### Description

Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

Dr.
Nuria Carrasco Vela
(INFN-Rome3)

04/07/2014, 15:00

Lattice QCD

Oral presentation

Accurate measurements of K, D and B meson mixing amplitudes provide stringent constraints in the Unitary Triangle analysis, as well as useful bounds on New Physics scales. Lattice QCD provides a non perturbative tool to compute the hadronic matrix elements entering in the effective weak Hamiltonian, with errors at a few percent level and systematic uncertainties under control. In this talk, I...

Dr.
Petros Dimopoulos
(Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi" - Dipartimento di Fisica, Univ. di Roma "Tor Vergata")

04/07/2014, 15:30

Lattice QCD

Oral presentation

We present precision lattice calculations for the decay constants of the D and B sector as well as determinations of the charm and b quark mass values. Heavy flavour lattice computations are indispensable
for SM accuracy tests and may serve as discovery tools for new physics. We use Nf=2+1+1 dynamical quark gauge configurations generated by European Twisted Mass Collaboration. We use data at...

Blazenka Melic
(Rudjer Boškovic Institute, Theoretical Physics Division P.O.Box 180, HR-10002 Zagreb, Croatia)

04/07/2014, 15:50

Lattice QCD

Oral presentation

We compute the decay constants of the lowest ccbar-states with quantum numbers J(PC)=0(-+) [eta_c], 1(--) [J/psi], and 1(+-) [hc] by using lattice QCD and QCD sum rules. We consider the coupling of J/psi to both the vector and tensor currents. Lattice QCD results are obtained from the unquenched (Nf=2) simulations using twisted mass QCD at four lattice spacings, allowing us to take the...

Prof.
Biagio Lucini
(University of Swansea)

04/07/2014, 16:10

Lattice QCD

Oral presentation

It has been known for a long time that large-N methods can
give invaluable results into non-perturbative phenomena such as
confinement. Lattice techniques can be used to compute quantities at
large N. In this talk, I will review some recent large-N lattice
results and discuss their implications for our understanding of
non-perturbative QCD.

Dr.
Mateusz Koren
(Instituto de Física Teórica UAM/CSIC)

04/07/2014, 16:30

Lattice QCD

Oral presentation

We analyze 2+1 dimensional Yang-Mills theory regularized on a lattice. We employ twisted boundary conditions in the spatial directions and show, using both perturbation theory and non-perturbative simulations, that the physical quantities depend only on the combination NL/b and the magnetic flux given by the twist (N is the number of colors, L the length of the spatial torus and b is the...

Dr.
Jie Lu
(IFIC, University of Valencia)

04/07/2014, 16:50

Lattice QCD

Oral presentation

We study the Effective Field Theory of three QCD-like theories: which can be classified by having quarks in a complex, real or pseudo-real representation of gauge group. We wrote their effective field theories in a very similar way so that the calculations can be done using techniques from chiral perturbation theory.
We calculated the vacuum-expectation-value, the mass and the decay constant...

Dr.
Axel Maas
(University of Jena)

04/07/2014, 17:10

Lattice QCD

Oral presentation

The Higgs sector of the standard model, the Higgs and the W/Z bosons, is a quite peculiar theory. Because of the Higgs effect, for some regions of the quantum phase diagram of the theory the observable particles, i.e. gauge-invariant bound states, have the same mass as the elementary particles. This is what makes perturbation theory in the electroweak sector possible. Under which conditions...

Dr.
Antonin Portelli
(University of Southampton)

05/07/2014, 11:30

Lattice QCD

Oral presentation

Isospin symmetry is explicitly broken in the Standard Model by the non-zero differences of mass and electric charge between the up and down quarks. Both of these corrections are expected to have a comparable size of the order of one percent relatively to hadronic energies. Although these contributions are small, they play a crucial role in hadronic and nuclear physics. We explain how to...

Gregorio Herdoiza
(KPH Mainz & IFT Madrid)

05/07/2014, 12:00

Lattice QCD

Oral presentation

The anomalous magnetic moment of the muon, g-2, is one of the most
promising observables to identify the signs of physics beyond the
Standard Model. QCD contributions are currently responsible for the
largest fraction of the overall theoretical uncertainty in the
determination of the muon g-2, and in the running of the QED coupling
constant. Studies of the vacuum polarisation function and...

Dr.
Eigo Shintani
(Mainz Univ.)

05/07/2014, 12:30

Lattice QCD

Oral presentation

I would like to present current progress of lattice calculation of muon g-2 for light-by-light contribution. We forcus on the lattice calculation of non-perturbative contribution to neutral pion to two-photon decay transition form factor in light-by-light diagram. In this talk I will also compare with the direct computation in QED+QCD lattice simulation.

Dr.
Jonna Koponen
(University of Glasgow)

05/07/2014, 12:50

Lattice QCD

Oral presentation

We describe a new technique (presented in arXiv:1403.1778) to determine the contribution to the anomalous magnetic moment of the muon coming from the hadronic vacuum polarization using lattice QCD. Our method uses Padé approximants to reconstruct the Adler function from its derivatives at q^2=0. These are obtained simply and accurately from time-moments of the vector current-current correlator...

Santiago Peris
(U. Autonoma de Barcelona, Spain)

05/07/2014, 13:10

Lattice QCD

Oral presentation

(See Attached file.)
In order to test the systematic error coming from the extrapolation at low $Q^2$ carried out in present lattice determinations of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment, we employ a physically motivated model for the isospin-one non-strange vacuum polarization function $\Pi(Q^2)$ [1]. The model is based on the OPAL...