88. A Low-Material Time Projection Chamber for MAGIX

Lucie Bister (JGU, Institute for Nuclear Physics)

Poster

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...
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68. A Practical Approach to the Overlap Operator on the Lattice. The Kenney-Laub Rational Approximation

Stylianos Gregoriou (The Cyprus Institute)

Poster

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...
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7. Analyzing Fermionic Dark Matter Scenarios with the HESS J1731-347 Compact Object

Yaiza Cano (Universidad de Alcalá de Henares)

Poster

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...
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71. Bridging Lattice QCD and Experiment: Universal Parameters of the Λ(1380), Λ(1405), and Isospin Partners

Ferenc Pittler (The Cyprus Institute)

Poster

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...
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47. Coherence: a Resource for Quantum Algorithms in Quantum Computing

Syed Muhammad Ali Hassan (The Cyprus Institute)

Poster

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....
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34. Design of a luminosity monitor for the P2 parity violating experiment at MESA

Tobias Rimke (Institut für Kernphysik Uni Mainz)

Poster

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...
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38. Design of the liquid hydrogen target for the P2 parity violating experiment at MESA

Jayanta Kumar Naik (Johannes Gutenberg University of Mainz)

Poster

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...
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27. Development of a Liquid Scintillator Veto Prototype for the DarkMESA and NuDoubt++ Experiments

Michail Kontogoulas (Institute for Nuclear Physics, Johannes Gutenberg University Mainz)

Poster

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...
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32. Experimental Manifestation of the Neutron - Electron Interaction in Solids via Measurement it Dependence on the Distance between Nucleons

Vladimir G Plekhanov

Poster

Experimental Manifestation of the Neutron - Electron Interaction in Solids via Measurement it Dependence on the Distance between Nucleons

V.G. Plekhanov

Fonoriton Sci. Lab., Garon Ltd, Estonia
Abstract. Yet, the energy scale associated with new physics (NP) is unknown and therefore the experimental program for physics beyond Standard Model (SM) should be as broad as possible....
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41. First measurement of the DVCS beam spin asymmetry in the Sullivan process

Elouan Ferrand (CEA/Irfu/DPhN)

Poster

Deeply Virtual Compton Scattering (DVCS) is a powerful tool to investigate the internal structure of hadrons in terms of Generalized Parton Distributions (GPDs). The Sullivan process, involving the exchange of a virtual pion from the proton’s meson cloud, offers a unique opportunity to access the three-dimensional structure of the pion at high energies. Since the pion plays a central role in...
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83. First principles lattice QCD calculation of inclusive semileptonic decays of the Ds meson

Antonio Evangelista (University of Cyprus)

Poster

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,...
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77. Gluonic Origin of Visible Mass: Lattice QCD Baryon Mass Decomposition

Bolun Hu (The Cyprus Institute)

Poster

The masses of visible matter arise from both the Higgs mechanism and strong interactions, yet how six Higgs-generated quark masses and flavor-neutral gluons jointly determine the hadron spectrum remains unclear. Using state-of-the-art lattice QCD with controlled continuum and infinite-volume extrapolations, we predict ground-state spin-1/2 and spin-3/2 baryon masses containing light, strange,...
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6. Investigating the coupling effects using Quasi-elastic scattering for 14N+176Yb system

Gobind Ram (University of Lucknow, Lucknow, India)

Poster

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...
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37. Investigations of the integrating readout system of the P2 experiment at MESA

Moran Neher (Institut für Kernphysik, JGU Mainz)

Poster

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...
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82. Joint neutron-polarizability extraction and dark-sector search using deuteron photodisintegration

Cornelis Mommers (Johannes Gutenberg University Mainz)

Poster

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...
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49. Lattice Study of $cc\bar{u}\bar{s}$ tetraquark channel in $D^{(*)}D^{(*)}_s$ scattering

Mr Priyajit Jana (University of Cyprus)

Poster

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...
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109. Low-Mode Averaging for Precision Lattice QCD Correlation Functions

Christian Schneider (University of Cyprus)

Poster

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...
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3. Moments of parton distributions functions from Lattice QCD

Dimitra Pefkou (UC Berkeley)

Poster

The parton distribution functions (PDFs) are crucial to the understanding of the internal structure of hadrons, and their precise determination is necessary for searches of BSM physics in collider experiments. Directly accessing PDFs in Lattice QCD calculations is impossible due to the Euclidean space-time geometry. Mellin moments of PDFs are defined in terms of local operators that can be...
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50. Multiphoton-assisted α-tunneling in deformed SHN driven by X-ray field

Shubham Bharmoria

Poster

We develop the Floquet-Volkov formalism for the multiphoton ionization process grounded in a microscopic phenomenological approach that incorporates the Skyrme force model within the Wentzel-Kramers-Brillouin (WKB) approximation to calculate the α-particle’s penetration probabilities in the deformed SHN subjected to an intense X-ray laser field. Our findings reveal that such high-intensity...
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23. Noise Reduction for DarkMESA in the Search for Light Dark Matter

Christian Stoß

Poster

The existence of dark matter remains one of the most significant open questions in particle physics. The DarkMESA experiment aims to search for light dark matter (LDM) in an unexplored mass and coupling regime. This parasitic beam dump experiment will be located downstream of the P2 experiment at the new MESA accelerator in Mainz. It is planned to operate for 10,000 hours in extracted beam...
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39. Nucleon axial, tensor, and scalar charges and $\sigma$-terms in lattice QCD

Christos Iona (University of Cyprus and The Cyprus Institute)

Poster

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...
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78. Proton and neutron electromagnetic form factors from lattice QCD in the continuum limit.

Bhavna Prasad

Poster

We present the results for the electromagnetic form factors of the proton and neutron using lattice QCD. We employ three ensembles of twisted mass fermions with two degenerate light, a strange, and a charm quark with masses tuned to their physical values. Studying the momentum transfer dependence of the form factors resulting from a multi-state fitting procedure, we obtain the electric and...
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8. Proton charge radius extraction from muon scattering at MUSE using dispersively improved chiral effective field theory

Dr Fernando Gil Dominguez (UESTC)

Poster

The MUSE experiment at the Paul Scherrer Institute will measure low-energy muon-proton elastic scattering (muon momenta: 115--210 MeV) to determine the proton charge radius. This talk discusses the prospects for extracting the radius using dispersively improved chiral effective field theory (DI$\chi$EFT), which connects the proton's charge distribution to the form factor behavior while...
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46. Proton leading scalar and spin polarisabilities from proton Compton scattering data

Timon Esser

Poster

We present the results of a partial wave analysis of the global real Compton scattering (RCS) database, extracting the leading scalar and spin polarisabilities of the proton. Exploring the nucleon using electromagnetic probes reveals a fine and intricate interplay between its various structural properties. As an example, the nucleon polarisabilities encode the two-photon response, such as...
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74. Quark and Gluon Momentum Fractions in the Nucleon

Yan Li (The Cyprus institute)

Poster

We present the full decomposition of the momentum fraction carried by quarks and gluons in the nucleon. We employ three gauge ensembles generated with Nf=2+1+1 Wilson twisted-mass clover-improved fermions at the physical quark masses. It allows us to determine for the first time the momentum decomposition at the continuum limit with the extrapolation directly performed at the physical pion mass.
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36. Study of the Λ → pℓν¯ℓ semileptonic decay in lattice QCD

Andreas Konstantinou (University of Cyprus)

Poster

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...
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29. Subtracted dispersion relations formalism for virtual Compton scattering off the proton

Matteo Ronchi (Johannes Gutenberg University)

Poster

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...
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87. The MAGIX Trigger Veto System

Hannah Kessler (JGU, Institute for Nuclear Physics)

Poster

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...
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48. The Mellin Moments of the Pion and the Kaon

Luis Alberto Rodriguez Chacon (The Cyprus Institute)

Poster

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...
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70. The nucleon’s generalized form factors and Mellin moments up to fourth order

Christian Kummer (University of Cyprus)

Poster

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...
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42. Unpolarised Generalised Parton Distributions on lattice QCD at physical mass

Gabriele Pierini (The Cyprus Institute, TU Berlin)

Poster

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...
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