1824 June 2017
Palacio de Congresos
Europe/Madrid timezone
Hadron Structure
Place
Location: Palacio de Congresos
Address: PALACIO DE CONGRESOS
Paseo del Violón s/n, 18006
Granada, SPAIN
Date:
from 19 Jun 14:30 to 23 Jun 19:10
Conveners

19 Jun 14:30  16:10
 Prof. Kuramashi, Yoshinobu (University of Tsukuba/RIKEN AICS)

19 Jun 16:40  18:00
 Dr. von Hippel, Georg (University of Mainz)

20 Jun 15:00  16:40
 Prof. Syritsyn, Sergey (Stony Brook University)

20 Jun 17:10  19:10
 Dr. Green, Jeremy (DESY Zeuthen)

21 Jun 09:00  11:00
 Izubuchi, Taku (Brookhaven National Laboratory & RIKENBNL Research Center)

21 Jun 11:30  13:30
 Prof. Young, Ross (University of Adelaide)

22 Jun 15:00  16:40
 Blum, Thomas (University of Connecticut)

22 Jun 17:10  19:10
 Dr. Van de Water, Ruth (Fermilab)

23 Jun 15:00  16:40
 Prof. Davies, Christine (University of Glasgow)

23 Jun 17:10  19:10
 Prof. Wittig, Hartmut (Institute for Nuclear Physics, University of Mainz)
Timetable  Contribution List
Displaying 52
contributions
out of
52
We present an update on our lattice QCD calculation of the radiative process $\pi \pi \to \pi \gamma^{*}$, which is enhanced by the presence of the $\rho$ resonance. The calculations were performed with 2+1 clover fermions at $m_\pi \approx 320$ MeV and $L$ approx $3.6$ fm, and we have now analyzed the data from the full set of gauge configurations. Using the results of our recent highprecision c
... More
Presented by Dr. Luka LESKOVEC
on
23/6/2017
at
16:30
The results of a calculation of the hadronic vacuum polarization
contribution to the muon anomalous magnetic moment are presented. We
discuss different methods for controlling the infrared regime of the
vacuum polarization function. This includes Padé fits, time moments
and the timemomentum representation. We correct our results for
finitevolume effects by combining the GounarisSakurai
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Presented by Prof. Hartmut WITTIG
on
22/6/2017
at
15:00
The auxiliary field approach, where one introduces a field whose propagator is the gauge connection along a chosen path, has been used to study renormalization of extended operators in the continuum. If we restrict the paths to straight lines along the axes, the theory can be discretized with an action similar to lattice heavyquark effective theory in the static limit. Using this theory, extended
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Presented by Dr. Jeremy GREEN
on
20/6/2017
at
15:00
Magnetic moments of the octet baryons are computed using lattice QCD in background magnetic fields, including the first treatment of the magnetically coupled $\Sigma^0$$\Lambda$ system. Although the computations are performed for relatively large values of the up and down quark masses, we gain new insight into the symmetries and relations between magnetic moments by working at a threeflavor mass
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Presented by Brian TIBURZI
on
21/6/2017
at
10:00
We have developed a new way of computing threepoint functions. This is based on a factorization with open spin (and to some extent flavour) indices that allows us to generate these simultaneously for many different initial and final states and momenta, with little computational overhead.
This factorization as well as its implementation will be explained. A new library has been written to ef
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Presented by Mr. Marius LÖFFLER
on
21/6/2017
at
12:30
Recently, an interquark potential is derived from BetheSalpeter(BS) amplitudes of charmonium ground state
by Kawanai and Sasaki. The quark potential models with an energyindependent central potential have been
successful for understanding the conventional charmonium states especially below the open charm threshold.
As one might consider, however, the interquark potential is in general energy
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Presented by Mr. Kazuki NOCHI
on
20/6/2017
at
18:50
I will present higher loop order results on a number of calculations within Chiral perturbation Theory.
1) Preliminary results on a threeloop calculation of the pion mass and decay constant in twoflavour ChPT.
For the pion mass all needed auxiliary parameters can probably be determined from lattice calculations of $\pi\pi$scattering.
2) (The main part) Twoloop results at finite volume f
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Presented by Prof. Johan BIJNENS
on
22/6/2017
at
16:00
Extending the SU(3) flavour symmetry breaking expansion from up, down and strange sea quark masses to partially quenched valence quark masses allows an extrapolation to the charm quark mass. This approach leads to a determination of charmed quark hadron masses and decay constants. Initial results are encouraging and demonstrate the potential of the procedure.
Presented by Dr. Roger HORSLEY
on
21/6/2017
at
10:40
I will discuss briefly recent changes in the methodology of computing the baryon EDM on a lattice. The associated correction substantially reduces presently existing lattice values for the proton and neutron thetainduced EDMs, so that even the most precise previous lattice results become consistent with zero. On one hand, this change removes previous disagreements between these lattice results an
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Presented by Prof. Sergey SYRITSYN
on
21/6/2017
at
9:00
We present results on the isovector and isoscalar nucleon axial form factors including disconnected contributions. The light disconnected quark loops have been computed using exact deflation, while the strange and the charm quark loops have been evaluated using the truncated solver method. Techniques such as the summation and the twostate fits have been employed to control the excited states cont
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Presented by Dr. Kyriakos HADJIYIANNAKOU
on
19/6/2017
at
15:30
We present lattice QCD calculations of the hadronic lightbylight (HLbL) contribution to the muon anomalous magnetic moment with physical masses at two different lattice spacings. The calculation includes all connected diagrams and the leading, quarklinedisconnected diagrams. Our first calculation has been performed on the $48^3\times 96$ ensemble generated with physical quark masses, $a^{1}=
... More
Presented by Thomas BLUM
on
23/6/2017
at
17:10
In local quantum field theories, conserved current operators are obtained by Neother’s theorem. However, this is not the case with effective theories with nonlocal interactions which are obtained after some of the degrees of freedom are integrated out. Consider for a instance, a system made of a proton and a neutron interacting through one pion exchange potential. The electromagnetic charge i
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Presented by Kai WATANABE
on
20/6/2017
at
16:30
We utilise a new method to calculate electric dipole moments induced by the strong QCD $\theta$term and the dimension 6 Weinberg term. The method is based on the gradient flow for gauge fields and is free from renormalisation ambiguities at nonvanishing flow times.
The results of the nucleon electric dipole moments are calculated on PACSCS gauge fields (from japan lattice data grid) using $
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Presented by Dr. Jack DRAGOS
on
21/6/2017
at
9:20
We compute the leading $QED$ corrections to the hadronic vacuum polarization (HVP) of the photon, relevant for the determination of leptonic anomalous magnetic moments.
We work in the electroquenched approximation and use dynamical $QCD$ configurations generated by the CLS initiative with two degenerate flavors of nonperturbatively O($a$) improved Wilson fermions.
We consider $QED_{\rm L}$ and
... More
Presented by Mr. Andrea BUSSONE
on
22/6/2017
at
18:10
We present an update on our determination of the electromagnetic form factors and axial charge of the nucleon from the $N_\mathrm{f} = 2 + 1$ CLS ensembles with increased statistics and an additional finer lattice spacing. We also investigate the impact of O($a$)improvement of the currents.
Presented by Dr. Georg VON HIPPEL
on
19/6/2017
at
15:10
We present our preliminary result of the electromagnetic form factor of the pion
on the large volume configurations $L = 8.1$ fm with $m_\pi = 0.145$ GeV and
$m_K = 0.525$ GeV using the stoutsmearing clover quark and
Iwasaki gauge action at $a^{1}=2.333$ GeV.
From the results at small momentum transfer we determine the mean square
charge radius at the physical $m_\pi$ and $m_K$ using the ne
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Presented by Junpei KAKAZU
on
23/6/2017
at
13:00
The wellknown discrepancy in the muon $g2$ between experiment and theory
demands further theory investigations in view of the upcoming new experiments.
One of the leading uncertainties lies in the hadronic lightbylight scattering
contribution (hlbl), that we address with our positionspace approach. In this
talk we will focus on exploratory studies of a fermion loop without gluon
ex
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Presented by Mr. Nils ASMUSSEN
on
23/6/2017
at
17:50
We present the first attempt to apply lattice OPE with a fictitious heavy quark to calculate higher moments of the pion lightcone wavefunction.
In this talk, we first discuss briefly the approach
which was introduced in heplat/0507007. Then we discuss the relevant correlators and strategy to
extract the moments. Finally, we present preliminary numerical results.
Presented by Dr. santanu MONDAL
on
23/6/2017
at
13:40
We determine the pion distribution amplitude from threepoint functions, where two currents are at the same time with a spacelike separation. Having control over the discretization effects turned out to be mandatory. This can be achieved by the choice of suitable channels and by taking into account discretization effects to leading order in the strong coupling. Furthermore, it is necessary to hav
... More
Presented by Mr. Philipp WEIN
on
20/6/2017
at
16:10
We present a new approach to extracting continuum quasi distributions from lattice QCD. Quasi distributions are defined by matrix elements of a Wilsonline operator extended in a spatial direction, evaluated between nucleon states at finite momentum. We propose smearing this extended operator with the gradient flow to render the corresponding matrix elements finite in the continuum limit. This pro
... More
Presented by Dr. Christopher MONAHAN
on
20/6/2017
at
15:20
In our previous work, the connected and leading disconnected hadronic lightbylight contributions to the muon anomalous magnetic moment (g  2) have been computed using lattice QCD ensembles corresponding to physical pion mass generated by the RBC/UKQCD collaboration. However, the calculation is expected to suffer from a significant finite volume error, which is only powerlaw suppressed. In this
... More
Presented by Taku IZUBUCHI
on
23/6/2017
at
17:30
We present a lattice calculation of the Hadronic Vacuum Polarization (HVP) contribution of the strange and charm quarks to the anomalous magnetic moment of the muon including leadingorder electromagnetic corrections. We employ the gauge configurations generated by the European Twisted Mass Collaboration (ETMC) with $N_f = 2+1+1$ dynamical quarks at three values of the lattice spacing ($a \simeq 0
... More
Presented by Dr. Simula SILVANO
on
22/6/2017
at
18:30
We present a progress report on the Fermilab Lattice, HPQCD, and MILC Collaborations’ calculation of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment (g2). This calculation is needed in order to make full use of the upcoming Fermilab and JPARC experiments to measure the muon g2 to higher precision and improve the sensitivity to physics beyond the Standard M
... More
Presented by Dr. Ruth VAN DE WATER
on
22/6/2017
at
15:40
In order to perform high precision calculations in lattice QCD for observables of physical interest, especially for dimensionful quantities, it is important to be able to determine the lattice spacing with high accuracy. One choice for scale setting is the observable $w_0$ based on the Wilson flow. It is relatively easy to measure on individual ensembles with high precision. However the value of $
... More
Presented by Mr. Lukas VARNHORST
on
21/6/2017
at
11:50
We present results for the QED and strong isospin breaking corrections to the hadronic vacuum polarization using $N_f=2+1$ Domain Wall fermions. QED is included in an electroquenched setup using two different methods, a stochastic and a perturbative approach. Results and statistical errors from both methods are directly compared with each other.
Presented by Dr. Vera GUELPERS
on
22/6/2017
at
17:30
Modern advances in experimental techniques now make it possible to test the weak interaction in nucleon/nuclear systems. In order to reliably interpret such measurements as tests of the standard model, it is often a necessity to make the assumption of good charge symmetry underlying the hadronic/nuclear interactions. Recent lattice QCD simulations have started to constrain the charge symmetry brea
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Presented by Dr. James ZANOTTI
on
19/6/2017
at
17:20
We present results for the isovector and isoscalar charges of the nucleon. The 2+1+1flavor calculations were done using MILC HISQ ensembles with three lattice spacings a=0.12, 0.09, 0.06 fm and three pion masses approximately 310, 220, 130 MeV. The 2+1flavor clover calculations were done on four ensembles with approximately 300 and 190 MeV pion masses.
Presented by Dr. Rajan GUPTA
on
19/6/2017
at
12:30
We present lattice QCD results by the BMW collaboration for the leadingorder contribution of the hadron vacuum polarization (LOHVP) to anomalous magnetic moments of all charged leptons. Calculations are performed with u, d, s and c quarks at their physical masses, in volumes of linear extent larger than 6 fm, and at six values of the lattice spacing, allowing for controlled continuum extrapolati
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Presented by Dr. Kohtaroh MIURA
on
22/6/2017
at
15:20
We report our study of finite volume effect in the leading hadronic contribution to muon g2 on gauge ensembles with Nf=2+1 dynamical clover fermions generated by PACS collaboration . We compare connected HVP with different physical volumes, from 5.4  8 fm^4, in a fixed lattice spacing a^1=2.33 GeV in physical pion, We also estimate an extrapolated value into the infinite volume limit and discu
... More
Presented by Dr. Eigo SHINTANI
on
22/6/2017
at
17:10
We present a study of the isospinbreaking corrections to pseudoscalar meson masses using the gauge configurations produced by the ETM Collaboration with $N_f=2+1+1$ dynamical quarks at three lattice spacings varying from 0.089 to 0.062 fm. Our method is based on a combined expansion of the path integral in powers of the small parameters $(m_d  m_u)/\Lambda_{QCD}$ and $\alpha_{em}$, where $m_f$ i
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Presented by DAVIDE GIUSTI
on
22/6/2017
at
18:50
Measurements and theoretical calculations of meson form factors are essential for our understanding of internal hadron structure and QCD, the dynamics that bind the quarks in hadrons. The pion form factor has been measured at small momentum transfer (Q^2) by scattering from atomic electrons and from scattering of electrons from the pion cloud around a proton. On the other hand, in the limit of ver
... More
Presented by Dr. Jonna KOPONEN
on
23/6/2017
at
13:20
We present our preliminary results on the calculation of hadronic lightbylight forward scattering amplitudes using vector fourpoint correlation functions computed on the lattice. Using a dispersive approach, these forward scattering amplitudes can be described by $\gamma^* \gamma^* \to$ hadrons fusion cross sections and then compared with phenomenology. We show that only a few states are needed
... More
Presented by Dr. Antoine GERARDIN
on
23/6/2017
at
18:10
We have calculated the magnetic moments of vector ro and K* mesons in lattice gauge theory for various masses of the light and strange quarks. The dependence of the gfactor on the pion mass was explored. The extrapolation to the phisical pion mass has been carried out.
Presented by Dr. Luschevskaya ELENA
on
21/6/2017
at
10:20
We report recent progress in nonperturbative renormalization of the hadron quasidistributions obtained through largemomentum effective theory (LaMET).
We discuss the effects of the renormalization the quasidistribution; final results converted to $\overline{MS}$ are shown.
Presented by Prof. HueyWen LIN
on
20/6/2017
at
16:00
We present results for the isovector axial, (induced) pseudoscalar, electric, and magnetic form factors of the nucleon. The calculation was done using MILC 2+1+1flavor HISQ ensembles with three lattice spacings 0.12, 0.09, 0.06 fm and three pion masses, approximately, 310, 220, 130 MeV. The same calculation is performed with the 2+1flavor clover ensembles with, approximately, 300 and 190 MeV pio
... More
Presented by Dr. YongChull JANG
on
19/6/2017
at
12:50
We report on an analysis of the average quark momentum fraction of the nucleon and related quantities using $N_f=2+1$ Wilson fermions. Computations are performed on four CLS ensembles covering three values of the lattice spacing at pion masses down to $M_\pi \approx 200\,\mathrm{MeV}$. Several sourcesink separations ($\sim 1.0\,\mathrm{fm}$ to $\sim 1.4\,\mathrm{fm}$) are used to assess exciteds
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Presented by Dr. Konstantin OTTNAD
on
21/6/2017
at
12:50
I present continuumlimit results for the scalar quark content of the nucleon computed on BMW 3HEX ensembles. The contents are determined, from the quarkmass dependence of the nucleon mass, through the FeynmanHellman theorem. I describe a method that avoids a separate computation of quarkmass renormalization constants. Individual up anddown quark contents of the proton and neutron are comput
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Presented by Dr. Christian HOELBLING
on
21/6/2017
at
11:30
The conventional approach for calculating the nucleon radius on a finitesize lattice requires interpolation of form factors in the quantized momentum transfer $Q^2$. This interpolation is modeldependent and is therefore a source of systematic uncertainty. Recently, we have presented a derivative method for computing the isovector Dirac radius and the anomalous magnetic moment of the nucleon dire
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Presented by Nesreen HASAN
on
19/6/2017
at
17:00
We present an update on our results of nucleon form factors measured on
a largevolume lattice $(8.1 \mathrm{fm})^4$ at almost the physical point in 2+1 flavor QCD.
The configurations are generated with the stoutsmeared $\mathcal{O}(a)$ improved Wilson quark
action and Iwasaki gauge action at $\beta=1.82$, which corresponds to the lattice spacing
of 0.085 fm. The pion mass at the simulatio
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Presented by Mr. Natsuki TSUKAMOTO
on
19/6/2017
at
15:50
Current status of nucleonstructure calculations using the RBC and RBC+UKQCD 2+1flavor domainwallfermion (DWF) dynamical latticeQCD ensembles is reported.
Presented by Dr. Shigemi OHTA
on
19/6/2017
at
16:40
It is important to correct for finitevolume (FV) effects in the presence of QED, since these effects are typically large due to the long range of the electromagnetic interaction. We recently made the first lattice calculation of electromagnetic corrections to the hadronic vacuum polarisation (HVP). For the HVP, an analytical derivation of FV corrections involves a twoloop calculation which has n
... More
Presented by Mr. James HARRISON
on
22/6/2017
at
17:50
Recently, methods that allow for the computation of parton distribution functions in lattice QCD have been proposed. In particular, it has been argued that timelocal, and spatially nonlocal Euclidean matrix elements can be used as probes of hadronic structure and, in certain limits, lightcone parton distribution functions can be obtained. However, approaching these limits presents both numerica
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Presented by Prof. Kostas ORGINOS
on
20/6/2017
at
15:40
The partonic and electromagnetic structure of the proton has been studied extensively over the past few decades. There is now extensive knowledge of the longitudinal momentum distributions of quarks and gluons in the proton. Nevertheless, there are gaps in the experimental coverage and it is hence highly desired to have robust results from numerical simulations in lattice QCD — in addition to es
... More
Presented by Prof. Ross YOUNG
on
20/6/2017
at
15:50
We present results for the renormalization of gauge invariant
nonlocal fermion operators
which contain a Wilson line, to one loop level in lattice perturbation theory. Our calculations have
been performed for Wilson/clover fermions and a wide class of Symanzik improved gluon actions.
The extended nature of such `longlink' operators results in a nontrivial renormalization,
in
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Presented by Prof. Haralambos (Haris) PANAGOPOULOS
on
20/6/2017
at
15:10
Matching of the quasi parton distribution functions between continuum and lattice is addressed using lattice perturbation theory. Specifically, we use Wilsontype fermions in the analysis. The matching is done for nonlocal quark bilinear operators with Wilson line. We also discuss operator mixing in the renormalization for the nonlocal operators based on a symmetry argument.
Presented by Dr. Tomomi ISHIKAWA
on
20/6/2017
at
16:20
One of these systematic errors in the lattice computation of the HVP contribution to muon $g2$ is that associated with the extrapolation to the physical pion mass.
We investigate this extrapolation assuming lattice pion masses in the range of 200 to 400 MeV with the help of twoloop chiral perturbation theory, and find that such
an extrapolation is unlikely to lead to control of this systematic
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Presented by Prof. Maarten GOLTERMAN
on
22/6/2017
at
16:20
We present the current status of extracting parton distribution functions (PDFs) from the quasiPDF approach by the European Twisted Mass Collaboration. We show our results for two ensembles of gauge field configurations, at a nonphysical pion mass of around 370 MeV and preliminary results at the physical pion mass. We also discuss our recent progress in renormalization of the matrix elements for
... More
Presented by Dr. Krzysztof CICHY
on
20/6/2017
at
15:30
A method to probe second order electroweak interactions in light nuclei is proposed and explored with a focus on doubleβ decay. The potential importance of shortdistance nuclear effects in doubleβ decay is assessed using a lattice QCD calculation of the nn→pp transition and effective field theory methods. These effects, encoded in the isotensor axial polarisability, are found at the unphysi
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Presented by William DETMOLD
on
23/6/2017
at
14:00
This presentation will examine the structure of the ground state nucleon and its finitevolume excitations from three different perspectives.
Using new techniques to extract the relativistic components of the nucleon wave function, we'll explore the node structure of both upper and lower components of the nucleon wave function and reveal the manner in which a non trivial role for gluonic compon
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Presented by Prof. Derek LEINWEBER
on
19/6/2017
at
17:40
In this talk, we present recent progress in our study of the electromagnetic pion form factor using gauge configurations at the physical pion mass generated by the European Twisted Mass Collaboration.
By working in the Breit frame, we obtain O(a)improved estimates of the form factor as well as the pion charge radius.
Employing twisted boundary conditions, we are able to study a wide range of mo
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Presented by Dr. Bartosz KOSTRZEWA
We report on progress on computing the quark contributions to the nucleon spin as well as the quark contributions to the nucleon mass, the sigmaterms. The present work is carried out on $N_f=2+1$ CLS ensembles of nonperturbatively improved Wilson fermions, down to a pion mass of about 220 MeV.
Presented by Prof. Gunnar BALI
on
21/6/2017
at
12:10
It is a common problem in In lattice QCD calculations of hadron masses with annihilation channel that the signal falls off in time separation while the noise remains constant. In addition, the disconnected insertion calculation in the threepoint function and the calculation of the neutron electric dipole moment (nEDM) with the $\theta$ terms suffer from a noise due to the $\sqrt{V}$ fluctuation.
... More
Presented by Prof. KehFei LIU
on
21/6/2017
at
9:40