Conveners
Hadronic and nuclear spectrum and interactions
- Takumi Doi
Hadronic and nuclear spectrum and interactions
- Felipe Ortega Gama (UC Berkeley)
Hadronic and nuclear spectrum and interactions
- Luchang Jin (Univeristy of Connecticut)
Hadronic and nuclear spectrum and interactions
- Archana Radhakrishnan
Hadronic and nuclear spectrum and interactions: I
- Patrick Oare (Brookhaven National Laboratory)
Hadronic and nuclear spectrum and interactions: II
- Maxim Mai (University of Bern)
Hadronic and nuclear spectrum and interactions: I
- Sebastian Dawid (Indiana University Bloomington)
Hadronic and nuclear spectrum and interactions: II
- John Bulava
Hadronic and nuclear spectrum and interactions
- Rajnandini Mukherjee (University of Edinburgh)
Hadronic and nuclear spectrum and interactions
- Sinya Aoki
Hadronic and nuclear spectrum and interactions: I
- Michael Wagman
Hadronic and nuclear spectrum and interactions: II
- Andrew Jackura (William & Mary)
Hadronic and nuclear spectrum and interactions
- Joseph Moscoso (UMD CP)
-
Juan Andres Urrea Nino (Trinity College Dublin)27/07/2026, 14:003Hadronic and nuclear spectrum and interactionsContributed talk
Constructing hadron creation operators which properly sample the finite-volume energy spectrum is a fundamental step in lattice QCD spectroscopy and scattering calculations. Operators enabling access to spectrum information from correlation functions at early temporal separations are extremely advantageous, particularly when the signal-to-noise problem is severe. We present improved operator...
Go to contribution page -
Nilmani Mathur (Tata Institute of Fundamental Research)27/07/2026, 14:201Hadronic and nuclear spectrum and interactionsContributed talk
We introduce a novel quark smearing method designed to project the quark field onto a low-energy subspace efficiently. This smearing method is employed to compute sparse estimators of multi-hadron correlation functions. While the signal for the ground state is found to be the same as obtained from full correlation functions, the computational cost is drastically reduced. Furthermore, we...
Go to contribution page -
John Bulava27/07/2026, 14:402Hadronic and nuclear spectrum and interactionsContributed talk
We present a suite of software for every part of the workflow for evaluating correlation functions on an ensemble of gauge configurations: the construction of irreducible hadron operators, the enumeration of Wick contractions, and the resultant tensor contractions. The workflow is illustrated for correlators between one-, two- and three-hadron operators present in the excited nucleon spectrum...
Go to contribution page -
Luchang Jin (Univeristy of Connecticut)27/07/2026, 15:004Hadronic and nuclear spectrum and interactionsContributed talk
We present a noise reduction technique for disconnected diagrams in lattice QCD correlation functions, using the $\eta$ meson as an illustrative example. The method constructs a noise-reduced interpolating operator by subtracting a truncated-gauge-configuration estimate of the disconnected contribution. The truncated configuration restricts the gauge field to a finite time-slice window around...
Go to contribution page -
Sinya Aoki27/07/2026, 15:201Hadronic and nuclear spectrum and interactionsContributed talk
A systematic framework for constructing optimized interpolating operators strongly coupled to QCD two-particle states is developed, which is achieved by incorporating inter-hadron spatial wavefunctions. To efficiently implement these operators in lattice QCD, a novel quark smearing technique utilizing noise vectors is proposed. Applied to the $\Omega_{ccc}\Omega_{ccc}$ system, these optimized...
Go to contribution page -
Ian Van Schalkwyk27/07/2026, 16:101Hadronic and nuclear spectrum and interactionsContributed talk
The accurate determination of the electromagnetic form factor of the pion ($F_\pi (Q^2)$) is of direct phenomenological relevance for upcoming experiments and understanding the transition between non-perturbative and perturbative QCD. Calculations of $F_\pi (Q^2)$ using Lattice QCD have traditionally presented significant challenges. We present new calculations from the QCDSF collaboration of...
Go to contribution page -
Mr Gabriele Morandi (Universitร degli Studi di Milano - Bicocca)27/07/2026, 16:302Hadronic and nuclear spectrum and interactionsContributed talk
In this work we present the first determination of the time-like isovector two-pion form factor from Lattice QCD from an infinite-volume approach based on inverse-problem techniques. Starting from a three-point correlation function involving the vector current and two temporally displaced pion interpolating operators, we reconstruct the spectral density related to the $\gamma\to\pi\pi$...
Go to contribution page -
Luka Jevsenak (University of Ljubljana, Faculty of Mathematics and Physics)27/07/2026, 16:50Hadronic and nuclear spectrum and interactionsContributed talk
We determine the physical pole position of the $\rho$ resonance in $\pi\pi$ scattering using four gauge-field ensembles with 2+1 dynamical quark flavors implemented with a clover improved Wilson action. The ensembles have pion masses $m_\pi = 317,\ 296,\ 174,\ 291$ MeV and lattice spacings $a = 0.114,\ 0.090,\ 0.088,\ 0.068$ fm. For each ensemble, we obtain the $\pi\pi$ energy spectra for...
Go to contribution page -
Jakob Hoffmann (Goethe University, Frankfurt)27/07/2026, 17:10Hadronic and nuclear spectrum and interactionsContributed talk
In this talk, we present a finite-volume scattering formalism to study temporal size effects on hadronic resonances using lattice QCD. We use the concept of thermoparticles to derive a finite-temporal size two-particle quantization condition which relates scattering amplitudes to two-particle energies computed in a finite spatial and temporal volume.
Go to contribution page -
Matteo Saccardi (Colorado State University)28/07/2026, 14:006Hadronic and nuclear spectrum and interactionsContributed talk
Spectral densities encode key QCD observables, including hadronic decay rates, cross sections, and transport properties of the quark-gluon plasma. Their Laplace transform corresponds to Euclidean correlation functions, which can be accessed non-perturbatively from first-principles lattice QCD. In this talk, we present analytic formulae to carry out the inverse Laplace transform so as to...
Go to contribution page -
Diego Toniolo (University of Milan-Bicocca)28/07/2026, 14:202Hadronic and nuclear spectrum and interactionsContributed talk
Spectral densities encode key QCD observables, including hadronic decay rates, cross sections, and transport properties of the quark-gluon plasma. Their Laplace transform corresponds to Euclidean correlation functions, which can be accessed non-perturbatively from first-principles lattice QCD. Building on our formalism describing how spectral functions can be reconstructed from integral...
Go to contribution page -
Davide Laudicina (Ruhr Universitรคt Bochum)28/07/2026, 14:406Hadronic and nuclear spectrum and interactionsContributed talk
We present a strategy, based on spectral reconstruction techniques, to extract ground-state energies of Euclidean correlators from smeared observables. The reconstruction acts as a filter on the higher-lying spectrum, suppressing excited-state contamination with respect to the original correlator. The residual contamination is controlled by the smearing hyperparameters, providing an...
Go to contribution page -
Francesca Argia Bresciani (University of Milano-Bicocca)28/07/2026, 15:007Hadronic and nuclear spectrum and interactionsContributed talk
We present a general framework for quantifying finite-volume effects on smeared spectral densities and apply the result both formally and numerically to the vector-vector channel. Using two independent approaches โ finite-volume corrections to Euclidean two-point functions and the Lellouch-Lรผscher-Meyer formalism โ we show that the leading dependence on the box size is exponentially suppressed...
Go to contribution page -
Ryutaro Tsuji (KEK)28/07/2026, 15:203Hadronic and nuclear spectrum and interactionsContributed talk
Reconstructing spectral densities from lattice correlators requires an inverse Laplace transform, which is inherently ill-conditioned. Although there are many approaches to tackle this problem, systematic errors need to be carefully examined. In this talk, we propose a method with a singular value decomposition of the Laplace kernel, in which systematic error can be bounded under reasonable...
Go to contribution page -
Klemen Kersic (ETH Zรผrich)28/07/2026, 16:107Hadronic and nuclear spectrum and interactionsContributed talk
Due to the long-range nature of QED, finite-volume corrections to observables appear as inverse powers of lattice extent, which may be much larger than the exponentially suppressed corrections. For precision computations, it is crucial to determine these effects, which depend on the QED formulation. As a first step, we investigate the power-law finite-volume effects in the QCD+QED setup with...
Go to contribution page -
Paola Tavella (ETH Zรผrich)28/07/2026, 16:309Hadronic and nuclear spectrum and interactionsContributed talk
Finite-volume effects constitute one of the main sources of systematic uncertainty in lattice determinations of the hadronic vacuum polarization (HVP) contribution to the muon's $g-2$. In this talk, we investigate these effects in a lattice QCD setup with C$^\star$ boundary conditions. We compute the HVP intermediate-window observable on four gauge ensembles generated by the RC$^\star$...
Go to contribution page -
Harvey Byron Meyer (CERN)28/07/2026, 16:507Hadronic and nuclear spectrum and interactionsContributed talk
We present a lattice QCD calculation of the chargedโneutral pion mass splitting at O($\alpha_{\rm em}$) using a coordinate-space photon propagator regulated ร la Pauli-Villars (PV). The calculation is performed using CLS ensembles. The elastic contribution receives a dedicated treatment to reduce finite-size effects and speed up the approach to infinite PV cutoff. The same methods are being...
Go to contribution page -
Tian Lin (Peking University)28/07/2026, 17:102Hadronic and nuclear spectrum and interactionsContributed talk
We report a lattice QCD calculation of the neutral pion decay $\pi^0\to\gamma\gamma$ beyond the chiral limit. We develop a three-point-function strategy, based on an anomalous PCAC relation, to extract the finite-quark-mass corrections to the decay amplitude, including both isospin-symmetric and isospin-breaking effects.
Go to contribution page -
Charles Kacir (University of North Carolina at Chapel Hill)29/07/2026, 09:001Hadronic and nuclear spectrum and interactionsContributed talk
Neutrinoless double beta decay ($0\nu\beta\beta$) is the most promising low-energy probe of physics beyond the Standard Model (BSM). If experimental searches which are underway detect such decays, understanding which BSM theory best fits the data will require theoretical work to disentangle Standard Model contributions to the process from experimental measurements. The only known way to...
Go to contribution page -
Sebastian Dawid (Indiana University Bloomington)29/07/2026, 09:00Hadronic and nuclear spectrum and interactionsContributed talk
We discuss a model-independent method for determining hadronic resonances from lattice QCD, derived from the $N/D$ representation of a partial-wave two-body amplitude. The new formalism is valid for energies coinciding with arbitrary left-hand cuts of the amplitude.
Go to contribution page -
Miguel Salg (University of Bern)29/07/2026, 09:202Hadronic and nuclear spectrum and interactionsContributed talk
We present a calculation of $NN$ scattering amplitudes in both isospin states, $I = 0$ (deuteron) and $I = 1$ (dineutron), on CLS ensembles with pion masses ranging from 700 MeV down to 200 MeV. A particular focus of our analysis is on the left-hand cut arising from one-pion exchange, which induces effects not accounted for in the usual two-particle finite-volume formalism. We explore two...
Go to contribution page -
Sakura Itatani (SOKENDAI / KEK)29/07/2026, 09:20Hadronic and nuclear spectrum and interactionsContributed talk
We study vector current correlators using the singular value decomposition (SVD) of the Laplace kernel, $\exp(-\omega\tau)$, which identifies the components of the spectral function that can be reliably reconstructed from Euclidean correlator data. The vector-current correlator provides access to the spectrum of interacting two-pion states, including the $\rho$-resonance region. We test the...
Go to contribution page -
Rosemary Zielinski (Massachusetts Institute of Technology)29/07/2026, 09:40Hadronic and nuclear spectrum and interactionsContributed talk
Lattice QCD calculations of many-body nuclear systems are prohibitively expensive due to the signal-to-noise problem. An alternative framework to compute nuclear observables from first principles is to compute few-nucleon quantities and match them directly to pionless EFT to obtain LECs, which can then be used in nuclear many-body methods. This work employs pionless EFT at the physical pion...
Go to contribution page -
Jorge Baeza Ballesteros (DESY Zeuthen)29/07/2026, 09:403Hadronic and nuclear spectrum and interactionsContributed talk
A very popular choice for the fermion action used in lattice computations is the well-known $\mathcal{O}(a)$-improved Wilson action, which has been successfully employed in a wide range of applications. However, experience with this action has also revealed some of its limitations, such as the presence of small and even negative eigenvalues of the lattice Dirac operator due to the breaking of...
Go to contribution page -
Oleksiy Bazavov (Michigan State University (US))29/07/2026, 10:00Hadronic and nuclear spectrum and interactionsContributed talk
The highly improved staggered quark action (HISQ) has been in use for about two decades now in calculations ranging from the hadronic contribution to the anomalous magnetic moment of the muon to QCD thermodynamics. Large data sets have been generated that allow for well-controlled chiral-continuum extrapolations. However, a class of problems that require some form of spectral reconstruction...
Go to contribution page -
Matthias Heinz29/07/2026, 10:00Hadronic and nuclear spectrum and interactions
Computations of nuclei starting from nuclear Hamiltonians have seen significant progress in the past two decades. Such calculations start from interactions from effective field theory. The Hamiltonians are then typically expanded in a harmonic oscillator basis and solved using systematically improvable many-body methods. Calculations on a discrete position-space lattice offer a promising...
Go to contribution page -
Jun-Sik Yoo (Los Alamos National Laboratory)29/07/2026, 10:20Hadronic and nuclear spectrum and interactionsContributed talk
Results from ongoing calculations of the "nucleon charges" by the PNDME and NME collaboration are presented. These are based on preliminary data from O(7000) configurations on two physical pion mass ensembles with 2+1+1-flavor ensembles generated by the MILC collaboration at lattice spacing $a=0.087$ and $a=0.0576$ fm and 11 NME ensembles with 2+1-flavor clover action generated by...
Go to contribution page -
Wolfgang Sรถldner29/07/2026, 10:202Hadronic and nuclear spectrum and interactionsContributed talk
Within the RQCD collaboration, we are currently updating the determination of the gradient flow scale at the physical point using the $\Xi$ baryon mass as input. We utilize more than 50 CLS ensembles generated with non-perturbatively $O(a)$-improved Wilson dynamical fermions. These ensembles comprise six lattice spacings in the range of $a = 0.04-0.1$ fm, spatial volumes satisfying $L M_\pi >...
Go to contribution page -
Julian Mayer-Steudte29/07/2026, 11:10Hadronic and nuclear spectrum and interactionsContributed talk
In pNRQCD, the inclusive P-wave heavy quarkonium decay width into light hadrons factorizes at a scale $\Lambda$, and the non-perturbative contribution reduces to $\mathcal{E}_3$, an integral over the correlator of two electric fields connected by an adjoint Wilson line. This correlator is universal, independent of the specific initial state. In this work, we developed a new method that employs...
Go to contribution page -
Raphael Lehner29/07/2026, 11:102Hadronic and nuclear spectrum and interactionsContributed talk
We investigate the determination of the $s$-wave scattering length in the $O(4)$ $\phi^4$ theory in the symmetry-broken phase. The theory is simulated on a four-dimensional lattice in the strong-coupling limit with a small external symmetry-breaking term. This model provides a controlled setting for testing methods used to extract low-energy scattering observables from lattice simulations.
Go to contribution page
We... -
Mischa Batelaan (Adelaide University)29/07/2026, 11:301Hadronic and nuclear spectrum and interactionsContributed talk
We present a first-principles lattice QCD calculation of the radiative transitions of charmonium states to the light pseudoscalar mesons $\eta$ and $\eta'$. We extract the relevant transition form factors as a function of photon virtuality and connect the timelike region accessible through Dalitz decays to the real-photon point. A recurring challenge in these calculations is the appearance of...
Go to contribution page -
Rajnandini Mukherjee (University of Edinburgh)29/07/2026, 11:303Hadronic and nuclear spectrum and interactionsContributed talk
Understanding coupled-channel dynamics involving three or more particles remains a major challenge for computing hadronic scattering and decay processes on the lattice. We present a perturbative framework for describing such systems involving an arbitrary number of particles in a finite volume. Our method is valid at leading order in all $n\to m$ couplings of the theory, and incorporates the...
Go to contribution page -
Maxim Mai (University of Bern)29/07/2026, 11:502Hadronic and nuclear spectrum and interactionsContributed talk
Since its derivation, the Finite-Volume Unitarity (FVU) 3-body quantization condition became a working horse studying various phenomenologically interesting systems from lattice. This includes pi(1300), omega(782) or a1(1260).
In my talk I will review new theoretical developments and updates in view of recent and anticipation of upcoming applications from lattice QCD.
Go to contribution page -
Vilija de Jonge (Institut fรผr theoretische Physik an der Goethe Universitรคt Frankfurt am Main)29/07/2026, 11:50Hadronic and nuclear spectrum and interactionsContributed talk
We present $\text{SU}(3)$ lattice gauge theory results for the $\mathcal{O}(1/m_Q)$ hybrid spin-dependent and hybridโquarkonium mixing potentials. The only existing lattice computation of these potentials was exploratory and limited to quarkโantiquark separations below approximately $0.5\,\mathrm{fm}$. We extend the lattice determination beyond $1\,\mathrm{fm}$ using large-volume,...
Go to contribution page -
Haobo Yan (Peking University)29/07/2026, 12:104Hadronic and nuclear spectrum and interactionsContributed talk
Understanding hadron interactions from QCD is key to mapping out the resonance spectrum of the strong interaction. In recent years, lattice QCD has made significant progress in treating both two- and three-body scattering, but a description of coupled systems involving both remains lacking.
In this talk, we present a study of the isoscalar vector sector in a coupled two- and three-body...
Go to contribution page -
Felipe Ortega Gama (UC Berkeley)29/07/2026, 12:102Hadronic and nuclear spectrum and interactionsContributed talk
We extract the elastic electromagnetic transition of a two-pion $I=2$ state across the two-pion elastic energy region using lattice QCD. In particular, we determine the energy dependence of a two-particle transition from lattice QCD for the first time. The finite-volume spectrum and elastic matrix elements were calculated on a lattice with $m_\pi\approx 400$ MeV. Infinite-volume amplitudes...
Go to contribution page -
Clement Charles (University of Maryland)30/07/2026, 14:00Hadronic and nuclear spectrum and interactionsContributed talk
We present a systematic study of the finite-volume spectrum of isospin-zero two-pion scattering using lattice QCD with physical quark masses and G-parity boundary conditions. This is a reanalysis of the data used for the 2020 RBC&UKQCD calculation of $\epsilonโ$. Our main focus is the extraction of the ground-state energy, which is critical for computing the $I=0$ $K \to \pi \pi$ decay...
Go to contribution page -
Andrew Jackura (William & Mary)30/07/2026, 14:20Hadronic and nuclear spectrum and interactions
I will present a first-principles calculation within Quantum ChromoDynamics (QCD) of strongly coupled isotensor three-pion scattering amplitudes with resonating sub-channel $\rho$ mesons. Computations within lattice QCD allow for a systematic determination of the spectrum of three pions in a finite-volume. Using generalizations of the L\โuscher framework, we map the spectrum to infinite-volume...
Go to contribution page -
Jacob Sitison (University of Colorado Boulder)30/07/2026, 14:40Hadronic and nuclear spectrum and interactionsContributed talk
In this talk, we present two and three pion scattering using finite volume spectra from lattice QCD. We discuss three-pion scattering in both the maximal isospin and isotensor channels, the latter of which exhibits a $\rho$ resonant subsystem. The different three-pion channels rely on knowledge of the same two-pion subchannels with $I_{2\pi}=2,1$. We explore the importance of simultaneous fits...
Go to contribution page -
Nicholas Chambers (William & Mary)30/07/2026, 15:00Hadronic and nuclear spectrum and interactionsContributed talk
Three-body dynamics play an important role within the hadron spectrum, from familiar resonances like the omega meson to more exotic states such as the recently-discovered T_{cc} tetraquark candidate. The complete Lรผscher workflow has been formalized for a growing number of three-hadron systems, and lattice QCD calculations of these systems are underway. Given a set of lattice-determined...
Go to contribution page -
Dr Adeilton Dean Marques Valois (University of Granada)30/07/2026, 15:20Hadronic and nuclear spectrum and interactionsContributed talk
Staggered fermions comprise an important theoretical framework in modern lattice QCD calculations due to their low computational cost. However, the theory manifests highly non-trivial lattice artifacts that complicate the extraction of scattering amplitudes from finite-volume energies using the Lรผscher formalism. At non-zero lattice spacing, the meson sector of the theory contains multiple...
Go to contribution page -
Fabian Zierler (Technical University of Munich)30/07/2026, 16:101Hadronic and nuclear spectrum and interactionsContributed talk
Diquarks are colour-nonsinglet objects that have gained interest in the study of baryons, tetraquarks and other exotics. A gauge invariant way of measuring diquark properties is obtained by contracting all colour indices with static colour sources. We extend this approach from baryons to tetraquarks with two static and two light quarks, which allows directly probing diquarks in higher colour...
Go to contribution page -
Stephen Sharpe (University of Washington)30/07/2026, 16:301Hadronic and nuclear spectrum and interactionsContributed talk
I present an update on our ongoing study of the $T_{cc}^+$, based on two CLS ensembles (X252 and X253) for which $M_\pi\approx 280\,$MeV. We have determined the spectra for $DD\pi$ ($I=0$), as well as the subchannels $DD$ ($I=1$) and $D\pi$ ($I=1/2$), using a range of operators in several frames and irreps. We fit these using a combination of two- and three-particle quantization conditions,...
Go to contribution page -
Andres Stump (Humboldt-Universitรคt zu Berlin)30/07/2026, 16:50Hadronic and nuclear spectrum and interactionsContributed talk
The doubly bottom tetraquark $T_{bb}$, with $I(J^P) = 0(1^+)$, is widely expected to be a deeply bound exotic state. In contrast, much less is known about $BB^*$ scattering near and above threshold. Studying this system is challenging: one must separate the deeply bound $T_{bb}$ from the $B^{(*)}B^*$ scattering states by using both local tetraquark operators and bilocal scattering operators....
Go to contribution page -
Sipaz Sharma (Technical University Munich)30/07/2026, 17:10Hadronic and nuclear spectrum and interactionsContributed talk
We study the $Z_b$ tetraquark channel, $\bar{b}b\bar{d}u$, with quantum numbers $J^{PC}=1^{+-}$. Our approach involves calculating correlators among three operator classes: (i) static-light meson pair, (ii) quarkonium plus pion, and (iii) the novel interpolator based on BOEFT (BornโOppenheimer Effective Field Theory) proposed in Ref. [1]. We use the GEVP variational approach to extract the...
Go to contribution page -
Takumi Doi31/07/2026, 14:002Hadronic and nuclear spectrum and interactionsContributed talk
A first-principles determination of hadron interactions is one of the most important subjects in particle, nuclear, and astrophysics. In particular, the determination of hyperon forces plays a crucial role in understanding not only the structure of hypernuclei but also the equation of state of dense matter and the internal structure of neutron stars.
Go to contribution page
In this talk, we will present lattice QCD... -
Ivan Vujmilovic31/07/2026, 14:001Hadronic and nuclear spectrum and interactionsContributed talk
In this talk I will present preliminary results from an ongoing study of coupled $DD^* - D^*D^*$ scattering on the lattice. To obtain the finite-volume spectrum of the system we incorporate a variety of scattering interpolators in both channels, in addition to a local diquark-antidiquark operator, whose role in determining the energies of excited states for this system has recently emerged....
Go to contribution page -
Malcolm Lazarow (UC Berkeley)31/07/2026, 14:20Hadronic and nuclear spectrum and interactionsContributed talk
In this talk, I will present preliminary results for nucleon-nucleon and nucleon-hyperon scattering on behalf of the BaSc collaboration. For both systems, I will discuss the ensembles used and the extracted spectra; collaborators will focus on the nucleon-nucleon finite-volume scattering analysis in separate talks. For the $S = -1$ nucleon-hyperon portion, I will showcase the current state of...
Go to contribution page -
Archana Radhakrishnan31/07/2026, 14:201Hadronic and nuclear spectrum and interactionsContributed talk
We determine the spectra of singly- and doubly-charmed baryons on $N_f=2+1$ ensembles generated by the Coordinated Lattice Simulations (CLS) effort with non-perturbatively improved Wilson fermions. The baryon masses are calculated along three trajectories in the plane spanned by the light and strange quark masses, two of which intersect close to the physical point, and a third approaching the...
Go to contribution page -
Koichi Murase (The University of Osaka)31/07/2026, 14:40Hadronic and nuclear spectrum and interactionsContributed talk
We report the current status of first-principles lattice QCD results for the strangeness $S = -1$ sector of baryon-baryon interactions with the physical masses. We measure the two- and four-point functions on the (2+1)-flavor gauge configurations (HAL-conf-2023) [1] generated on the physical point, $(m_\pi, m_K) = (137, 502)~\mathrm{MeV}$. We calculate the Euclidean-time dependence of the...
Go to contribution page -
Jinzi Wu (The George Washington University)31/07/2026, 14:402Hadronic and nuclear spectrum and interactionsContributed talk
The Roper resonance does not fit many quark model predictions or lattice QCD calculations. One reason could be the strong three-body dynamics for this channel. The analysis of the Roper with lattice QCD requires a hadronic coupled-channel amplitude in the two- and three-body channels.
Go to contribution page
As a first step, we develop an amplitude that consistently and unitarily includes the $\pi N$ and $\pi\pi N$... -
Joseph Moscoso (UMD CP)31/07/2026, 15:00Hadronic and nuclear spectrum and interactionsContributed talk
We present a high-statistics study of nucleon-nucleon scattering in the SU(3) flavor-symmetric limit of QCD, where the light and strange quark masses are tuned to a common value corresponding to $m_\pi \approx 714$. We perform an extraction of NN scattering phase shifts across multiple partial waves using the Lรผscher finite-volume quantization condition with multiple boost frames. The...
Go to contribution page -
John Meneghini (Carnegie Mellon University)31/07/2026, 15:002Hadronic and nuclear spectrum and interactionsContributed talk
We report on our completed study of the role of tetraquark interpolating operators in the isodoublet strange $\kappa$ and isovector nonstrange $a_0(980)$ scalar channels using $N_f = 2+1$ lattice QCD at $m_\pi \simeq 230\:\mathrm{MeV}$. We compare finite-volume spectra extracted using Hermitian correlation matrices constructed with and without tetraquark operators and find substantial...
Go to contribution page -
Kotaro Murakami31/07/2026, 15:201Hadronic and nuclear spectrum and interactionsContributed talk
Kaon-nucleon (KN) interactions with the strangeness $S=+1$ provide a testing ground for comparing lattice QCD with experiments. They also play an important role in understanding the partial restoration of chiral symmetry and in clarifying whether genuine pentaquarks exist. In this study, the S-wave KN interactions are derived using the HAL QCD method with $N_f=2+1$ quark flavors at the...
Go to contribution page -
Wren Yamada (RIKEN)31/07/2026, 15:201Hadronic and nuclear spectrum and interactionsContributed talk
The $\bar D N$ system is one of the simplest hadronic systems containing an open-charmed meson and a nucleon, yet its low-energy interaction remains to be fully understood. Existing phenomenological models predict interactions ranging from sufficiently strong attraction to form a pentaquark state to weak attraction or repulsion. On the experimental side, higher-statistics LHC Run 3 data are...
Go to contribution page -
William Detmold31/07/2026, 16:102Hadronic and nuclear spectrum and interactionsContributed talk
Spectroscopy in lattice field theory begins with the choice of interpolating operators used to couple to the desired quantum numbers. Since the Hilbert spaces of bosonic theories such as lattice QCD are essentially infinite dimensional, standard spectroscopy techniques depend strongly on this choice in practice and require implicit assumptions about unphysical operator-state overlaps. More...
Go to contribution page -
Michael Wagman31/07/2026, 16:301Hadronic and nuclear spectrum and interactionsContributed talk
Multi-hadron spectroscopy is complicated by discretization and excited-state effects that must be disentangled to reliably resolve finite-volume energy differences entering quantization conditions. I will present precise constraints on baryon-baryon scattering from block Lanczos analyses of large interpolator sets, for which two-sided bounds provide constraints on the locations of LQCD...
Go to contribution page -
Lin Qiu (Old Dominion University)31/07/2026, 16:501Hadronic and nuclear spectrum and interactionsContributed talk
In this talk, I'll show our first implementation of the finite-volume $N/D$ representation to study two-baryon interactions from lattice QCD data. We include the left-hand cut induced by one-pion exchange in this formalism, and study the H-dibaryon at the SU(3)$_\text{F}$-symmetric point, with a pion mass around $417$MeV. The $N/D$ formalism is also compared to the Luscher quantization...
Go to contribution page -
Juan Fernandez-de la Garza (University of Bern)31/07/2026, 17:103Hadronic and nuclear spectrum and interactionsContributed talk
We present a preliminary lattice QCD study of the H-dibaryon at a close-to-physical pion mass from a spectroscopic analysis of the strangeness $S=-2$, iso-singlet baryon-baryon system on the CLS D200 ensemble. This ensemble has $m_\pi \simeq 200~\mathrm{MeV}$ and $m_K \simeq 480~\mathrm{MeV}$, using a $64^3 \times 128$ lattice with spacing $a \simeq 0.065~\mathrm{fm}$ and open temporal...
Go to contribution page -
Juan Andres Urrea Nino (Trinity College Dublin)31/07/2026, 17:301QCD at nonzero temperature and densityPoster presentation
We report on the progress of our calculation of the $1^{-+}$ exotic charmonium hybrid state at finite temperature using anisotropic FASTSUM ensembles. Using a wide basis of operators proposed by the Hadron Spectrum Collaboration together with optimal distillation profiles, we extend our existing spectrum results at different temperatures below and above $T_c$ to include zero-temperature ones....
Go to contribution page