Jesse Thaler
(MIT)
08/09/2014, 09:00
Plenary talks
This plenary talk will cover the latest development in jet substructure at the LHC.
Dr
Alfredo Urbano
(IFAE, Universitat Autonoma de Barcelona & Università del Salento (Lecce, Italy)),
Domènec Espriu
(ICCUB - Universitat de Barcelona),
Erich Poppitz
(U.Toronto),
Giacomo Cacciapaglia
(IPN Lyon),
Michael Rauch
(Univ. Karlsruhe, KIT),
Thomas Ryttov
(CP3 - Origins)
08/09/2014, 11:00
John Bulava
(Trinity College Dublin)
08/09/2014, 12:00
Plenary talks
Excited hadron properties are of great experimental and theoretical interest. Recent algorithmic advances in Lattice QCD have enabled many low-lying hadron resonances to be studied with unprecedented accuracy, while several interesting systems remain a challenge. After discussing algorithmic advances which enable the calculation of finite volume QCD spectra, I will discuss how physical...
Matthew Shepherd
(Indiana University)
08/09/2014, 12:30
Plenary talks
The study of bound states of a heavy quark and anti-quark continues to be an interesting way to probe QCD and the hadron spectrum. Even more interesting are those states that have masses similar to heavy quarkonium but cannot by interpreted as a bound state of a heavy quark and heavy anti-quark. For example, there have been recent discoveries of new states in the charmonium spectrum that...
Michael Rauch
(Univ. Karlsruhe, KIT)
08/09/2014, 14:00
Section G: Strongly Coupled Theories
In 2012 a resonance at around 126 GeV was discovered at the LHC in the
Higgs search channels. Since then, work has continued to verify that it
is indeed the Standard Model (SM) Higgs boson which has been found, or
to find deviations from the SM predictions, which would point to new
physics.
In this talk I will summarize the current experimental results on the
Higgs boson and discuss...
Dr
Jeremy Green
(Institut für Kernphysik, Johannes Gutenberg-Universität Mainz)
08/09/2014, 14:00
Section B: Light Quarks
Recent progress in lattice QCD calculations of hadron structure will
be presented, with an emphasis on nucleon structure. Calculations of
nucleon form factors have long been difficult to reconcile with
experiment, but with advances in both methodology and computing
resources, this situation is changing. Agreement with experiment is
beginning to be obtained for several key observables, and...
Pasquale Di Nezza
(Istituto Nazionale Fisica Nucleare (IT))
08/09/2014, 14:00
Section D: Deconfinement
Hard partons produced in the initial stage of heavy-ion collisions are ideal probes to study the quark-gluon plasma (QGP). Those hard partons, that fragment into jets, experience a sizable energy degradation as they traverse the hot and dense medium generated in ultra-relativistic heavy-ion collisions. At the LHC regimes, the phenomena connected to the jet quenching unveils new interesting...
Eduardo Fraga
(Universidade Federal do Rio de Janeiro)
08/09/2014, 14:00
Section F: Nuclear and Astroparticle Physics
In recent years, there have been several successful attempts to constrain the equation of state of neutron star matter using input from low-energy nuclear physics and observational data. We demonstrate that significant further restrictions can be placed by additionally requiring the pressure to approach that of deconfined quark matter at high densities. Remarkably, the new constraints turn out...
Alexander Andrianov
(Saint Petersburg State University)
08/09/2014, 14:00
Section A: Vacuum Structure and Confinement
The low energy realization of QCD in terms of mesons is studied when an axial chemical potential is present; a situation that may be relevant in heavy ion collisions. We also consider the ‘two flavour’ Nambu–Jona-Lasinio model in the presence of a vector and an axial external chemical potential as a QCD replica and study the phase structure of the model at zero temperature. The presence of an...
Jan Hartmann
(Bonn University)
08/09/2014, 14:00
Section B: Light Quarks
One of the remaining challenges within the standard model is to gain a good understanding of QCD in the low-energy, non-perturbative regime. One key towards this aim is baryon spectroscopy investigating the spectrum and the properties of baryon resonances. Unfortunately, most baryon spectroscopy data were obtained only using $\pi$ N scattering. To gain access to resonances with small $\pi$ N...
Sergey kolevatov
(SPbSU)
08/09/2014, 14:20
Section F: Nuclear and Astroparticle Physics
There is no precise theory describing the structure of neutron stars. However, inside such objects the baryon density is very high and a pion condensation may occur. This condensate, if it exist, might give a significant effect on a spectrum of neutron stars. We investigate this influence with a help of simplified model to give qualitative picture of the effect.
Barbara Betz
(Frankfurt University)
08/09/2014, 14:30
Section D: Deconfinement
Results based on a generic dE/dx-model that interpolates between running coupling pQCD based models such as CUJET2.0 and AdS/CFT-inspired holographic prescriptions are compared to recent data on the high-pT pion nuclear modification factors and the high-pT elliptic flow in nuclear
collisions at RHIC and LHC. The jet-energy loss models are coupled to state-of-the-art viscous hydrodynamic...
Dr
Alexey Vladimirov
(Lund University)
08/09/2014, 14:30
Section B: Light Quarks
We present the method of calculation of leading logarithms for the nucleon sector of chiral perturbation theory in heavy baryon formulation and in the relativistic invariant formulation. We have studied the leading logarithm behavior of the nucleon mass up and present the expression for it up to four-loop order exactly. We also present some results up to six-loop order as well as all-order...
Volker Crede
(Florida State University)
08/09/2014, 14:30
Section B: Light Quarks
Nucleons are complex systems of confined quarks and gluons and exhibit the characteristic spectra of excited states. These states serve as an excellent probe of quantum chromodynamics (QCD), the fundamental theory of strong interaction. Highly-excited states are sensitive to the details of quark confinement, which is only poorly understood within QCD. This is the regime of non-perturbative QCD...
Victor Braguta
(Institute for High Energy Physics)
08/09/2014, 14:30
Section A: Vacuum Structure and Confinement
The axial magnetic field, which couples to left- and right-handed fermions with opposite signs, may generate an equilibrium dissipationless energy flow of fermions in the direction of the field even in the presence of interactions. In this report numerical observation of the Axial Magnetic Effect in SU(2) lattice gauge theory is presented. The temperature behavior of the Axial Magnetic Effect...
Andreas SCHMITT
(Vienna University of Technology)
08/09/2014, 14:40
Due to magnetic catalysis, a strong magnetic field enhances the chiral condensate and thus can also be expected to increase the vacuum mass of nucleons. I will discuss resulting effect on the transition between vacuum and nuclear matter at zero temperature within two relativistic field-theoretical models. The results show that the creation of nuclear matter in a sufficiently strong magnetic...
Miha Mihovilovic
(Johannes Gutenberg-Universitaet Mainz)
08/09/2014, 14:50
Section B: Light Quarks
The discrepancy between the proton charge radius extracted
from the muonic hydrogen Lamb shift measurement and the best present
value obtained from the elastic scattering experiments, remains
unexplained and represents a burning problem of today's nuclear physics.
After more than 50 years of research the radius of a basic
constituent of matter is still not understood.
This...
Brynmor Haskell
(The University of Melbourne)
08/09/2014, 15:00
Section F: Nuclear and Astroparticle Physics
Neutron stars are one of the most exciting nuclear laboratories in the universe. With internal densities above nuclear saturation density and temperatures well below the Fermi temperature, they allow us to prove a regime of the strong interaction that is not accessible in terrestrial laboratories. In particular neutron stars are likely to be interesting sources of gravitational waves, which...
Ralf W. Gothe
(University of South Carolina)
08/09/2014, 15:00
Section B: Light Quarks
Meson-photoproduction measurements and their reaction-amplitude analyses can establish more sensitively, and in some cases in an almost model-independent way, the nucleon excitations and non-resonant reaction amplitudes. However, to investigate the strong interaction from explored – where meson-cloud degrees of freedom contribute substantially to the baryon structure – to still unexplored...
Edmond Iancu
(Institut de Physique Théorique de Saclay)
08/09/2014, 15:00
Section D: Deconfinement
We discuss average properties of the gluon cascade generated by an energetic parton propagating through a dense QCD medium. The cascade is mostly made with relatively soft gluons, whose production is not suppressed by the LPM effect. Unlike for usual QCD cascades in the vacuum, where the typical splittings are very asymmetric (soft and collinear), the medium-induced branchings are...
Pavel Buividovich
(Regensburg University)
08/09/2014, 15:00
Section A: Vacuum Structure and Confinement
We study interacting Dirac fermions with chirality imbalance in the mean-field approximation and find that the chiral imbalance is strongly enhanced due to spontaneous chiral symmetry breaking. This result is valid both for the breaking of the exact chiral symmetry and for the pion condensation phase in the case of Wilson-Dirac fermions. We then consider the Chiral Magnetic Effect (CME) in the...
Ignasi Rosell
(Universidad CEU Cardenal Herrera & IFIC, Valencia)
08/09/2014, 15:00
Section G: Strongly Coupled Theories
We study strongly coupled models of electroweak symmetry breaking with a light Higgs boson. We use a resonance effective Lagrangian with bosonic massive resonances together with the Standard Model degrees of freedom, including a light Higgs. We consider constraints from the phenomenology and from the assumed high-energy behavior of the underlying theory. This resonance effective theory can be...
Ian Jones
(University of Southampton)
08/09/2014, 15:20
Section F: Nuclear and Astroparticle Physics
In this talk I will describe how spinning neutron stars can produce long-lived gravitational wave signals. I will explain how the strength of this emission relates to the properties of the star, and describe the connection with the properties of matter at very high density. I will also describe efforts to detect such gravitational waves directly, and outline the key issues in this large...
Anton Rebhan
(Vienna University of Technology)
08/09/2014, 15:20
Section G: Strongly Coupled Theories
The glueball spectrum of Witten's model for nonsupersymmetric Yang-Mills theory from type IIA supergravity is discussed with regard to the Sakai-Sugimoto model, which introduces chiral quarks through probe D8 branes. The couplings of glueballs with the mesons are worked out, leading to almost parameter-free predictions for the decay rates of glueballs.
Clara Peset
(Universitat Autonoma de Barcelona /IFAE)
08/09/2014, 15:20
Section B: Light Quarks
We obtain a model independent expression for the muonic hydrogen Lamb shift. The leading hadronic effects are controlled by the chiral theory, which allows for their model independent
determination. We give their complete expression including the pion and Delta particles. Out of this analysis and the experimental measurement of the muonic hydrogen Lamb shift we determine the electromagnetic...
Victor Petrov
(Petersburg Nuclear Physics Institute)
08/09/2014, 15:30
Section A: Vacuum Structure and Confinement
We consider a model for the vacuum of pure glue theory based on dyons. Temperatures of confinement-deconfinement, string tensions and other physical quantities for different gauge groups and representations are calculated. The relation with supersymmetric confining theories is discussed.
Considered mechanism of confinement/deconfinement implies specific behavior of the effective potential...
Bronislav Zakharov
(Landau Institute)
08/09/2014, 15:30
Section D: Deconfinement
We study jet quenching in $pp$ and $pA$ collisions in the scenario with
formation of a mini quark-gluon plasma.
We find a significant suppression effect. For light hadrons
at $p_{T}\sim 10$ GeV we obtained the reduction of the spectra
by $\sim [20-30,25-35,30-40]$% in $pp$ collisions at
$\sqrt{s}=[0.2, 2.76,7]$ TeV.
We also give predictions for modification of the photon-tagged
and...
Simon Eidelman
(Novosibirsk State University)
08/09/2014, 15:30
Section B: Light Quarks
Experiments on e+e- annihilation into hadrons performed with the CMD-3
and SND detectors at the VEPP-2000 collider in Novosibirsk are described.
We report preliminary results on various two-body and multibody final states
obtained with the integrated luminosity of 60/pb per detector in the
center-of-mass energy range 320 MeV to 2000 MeV. Various applications
of these measurements, in...
Jose R. Pelaez
(Universidad COmplutense)
08/09/2014, 15:40
Section B: Light Quarks
We study the large Nc behavior of couplings among light meson states with
different compositions in terms of quarks and gluons. We shortly review the
most common compositions of mesons, which are of interest for the
understanding of low-lying meson resonances, namely, the ordinary
quark-antiquark states as well as the non-ordinary, glueball, tetraquark,
etc. We dedicate special attention...
Nilmani Mathur
(Tata Institute of Fundamental Research)
08/09/2014, 16:30
Section B: Light Quarks
Baryon spectroscopy has played a crucial role in formulating the theory of strong interaction, particularly in the low-energy regime. In this talk I will review the recent progress in the excited state spectroscopy of baryons using lattice QCD and the implications of these results. In particular, excited state spectroscopy of heavy baryons will be emphasized where the experimental efforts are...
Stefan Petschauer
(TU München)
08/09/2014, 16:30
Section F: Nuclear and Astroparticle Physics
We use SU(3) chiral effective field theory to describe the two- and three-baryon forces. Results for the hyperon-nucleon interaction at next-to-leading order are reported. These potentials include one- and two-meson exchange diagrams as well as contact terms with SU(3) symmetric low-energy constants. Furthermore we present potentials for the leading order three-baryon interactions, which...
Jaume Tarrus Castella
(Technische Universität München)
08/09/2014, 16:30
Section C: Heavy Quarks
During the past years experimental observations have revealed the existence of a large number of states above open flavor thresholds that can not be identified as standard heavy quarkonium states. In this talk we discuss the possibility that some of these states are heavy quarkonium hybrids. Heavy quarkonium hybrids are states formed by a heavy quark-antiquark pair in a color octet...
Lev Lipatov
(Petersburg NPI)
08/09/2014, 16:30
Section G: Strongly Coupled Theories
We remind, that the high energy behavior of scattering amplitudes in QCD is described by the BFKL equation for the pomeron as a composite state of reggeized gluons. In
the leading logarithmic approximation its hamiltonian has a number of remarkable properties including its Moebius invariance, holomorphic separability and integrability.
These properties are valid also for the BKP equation...
Prof.
Kei-Ichi Kondo
(Chiba University, Japan)
08/09/2014, 16:30
Section A: Vacuum Structure and Confinement
We propose a reformulation of the SU(N) Yang-Mills theory toward quark confinement and mass gap. In fact, we have given a number of new reformulations for the SU(N) Yang-Mills theory using new field variables, other than the framework given by Cho, Faddeev and Niemi, which is included in our reformulations as a special case called the maximal option. The advantage of the reformulations is...
Reinhard Stock
(Johann-Wolfgang-Goethe Univ. (DE))
08/09/2014, 16:30
Section D: Deconfinement
The QCD phase transformation line in the plane of temperature T and baryochemical potential mu(B) represents the major property of the QCD phase diagram at finite temperature and mu(B). Recent lattice QCD calculations(1,2) have made predictions for this line, not only at mu(B) near zero but also extending to finite mu(B), up to about 500MeV. At the experimental side, the hadronic...
Takayuki Matsuki
(Tokyo Kasei University)
08/09/2014, 16:50
Section C: Heavy Quarks
In the past decade, many of charmoniumlike and bottomoniumlike states have been reported in experiments, which have led us to extensive discussions on the underlying structure of these states. We would like to address the possibility to explain these structures by hadronic one-loop diagrams, which may correspond to recapitulate threshold effects. Starting from charged XYZ states, we also apply...
Evgeny Epelbaum
(University of Bochum)
08/09/2014, 16:50
Section F: Nuclear and Astroparticle Physics
I review recent progress in the application of chiral effective field theory
to nuclear forces and low-energy nuclear observables. Both the continuum
and the lattice formulations will be addressed.
Prof.
Kalman Szabo
(Forschungszentrum Juelich)
08/09/2014, 17:00
Section B: Light Quarks
We compute the neutron-proton mass splitting and show that it is greater than zero by five standard deviations. Furthermore, splittings in the Sigma, Xi, D and Xi_cc isospin multiplets are determined providing also predictions. We perform lattice Quantum-Chromodynamics plus Quantum-Electrodynamics computations with four, non-degenerate Wilson fermion flavors. Four lattice spacings and pion...
Akihiro Shibata
(High Energy Accelerator Research Organization (KEK))
08/09/2014, 17:00
Section A: Vacuum Structure and Confinement
We have pointed out that the SU(3) Yang-Mills theory has a new way of reformulation
using new field variables (minimal option), in addition to the conventional option
adopted by Cho, Faddeev and Niemi (maximal option). The reformulation enables us to change the original non-Abelian gauge field into the new field variables such that one of them called the restricted field gives the...
Shinji Ejiri
(Niigata University)
08/09/2014, 17:00
Section D: Deconfinement
We study the phase structure of QCD at high temperature and density by lattice QCD simulations focusing on the probability distribution function (histogram).
First, we investigate the quark mass and chemical potential dependence of the probability distribution functions as functions of appropriate physical quantities when all quark masses are sufficiently large.
Through the shape of the...
Erich Poppitz
(university of toronto)
08/09/2014, 17:00
Section G: Strongly Coupled Theories
I will review the conjecture that the thermal deconfinement transition in pure Yang-Mills theory is continuously connected to a quantum phase transition in softly-broken N=1 supersymmetric Yang-Mills theory on R^3 x S^1. The latter is driven by a competition between various exotic ``topological" molecules, and, since it occurs in a calculable weak-coupling regime, a great deal can be learned...
Sasa Prelovsek
(University of Ljubljana)
08/09/2014, 17:10
Section C: Heavy Quarks
I will present the first evidence for the existence of the charged charmonium-like Zc+ from lattice QCD. The results on the other charmonium and charmonium-like states will also be reviewed.
Yoichi Ikeda
(RIKEN)
08/09/2014, 17:10
Section F: Nuclear and Astroparticle Physics
One of the interesting subjects in hadron physics is to look for the multiquark configurations. One of candidates is the H-dibaryon (udsuds), and the possibility of the bound H-dibaryon has been recently studied from lattice QCD.
We also extend the HAL QCD method to define potential on the lattice between baryons to meson-meson systems including charm quarks to search for the bound tetraquark...
Guido Martinelli
(Scuola Int. Superiore di Studi Avanzati (IT))
08/09/2014, 17:30
Section B: Light Quarks
A new strategy to compute electromagnetic corrections to weak transitions is presented. The specific case of $\Gamma(\pi^H+ \to l^H+ \nu + \gamma)$ is discussed in detail, and possible extensions of the method will also be discussed.
Irina Aref'eva
(Steklov Mathematical Institute, Moscow)
08/09/2014, 17:30
Section G: Strongly Coupled Theories
Dual holographic approach provides a powerful tool to study the static
properties of QGP as well as its thermalization.
There are models that reproduce perfectly the static properties of QGP,
meanwhile others models are used to reproduce non-static characteristics,
for example the charged multiplicity dependence on the energy.
We propose a holographic background that reproduces at...
Anton Trunin
(BLTP JINR)
08/09/2014, 17:30
Section C: Heavy Quarks
On the basis of perturbative QCD and relativistic quark model we calculate cross sections of pair double heavy diquarks production in proton-proton interaction. Both, nonrelativistic and relativistic results are obtained. Relativistic factors in the production amplitude connected with the relative motion of heavy quarks and the transformation law of the bound state wave function to the...
Jon-Ivar Skullerud
(National University of Ireland Maynooth)
08/09/2014, 17:30
Section D: Deconfinement
The FASTSUM collaboration has been carrying out simulations of $N_f=2+1$ QCD at high temperature in the fixed-scale approach using anisotropic lattices. I will present the status of these studies, including recent results for charmonium physics and the deconfinement transition.
Philipp Gubler
(RIKEN)
08/09/2014, 17:30
Section F: Nuclear and Astroparticle Physics
The behavior of the $\phi$ meson at finite density is studied, making use of a QCD sum rule approach in combination with the maximum entropy method. It is demonstrated that a
possible mass shift of the $\phi$ in nuclear matter is strongly correlated to the strangeness content of the nucleon, which is proportional to the strange sigma term, $\sigma_{sN}$. In contrast to earlier studies, our...
Melahat Bayar
(Kocaeli University)
08/09/2014, 17:50
Section C: Heavy Quarks
We present a study of the many-body interaction between a $D^*$ and multi-$\rho$. We use an extrapolation to SU(4) of the hidden gauge formalism, which produced dynamically the resonances $f_2(1270)$ in the $\rho\rho$ interaction and $D^*_2(2460)$ in the $\rho D^*$ interaction. Then let a third particle, $\rho$, $D^*$, or a resonance collide with them, evaluating the scattering amplitudes in...
Oton Vazquez Doce
(Excellence Cluster Universe, TU-Munich.)
08/09/2014, 17:50
Section F: Nuclear and Astroparticle Physics
The hyperon-pion and hyperon-nucleon(s) correlations following K- nuclear absorption in Helium and Carbon were investigated with the KLOE drift chamber and the results will be presented. To this end, KLOE [1] data (from 2004-2005) was analyzed using the detector itself as an active target. Also results from a more recent run (end of 2012) with a dedicated solid Carbon target will be...
Michael Lublinsky
(Ben-Gurion University of the Negev)
08/09/2014, 18:00
Section G: Strongly Coupled Theories
Using fluid/gravity correspondence, we determined the (linearized) stress energy tensor of N = 4 super-Yang-Mills theory at strong coupling with all orders of the boundary derivative included. We found that the dissipative effect is totally encoded in the shear term and a newly appeared one starting from third order. In the hydrodynamic regime, we analytically obtained the stress tensor up to...
Kenji Fukushima
(The University of Tokyo)
08/09/2014, 18:00
Section D: Deconfinement
We discuss the effect of curved spacetime on QCD phase transitions. We point out a common feature that fermions are always gapped with a curvature in a way consistent with chiral symmetry, which we call the chiral gap effect. We can have intuitive understanding of the behavior of the chiral condensate as a function of positive and negative curvatures. We also address the decoupling of the...
Andria Agadjanov
(University of Bonn)
08/09/2014, 18:00
Section B: Light Quarks
Lattice quantum chromodynamics (LQCD) provides an ab initio way to study the non-perturbative aspects of strong interaction. In recent years, it plays a more significant role in experimental physics.
The studies of the different electromagnetic and weak processes on the lattice are of particular interest. Some of the important processes proceed through the resonances. However, the...
Susan Gardner
(U.Kentucky,USA)
09/09/2014, 09:00
Plenary talks
New Physics Searches at the Intensity Frontier: QCD Challenges and Prospects
Jens Erler
(IF-UNAM)
09/09/2014, 10:00
Plenary talks
An overview of precision determinations of the strong coupling constant, as well as the top, bottom and charm quark masses is presented.
Federico Mescia
(Universitat de Barcelona)
09/09/2014, 11:00
Plenary talks
I will present a summary of what we learned so far from low-energy flavour
observables, concerning on physics beyond the Standard Model
(SM). In the past few years there has been a great experimental progress in
quark and lepton flavour physics. In the quark sector, the validity of the SM
has been strongly reinforced by a series of challenging tests.
As I try to show, looking for physics...
Johan Bijnens
(Lund University)
09/09/2014, 11:30
Plenary talks
I will give an overview of mesonic Chiral Perturbation Theory concentrating on recent developments.
Elisabetta Pallante
(U. Groningen, Netherlands),
Federico Mescia
(Universitat de Barcelona),
Gilberto Colangelo
(Bern University),
Guido Martinelli
(Scuola Int. Superiore di Studi Avanzati (IT)),
Shoji Hashimoto
(KEK)
09/09/2014, 12:00
Prof.
Jeff Greensite
(San Francisco State University)
09/09/2014, 14:00
Section A: Vacuum Structure and Confinement
The method of relative weights is used to extract, from an underlying SU(3) lattice gauge theory at finite chemical potential, an effective theory which depends only on Polyakov line holonomies. The effective theory can be solved by both mean field and complex Langevin methods, and the solutions from the two approaches can be compared. It is found that when the two methods agree, they agree...
Gilberto Colangelo
(Bern University)
09/09/2014, 14:00
Section B: Light Quarks
I will describe our recent dispersive analysis of the hadronic light-by-light tensor. We relate the latter to the helicity amplitudes of the process $\gamma^* \gamma^* \to \pi \pi$ and provide a formula for the calculation of the hadronic light-by-light contribution to $(g-2)_\mu$.
Mr
Simone Biondini
(TUM)
09/09/2014, 14:00
Section F: Nuclear and Astroparticle Physics
Cosmology and particle physics come across a tight connection in the attempt
to reproduce quantitatively the results of experimental findings. Indeed, the
dark matter relic abundance and the amount of baryon asymmetry in the universe are accurately determined by the recent analysis of the cosmic microwave
background.
Majorana fermions enter in many scenarios of physics beyond the...
Javier Fuentes
(Instituto de Fisica Corpuscular)
09/09/2014, 14:00
Section E: QCD and New Physics
Instanton solutions of non-abelian Yang-Mills theories generate an effective action that may induce lepton and baryon number violation, namely $\Delta B = \Delta L = N_f$, being $N_f$ the number of families coupled to the gauge group. It is well known that within the Standard Model the size of the violation is negligible, however this might not be longer true in non-universal gauge extended...
Prof.
Chengping Shen
(Beihang University, Beijing)
09/09/2014, 14:00
Section C: Heavy Quarks
Using a 980 fb-1 data sample collected with the Belle detector on or near Y(nS), n=1, 2, ..., 5, the production cross sections of e+e- →K+K-J/Ψ, KsKs J/Ψ, ɣ χcJ, π+π-Ψ(2S) are measured. The properties of the Y(4360) and Y(4660) in π+π-Ψ(2S) mode are updated, and no significant signal is observed in ɣ χcJ, mode, except those from the Ψ(2S) decays. The possible charged charmoniumlike structures...
Prof.
Liping Gan
(University of North Carolina Wilmington, USA)
09/09/2014, 14:20
Section E: QCD and New Physics
Decays of the $\eta$ meson provide a unique, flavor-conserving laboratory to probe the isospin violating sector of low energy QCD and search for new physics beyond the Standard Model. The JEF Experiment has been developed in Hall D at Jlab to measure $\eta$ decays emphasizing on rare neutral modes with two orders of magnitude background reduction compared to the previous experiments. The...
Dr
Laura Tolos
(ICE)
09/09/2014, 14:20
Section F: Nuclear and Astroparticle Physics
We study the shear and bulk viscosity coefficients as well as the thermal conductivity as arising from the collisions among phonons in superfluid neutron stars. We use effective field theory techniques to extract the allowed phonon collisional processes, written as a function of the equation of state and the gap of the system.
We analyze the shear viscosity taking into account the...
Umberto Tamponi
(Universita e INFN, Torino (IT))
09/09/2014, 14:25
Section C: Heavy Quarks
The description of single meson transitions among quarkonium states represent both a challenging topic for current non-relativistic QCD models and a powerful tool for the study of the dynamic in heavy quarks systems. In particular, theoretical debates arose around the role of mesonic molecules and coupled channel effects in the description of the single meson transitions from Y(4S) and...
Thomas Schaefer
(North Carolina State University)
09/09/2014, 14:30
Section A: Vacuum Structure and Confinement
Finding controlled, analytical approaches to the deconfinement
transition in QCD is an old problem. Here we present a weak
coupling calculation of the deconfinement transition in a deformed
version of QCD. The deformation involves adding a fermion in the
adjoint representation, subject to twisted boundary condistions
along the thermal circle. We argue that the transition in the...
Michael Lublinsky
(Ben-Gurion University of the Negev)
09/09/2014, 14:30
Section D: Deconfinement
We present a construction of an effective high energy QCD Hamiltonian at NLO accuracy.
This Hamiltonian is an NLO extension of the JIMWLK LO Hamiltonian, known to incorporate BFKL dynamics with gluon saturation phenomena. We are to demonstrate how the conformal symmetry is realized within the NLO JIMWLK.
Dr
Marc KNECHT
(CNRS - CPT Marseille)
09/09/2014, 14:30
Section B: Light Quarks
Isospin breaking in the $K_{\ell 4}$ form factors induced by the difference between charged and
neutral pion masses is discussed within a framework built on suitably subtracted dispersion representations. The $K_{\ell 4}$ form factors are constructed in an iterative way up to two loops in the low-energy expansion by implementing analyticity, crossing, and unitarity due to two-meson...
Semyon Pozdnyakov
(Saint Petersburg State University)
09/09/2014, 14:40
Section E: QCD and New Physics
![$A_{+}^{B_{1}} A_{+}^{B_{1}}A_{-}^{b_{1}}A_{-}^{b_{2}}V_{\nu}^{d}$ effective vertex (left); process of interaction of two quark pairs (right)][1]
We study the processes of nucleus-nucleus interaction. The bulk of the amplitude can be represented in terms of pomerons propagating from the multi-nucleon projectile to the multi-nucleon target. The pomeron couples to the separate...
Matthias Drews
(Technische Universitaet Muenchen)
09/09/2014, 14:40
Section F: Nuclear and Astroparticle Physics
A chiral model based on nucleons interacting via boson exchange is investigated. Fluctuation effects are then included consistently beyond the mean-field approximation in the framework of the functional renormalization group. The liquid-gas phase transition of symmetric nuclear matter is studied in detail. No sign of a chiral restoration is found up to 100 MeV temperature and about three times...
Vicent Mateu
(University of Vienna)
09/09/2014, 14:50
Section C: Heavy Quarks
We present results for the production of primary heavy quarks in final state jets, as well as secondary radiation of heavy quark pairs related to gluon splitting. We focus in the thrust and C-parameter distributions for e+e- collisions. The results are given in the dijet limit where the hard interaction scale and the scales related to collinear and soft radiation are widely separated. In this...
Dr
Andrea Shindler
(DESY Zeuthen)
09/09/2014, 15:00
Section E: QCD and New Physics
With the gradient flow, we propose to calculate the QCD component of key beyond the Standard Model (BSM) matrix elements related to quark and strong theta-CP violations and the strange scalar content within the nucleon. The former set of matrix elements impacts our understanding of Electric Dipole Moments (EDMs) of nucleons and nuclei (a key signature of BSM physics), while the latter...
Eero Aleksi Kurkela
(CERN)
09/09/2014, 15:00
Section D: Deconfinement
It is a commonly held belief that weak coupling dynamics are in contradiction with the apparently fast thermalization observed in heavy-ion collisions at RHIC and at the LHC. This belief is based on parametric estimates and naturalness arguments in the Bottom-up picture of thermalization of Baier, Mueller, Schiff, and Son. In my talk, I will discuss elevating this parametric picture into a...
Joao Moreira
(Centro de Fisica Computacional, Departamento de Fisica da Universidade de Coimbra)
09/09/2014, 15:00
Section F: Nuclear and Astroparticle Physics
The possible existence of nonuniform phases in cold dense quark matter in the light quark sector (u, d and s) is adressed using the Nambu--Jona-Lasinio Model extended to include flavor-mixing 't Hooft determinant. The effect of changes in the coupling strengths of the model as well as that of the value of the current mass of the strange quark is discussed.
It is seen that the inclusion of the...
Dr
Jan (for the COMPASS collaboration) Friedrich
(CERN / TU Munich)
09/09/2014, 15:00
Section B: Light Quarks
With the COMPASS experiment at CERN, pion-photon reactions are investigated
via the Primakoff effect, implying that high-energetic pions react with the
quasi-real photon field surrounding the target nuclei.
The production of a single hard photon in such a pion scattering,
at lowest momentum transfer to the nucleus, is related to pion Compton
scattering. From the measured ...
Pineda Antonio
(Universitat Autonoma de Barcelona)
09/09/2014, 15:00
Section A: Vacuum Structure and Confinement
We obtain the asymptotic behavior of the perturbative expansion of the pole mass and the plaquette by computing the self-energy of an static quark and
the plaquette to order alpha^{20} and alpha^{35} respectively. The results fully confirm renormalon expectations. Confronting these results with nonperturbative lattice data we confirm the OPE beyond perturbation theory (no dimension two...
Dr
Sergey Larin
(Institute for Nuclear Research of the Russian Academy of Sciences)
09/09/2014, 15:20
Section E: QCD and New Physics
It is shown that the QCD Lagrangian can be modified by the adding gluon masses.
On mass-shell renormalizability of the resulting theory is discussed.
Dr
Ricciardi Giulia
(Dipartimento di Fisica Univ. di Napoli Federico II)
09/09/2014, 15:20
Section C: Heavy Quarks
We review recent progress on semileptonic B decays
Alexei Yung
(Petersburg Nuclear Physics Institute)
09/09/2014, 15:30
Section A: Vacuum Structure and Confinement
Abstract
I discuss physical scenarios in different vacua of N=2 supersymmetric QCD
deformed by the mass term $\mu$
for the adjoint matter. This deformation breaks supersymmetry down to N=1
and at large $\mu$ the theory flows to N=1 QCD.
I focus on dynamical scenarios which can serve as a prototypes
of what we observe in the real world QCD.
In particular, I discuss the...
Andrei Alexandru
(The George Washington University, USA)
09/09/2014, 15:30
Section B: Light Quarks
Electromagnetic polarizabilities are important parameters for understanding the interaction
between photons and hadrons. For pions these quantities are poorly constrained experimentally since they can only be measured indirectly. New experiments at CERN and Jefferson Lab are planned that will measure the polarizabilities more precisely. Lattice QCD can be used to compute these quantities...
90.
A new look on signals of collective effects in AA and pA at LHC based on Modified Glauber Model.
Andrey Seryakov
(St. Petersburg State University (RU))
09/09/2014, 15:40
Section E: QCD and New Physics
G.Feofilov, A.Seryakov
We present current status of Modified Glauber Model (MGM) [1], which standard version is widely used for determination of centrality classes, for comparison AA and pA collision with pp data and for search collective effects. In MGM we take into account energy losses which are needed for particle production in each nucleon-nucleon collision. This proposal allowed us to...
Thomas Blum
(UCONN)
09/09/2014, 16:30
Section B: Light Quarks
After a brief introduction, I will review the current status of lattice calculations of the hadronic vacuum polarization and light-by-light scattering contributions to the muon anomalous magnetic moment. The errors on these contributions dominate the standard model error for this quantity and must be reduced to make the best use of new experimental measurements at Fermilab and J-PARC.
Hugo Reinhardt
(Universität Tübingen)
09/09/2014, 16:30
Section A: Vacuum Structure and Confinement
I will review recent results obtained within the Hamiltonian approach to QCD. I will focus on the description of the deconfinement phase transition by compactifying one spatial dimension.
Prof.
Gunnar Bali
(University of Regensburg)
09/09/2014, 16:30
Section D: Deconfinement
We present recent lattice results of magnetic properties of QCD matter obtained with 1+1+1 sea quarks at physical mass and several lattice spacings at zero and at non-zero temperatures.
The results include the phase diagram, the magnetization and the equation of state.
Vladimir Kovalenko
(St. Petersburg State University (RU))
09/09/2014, 16:30
Section D: Deconfinement
Studies of the collisions of various hadrons and nuclei at different centrality and energy enable to explore the QCD phase diagram over a wide range of temperature and baryon density in search of the critical point. In the framework of the string fusion approach [1] the critical behavior takes place when the processes of string fusion and percolation come into play, what can be considered as a...
Vladyslav Shtabovenko
(TUM)
09/09/2014, 16:30
Section F: Nuclear and Astroparticle Physics
The properties of quarkonia in a nuclear medium are still poorly known, yet they are very important for the description of photo- and hadro-production of quarkonium on nuclear targets (e.g. in experiments at the FAIR facility at GSI) as well as for the diagnostic of hadronic final states in heavy ion collisions at the LHC at CERN.
Interactions of heavy quarkonia with hadrons or...
Dr
Raquel Molina
(The George Washington University)
09/09/2014, 16:30
Section C: Heavy Quarks
Several observed states close to the D\bar{D}^* and D^*_{(s)}\bar{D}^*_{(s)} thresholds, as the X(3872) and some XYZ particles can be described in terms of a two-meson molecule. Furthermore, doubly charmed states are also predicted, named as R_{cc}(3970) and S_{cc}(4100). These new states are near the DD^*, D^*D^* and D^*D^*_s thresholds. We compute decays into DD\pi and radiative decays of...
Prof.
Vladimir Kopeliovich
(Institute for Nuclear Research of RAS)
09/09/2014, 16:50
Section F: Nuclear and Astroparticle Physics
We show analytically that in the cumulative particles production off
nuclei multiple interactions lead to a glory-like backward focusing effect. Employing
the small phase space method we arrived at a characteristic angular dependence of the production cross section $d\sigma \sim 1/ \sqrt {\pi - \theta}$ near the strictly backward direction. This effect takes place for any number $n\geq 3 $...
Paul Springer
(Technische Universität München)
09/09/2014, 16:50
Section D: Deconfinement
Studies of the QCD phase diagram at finite temperature and quark chemical potential are currently one of the most discussed topics in theoretical physics and are of great importance to better our understanding of heavy-ion collision experiments. However, the relation of confining and chiral dynamics is not yet completely understood. At vanishing chemical potential, results from lattice QCD...
Yasuhiro Yamaguchi
(R)
09/09/2014, 16:50
Section C: Heavy Quarks
Hadron as an impurity bound in nuclei causes interesting phenomena which
do not emerge in normal nuclei.
These effects would give us the information not only on the internal
structure of the nuclei, but also on the changing properties of the
impurity in the nuclear medium.
The hadron-nucleus systems have been studied in the light flavor
sector, especially.
However, a strong...
Markus Quandt
(Universität Tübingen)
09/09/2014, 17:00
Section A: Vacuum Structure and Confinement
We investigate the low-order Green's functions of *SU(N)* Yang-Mills
theory in Landau gauge, using a covariant variational principle based on the
effective action formalism. Employing an approximation to the Faddeev-Popov
determinant established previously in the Hamiltonian approach in Coulomb gauge
leads to a closed and renormalizable set of integral equations for the ghost and...
Prof.
Domènec Espriu
(ICCUB - Universitat de Barcelona)
09/09/2014, 17:00
Section D: Deconfinement
We investigate how local parity breaking due to fluctuations of the topological charge may affect hadron physics in heavy ion collisions. A distorted dispersion relation is derived for the lightest vector mesons ρ and ω and compared to the experimental results. The main characteristic of LPB is an invariant mass splitting that depends on the polarization. We present a detailed analysis of the...
Gernot Eichmann
(University of Giessen)
09/09/2014, 17:00
Section B: Light Quarks
The light-by-light scattering contribution to the muon anomalous magnetic moment is discussed from the Dyson-Schwinger perspective. The structure of the four-photon amplitude and the various slices of the phase space that play an important role for the muon g-2 are examined. The systematic construction of the four-photon vertex from the quark level satisfies electromagnetic gauge invariance by...
Keisuke Ohtani
(Tokyo Institute of Technology)
09/09/2014, 17:10
Section F: Nuclear and Astroparticle Physics
The QCD sum rule method is a powerful tool for studying hadron properties directly from QCD.
In this method, the correlation function of an interpolating field operator coupled to the hadron of interest,
which can be calculated in the deep Euclidean region by the operator product expansion (OPE),
is related to the hadronic spectral function. The non-perturbative contributions in the...
David R. Entem
(University of Salamanca)
09/09/2014, 17:10
Section C: Heavy Quarks
We study possible baryon molecules in the non-strange heavy baryon spectrum.
We include configurations with a heavy-meson and a light baryon. We find
several structures, in particular we can understand the $\Lambda_c(2940)$
as a $D^{\ast} N$ molecule with $J^P=3/2^-$ quantum numbers. We also find
$D^{(\ast)} \Delta$ candidates for the recently discovered $X_c(3250)$ and
$X_c(3212)$ resonances.
Prof.
Gennady Kozlov
(JINR)
09/09/2014, 17:10
Section D: Deconfinement
The critical phenomena of strongly interacting matter are presented in the frame of an effective theory at finite temperatures. The phase transitions are considered in systems where the critical end point (CEP) is a distinct singular feature existence of which is dictated by the chiral dynamics. The physical approach to the effective CEP is studied via the influence fluctuations of...
Mr
Kei Suzuki
(Tokyo Institute of Technology)
09/09/2014, 17:20
Section D: Deconfinement
Quantum chromodynamics (QCD) in strong magnetic field is one of the most exciting topic in hadron physics. Especially, one can expect that hadrons are modified by strong magnetic fields such as that produced in ultrarelativistic heavy-ion collisions. In this study, we investigate the properties of the heavy-light (D) meson in magnetic field. QCD sum rule (QCDSR) is a method to investigate the...
Marco Andrea Battaglieri
(INFN-Genova)
09/09/2014, 17:20
Section B: Light Quarks
The known hadron matter is made of two possible configurations: baryons, combination of 3 quarks and mesons, made by a quark and an anti-quark pair. QCD, the fundamental theory of strong interaction does not exclude the existence of states made by different combination of quarks and gluons: tetra-quarks, exotic and hybrid mesons, glue-balls. Precise determination of the hadron spectrum as well...
Matthieu Tissier
(Univ. P. and M. Curie)
09/09/2014, 17:30
Section D: Deconfinement
We discuss the breaking of center symmetry in pure SU(2) and SU(3) Yang-Mills theories at finite temperature. We explore this question using a perturbative approach within a massive extension of the background field gauge which is seen as a phenomenological way of taking into account the effect of the Gribov copies. At one-loop order, this simple perturbative calculation yields a second order...
Davide Campagnari
(Eberhard-Karls-Universität Tübingen)
09/09/2014, 17:30
Section A: Vacuum Structure and Confinement
The general method for treating non-Gaussian wave functionals in the Hamiltonian
formulation of a quantum field theory, which was previously proposed and developed for
Yang-Mills theory in Coulomb gauge, is generalized to full QCD. Exploiting Dyson-Schwinger
equation techniques, we express the various $n$-point functions, needed in expectation
values of observables like the Hamiltonian, in...
Kenji Sasaki
(Univ. of Tsukuva)
09/09/2014, 17:30
Section F: Nuclear and Astroparticle Physics
Knowledge of baryon-baryon interactions with strangeness is important to study the hypernuclear structures and exotic few body states.
Especially for the strangeness S=-2 two-baryon system, it is interesting to investigate the SU(3) structure and its breaking effect of baryon-baryon interactions because the flavor singlet combination is allowed only in this system.
We report our latest...
Dr
Weimin Song
(IHEP)
09/09/2014, 17:30
Section C: Heavy Quarks
The result results about Charmonium states ( etac(2S)... ) and Charmonium-like states
( Zc(3900)...) studied at BESIII will mentioned in the talk.
Sergey Bondarenko
(Ariel University)
09/09/2014, 17:40
Section D: Deconfinement
In our work we consider calculations of distribution function of the charged droplet in the electric field of
another, relativistically moving charged drop. Namely, we consider rotating charged droplet in transverse plane
which was created during the very first stage of interaction of two neutral objects in high-energy scattering. Due the small droplet's size, the thermalization of this...
Ramona Lea
(University and INFN Trieste)
09/09/2014, 17:50
Section F: Nuclear and Astroparticle Physics
Thanks to its excellent tracking performance and Particle Identification
capabilities, the ALICE detector allows for the identification of light
(anti-) (hyper-) nuclei and for the measurement of (multi-) strange particles
over a wide range of transverse momentum.
Deuterons, tritons, $\rm ^{3}{He}$ and $\rm ^{4}{He}$ and their corresponding
antinuclei are identified via their...
Prof.
Alexey Zhemchugov
(Joint Institute for Nuclear Research)
09/09/2014, 17:50
Section B: Light Quarks
Based on the world’s largest samples of J/psi, psi(3686) decays collected at the BESIII detector, the progresses on the hadron spectroscopy are presented, including the PWA of J/psi radiative decays, eta and eta’ physics.
Andrey Kotov
(ITEP)
09/09/2014, 17:50
Section D: Deconfinement
We present preliminary results of the study lattice SU(2) QCD phase diagram with chiral chemical potential. The simulation is carried out with dynamical staggered fermions without rooting. The dependences of the chiral density, Polyakov loop, chiral condensate and corresponding susceptibilities on the chiral chemical potential and temperature are measured.
Prof.
Stephen Lars Olsen
(Center for Underground Physics)
09/09/2014, 17:55
Section C: Heavy Quarks
Recently, many candidate multiquark mesons, i.e., mesons with substructures that are more complex that the quark-antiquark prescription that is in the textbooks, have been observed. Many of the most recently observed candidate states are electrically charged and have the same spin and parity, namely JP=1+. In this talk I will give an overview of the current experimental situation and try to...
Tamer Boz
(National University of Ireland, Maynooth)
09/09/2014, 18:10
Section D: Deconfinement
QCD at high chemical potential has interesting properties such as deconfinement of quarks. 2-color QCD, which enables numerical simulations on the lattice, constitutes a laboratory to study QCD at high chemical potential. The quark propagator in 2-color QCD at high density is referred to as the Gorkov propagator. We examine the Gorkov propagator and in particular, find the form factors of the...
Kirill Lapidus
(TU Munich)
09/09/2014, 18:10
Section F: Nuclear and Astroparticle Physics
High-precision data on neutral kaon production collected by the HADES collaboration in proton-niobium collisions at a beam energy of 3.5 GeV were analysed with the aim to extract the kaon in-medium potential. Predictions of the Chiral Perturbation Theory (ChPT) for the kaon in-medium properties were tested by means of GiBUU transport model simulations. The uncertainties of the model were...
Prof.
Reinhard Schumacher
(Carnegie Mellon University)
09/09/2014, 18:20
Section B: Light Quarks
An overview of a decade of elementary strangeness production results
from CLAS at Jefferson Lab will be presented. Photoproduction off the
proton of the ground state $\Lambda$ and $\Sigma^0$ states and kaons
has been instrumental in identifying the $N^*$ resonance structure of
the nucleon around 2 GeV. Spin observables, aiming at ``complete''
determination of the photoproduction...
Shahnoosh Rafibakhsh
(Department of Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran)
09/09/2014, 18:50
Abelian gauge fixing procedure is used to create the $SU(4)$ magnetic
monopoles in the vicinity of the points where the gluon filed becomes
singular. The matrix of the scalar field is considered as almost
diagonal in the $SU(2)$ and $SU(3)$ subspaces. The gauge transformation
which diagonalizes the hedgehog field, transforms the gluon filed into
two regular and singular parts. The abelian...
Mr
Dmitry Neverov
(Saint Petersburg State University)
09/09/2014, 18:50
Correlations between various observables, e.g. multiplicities of particles produced in pp collisions at the LHC energies within intervals separated in pseudorapidity and azimuth angle, could be a sensitive tool to analyze hadron collisions dynamics and test hadron production models.
In this report we present results of studies of multiplicity correlation coefficient topology for like- and...
Mr
Cristian Gutierrez
(Universidade Estadual Paulista Julio de Mesquita Filho, Instituto de Fisica Teorica , 01156-970, SP, Brasil.)
09/09/2014, 18:50
The Nakanishi perturbative integral representation of the Bethe-Salpeter amplitude in
three-dimensions (2+1) is investigated in order to derive a workable framework for bound states, which is solution of the homogeneous Bethe-Salpeter Equation (BSE) in Minkowski space. The projection onto the null-plane of the three-dimensional homogeneous BSE is used to derive an equation for the Nakanishi...
Dr
Sedigheh Deldar
(University of Tehran)
09/09/2014, 18:50
We study the relation between the flux of a center vortex obtained from the vortex model and the flux formed between monopoles obtained from the Abelian gauge fixing method.
Motivated by the Monte Carlo simulations which have
shown that almost all monopoles are sitting on the top of vortices, we combine differnet fluxes of monopoles and obtain the flux of center vortices for SU(2)
and...
Farid Taghinavaz
(Department of Physics, Sharif University of Technology)
09/09/2014, 18:50
The shear viscosity of a hot and dense Yukawa-Fermi
gas will be determined, using the standard Green-Kubo relation, according to which the
shear viscosity is given by the retarded correlator of the traceless
part of viscous energy-momentum tensor. We approximate this retarded
correlator using a one-loop skeleton expansion, and express the
bosonic and fermionic shear viscosities,...
Mr
Rajan Dogra
(Government Industrial Training Institute for Women, Sector 11, Chandigarh, India)
09/09/2014, 18:50
Due to the non-linearity involved in quantum chromodynamics (QCD), the required uncertainty in position of a transverse hard gluon, emitted in 3-jet event, is accommodated by allowing for the possibility that Gribov copies are created as virtual entities by quantum fluctuations of the transverse gluon energy over the brief intervals of time during which the special relativity theory and the...
Daniel Zablocki
(Uniwersytet Wrocławski)
09/09/2014, 18:50
An important first step in the program of hadronization of chiral quark models is the bosonization in meson
and diquark channels. This procedure is presented at finite temperatures and chemical potentials for the
SU(2) flavor case of the NJL model with special emphasis on the mixing between scalar meson and scalar
diquark modes which occurs in the 2SC color superconducting phase. The...
Jenifer Nebreda Manjon
(Yukawa Institute for Theoretical Physics, Kyoto University)
09/09/2014, 18:50
We study the in-medium corrections to the neutral pion decay into two photons. For the calculation we use in-medium chiral perturbation theory. We take into account both the wave function renormalization and the medium correction to the one-particle irreducible vertex. Since it was previously shown that there are no medium corrections to the vertex up to O(p^5), that is, linear density in the...
Prof.
Stephen Lars Olsen
(Seoul National University)
09/09/2014, 18:50
The 2013 PDG tables lists the JPC=0++ X(3915)wJ/y resonance, seen in BKwJ/y decays and the ggwJ/y fusion process by both the Belle and BaBar experiments, as the cc0', i.e., the cc0(2P) radial excitation of the cc0(1P) charmonium state. I (and others) dispute this assignment for a number of reasons, including its peak mass value, M=3918.4±1.9 MeV, narrow width G=20±5 MeV, and the absence of...
Mr
Nikolay Antonov
(Saint-Petersburg State University)
09/09/2014, 18:50
Inertial-range asymptotic behavior of a vector (e.g., magnetic) field, passively advected by a strongly anisotropic turbulent flow, is studied by means of the field theoretic renormalization group and the operator product expansion. The advecting velocity field is Gaussian, not correlated in time, with the pair correlation function of the form $\propto \delta(t-t') / k_{\bot}^{d-1+\xi}$, where...
Rafael Delgado
(Universidad Complutense de Madrid (UCM))
09/09/2014, 18:50
Recently, a new boson has been discovered at LHC which, so far, fits the properties of the SM Higgs boson. This would make the SM unitary. However, the SM is not the more general low-energy dynamics for the minimal electroweak symmetry breaking sector (EWSBS) with three Goldstone bosons and one light scalar.
By using a more general low energy effective Lagrangian for these four particles...
Prof.
Shoji Hashimoto
(KEK)
09/09/2014, 18:50
The presence of color source may modify the chiral condensate that characterizes the spontaneous breaking of chiral symmetry in the QCD vacuum. Using the overlap-Dirac eigenmodes, we investigate this phenomenon around static color sources representing quark-antiquark and three-quark systems. We show that the chiral condensate is reduced inside the flux-tube that is formed between the color...
Mr
Dimitri Agadjanov
(University of Bonn)
09/09/2014, 18:50
The possibility of imposing partially twisted boundary
conditions is investigated for the scalar sector of lattice QCD.
According to the commonly shared belief, the presence of quark-antiquark annihilation diagrams in the intermediate state generally hinders the use of the partial twisting. Using effective field theory techniques in a finite volume, and studying the scalar sector of QCD...
Sedigheh Deldar
(University of Tehran)
09/09/2014, 18:50
In this research we try to suggest computing the potential between interacting calorons with non-trivial holonomy. Two methods of sum ansatz and caloron-Dirac string interaction may be used to obtain the interacting potential between two calorons. With this potential, one can compute the partition function of the calorons ensemble with non interacting pairs (Interaction exists between calorons...
farid taghinavaz
(sharif university)
09/09/2014, 18:50
Poster Session
We investigated the impact of anomalous chromomagnetic and chromoelectric dipole moments on the top pair production in diffractive events at the LHC. The exclusive diffractive production of top quarks provide clean environment due to having one proton intact. We found that the effect of these corrections is remarkable in $pp \rightarrow p\gamma p \rightarrow pt\bar{t} X$ processes.
Mikhail Malyshev
(Saint-Petersburg State University)
09/09/2014, 18:50
We address the problem of nonperturbative calculations on the light front in quantum field theory regularized by Pauli-Villars method. As a preliminary step we construct light front Hamiltonians in (2+1)-dimensional $\lambda \varphi^4$ model, for the cases without and with spontaneous symmetry breaking. The renormalization of these Hamiltonians in Pauli-Villars regularization is carried out...
Roman Zubov
(Saint Petersburg State University)
09/09/2014, 18:50
We consider numerical solutions to ’t Hooft equation. We find that the spectrum of eigenvalues coincide with that of Airy differential equation. Physically it corresponds to one dimensional Schrödinger equation for a particle in a triangular potential well. We use Fourier transform of ’t Hooft eigenfunctions to get to the coordinate space. The squared eigenfunctions in this space turn out to...
Igor Altsybeev
(St. Petersburg State University (RU))
09/09/2014, 18:50
The reported study is dedicated to the correlations between mean transverse momenta $p_{\rm T}$ of particles in two observation windows in heavy-ion collisions.
Analysis approach of mean $p_{\rm T}$ correlations is described.
Dependence on rapidity and azimuthal acceptance of the windows is studied
using AMPT event generator and toy Monte-Carlo simulations.
Influence of the selection...
Fernando Serna
(Universidade Estadual Paulista)
09/09/2014, 18:50
We have calculated properties of pseudoscalar mesons using contact interaction in the Bethe-Salpeter equation. Contrary to the traditional treatment of the divergent amplitudes, we have implemented a novel approach in order to avoid the standard steps to evaluate divergent integrals which leads to symmetry violation. The basic idea of the novel approach is simples and consists in to assume a...
Dr
Alexander Rothkopf
(Heidelberg University)
09/09/2014, 18:50
Heavy Quarkonium provides a unique opportunity to investigate the physics of the quark-gluon plasma created in relativistic heavy-ion collisions. From the measured suppression patterns in nucleus-nucleus collisions relative to the yields in proton-proton collisions, we ultimately aim at extracting the properties of the bulk matter created in the collision center.
Hence a thorough...
Alexandr Bylinkin
(ITEP Institute for Theoretical and Experimental Physics (RU))
09/09/2014, 18:50
The transverse momentum spectra of hadrons produced in high energy collisions can be decomposed into the two components: the exponential ("thermal") and the power ("hard") ones.
Recently, the H1 Collaboration has discovered that the relative strength of these two components in Deep Inelastic Scattering depends drastically upon the global structure of the event - namely, the exponential...
Prof.
Michael Mueller-Preussker
(Humboldt-Universitaet zu Berlin)
09/09/2014, 18:50
We present the results achieved for a project dealing with
lattice QCD thermodynamics in the presence of two dynamical
quark generations employing the twisted mass discretization
for Wilson-type quarks and an improved gauge action in order
to ensure (automatic) O(a) improvement of lattice artifacts.
We fix the (charged) pseudo-scalar meson mass values at 400 MeV
and around 250 MeV....
Prof.
Vladimir Vereshagin
(St.-Petersburg State University)
09/09/2014, 18:50
I discuss the renormalization of the one-loop 2-leg functions in
multi-component effective scalar theory. It is shown that only a part of
numerous contributions that appear in the general expression for 2-leg
graph can be considered as the true self energy function. This part is
completely fixed by two conventional requirements -- correctness of the
pole position and the wave function...
Dr
Shahnoosh Rafibakhsh
(Department of Physics, Science and Research Branch, Azad University, Tehran, Iran)
09/09/2014, 18:50
The potential between static color sources is calculated in the $SU(3)$ gauge group by introducing a two dimensional vortex flux. To generalize the model, the length of the Wilson loop is equal to $R$ oriented along the $x$ axis, and the vortex flux is considered as a function of $x$ and $y$. The comparison between the generalized model and the original one shows that the intermediate linear...
Andrei Puchkov
(Saint Petersburg State University)
09/09/2014, 18:50
Baryons containing two heavy quarks are treated in the Born-Oppenheimer approximation. Two non-relativistic potential models are proposed, in which the Schrödinger equation admits a separation of variables in prolate and oblate spheroidal coordinates, respectively. In the first model, the potential is equal to the sum of Coulomb potentials of the two heavy quarks, separated from each other by...
Dr
Masayasu Hasegawa
(Joint Institute for Nuclear Research)
09/09/2014, 18:50
University of Kanazawa and Pisa groups have shown a number of studies which support the confinement mechanism due to monopole condensations by the lattice simulations. The close relations between the instanton and chiral symmetry breaking are theoretically explained, moreover, the relations are revealed by numerical simulations. The purpose of our study is to show that the monopoles relate to...
Sangyong Jeon
(McGill University)
10/09/2014, 09:00
Plenary talks
I will review recent progress in characterizing the properties of QGP.
Main focus will be on the much progress achieved in hydrodynamic simulations of the evolution of QGP. The role of not only the shear viscosity but the importance of including the bulk viscosity will be discussed.
Raimond Snellings
(NIKHEF (NL))
10/09/2014, 09:30
Plenary talks
Experimental overview of heavy ions physics: open challenges and future
Antonio Vairo
(Institut fuer Theoretische Physik-Ruprecht-Karls-Universitaet H)
10/09/2014, 10:00
Plenary talks
N/A
Jens Oluf Andersen
10/09/2014, 11:00
Plenary talks
The perturbative series for finite-temperature field theories has very poor convergence
properties and one needs a way to reorganize it.
In this talk, I review two ways of reorganizing the perturbative series for
field theories at finite temperature and chemical potential, namely hard-thermal-loop perturbation theory (HTLpt) and dimensional reduction (DR).
I will present results for the...
Nora Brambilla
(TU Muenchen,Germany)
10/09/2014, 12:15
QCD and Strongly Coupled Gauge Theories: Challenges and Perspectives,
http://arxiv.org/abs/arXiv:1404.3723
Volker Crede
(Florida State University)
11/09/2014, 09:00
Plenary talks
The spectrum of excited hadrons - mesons and baryons - serves as an excellent probe of Quantum Chromodynamics (QCD), the fundamental theory of the strong interaction. The strong coupling however makes QCD very challenging. It confines quarks and breaks chiral symmetry, thus providing us with the world of light hadrons. Highly-excited hadronic states are sensitive to the details of quark...
Gastao Krein
(UNESP)
11/09/2014, 10:00
Plenary talks
I review the present status in the theoretical and phenomenological
understanding of hadron properties in strongly interacting matter.
I will start considering electromagnetic nucleon form factors and
light vector meson spectral properties in cold nuclear matter. Next,
I will concentrate on in-medium properties of heavy flavored hadrons,
with emphasis on the formation of charmonium...
Prof.
Thomas Luu
(Forschungszentrum Juelich, Universitaet Bonn)
11/09/2014, 11:00
Plenary talks
I review the present status of few-body nuclear and hyper-nuclear calculations from lattice QCD, highlighting the challenges that have been overcome both theoretically and algorithmically within the past few years. I describe the current issues related to this field and conclude by discussing calculations that are anticipated in the near future and their potential impact on other physics disciplines.
Yoshimasa Hidaka
(RIKEN)
11/09/2014, 11:30
Plenary talks
The theory of spontaneous symmetry breaking and Nambu-Goldstone modes (bosons) was developed in 1960’s. When a global symmetry is spontaneously broken, there appears a gapless excitation mode, the Nambu-Goldstone (NG) mode. The theorem is based on Lorentz invariance of the grand state, and it implies that the number of NG modes coincides with the number of broken generators, and they have the...
Michael Creutz
(Brookhaven Lab)
11/09/2014, 12:00
Plenary talks
Topologically non-trivial gauge field configurations are an interesting aspect of non-abelian gauge theories. These become particularly important upon quantizing the theory, especially through their effect on the pseudo-scalar spectrum. These effects are closely tied to chiral anomalies and the possibility of CP violation in the strong interactions. This talk will review these topics.
Ermanno Vercellin
(Universita e INFN (IT))
11/09/2014, 14:00
Section D: Deconfinement
The LHC heavy-ion physics program aims at investigating the properties of strongly interacting matter in extreme conditions of temperature and energy density where the formation of the Quark Gluon Plasma (QGP) is expected. In high-energy heavy-ion collisions, heavy quarks and quarkonium states are regarded as efficient probes of the properties of the QGP as they are created on a short time...
Prof.
Hideo Suganuma
(Kyoto University)
11/09/2014, 14:00
Section A: Vacuum Structure and Confinement
We investigate the inter-quark potential in the maximally Abelian (MA)
gauge in SU(3) quenched QCD on a fine lattice at beta=6.4 (a=0.058 fm).
Remarkably, we find almost perfect Abelian dominance of the string
tension or the quark confining force on the fine lattice [1].
Thus, the confinement phenomenon in QCD can be well described only with
Abelian variables in the MA gauge.
[1] N....
Kimmo Tuominen
(University of Helsinki)
11/09/2014, 14:00
Section G: Strongly Coupled Theories
Development of minimal walking theories and their properties are briefly reviewed. Recent lattice results relevant for these theories are considered and the applications to dynamical electroweak symmetry breaking and related LHC phenomenology are also discussed.
Massimo Passera
(INFN Padova)
11/09/2014, 14:00
Section E: QCD and New Physics
I will summarize the status of the theoretical prediction for the anomalous magnetic moment of the muon, focusing on its latest developments.
Kirill Lapidus
(Moscow Physical Engineering Institute (MePhl))
11/09/2014, 14:00
Section B: Light Quarks
The study of Baryonic resonances with strangeness content
produced in hadron-hadron collisions is important
not only to understand the production mechanisms and the
structure of the various resonates, but also as fundamental
input for the modelling and understanding of heavy ion collisions.
New analysis techniques have been employes by the HADES collaboration
to study quantitatively the...
Huasheng Shao
(Peking University (CN))
11/09/2014, 14:25
Section C: Heavy Quarks
The necessecity of the color-octet mechanism in describing heavy quarkonium production is a longstanding puzzle. Compared to the yields of heavy quarkonium, its polarizations should be more sensitive to the color-octet contributions. In this talk, I will focus on the chi_c polarization in hadroproduction processes, which may provide a unique test for the color-octet mechanism in nonrelativistic QCD.
Mr
Joshua Magee
(College of William and Mary)
11/09/2014, 14:26
Section E: QCD and New Physics
The Q-weak experiment completed data taking at Jefferson Laboratory in 2012, with the aim of making the first experimental determination of the proton's weak charge, $Q_W^p$, which is the neutral-weak analogue of the proton's electric charge. The experiment measured the small parity-violating asymmetry in elastic electron-proton scattering at forward angles and low momentum-transfer...
Dr
Alexander Rothkopf
(Institute for Theoretical Physics, Heidelberg University, Heidelberg, Germany)
11/09/2014, 14:30
Section D: Deconfinement
We present the results of a recent study on the in-medium modification of the spectral properties of Bottomonium S-wave (\Upsilon) and P-wave (\chi_b1) states. The light degrees of freedom of the surrounding medium are represented by 48^3x12 HotQCD lattices with Nf=2+1 HISQ flavors, which span the temperature range 140.40(MeV)(= 0.911T_C) < T < 248.63(MeV)(= 1.614T_C). The heavy quarks on the...
Takahiro Doi
(Kyoto University)
11/09/2014, 14:30
Section A: Vacuum Structure and Confinement
In the lattice QCD formalism, we analytically derive a relation between the Polyakov loop and Dirac modes on the lattice where the temporal size is odd and link-variables are temporally periodic. The Polyakov loop is an order parameter for quark confinement and low-lying Dirac modes are essential for chiral symmetry breaking. Remarkably, from the relation, we find that low-lying Dirac modes...
Florian Haas
(Technische Universitaet Muenchen (DE))
11/09/2014, 14:30
Section B: Light Quarks
COMPASS is a multi-purpose fixed-target experiment at the CERN Super Proton Synchrotron aimed at studying the structure and spectrum of hadrons. One main goal is the search for new hadronic states, in particular hybrid mesons and glueballs. Its large acceptance, high resolution, and high-rate capability make the COMPASS experiment an excellent device to study the spectrum of light-quark mesons...
Dr
Marc Gillioz
(CP3-Origins)
11/09/2014, 14:30
Section G: Strongly Coupled Theories
The conformal symmetry plays an important role in quantum field theories, even when it is explicitly broken by a renormalization group flow. The Weyl consistency conditions reflect its presence in the renormalized theory. They provide relations among the beta functions at different loop orders, with a broad range of applications, from the determination of the vacuum stability in the Standard...
Mr
Maxim Nefedov
(Samara State University)
11/09/2014, 14:50
Section C: Heavy Quarks
The hadroproduction of D^0, D^*, D^+ and D_s mesons is calculated in the LO of Parton Reggeization Approach, using the KMR[1] set of unintegrated PDFs of the proton to take into account the factorisable effects of initial-state radiation, and the set of fragmentation functions [2].
The obtained accuracy of the description of the recent Tevatron (sqrt(S)=1960 GeV) and LHC (sqrt(S)=1960 GeV)...
Dmitry Ryabchikov
(Institute for High Energy Physics)
11/09/2014, 15:00
Section B: Light Quarks
The COMPASS experiment, at CERN SPS, has collected the worlds largest statistics
of the reaction pi- p -> pi- pi- pi+ p - more than 5*10^7 events.
The amount and also the quality of this data sample allows for detailed
studies of 3pi partial-wave amplitudes behaviour in 2 dimentions: invariant mass m(3pi) and four momentum transfer t'.
The method of traditional mass-independent PWA...
Giacomo Cacciapaglia
(IPN Lyon)
11/09/2014, 15:00
Section G: Strongly Coupled Theories
The discovered Higgs boson has properties similar to the ones expected from the standard model, however the possibility that it may be a state composite of fundamental fermions is not excluded. It may in fact be either a heavy resonance of the dynamics, or a light pseudo-Goldstone boson. In truth, the two cases are limits of a more general scenario. I will review the state of the art of the...
Marzia Nardi
(INFN)
11/09/2014, 15:00
Section D: Deconfinement
I will present recent results on heavy-quark quenching, elliptic flow and azimuthal correlations in proton-proton and nucleus-nucleus collisions at LHC energies.
We simulate the c-cbar and b-bbar pair initial creation with a perturbative QCD approach (POWHEG+PYTHIA).
Successively we study the propagation of the heavy quarks in the plasma with the relativistic Langevin equation, by using...
Dr
Alexander Molochkov
(Far Eastern Federal University)
11/09/2014, 15:00
Section A: Vacuum Structure and Confinement
The most important probes for the phase states of a four-dimensional gauge field theory are the Wilson and t'Hooft line operators that are defined on one-dimensional curves in the space-time. However, for more detail understanding of four-dimensional gauge field theory dynamics and vacuum topology we need additional probes expressed by operators defined on the subspaces with higher dimensions....
Jordy de Vries
(Jülich Forschungszentrum)
11/09/2014, 15:18
Electric dipole moments (EDMs) break parity and time-reversal (T) symmetry and, by the CPT-theorem, CP-symmetry. If measured they are unambigious signs of new physics, since CP-violation in the quark mixing matrix predict EDMs orders of magnitude away from current experimental limits. The SM also contains the QCD vacuum angle (the theta term) whose value is unknown but strongly limited by...
Prof.
Leonid Glozman
(University of Graz)
11/09/2014, 15:30
Section A: Vacuum Structure and Confinement
Mesons constructed from the quark propagators without the lowest-lying eigenmodes of the Dirac operator reveal not only restored chiral and U(1)_A symmetries, but actually a higher symmetry. All possible
chiral and U(1)_A multiplets for the states of the same spin are degenerate, i.e. the energy of the
observed quantum levels does not depend on the spin orientation of quarks and their...
Miguel Angel Escobedo Espinosa
(Technische Universitaet Muenchen)
11/09/2014, 15:30
Section D: Deconfinement
The dissociation of heavy quarkonium seen in heavy-ion collisions is a phenomena that allows to extract information of the produced thermal medium. This was believed to be due to the screening of the static potential, but recently perturbative computations and some lattice studies have pointed out to the possibility of having an imaginary part of the potential that would also contribute to...
Rafael Delgado
(Universidad Complutense de Madrid (UCM))
11/09/2014, 15:30
Section G: Strongly Coupled Theories
The apparent finding of a 125-GeV light Higgs boson closes unitarity of the minimal Standard Model (SM), that is weakly interacting. This is an exceptional feature not generally true if new physics exists beyond the mass gap found at the LHC up to 700 GeV.
Such new physics induces departures of the low-energy dynamics for the minimal electroweak symmetry-breaking sector (EWSBS), with three...
Dr
Bitan Roy
(CMTC, University of Maryland)
11/09/2014, 16:30
Section A, Focus Subsection
Monolayer graphene in a strong magnetic field exhibits quantum Hall states at filling fractions $\nu = 0$ and $\nu = \pm 1$ that are not explained within a picture of non-interacting electrons. In this talk I will argue that these states possibly arise from interaction induced chiral symmetry breaking orders on the honeycomb lattice, such as Neel antiferromagnetism and charge-density-wave...
Thomas Peitzmann
(University of Utrecht (NL))
11/09/2014, 16:30
Section D: Deconfinement
Direct photons have always been considered a promising probe for the very early phases of high-energy nuclear collisions. Prompt photons reveal information about the initial state and its possible modifications in nuclei. In this context they should be one of the best probes for effects of gluon saturation. Thermal photons emitted from the produced matter in nuclear collisions carry...
Emilie Passemar
(Indiana University/JLab)
11/09/2014, 16:30
Section B: Light Quarks
In this talk, we review the recent theoretical progress towards a precise determination of some hadronic observables such as the Kpi and pipi form factors. We show that significant improvement can be achieved by combining dispersive techniques with chiral perturbation theory calculations, lattice results and experimental measurements. We will then present two applications for precise tests of...
Thomas Ryttov
(CP3 - Origins)
11/09/2014, 16:30
Section G: Strongly Coupled Theories
In the past decade many advances have been made in the attempt to uncover the phase diagram of nonsupersymmetric strongly coupled gauge theories. Progress has come from both analytic computations and analysis as well as lattice simulations. In this talk I will present the most recent calculations and estimates of the phase boundary of the conformal window performed using higher order...
Prof.
Ronald Horgan
(DAMTP, University of Cambridge)
11/09/2014, 16:30
Section C: Heavy Quarks
I report on progress by the HPQCD Collaboration using radiatively-improved lattice NonRelativistic QCD on ensembles of gluon field configurations that now include u, d, s and c quarks in the sea with the u/d quark mass going down to its physical value. I describe the background field approach for determining the one-loop radiative improvement to coefficients in the NRQCD action, and I present...
David Blaschke
(University of Wroclaw)
11/09/2014, 16:30
Section F: Nuclear and Astroparticle Physics
We aim at clarifying three of the fundamental puzzles related to the still unsolved problem of the structure of the dense core of compact stars (CS): (i) hyperon puzzle: how to reconcile pulsar masses of 2M$_\odot$ with the hyperon softening of the equation of state (EoS); (ii) masquerade problem: modern EoS for cold, high density hadronic and quark matter are almost identical; and (iii)...
David Edwin Alvarez Castillo
(JINR)
11/09/2014, 16:50
Section F: Nuclear and Astroparticle Physics
In order to prove the existence of a critical end point (CEP) in the
QCD phase diagram it is sufficient to demonstrate that at zero
temperature $T=0$ a first order phase transition exists as a function
of the baryochemical potential $\mu$, since it is established
knowledge from ab-initio lattice QCD simulations that at $\mu=0$ the
transition on the temperature axis is a crossover.
We...
Taichi Kawanai
(RIKEN)
11/09/2014, 16:55
Section C: Heavy Quarks
We present quark-antiquark potentials for the charmonium, that are calculated using a relativistic heavy quark action for charm quarks and PACS-CS Iwasaki gauge configurations with 2 + 1 flavors of dynamical clover light quarks. The light quark masses are almost physical (pion mass ~ 156(7) MeV). The interquark potential with finite quark masses are defined through the equal-time...
Vincent Mathieu
(Indiana university)
11/09/2014, 17:00
Section B: Light Quarks
I give an overview of the Jefferson Lab Physics Analysis Center (JPAC) activities.
JPAC is a join center between Indiana University and the Jefferson Laboratory.
We provide theoretical tools for data analysis in hadron spectroscopy.
In this talk, I will present the following topics:
- Dalitz plot analysis of eta-> 3pi and omega-> 3pi
- omega -> pi gamma transition form factor
-...
Andrey Sadofyev
(MIT)
11/09/2014, 17:00
Section A: Vacuum Structure and Confinement
We consider chiral liquids,consisting of massless fermions and right-left asymmetric.In such media, one expects existence of new transports in equilibrium. Among them electric current flowing along external magnetic field which is predicted to be dissipation free. We argue that actually the chiral liquids in the hydrodynamic approximation should satisfy further constraints, like infinite...
Aleksi Vuorinen
(University of Bielefeld)
11/09/2014, 17:00
Section D: Deconfinement
I will describe recent efforts to take holographic studies of the thermalization process of heavy ion collisions away from the limits of infinite 't Hooft coupling and the Vaidya spacetime, corresponding to lightlike gravitational collapse. In particular, I will demonstrate, how classic results such as quasinormal mode spectra, the top-down pattern of thermalization and the rate of entropy...
Dr
Matti Järvinen
(University of Crete)
11/09/2014, 17:00
Section G: Strongly Coupled Theories
I will start by a generic review of holography and its application to QCD, including the top-down and bottom-up approaches. I will go on discussing some of the latest developments in the construction of holographic models for QCD, concentrating on the bottom-up ones. I will cover improved holographic QCD, which is a string-theory inspired model for the Yang-Mills theory. Finally I will discuss...
Stefan Schramm
(Goethe University)
11/09/2014, 17:10
Section F: Nuclear and Astroparticle Physics
Phenomenological approaches to Quantum Chromodynamics covering the region from low to high temperature and/or density have to address the problem that the effective degrees of freedom change drastically from hadrons to quarks and gluons.
We study this situation with a unified description of hadronic and quark matter allowing for cross-over as well as first or second-order phase transitions....
Rudolf Faustov
(RAS)
11/09/2014, 17:15
Section C: Heavy Quarks
The branching fractions of the semileptonic and rare $B_s$ decays are calculated in the
framework of the QCD-motivated relativistic quark model. The form factors of the weak $B_s$ transitions are expressed through the overlap integrals of the initial and final meson wave functions in the whole accessible kinematical range. The momentum
transfer dependence of the form factors is explicitly...
Prof.
Alexander Gorsky
(IPPI)
11/09/2014, 17:30
Section A: Vacuum Structure and Confinement
The generalized Skyrme model for the baryon motivated by the holography is formulated.
It involves the whole tower of vector and axial mesons as well as the chiral symmetry breaking. The origin of the Ioffe,s formula for the baryon mass is clarified.
Dr
Alexander Nesterenko
(Joint Institute for Nuclear Research)
11/09/2014, 17:30
Section B: Light Quarks
The dispersive approach to QCD, which extends the applicability
range of perturbation theory towards the infrared domain, is
developed. This approach properly accounts for the intrinsically
nonperturbative constraints, which originate in the low-energy
kinematic restrictions on pertinent strong interaction processes.
The dispersive approach proves to be capable of describing
recently...
Simon Caron-Huot
(Niels Bohr Insitute)
11/09/2014, 17:30
Section D: Deconfinement
I will discuss the use of the Pomeron as a theoretical tool to describe the interactions between a high-energy jet and an underlying quark-gluon plasma. By varying the intercept and other properties of the Pomeron, I will argue that one obtains a robust class of models which interpolate and unify the phenomenology of weak-coupling (perturbative QCD) and strong-coupling (holographic) models.
Esben Mølgaard
(University of Southern Denmark)
11/09/2014, 17:30
Section G: Strongly Coupled Theories
Fixed points in gauge theories with fermions have been studied for a long time, and their presence or absence has been mapped out quite thoroughly in the so-called conformal window. However, by adding scalar particles to the theory, many more things can happen as the Yukawa and quartic interactions greatly influence the running of the couplings. We will discuss the structure of fixed points in...
Dmitri Melikhov
(SINP, M.V.Lomonosov Moscow State University)
11/09/2014, 17:35
Section C: Heavy Quarks
We present the analysis of the decay constants of charmed and beauty heavy mesons using QCD sum rules. We show that the perturbative expansion in terms of the pole mass of the heavy quark exhibits no sign of convergence whereas reorganizing this expansion in terms of the running mass leads to a distinct hierarchy. Making use of the OPE in terms of the running mass, we determine the decay...
Alessandro Drago
(University of Ferrara)
11/09/2014, 17:50
Section F: Nuclear and Astroparticle Physics
I will show that Delta resonances are easily produced in compact stars when the asymmetry energy is taken into account by using the correct value of its density derivative at saturation (the parameter called L). The Delta production has crucial implications on the maximum mass of the compact stars and on their radius.
Prof.
Vladimir Petrov
(IHEP)
11/09/2014, 17:50
Section B: Light Quarks
Formulation of confinement is discussed in the framework of general principles of q.f.t.
Characteristic space-time scales which define the bulk of high-energy hadron scattering
are derived.
Prof.
Francisco Fernandez
(Universidad de Salamanca)
11/09/2014, 17:55
Section C: Heavy Quarks
The hadronic transitions of heavy quarkonia such as $\psi
(nS)$ or $\Upsilon(nS)$ to lower states with emission of two pions are important tools for
understanding both, the heavy quarkonium dynamics and the formation of light hadrons.
The typical momentum involve in the transition is too low for perturbative QCD and then perturbative method does not apply.
The recent experimental data...
elsen veli
(kocaeli universty)
11/09/2014, 18:00
Section D: Deconfinement
tensor mesons, thermal qcd sum rules
Mr
Aleksei Ivanov
(SPBSPU & PNPI)
11/09/2014, 18:10
Section F: Nuclear and Astroparticle Physics
Hadron and lepton production in hard interaction of high-energy particles with nuclei are considered in context of developing of Monte Carlo generator HARDPING (Hard Probe Interaction Generator). Such effects as energy losses and multiple re-scattering initial and produced hadrons and their constituents are taken into account. These effects are implemented in the current version of generator...
Dr
Robert Kaminski
(Institute of Nuclear Physics PAN, Krakow, Poland)
11/09/2014, 18:10
Section B: Light Quarks
Recently reparameterized $f_0(500)$ (former $\sigma$) meson became subject of a number of innovative works in QCD physics.
Difficult to find and to determine experimentally after many years of failures has been finally precisely described be means of theoretical dispersion relations with imposed crossing symmetry condition [1,2].
Its fundamental importance for low energy QCD opened up the...
Prof.
Boris Ioffe
(Institute for Theoretical and Experimental Physics (ITEP))
11/09/2014, 22:30
Plenary talks
The After-dinner talk.
Vitaly Bornyakov
(Institute for High Energy Physics)
12/09/2014, 09:00
Plenary talks
I present an overview of the lattice studies of the confinement problem. I will concentrate on the dual superconductor scenario of confinement and on the center vortex theory of confinement. The talk is devoted to the memory of Misha Polikarpov who passed away one year ago. Misha was certainly one of the major figures in the lattice studies of the confinement problem. In my talk I will ...
Prof.
Alexander Gorsky
(IPPI)
12/09/2014, 09:30
Plenary talks
QCD and strongly coupled models versus holography and strings: news and
highlights
Sergey Afonin
(Saint Petersburg State University)
12/09/2014, 10:00
Plenary talks
The phenomenological five-dimensional holographic models represent a interesting and unexpectedly fruitful theoretical laboratory for studying the strongly coupled QCD.
We present a short review of these models and of various results concerning the hadron spectrum, chiral symmetry breaking and the deconfinement temperature.
Simon Caron-Huot
(Niels Bohr Institute)
12/09/2014, 11:00
Plenary talks
When does the gluon reggeize
Jose Goity
(Department of Physics, Hampton University, Hampton, USA)
12/09/2014, 11:30
Plenary talks
N/A
Adi Armoni
(Swansea university),
Erich Poppitz,
Gunnar Bali
(Universität Regensburg),
Jose Luis Goity
(Hampton University/Jefferson Lab)
12/09/2014, 12:00
Mr
Tomas Husek
(Charles University (CZ))
12/09/2014, 14:00
Section B: Light Quarks
In this talk we will discuss two important processes of the low energy hadron physics: the Dalitz decay of $\pi^0$ and $\pi^0\to e^+e^-$.
We briefly summarize experimental and theoretical results on the rare decay $\pi^0\to e^+e^-$. The analytical two-loop QED corrections together with the bremsstrahlung contribution beyond the soft-photon approximation are reviewed. Using the leading...
Tatiana Drozhzhova
(Saint-PetersburgState University)
12/09/2014, 14:00
Section D: Deconfinement
We present the critical review of estimates of centrality in AA and pA collisions that are usually done by selection of classes of events with certain charged particles multiplicity. Results of MC simulations in different models are presented. They include the Standard Glauber, the Modified Glauber model [1] and HIJING[2] event generator (with gluon shadowing) MC calculations. We...
Oleg Antipin
(INFN, Florence)
12/09/2014, 14:00
We study properties of composite operators emerging in nonsupersymmetric, four-dimensional gauge-Yukawa theories with interacting conformal fixed points. The theories investigated are structurally similar to the standard model of particle interactions, but differ from the standard model by developing perturbative interacting fixed points. We investigate the physical properties of the singlet...
Dr
Ernst-Michael Ilgenfritz
(JINR Dubna, VBLHEP and BLTP)
12/09/2014, 14:00
Section A: Vacuum Structure and Confinement
The topological structure of $SU(3)$ gluodynamics close to the infrared scale
is studied near to the transition temperature with the help of zero and
near-zero modes of the overlap Dirac operator. The associated UV filtered
topological charge density is considered for antiperiodic and two other
thermal boundary conditions. In this way three types of localized topological
clusters can be...
Antonio Pineda
(Universitat Autonoma de Barcelona)
12/09/2014, 14:19
Section C: Heavy Quarks
We compute the magnetic dipole transitions between low lying Heavy Quarkonium states in a model independent way. We use the weak-coupling version of the effective field theory named potential NRQCD with the static potential exactly incorporated in the leading order Hamiltonian. The convergence for the b-\bar b ground state is quite good, and also quite reasonable for the c-\bar c ground state...
Dr
Richard Williams
(University of Giessen)
12/09/2014, 14:20
Section B: Light Quarks
We present a calculation of the Hadron spectrum in the Dyson-Schwinger/Bethe-Salpeter
approach to continuum QCD. A sophisticated truncation featuring all covariant structures
of the quark-gluon vertex, with its inherent flavour dependence, is employed in a framework
that preserves the dynamics of chiral symmetry breaking. The study is suggestive as to the
relevance of additional resonant...
Evgeny Andronov
(St. Petersburg State University (RU))
12/09/2014, 14:20
Section D: Deconfinement
The long-range rapidity correlations between the multiplicities (n-n) and the transverse momentum and the multiplicity (pT-n) of charge particles are analyzed in the framework of the simple string inspired model with two types of sources. The sources of the first type correspond to the initial strings formed in a hadronic collision. The sources of the second type imitate the appearance of the...
Dmitry Kotov
(SPbSPU)
12/09/2014, 14:20
Section D: Deconfinement
The flexibility of RHIC to collide different nuclei provides experiments with a rich set of data to systematically test models and scaling behaviors in various collision systems. In 2012 RHIC collided Cu+Au nuclei. These collisions promise an array of unique initial geometrical configurations. Such geometries present an opportunity to measure the wide range of initial energy densities of this...
Randy Lewis
(York University)
12/09/2014, 14:30
Section G: Strongly Coupled Theories
An overview of recent lattice computations for dark matter will be presented.
Ivan Horvath
(University of Kentucky)
12/09/2014, 14:30
Section A: Vacuum Structure and Confinement
Dynamical polarization methods offer a novel way to characterize vacuum correlations of strong interactions in a model-independent manner. Selected aspects of this description are discussed with applications both for confinement and spontaneous chiral symmetry breaking.
Mikhail Malaev
(B.P. Konstantinov Petersburg Nuclear Physics Institute - PNPI ()
12/09/2014, 14:40
Section D: Deconfinement
Hadronic resonances are among the most interesting probes of the hot and dense matter created in Pb--Pb collisions. Due to their short lifetime, they are sensitive to the anticipated chiral symmetry restoration as well as to suppression and regeneration due to hadronic interactions in the final state. At intermediate and high transverse momenta ($p_{\mathrm T}$) resonances which cover the...
Michael Benzke
(TUM)
12/09/2014, 14:40
Section D: Deconfinement
The effect of jet broadening and the related jet quenching parameter \hat{q} are important in the description of energy loss of a jet moving through a medium. This effect has been calculated perturbatively up to NLO. In this talk I will show that in order to compute the NNLO result one needs to consider contributions from transverse momenta of order πT , gT and g^2T and that in the region gT a...
Mr
Walter Heupel
(Justus-Liebeig University Giessen)
12/09/2014, 14:40
Section B: Light Quarks
In the framework of Dyson-Schwinger equations, we present the first calculation of a four-body Bethe-Salpeter equation as required for the covariant description of tetraquarks. In a first approach we focus on the lightest tetraquark candidate, the $f_0(500)$, with an aim to determine the complete scalar nonet. Further investigations in this approach will focus on tetraquarks in the vector...
Mr
Hector Martinez
(TU Munich)
12/09/2014, 14:43
Section C: Heavy Quarks
We use the complete expression for the $\mathcal{O}(1/m^2)$ corrections to the quark-antiquark potential derived from QCD in terms of Wilson loop expectation values, and a mapping, valid at large distances, between those Wilson loop expectation values and correlators evaluated in the effective string theory (EST), to compute all $\mathcal{O}(1/m^2)$ potentials at large distances. In...
Prof.
Adriano Natale
(UFABC/IFT-Unesp)
12/09/2014, 15:00
Section G: Strongly Coupled Theories
[Chiral transition of fundamental and adjoint quarks, published in Phys.Lett.B728, 626 (2014)][1]
[1]: http://www.sciencedirect.com/science/article/pii/S0370269313010174#
The chiral symmetry breaking transition of quarks in the fundamental and adjoint representation is
studied in a model where the gap equation contains two contributions, one containing a confining
propagator and...
Matthias Berwein
(TU Munich)
12/09/2014, 15:00
Section D: Deconfinement
I will discuss how Wilson line operators can be exponentiated, and how this exponentiation helps in studying their renormalization properties. Explicit examples will include rectangular Wilson loops, the cyclic Wilson loop and the Polyakov loop correlator. Relations to the Polyakov loop correlator's spectral decomposition will also be discussed.
Based on arXiv:1312.6651 [hep-th]
Manfried Faber
(VUT)
12/09/2014, 15:00
Section A: Vacuum Structure and Confinement
We analyze the creation of near-zero modes from would-be zero modes of various topological charge contributions from classical center vortices in SU(2) lattice gauge theory. We show that colorful spherical vortex and instanton configurations have very similar Dirac eigenmodes and also vortex intersections are able to give rise to a finite density of near-zero modes, leading to chiral symmetry...
Jenifer Nebreda Manjon
(YITP, Kyoto University)
12/09/2014, 15:00
Section B: Light Quarks
Our results on obtaining the Regge trajectory of a resonance from its pole in a
scattering process and from analytic constraints in the complex angular momentum plane will be presented. The method, suited for resonances that dominate an elastic
scattering amplitude, has been applied to the rho(770), f_2(1275), f_2´(1525) and the f0(500) resonances.
Whereas for the first three we obtain...
Vladimir Vechernin
(St. Petersburg State University (RU))
12/09/2014, 15:00
Section D: Deconfinement
The approach relies on a microscopic treatment of cumulative phenomena based on perturbative QCD calculations of the corresponding quark diagrams near the thresholds [1]. This enables to find the asymptotic behavior of the structure functions of nuclear fluctons – the dense drops of nuclear matter in nuclei composed of a few nucleons. As a result, in the framework of the approach the nuclear...
Mr
Sungmin Hwang
(Technical University of Munich)
12/09/2014, 15:02
Section C: Heavy Quarks
Potential non-relativistic QCD (pNRQCD) is an effective field theory that describes heavy quarkonia at the ultrasoft scale, i.e. at the scale of the binding energy. As a non-relativistic theory, full Poincaré invariance is no longer explicit in pNRQCD. However, since pNRQCD is ultimately derived from QCD, Poincaré invariance is still hidden in the theory, with the effect that the Wilson...
Mr
Sergi Gonzàlez-Solís
(IFAE-U.A.Barcelona)
12/09/2014, 15:20
Section B: Light Quarks
We illustrate how the $K^\star(1410)$ resonance parameters can be extracted with improved precision by exploiting the synergy of a combined study of the
$\tau^-\to (K\pi)^-\nu_\tau$ and $\tau^-\to K^-\eta\nu_\tau$ decays for the first time. On the one hand we take advantage of the much larger statistics
accumulated for the former decay in the $K_S\pi^-$ channel, while on the other we also...
Alexandr Bylinkin
(ITEP Institute for Theoretical and Experimental Physics (RU))
12/09/2014, 15:20
Section D: Deconfinement
The dependence of the spectral shape of produced charged hadrons on the size of a colliding system is discussed using a two-component model. As a result, the system-size hierarchy in spectral shape is observed. Next, a hydrodynamic extension of a two-component model for hadroproduction using recent theoretical calculations is suggested to describe the spectra of charged particles produced in...
Dr
Eigo Shintani
(Mainz)
12/09/2014, 15:20
Section G: Strongly Coupled Theories
We present our investigation of a symmetry on honeycomb lattice. Using the formulation developed recenetly by analogy of staggered fermion formulation, we show the explicit formulation of "hidden" chiral symmetry on honeycomb lattice. We also discuss the possible extension of this formulation to interacting system as an application to Graphene.
Prof.
Pedro Gonzalez
(Universitat de Valencia)
12/09/2014, 15:21
Section C: Heavy Quarks
From lattice results a new non relativistic quark model to calculate the spectrum of heavy quark mesons has been developed. Te model interaction is generated from the identification of E(r), the energy of two static color sources, Q and antiQ, in terms of the Q-antiQ distance, calculated in the lattice, with the sum of the masses of the Quark (m_{Q}) and the antiQuark (m_{antiQ}) plus the...
Dr
Roman Höllwieser
(NMSU/VUT)
12/09/2014, 15:30
Section A: Vacuum Structure and Confinement
A promising picture of confinement in QCD is based on a condensate of thick vortices with fluxes in the center of the gauge group (center vortices). A number of studies of this picture have been made and specific models have been formulated to obtain a concrete realization of the vortex picture. In our model,
vortices are represented by closed random lines in 2+1- dimensional space-time....
Dr
Grigory Feofilov
(Saint-Petersburg State University)
12/09/2014, 15:30
Section D: Deconfinement
Some sudden change in two-dimensional two-particle angular correlations (i.e. the onset of a so-called near-side «ridge» structure, localized in azimuth and extended in pseudorapidity) was observed by STAR collaboration at RHIC in AuAu collisions at 62 and 200 GeV [1]. It was shown for the first time that this change occurs at a specific Au-Au centrality, common to both energies. These...
Vicent Mateu
(University of Vienna)
12/09/2014, 15:40
Section B: Light Quarks
For the e+e- C-parameter we use soft-collinear effective theory to derive a factorization theorem, and then compute the cross section at N3LL + O(alphas^3). Differences with Thrust are highlighted. Our result holds for C in the peak, tail, and far tail regions, and we treat hadronization effects using a universal nonperturbative soft function defined in field theory. We analyze all available...
Sumit Basu
(Department of Atomic Energy (IN))
12/09/2014, 15:40
Section D: Deconfinement
Heavy-ion collisions at relativistic energies, which are accessible at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC), are often
referred to as little bangs. Experiments at these energies probe the conditions which prevail at freeze-out, and often it is not possible to define the correct equation-of-state (EoS) and the conditions at the initial stages of the...
Ilya Pusenkov
(SPbSU)
12/09/2014, 15:40
Section C: Heavy Quarks
The spectrum of radially excited unflavored vector mesons is relatively well measured, especially in the heavy-quark sector. This provides a unique opportunity to observe the behavior of the hadron spectrum at fixed quantum numbers as a function of the quark mass. The experimental data suggests the approximately Regge form for the radial spectrum, $M_n^2 = An+B$, where A and B are growing...
Dr
Elmar P. Biernat
(Centro de Fisica Teorica de Particulas (CFTP), Instituto Superior Tecnico, Universidade de Lisboa)
12/09/2014, 16:20
Section B: Light Quarks
We propose a model for the quark-antiquark interaction in the framework of the Covariant Spectator Theory (CST). Our interaction kernel in momentum space is the sum of a delta-function potential and a covariant generalization of the linear confining interaction. With a pure vector Lorentz structure for the delta-function and a mixed scalar-pseudoscalar structure for the confining part, the...
Dr
Anatoly Kotikov
(JINR)
12/09/2014, 16:20
Section B: Light Quarks
We present a new approach to consider and include both the perturbative and the non-perturbative contributions to the multiplicities of gluon and quark jets. Thanks to this new method, we have included for the first time new contributions to these quantities obtaining next-to-next-to-leading-logarithmic resummed formulas. Our analytic expressions depend on two non-perturbative parameters with...
Umut Gursoy
(University of Utrecht (NL))
12/09/2014, 16:20
Section A: Vacuum Structure and Confinement
The hot QCD matter produced in any heavy ion collision with a nonzero impact parameter is produced within a strong magnetic field. We study the imprint that these fields leave on the azimuthal distributions and correlations of the produced charged hadrons. The magnetic field is time-dependent and the medium is expanding, which leads to the induction of charged currents due to the combination...
Roman Zubov
(Saint Petersburg State University)
12/09/2014, 16:40
Section B: Light Quarks
We consider a transition to the light front Hamiltonian from theories quantized on spacelike planes approaching to the light front. In this approach we preserve the dynamics of zero mode present in the theories near the light front. We make the limit transition differently for zero and nonzero modes. This leads to the appearance of some phenomenological parameter which can be used to describe...
Collaboration CMD-3
(Budker Institute of Nuclear Physics)
12/09/2014, 16:40
Section B: Light Quarks
Regular data taking with the CMD-3 detector at the VEPP-2000 electron-positron collider in Novosibirsk is underway since 2010. The luminosity up to 10**31 cm-2s-1 has been reached at the energy 2E=2 GeV, and another order of magnitude will be achieved after construction of the new positron source.
The already collected physical data sample corresponds to about 60 inversed picobarns of...
Andrey Ustyuzhanin
(ITEP Institute for Theoretical and Experimental Physics (RU))
12/09/2014, 16:50
Section A: Vacuum Structure and Confinement
In this talk we focus on a meta-problem of physics i.e. on problems that arise in collaborative computational research. HEP research is a meaningful and important example. Problems come from different aspects of complexity of research and usually are more generic than research in physics and probably apparent in all computational science domains. A possible solution for such problems is...
Dr
Vladislav Korotkov
(IHEP Protvino)
12/09/2014, 17:00
Section B: Light Quarks
Experiment HERMES at DESY collected a large set of DIS data using the 27.6 GeV polarized
electron/positron beam and various, polarized and unpolarized, gaseous targets.
In this talk an overview of the results obtained in the experiment will be presented.
Dr
Nodoka Yamanaka
(iTHES Research Group, RIKEN)
12/09/2014, 17:00
Section B: Light Quarks
We evaluate the quark scalar, axial and tensor charges of the nucleon in the Schwinger-Dyson formalism.
For the scalar charge, it is found that it is enhanced by the gluon dressing effect, and that it is a sensitive observable to the quark confinement.
For the axial and tensor charges, it is found that the gluon dressing effect suppresses them.
This result can be understood as the...
Dmitri Ryabchikov
(Institute for High Energy Physics (RU))
12/09/2014, 17:20
Section B: Light Quarks
The upgraded VES detector has recently collected the highest
world statistics of the reaction pi- Be -> pi- pi0 pi0 Be
- about 14 000 000 events. This allows us to perform mass
independent partial wave analysis in 10 non-equidistant
intervals of squared momentum transfer t' in the region
0 < t' < 1 GeV^2.
The second stage of the analysis is the model-dependent
fit...
Mr
Tomas Kadavy
(Charles University (CZ))
12/09/2014, 17:20
Section B: Light Quarks
The independent operator basis of the most important resonances in the odd-intrinsic parity sector of QCD allows us to construct Lagrangians for corresponding Feynman diagrams of several types of interaction channels of the mesons and resonances.
In this talk, we will discuss all three-point current correlators non-trivial for this sector. We briefly summarize their basic properties and...
Ahmed Bakry
(Chinese Academy of Sciences-Institute of modern Physics)
12/09/2014, 17:20
Section A: Vacuum Structure and Confinement
We look for the signature of the confining Y-bosonic string in the gluonic profile due to a system of three static quarks on the lattice. The gluonic distribution is calculated in pure Yang-Mills lattice gauge theory at finite temperature with Polyakov loops operators. The analysis of the action density unveils a background of a filled-$\Delta$ distribution. However, we found an underlying...
Dr
Alexandr Polyarush
(INR RAS)
12/09/2014, 17:40
Section B: Light Quarks
The inclusive production of the meson resonances $\rho^{0}(770)$, $f_0(980)$,
$f_2(1270)$, $K^{*+}(892)$ in neutrino-nucleon interactions has been
studied with the NOMAD detector. The detector was exposed to the wide band neutrino beam
generated by 450-GeV protons at CERN SPS. For the first time the $f_{0}(980)$
meson is observed in neutrino interactions. The presence of $f_{2}(1270)$ in...
Raimond Snellings
(NIKHEF (NL))
Section D: Deconfinement
the collective expansion of matter created in collisions of heavy-ions, ranging from collision energies of tens of MeV to a few TeV per nucleon pair, proved to be one of the best probes to study the detailed properties of these unknown states of matter. Collective expansion, also called flow, originates from the initial pressure gradients in the created hot and dense matter. These pressure...
Mr
Johannes Weber
(Technische Universität München)
Section D: Deconfinement
We calculate the correlation function of Polyakov loops and the cyclic Wilson loops in 2+1 flavor QCD at non-zero temperature. In our investigations we use the highly improved staggered quark (HISQ) action and lattices with temporal extent Nt=4,6,8,10 and 12.
At high temperatures we compare our numerical results with perturbation theory.
Qiang Zhao
(Institute of High Energy Physics, Chinese Academy of Sciences)
Section B: Light Quarks
Oral
We demonstrate that the triangle singularity mechanism would account for the creation of the a1(1420) in the invariant mass spectrum of pi- pi- pi+ in the pi- p scattering observed by the COMPASS Collaboration. The same mechanism also accounts for the eta(1405/1475) puzzle since its interference will lead to significant changes to the lineshapes and peak positions for the same state when it...
