct way to analyze two-hadron interacting systems without relying on the traditional Lüscher formalism formulated in the partial-wave basis. From the...
Precision calculations from lattice Quantum Chromodynamics (QCD) play a crucial role in connecting the theory of strong interactions to experimental measurements. A central challenge is controlling statistical uncertainties in correlation functions. We explore the use of Low Mode Averaging (LMA), a noise reduction technique that exploits the low-lying eigenmodes of the Dirac operator to...
We determine the nucleon axial, scalar and tensor charges at the continuum limit by analyzing three $N_f=2+1+1$
twisted mass fermion ensembles with all quark masses tuned to approximately their physical values. We include all contributions from valence and sea quarks. We use the Akaike Information Criterion to evaluate systematic errors due to excited states and the continuum...
We present the first lattice QCD determination of the Λ → N vector and axial-vector form factors, which are essential inputs for studying the semileptonic decay Λ → pℓν¯ℓ. This channel provides a clean, heoretically controlled avenue for extracting the CKM matrix element |Vus| from the baryon sector. Our analysis uses a gauge ensemble with physical light, strange, and charm quark masses and...
In this work, we propose the formalism of subtracted dispersion relations for virtual Compton scattering (VCS) off a proton target as a tool for extracting generalized polarizabilities (GPs) of the proton. This approach offers advantages over the one based on unsubtracted dispersion relations used so far in interpreting the data, particularly in reducing the model dependence.
In this...
The MAinz Gas Injection Target EXperiment (MAGIX) experiment at the
Mainz Energy-Recovering Superconducting Accelerator (MESA) requires precise event selection and background supression. This poster presents the dedicated Trigger Veto System developed for that purpose.
The MAGIX setup consists of a windowless gas jet target, followed by two high-resolution magnetic spectrometers that focus...
We present a calculation of the second, third and fourth Mellin moments of the pion and the kaon in lattice QCD. We use one ensemble of gauge configurations with two degenerate light, the strange and charm quarks with masses tuned to their physical ones. The renormalization is carried out non-perturbatively using RI-MOM and the values at given at a scale of 2 GeV in the $\bar{MS}$ scheme. We...
The Mellin moments can be used to construct parton distribution functions that are essential for phenomenology. Since they are non-perturbative quantities, they are challenging to compute. Lattice QCD provides the frame to compute generalized form factors (GFFs) providing these moments and unveil the polynomiality structure of generalized parton distributions. In this work, we present the...
We present a lattice QCD analysis of unpolarised generalised parton distri-
butions (GPDs) of the proton. Our calculations are done on an ensamble with
Nf = 2 + 1 + 1 (degenerate light quarks, strange and charm quarks) twisted
mass fermions at physical mass with a clover improvement and lattice spacing
a = 0.08 fm. We use Large Momentum Effective Theory (LaMET) to anlayse
and match the...
