Prof.
Ulf-G. Meissner
(Universitaet Bonn and Forschungszentrum Juelich)
15/11/2021, 19:10
Dr
Hailong Ma
(IHEP)
15/11/2021, 19:50
Juan Jose Sanz-Cillero
(Madrid Univ.)
15/11/2021, 20:30
志广 肖
(Sichuan University)
15/11/2021, 21:30
Prof.
Haiyan Gao
(Duke Univ.)
15/11/2021, 22:10
Dick Furnstahl
(Ohio State University)
15/11/2021, 22:50
Lisheng GENG
(Being Univ)
16/11/2021, 18:30
Dr
Meng-Lin Du
(IFIC, Valencia U.)
16/11/2021, 18:30
Elena P. D. Rio
(INFN)
16/11/2021, 18:30
jiajun wu
(UCAS)
16/11/2021, 18:50
Xiaolin Kang
(CUG)
16/11/2021, 18:50
Dr
Bingwei Long
(Sichuan University)
16/11/2021, 18:50
Ashot Gasparyan
(Ruhr University of Bochum)
16/11/2021, 19:10
Xiangkun Dong
(ITP)
16/11/2021, 19:10
Antonella Antonelli
(INFN)
16/11/2021, 19:10
Andreas Nogga
(Forschungszentrum Juelich GmbH)
16/11/2021, 19:30
Zhihui Guo
(Southeast University)
16/11/2021, 19:30
Karol Kampf
(Charles University)
16/11/2021, 19:30
Tobias ISKEN
(GSI)
16/11/2021, 19:50
Yuki Kamiya
(Helmholtz-Institut für Strahlen- und Kernphysik)
16/11/2021, 19:50
Simone Li Muli
(Johannes Gutenberg University Mainz)
16/11/2021, 19:50
Emilio Royo
(Universitat Autonoma de Barcelona (UAB) and Institut de Fisica d\'Altes Energies (IFAE))
16/11/2021, 20:10
hao chen
(Peking Univ.)
16/11/2021, 20:10
Daniel Phillips
(Ohio University)
16/11/2021, 20:30
Jambul Gegelia
(Ruhr-University-Bochum)
16/11/2021, 20:30
Hakan Akdag
(Bonn University)
16/11/2021, 20:30
Alexandre Deur
(Thomas Jefferson National Accelerator Facility)
16/11/2021, 21:10
Emilie Passemar
(Indiana University/JLab)
16/11/2021, 21:10
Julian Kahlbow
(MIT)
16/11/2021, 21:10
Vladimir Pascalutsa
(Mainz Univ.)
16/11/2021, 21:30
Len Brandes
(Technical University of Munich)
16/11/2021, 21:30
Rafel Escribano
(Universitat Autonoma de Barcelona)
16/11/2021, 21:30
Harald Griesshammer
(George Washington Universit)
16/11/2021, 21:50
Dr
Johann Haidenbauer
(Forschungszentrum Juelich GmbH)
16/11/2021, 21:50
Sergi GONZÀLEZ-SOLÍS
(Indiana University)
16/11/2021, 21:50
Hoai LE
(Forschungszentrum Juelich)
16/11/2021, 22:10
Alexander Somov
(Jefferson Lab)
16/11/2021, 22:10
Rajan Gupta
(Los Alamos National Laboratory)
16/11/2021, 22:10
Mohammad Ahmed
(North Carolina Central University)
16/11/2021, 22:30
Reynier CRUZ-TORRES
(LBNL, Berkeley)
16/11/2021, 22:30
Igal Jaegle
(Jefferson Lab)
16/11/2021, 22:30
Marc Illa
(University of Washington)
16/11/2021, 22:50
Ilya Larin
(UMASS Amherst)
16/11/2021, 22:50
Yiyu Zhou
(South China Normal University)
16/11/2021, 22:50
David Ruth
(University of New Hampshire)
16/11/2021, 23:10
Dinko Počanić
(University of Virginia)
16/11/2021, 23:10
Rory Miskimen
(University of Massachusetts)
16/11/2021, 23:30
Bai-Long Hoid
(Universität Bern)
16/11/2021, 23:50
Tianbo Liu
(Shandong University)
17/11/2021, 18:30
Kimiko Sekiguchi
(Tohoku University)
17/11/2021, 18:30
Johan Bijnens
(Lund University)
17/11/2021, 18:30
Martin Hoferichter
(University of Bern)
17/11/2021, 18:50
Zhihong Ye
(Tsinghua University)
17/11/2021, 18:50
Takumi DOI
(RIKEN))
17/11/2021, 18:50
Hector Gisbert
(TU Dortmund)
17/11/2021, 19:10
John Bulava
(DESY)
17/11/2021, 19:10
Nils HERMANSSON-TRUEDSSON
(University of Bern)
17/11/2021, 19:10
Yan Lyu
(school of physics Peking Uniersity)
17/11/2021, 19:30
Tomas Kadavy
(Charles University)
17/11/2021, 19:30
Quzhi Li
(Peking Univ.)
17/11/2021, 19:30
Herzallah Alharazin
(Institut für Theoretische Physik II)
17/11/2021, 19:50
Yigal Shamir
(Tel Aviv university)
17/11/2021, 19:50
Christopher CULVER
(University of Liverpool)
17/11/2021, 19:50
Dr
Maxim Mai
(GWU)
17/11/2021, 20:10
Yonghui Lin
(Bonn University)
17/11/2021, 20:10
Mattias Sjö
(Lund University)
17/11/2021, 20:10
Steffen Strauch
(University of South Carolina)
17/11/2021, 20:30
Tomáš Husek
(IFIC (UV-CSIC))
17/11/2021, 20:30
Lu Meng
(Ruhr University Bochum)
17/11/2021, 20:30
Dr
Xiaochao Zheng
(University of Virginia)
17/11/2021, 21:10
Vadim Lensky
(JGU, Mainz)
17/11/2021, 21:10
Christopher Kelly
(Colmbia University)
17/11/2021, 21:10
Leendert Hayen
(NCSU)
17/11/2021, 21:30
Chao Peng
(Argonne National Laboratory)
17/11/2021, 21:30
Dr
Corrado GATTO
(INFN & NIU)
17/11/2021, 21:30
Ishara Fernando
(University of Virginia)
17/11/2021, 21:50
Lingfeng Li
(Brown University)
17/11/2021, 21:50
Sachin SHAIN PORUVELIL
(Massachusetts U)
17/11/2021, 21:50
Xiong-Hui Cao
(Peking University)
17/11/2021, 22:10
Thomas Richardson
(Duke Univ)
17/11/2021, 22:10
Nils Dirk Conrad
(Ruhr-Universität Bochum)
17/11/2021, 22:10
Nolan Miller
(University of North Carolina, Chapel Hill)
17/11/2021, 22:30
Evan Rule
(UC, Berkeley)
17/11/2021, 22:30
Olekandra Deineka
(Johannes Gutenberg University Mainz)
17/11/2021, 22:30
Wouter Dekens
(UC San Diego)
17/11/2021, 22:50
Malwin Niehus
(HISKP)
17/11/2021, 22:50
Nikos Sparveris
(Temple University)
17/11/2021, 22:50
Dominik Stamen
(Bonn University)
17/11/2021, 23:10
Andre Walker-loud
(LBNL)
17/11/2021, 23:10
Dr
ARKAITZ RODAS
(College of William and Mary)
17/11/2021, 23:30
antonelli antonella
(INFN)
17/11/2021, 23:50
Xiulei Ren
(Johannes Gutenberg-Universität Mainz)
18/11/2021, 19:00
Bastian Kubis
(Bonn University)
18/11/2021, 19:40
Hermann Krebs
(Bochum Univ.)
18/11/2021, 20:20
Karl Slifer
(Univ. of New Hampshire)
18/11/2021, 21:20
Dean Lee
(Michigan State Univ.)
18/11/2021, 22:00
Zein-Eddine Meziani
(Argonne National Laboratory)
18/11/2021, 22:40
Saori Pastore
(Washington Univ.)
18/11/2021, 23:20
Randolf Pohl
(Johannes Gutenberg-Universität)
19/11/2021, 19:00
Arseniy Filin
(Bochum University)
19/11/2021, 19:40
Luca Girlanda
(INFN)
19/11/2021, 20:20
Christian Drischler
(Michigan State University)
19/11/2021, 21:20
Ashot Gasparian
(North Carlolina A& T State Univ.)
19/11/2021, 22:00
Luchang Jin,
Luchang Jin
(University of Connecticut)
19/11/2021, 22:40
Evgeny Epelbaum
(Ruhr-Universitaet Bochum)
19/11/2021, 23:20
Dr
Hoai Le
(Forschungszentrum Juelich)
Parallel-Few-Body Physics
Experimental information on hypernuclei with double strangeness, in particular $\Xi$ systems, is very limited because of low intensity of kaon beams and the extremely short life times of hyperons. In this contribution, I report on an investigation of the possible existence of bound $\Xi$ states in systems with $A=4-7$ baryons using the Jacobi NCSM [1] approach in combination with ...
Xiong-Hui Cao
(Peking University)
Parallel-Goldstone Boson
A dispersive representation based on unitarity and analyticity is used to study the low energy $\gamma N \rightarrow \pi N$ and $\gamma^{*} N \rightarrow \pi N$ partial wave amplitudes.
Final state interactions of the $\pi N$ system are critical to this analysis.
The left-hand cut contribution is estimated by invoking $\mathcal{O}(p^{2})$ baryon chiral perturbation theory results,
while the...
Dr
Maxim Mai
(GWU)
Parallel-Few-Body Physics
We report the first determination of universal parameters of the axial a1(1260) resonance from lattice QCD [arXiv:2107.03973 [hep-lat] in press at PRL]. Three-body quantization condition (FVU) is generalized and utilized to extract infinite-volume information from lattice eigenenergies. Subsequently, pole position and residua of the three-body resonance are extracted on the second Riemann...
Ishara Fernando
(University of Virginia)
Parallel-Few-Body Physics
Baryon Chiral Perturbation Theory (BChPT) and the 1/Nc expansion provide systematic frameworks for the strong interactions at low energy. A combined framework of both expansions has been developed and applied for baryons with three light-quark-flavors. The small scale expansion of the combined approach is identified as the ξ-expansion, in which the power counting of the expansions is linked...
Mr
Herzallah Alharazin
(Theoretical Hadron Physics)
Parallel-Hadron Structure
Effective chiral Lagrangian of nucleons and pions in external gravitational field and the corresponding energy-momentum tensor will be considered. Gravitational form factors of the nucleon and their relation to internal forces will be discussed.
Dr
Andreas Nogga
(Forschungszentrum Juelich GmbH)
Parallel-Few-Body Physics
Charge symmetry breaking (CSB) of the $\Lambda$-nucleon interaction has been well established by the experimentally known difference of the $\Lambda$ separation energies of the mirror hypernuclei $^4_\Lambda$He and $^4_\Lambda$H[1]. At the same time, accurate predictions for these quantities are possible based on solutions of Faddeev-Yakubovsky equations[2].
In this contribution, we employ...
Ms
Oleksandra Deineka
(Johannes Gutenberg University of Mainz)
Parallel-Goldstone Boson
We present a data-driven analysis of the resonant S-wave $\pi\pi \to \pi\pi$ and $\pi K \to \pi K$ reactions using the partial-wave dispersion relation. The contributions from the left-hand cuts are accounted for using the Taylor expansion in a suitably constructed conformal variable. The fits are performed to experimental and lattice data as well as Roy analyses. For the $\pi\pi$ scattering...
佳俊 吴
(University of Chinese Academy of Sciences)
Parallel-Hadron Structure
In this talk, the triangle singularity mechanism is investigated in the two reactions of ψ decay, ψ(2S) → $p \bar{p} \eta$ and ψ(2S) →π +π−K+K−. They would generate a very narrow peak in the invariant mass spectrum of final states. In these processes, all the involved vertices are constrained by the experimental data. Thus, we can make a precise prediction here. We expect these effects can be...
Mr
Nolan Miller
(University of North Carolina, Chapel Hill)
Parallel-Hadron Structure
We report a preliminary, percent-level determination of the nucleon mass $M_N$ and a roughly 5%-level determination of the sigma term $\sigma_{\pi N}$ from lattice QCD. We find that our $M_N$ extrapolation to the physical point agrees with the PDG average. Next we review the significance of $\sigma_{\pi N}$ for direct dark matter searches, and we explore the sensitivity of this observable over...
Vadim Lensky
(JGU, Mainz)
Parallel-Few-Body Physics
We calculate the forward unpolarised doubly-virtual Compton scattering (VVCS) off the deuteron in the framework of pionless effective field theory, up to next-to-next-to-next-to-leading order (N3LO) for the longitudinal and next-to-leading order (NLO) for the transverse amplitude. The charge elastic form factor of the deuteron, obtained from the residue of the longitudinal VVCS amplitude, is...
Dr
Yigal Shamir
(Tel Aviv University)
Parallel-Goldstone Boson
We review dilaton chiral perturbation theory (dChPT), the effective low-energy theory for the light sector of near-conformal, confining theories. dChPT provides a systematic expansion in both the fermion mass and the distance to the conformal window. It accounts for the pions and the light scalar, the approximate Nambu-Goldstone bosons for chiral and scale symmetry, respectively. A unique...
Dominik Stamen
(B)
Parallel-Goldstone Boson
We provide a dispersion-theoretical representation
of the reaction amplitudes $\gamma K\to K\pi$ in
all charge channels, based on modern pion–kaon $P$-wave
phase shift input. Crossed-channel singularities
are fixed from phenomenology as far as possible.
We demonstrate how the subtraction constants can be
matched to a low-energy theorem and radiative couplings
of the $K^∗(892)$...
Dr
ARKAITZ RODAS
(College of William and Mary)
Parallel-Goldstone Boson
The determination of low energy $\pi K$ scattering has been subject to debate during many years. The precise and robust extraction of these processes is relevant for both experimentalist and phenomenologists. In particular, the low energy expansion of the partial waves offers rich information for chiral perturbation theory practitioners and can be compared to modern lattice QCD calculations....
Dr
Ashot Gasparyan
(Ruhr University of Bochum)
Parallel-Few-Body Physics
Nucleon-nucleon interaction
is studied within chiral effective field theory with a finite cutoff
at next-to-leading order in the chiral expansion.
The leading order interaction is resummed non-perturbatively,
whereas the next-to-leading-order terms are taken into account in a perturbative manner.
Explicit renormalizability of such a scheme is proven in certain important cases.
In...
Prof.
Daniel Phillips
(Ohio University)
Parallel-Few-Body Physics
We explore the constraints on the three-nucleon force (3NF) of chiral effective field theory (χEFT) that are provided by bound-state observables in the A = 3 and A = 4 sectors. Our statistically rigorous analysis incorporates experimental error, computational method uncertainty, and the un- certainty due to truncation of the χEFT expansion at next-to-next-to-leading order. A consistent...
Dr
Lisheng Geng
(Beihang University)
Parallel-Few-Body Physics
We construct the next-to-leading and next-to-next-to-leading chiral nucleon-nucleon interaction in covariant baryon chiral perturbation theory. We show that a rather good description of the $np$ phase shifts up to $E_\mathrm{lab}=200$ MeV can be achieved with a $\chi^2/\mathrm{d.o.f.}$ less than 1. The resulting potential can be employed in ab initio studies of nuclear structure and...
Len Brandes
(Technical University of Munich)
Parallel-Few-Body Physics
The phase structure of baryonic matter is investigated with focus on the role of fluctuations beyond the mean-field approximation. The prototype test case studied is the chiral nucleon-meson model, with added comments on the chiral quark-meson model. Applications to nuclear matter include the liquid-gas phase transition. Extensions to high baryon densities are performed for both nuclear and...
Len Brandes
(Technical University of Munich)
Parallel-Few-Body Physics
The phase structure of baryonic matter is investigated with focus on the role of fluctuations beyond the mean-field approximation. The prototype test case studied is the chiral nucleon-meson model, with added comments on the chiral quark-meson model. Applications to nuclear matter include the liquid-gas phase transition. Extensions to high baryon densities are performed for both nuclear and...
Giuseppe Mandaglio
(University of Messina)
Parallel-Hadron Structure
KLOE and KLOE-2 data (almost 8 fb$^{-1}$) constitute the largest sample ever collected at an electron-positron collider operating at the $\phi$ peak resonance.
In total it corresponds to the production of about 24 billion of $\phi$ mesons whose decays include about 8 billion pairs of neutral K mesons and about 300 million $\eta$ mesons.
A wide hadron physics program, investigating rare...
Martin Hoferichter
(University of Bern)
Parallel-Goldstone Boson
Hadronic vacuum polarization currently yields the dominant uncertainty in the Standard-Model prediction for the anomalous magnetic moment of the muon. While the phenomenological approach is only as accurate as the hadronic cross sections used as input, there are several aspects related to chiral dynamics that can be used as cross checks, including pi pi dynamics and the chiral anomaly. In the...
Bai-Long Hoid
(Universität Bern)
Leendert Hayen
(NCSU)
Parallel-Hadron Structure
Precision searches in neutron beta decay have been at the inception and continued testing of the Standard Model, fueled in part by progress in electroweak radiative corrections. Recently, a substantial shift in the evaluation of the so-called $\gamma W$ box have caused a significant shift in $V_{ud}$, the up-down CKM matrix element, inspiring substantial additional research including radiative...
Thomas R. Richardson
(Duke University)
Parallel-Few-Body Physics
Low energy experiments that search for Beyond the Standard Model (BSM) physics often rely on nuclear targets.
Therefore, it is imperative that we obtain a clear theoretical picture of the nuclear physics involved.
Effective field theory (EFT) provides a model-independent framework to capture the nuclear physics in terms of few-nucleon currents.
However, every operator in an EFT...
Yuki Kamiya
(Helmholtz-Institut für Strahlen- und Kernphysik)
Parallel-Hadron Structure
The two-particle momentum correlation function from high-energy nuclear collisions is beginning to be used to study hadron-hadron interaction. In this talk, the $K^-p$ correlation function is discussed with employing the realistic KbarN-piSigma-piLambda coupled-channel potential based on the chiral SU(3) dynamics. With the reasonable source function parameters, the theoretical calculations...
Dr
Ilya Larin
(UMASS Amherst)
Parallel-Goldstone Boson
The neutral pion transition form factor (TFF) plays an important role in tests of low energy QCD, and in the determination of the hadronic-light-by-light (HLbL) scattering contribution to the muon anomalous magnetic moment, (g-2). Several measurements of this form factor exist in the large space-like Q2region, but the low Q2space-like region remains largely unexplored. This talk will present...
Rory Miskimen
(U)
Parallel-Goldstone Boson
Electromagnetic polarizabilities are fundamental properties of composite systems such as molecules, atoms, nuclei and hadrons. Measurements of hadron polarizabilities can test effective field theories, dispersion theories, and lattice calculations, with the charged pion polarizability providing a test of fundamental symmetries at leading order. Significant progress has been made in...
Yan Lyu
(school of physics Peking Uniersity)
We present a first study on a pair of triply charmed baryons, $\Omega_{ccc}\Omega_{ccc}$ in the $^1S_0$ channel (the most charming dibaryon), on the basis of the HAL QCD method.
The calculations are perfomed on the $(2+1)$-flavor lattice QCD configurations with nearly physical light-quark masses and physical charm-quark mass.
We show that the system with the Coulomb repulsion taking into...
Dr
Yonghui Lin
(HISKP, Bonn University)
Parallel-Hadron Structure
We present a combined analysis of the electromagnetic form factors of the
nucleon in the space- and timelike regions using dispersion theory.
Our framework provides a consistent description of the experimental data
over the full range of momentum transfer, in line with the
strictures from analyticity and unitarity. The statistical
uncertainties of the extracted form factors are...
Dr
Xiu-Lei Ren
(Johannes Gutenberg-Universität Mainz)
Plenary
We develop a systematic approach for chiral nuclear forces by applying time-ordered perturbation theory to manifestly Lorentz-ivariant formulation of chiral effective field theory. The effective potential and the scattering equation (Kadyshevsky equation) are obtained within the same framework. Restricting the non-perturbative treatment to the (non-singular) leading order potential and...
Simone Li Muli
(Johannes Gutenberg University)
,
Sonia Bacca
(Johannes Gutenberg University)
Parallel-Few-Body Physics
Precision spectroscopic measurement in muonic atoms require precision theoretical calculations. While quantum electrodynamics effects are very well known, nuclear structure corrections are presently the largest source of uncertainty and consequently the bottle-neck for fully exploiting the experimental precision in extracting nuclear radii.
Utilizing techniques and methods developed in...
Harald W. Griesshammer
(George Washington University)
Parallel-Hadron Structure
An Update Low-energy Compton scattering probes the nucleon's two-photon response to electric and magnetic fields. It tests the symmetries and strengths of the interactions between constituents, and with photons. For convenience, this energy-dependent information is often compressed into the two scalar dipole polarizabilities $\alpha_{E1}$ and $\beta_{M1}$ at zero photon energy. In addition,...
Jambul Gegelia
(R)
Parallel-Hadron Structure
In the framework of a two-loop order calculation for an effective field theory of
scalar, vector and fermion fields interacting with the metric field we show
that for the cosmological constant term which is fixed by the condition of vanishing
vacuum energy, the graviton remains massless and
there exists a self-consistent effective field theory of general relativity defined on a
flat...
Mr
Tomas Kadavy
(Charles University)
Parallel-Goldstone Boson
In this talk, we deliver an overview of our most recent results on the operator product expansion of the three-point correlators of chiral currents. Moreover, we present some phenomenological applications of these results within the context of the odd-intrinsic parity sector, such as the decays $\rho\to\gamma\pi$, $\omega\to\gamma\pi$ and the $g-2$
Zhihong Ye
(Tsinghua University)
Parallel-Hadron Structure
Generalized Parton distributions (GPDs) are a new theoretical tool that was developed in the late 90s. GPDs not only link the well-known form factors and parton distribution functions but also provide much richer correlation information between the transverse location and the longitudinal momentum of partons. More importantly, they can access the contribution of the orbital angular momentum of...
Tianbo Liu
(Shandong University)
Parallel-Hadron Structure
Transverse momentum dependent (TMD) parton distributions provide three-dimensional imaging of hadrons in the momentum space and the correlation with spins. The precise measurement of TMDs is one of the main goals of many JLab12 experiments and future EIC and EicC programs. It has become an important and very active area of hadron physics from both experimental and theoretical aspects. In this...
Hakan Akdag
(Bonn University)
Parallel-Goldstone Boson
We construct hadronic amplitudes for the three-body decays
$\eta^{(\prime)}\to\pi^+\pi^-\pi^0$ and $\eta'\to\eta\pi^+\pi^-$ in a non-perturbative fashion,
allowing for $C$- and $CP$-violating asymmetries in the $\pi^+\pi^-$ distributions.
These amplitudes are consistent with the constraints of analyticity and unitarity. We find that the currently most accurate Dalitz-plot...
Rafel Escribano
(Universitat Autonoma de Barcelona)
Parallel-Goldstone Boson
An enhanced phenomenological model that includes isospin-symmetry breaking is presented in this letter.
The model is then used in a number of statistical fits to the most recent experimental data for the radiative transitions
$V\!P\gamma$ ($V=\rho$, $K^*$, $\omega$, $\phi$ and $P=\pi$, $K$, $\eta$, $\eta^{\prime}$)
and estimations for the mixing angles amongst the three pseudoscalar states...
Dinko Počanić
(University of Virginia)
Parallel-Goldstone Boson
Involving only light elementary particles, charged pion decays are characterized by simple dynamics, few available decay channels, and extremely well controlled radiative and loop cor rections. The comparative simplicity of pion (and muon) decays allows them to be described with unprecedented precision within the Standard Model, (SM), typically with relative un certainties of ∼ 10−4 or lower,...
Arseniy Filin
(Ruhr University Bochum)
Plenary
We present a high-precision calculation of the deuteron, triton, $^3$He and $^4$He charge
form factors based on the latest two- and three-nucleon forces,
and charge density operators derived up through the fifth order in the chiral effective field theory.
We predict the values of the structure radius and the quadrupole
moment of the deuteron, the $^4$He charge radius, and the isoscalar...
Mr
sachin shain poruvelil
(University of Massachusetts, Amherst)
Parallel-Few-Body Physics
Electric dipole moments of nuclei, diamagnetic atoms, and certain molecules are induced by CP-violating nuclear forces. Naive dimensional analysis predicts these forces to be dominated by long-range one-pionexchange processes with short-range forces entering only at next-to-next-to-leading order in the chiral expansion. Based on renormalization arguments we argue that a consistent picture of...
Prof.
Zhi-Hui Guo
(Southeast University)
Parallel-Hadron Structure
I will first review our study of the resonance dynamics in the U(3) chiral theory. Then I will focus on the determination of the light-quark mass by taking the spectral functions from the U(3) chiral theory within the framework of QCD sum rule. It turns out that once the scalar dynamics in the spectral function is properly included, the resulting values of the light-quark mass in the isoscalar...
Alexandre Deur
(J)
Parallel-Hadron Structure
We will report on recently published experimental results on spin sum
rules, and particularly on the generalized spin polarizabilities
$\gamma_0(Q^2)$ (for both the proton and neutron) and $\delta_{LT}(Q^2)$
(for the neutron).
The data were taken at Jefferson Lab in Hall A (neutron) and B (proton
and deuteron) by experiments E97-110 and EG4, respectively. They covered
the very low $Q^2$...
Emilie Passemar
(Indiana University/JLab)
Parallel-Goldstone Boson
In this talk, we will show how $\eta \to 3 \pi$ is the golden channel for determining the light quark mass ratio from experiment. We will review the different extractions and uncertainty assessment. The results will be compared with lattice QCD determinations and the opportunities for further improvement will be discussed.
Kimiko Sekiguchi
(Tohoku University)
Parallel-Few-Body Physics
Understanding the nuclear properties from bare nuclear forces is one of the main topics in nuclear physics. The importance of three-nucleon forces (3NFs), which appear when more than two nucleons interact, has been indicated in various nuclear phenomena, such as few-nucleon scattering, nuclei binding energies, and state equation of nuclear matter.
Nucleon-deuteron ($Nd$) scattering, where...
Dr
Johann Haidenbauer
(Forschungszentrum Juelich GmbH)
The Jülich-Bonn-Munich Collaboration has applied chiral effective field theory
to investigate the baryon-baryon interaction involving hyperons.
These studies, performed so far up to next-to-leading order (NLO) in the chiral
expansion, have shown that for the strangeness $S=-1$ ($\Lambda N$, $\Sigma N$)
and $S=-2$ ($\Lambda \Lambda$, $\Xi N$) sectors a consistent and satisfactory...
Dr
Nils Hermansson-Truedsson
(University of Bern)
Parallel-Hadron Structure
In this talk we present a relativistic and model-independent method to analytically derive electromagnetic finite-size effects beyond the point-like approximation. Structure-dependence appears in terms of physical form-factors and derivatives thereof. The values of these physical quantities can be taken either from experimental measurements or auxiliary lattice calculations. We first apply our...
Elena Filandri
(University of Trento)
Steffen Strauch
(University of South Carolina)
Plenary
In 2010, high-precision studies of muonic hydrogen found notably smaller values for the charge radius than earlier results that have been extracted from elastic electron-scattering data and through the spectroscopy of atomic hydrogen. The MUon Scattering Experiment (MUSE) at the Paul Scherrer Institute (PSI) has been developed to address this so-called proton-radius puzzle. The experiment will...
Mr
Qu-Zhi Li
(Peking University)
Parallel-Goldstone Boson
The N/D method is used to study the $S_{11}$ channel low energy $\pi N$ scattering amplitude. The inputs of left cuts are obtained from various phenomenological models at tree level. With the aid of the production representation, the total phase shifts can be decomposed into different contributions, and it further reveals that the existence of subthreshold resonance $N^*(890)$ doesn't depend...
Mr
Hao Chen
(Peking University)
Parallel-Hadron Structure
The pole counting rule, is a powerful and model-independent method to distinguish a confining state from a hadronic molecule. It has been applied to the explorations of $X(6900)$, $X_1(2900)$ as well as $Z_c(3900)$, $X(3872)$, $X(4660)$, etc. For $X(6900)$, both a confining state and a molecular state are possible, because lacking of enough data. For $X_1(2900)$, the analysis shows that it...
Dr
Sergi Gonzàlez-Solís
(Indiana University)
Parallel-Goldstone Boson
The scalar and vector meson exchange contributions to the doubly radiative decays
$\eta^{(\prime)}\to\pi^0\gamma\gamma$ and $\eta^\prime\to\eta\gamma\gamma$
are analysed within the Linear Sigma Model and Vector Meson Dominance frameworks, respectively.
Predictions for the diphoton invariant mass spectra and the associated integrated
branching ratios are given and compared with current...
Christopher Culver
(University of Liverpool)
Parallel-Few-Body Physics
Hadron scattering information can be indirectly accessed through lattice QCD calculations of the finite-volume spectrum of multi-hadron states. The quantization condition connects the finite-volume energies to a description of scattering in the infinite-volume and has been very successful in the two-hadron sector. We will present an extension of the quantization condition to three-particle...
Tomáš Husek
(Lund University (SE))
Parallel-Goldstone Boson
Within the framework of the massive O($N$) nonlinear sigma model extended to the next-to-leading order in the chiral counting (for $N=3$ corresponding to the two(-quark)-flavor Chiral Perturbation Theory), we calculate the relativistic six-pion scattering amplitude at low energy up to and including terms $\mathcal{O}(p^4)$. Results for the pion mass, decay constant and the four-pion amplitude...
Julian Kahlbow
(MIT)
Parallel-Few-Body Physics
Understanding the structure of a strongly-interacting quantum mechanical system such as atomic nuclei is a formidable challenge in physics. Nucleon knockout reactions with high energy probes are widely used to reveal the inner structure of nuclei, however they cannot be applied to study unstable nuclei. We recently demonstrated the feasibility to access Short-Range Correlation (SRC) properties...
Andre Walker-loud
(LBNL)
Parallel-Few-Body Physics
Lattice QCD calculations of two-nucleon systems have suffered from a significant systematic uncertainty for more than a decade. Two different methods of computing the interaction energy have yielded qualitatively different solutions: the use of local creation operators yields deeply bound di-nucleon systems, while calculations that use momentum space creation operators or the HAL QCD...
Lu Meng
(Ruhr University Bochum)
Prof.
Nikos Sparveris
(Temple University)
Parallel-Hadron Structure
The Generalized Polarizabilities (GPs) are fundamental properties of the nucleon. They characterize the nucleon's response to an applied electromagnetic field, giving access to the polarization densities inside the nucleon. As such the GPs represent a central path towards a complete understanding of the nucleon dynamics. Previous measurements of the proton electric GP at intermediate...
