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Mr Nils Huesken (WWU Muenster)26/09/2017, 19:00Spectroscopy of mesonsPoster
The production of mesons in proton-deuteron fusion has historically received considerable interest as a natural way to study the interaction between mesons and nuclear matter through final state interactions. Thus, the near threshold regions for the production of $\eta$ and $\pi^0$ mesons in $\text{p}\text{d} \rightarrow {}^3\text{He}X$ are already well explored, yet still subject of active...
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Santiago Cortes (Universidad de los Andes)26/09/2017, 19:00Spectroscopy of mesonsPoster
We analyze here the mass spectrum of light vector and scalar mesons applying the novel approach developed in [1], where a modified soft wall model that includes a UV-cutoff at a finite z-position in the AdS space is used, thus introducing an extra energy scale. For this model, we found that the masses for the scalar and vector spectra are well fitted within $\delta_\text{RMS}=6.88\%$ for these...
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Prof. Yong-Liang Ma (Jilin University)26/09/2017, 19:00Hadrons in matter including hypernucleiPoster
Symmetry and symmetry breaking play significant roles in physics. In this contribution, we will discuss our recent progress on the emergent symmetry in dense nuclear matter which are hidden in the matter-free space. This discussion sheds light on the mechanisms of chiral symmetry breaking, scale symmetry breaking and also the flavor symmetry breaking.
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Dr Xu Cao26/09/2017, 19:00Exotic states and candidatesPoster
Compton scattering off the proton in the third resonance region is analyzed , owing to the full combined analysis of pion- and photo-induced reactions in a coupled-channel effective Lagrangian model with K-matrix approximation. Two isospin I=3/2 resonances D33(1700) and F35(1930) are found to be essential in the range of 1.6 - 1.8 GeV. The recent beam asymmetry data of Compton scattering from...
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Dr Chuwen Xiao (IKP-3 & IAS-4, Forschungszentrum Jülich)26/09/2017, 19:00Exotic states and candidatesPoster
Using the chiral unitary approach, combining with the heavy quark spin symmetry, we investigate the interactions of $J/\psi N$ with its coupled channels and look for the dynamical resonances in the interactions. One of the two $P_c$ states, $P_c (4450)$, found by LHCb experiments, is explained as a $\bar{D}^* \Sigma_c$ bound state in our theoretical model. To understand the properties of this...
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Rafel Escribano26/09/2017, 19:00Hadron decaysPoster
$\eta$ and $\eta^\prime$ transition form factors and Padé approximants
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Julia Sammet (Universität Frankfurt Institut für theoretische Physik)26/09/2017, 19:00Hadron decaysPoster
We calculate two- and three-body decays of the (lightest) vector glueball into (pseudo)scalar,
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(axial-)vector, as well as pseudovector and excited vector mesons in the framework of a model of
QCD. While absolute values of widths cannot be predicted because the corresponding coupling
constants are unknown, some interesting branching ratios can be evaluated by setting the mass of
the yet... -
Pablo G. Ortega (University of Salamanca)26/09/2017, 19:00QCD and hadron structurePoster
Counting hadronic states and QCD thermodynamics in a finite box are intimately
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related. At small temperatures hadronic states are expected to saturate the partition
function, so, accepting the Particle Data Group (PDG) table [1] as the reference for
hadronic states, all the states listed by the PDG should also be counted as genuine
contributions to the QCD partition function and, hence,... -
Kamil Serafin (University of Warsaw)26/09/2017, 19:00Spectroscopy of mesonsPoster
Hadrons composed of heavy quarks are the simplest ones to study in QCD.
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They provide an affordable theoretical laboratory for investigating
the dynamics of gluons, mainly because quarks move slowly with respect
to each other as the sources of gluons and in the analysis of heavy meson
states one can safely take advantage of asymptotic freedom and expand
renormalized interactions in powers of... -
Ho-Meoyng Choi (Kyungpook National University, Daegu 41566, Korea)26/09/2017, 19:00QCD and hadron structurePoster
We investigate (π0, η, η0) → γ∗γ transition form factors (TFFs) for both
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space- and timelike regions using the light-front quark model. For the low
energy regime, we compare our LFQM results of the TFFs for low timelike
momentum transfer region and the slope parameters at q2 = 0 with the
recent experimental data from the Dalize decays of (π0, η, η0). For the high
energy regime, we show the... -
Marián Kolesár (Charles University, Faculty of Mathematics and Physics)26/09/2017, 19:00QCD and hadron structurePoster
The eta→3pi decays are a valuable source of information on low energy QCD. We present our updated results
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for the extraction of the three flavor chiral symmetry breaking order parameters from these processes.
We use a Bayesian approach in the framework of resummed chiral perturbation theory to extract
information on the quark condensate and pseudoscalar decay constant in the chiral limit, as... -
Ludovico Bianchi (Forschungszentrum Jülich)26/09/2017, 19:00Exotic states and candidatesPoster
Following the discovery of the X(3872), several exotic states, collectively known as XYZ states, have recently been identified in the energy region of charmonium. Searches with proton-antiproton collisions, such as the upcoming PANDA experiment at FAIR, will play an essential role in the effort to shed light on the nature of these states, since the direct production mechanisms and high rates...
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Walid Mian (University of Graz)26/09/2017, 19:00Hadron decaysPoster
In binary neutron star mergers the dynamical backcoupling of the electroweak interaction to the neutron matter is relevant. To desribe this, a coupled non-perturbative treatment of both sectors is necessary. Functional methods, like Bethe-Salpeter-Equations and the Functional-Renormalization-Group can be used for this purpose. Since the dominant process is beta-decay, a first necessary step is...
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Santiago Cortes (Universidad de los Andes)26/09/2017, 19:00QCD and hadron structurePoster
We study thermal properties of a large-$N$ massless pion gas via a low-energy QCD approach given by an $O(N + 1)/O(N)$ nonlinear sigma model. In order to attain this, we build diagrammatically the associated free energy to $O(TM^{3})$ in the pion mass expansion through an effective vertex; we consider this since all its contributions coming from closed diagrams are to be taken into account. At...
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Shin Hyung Kim (Korea University)26/09/2017, 19:00Analysis toolsPoster
The time projection chamber(HypTPC) has been developed for the H-dibaryon search experiment via (K-,K+) reactions at J-PARC. The high rate secondary beam up to 10^6 Hz from the world highest intensity proton beam should be taken into account. The HypTPC has the octagonal drift volume defined by the field cage, the cathode plane at the top and the amplification region at the bottom. The drift...
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Prof. Carlos Merino (Departamento de Fisica de Particulas, Facultade de Fisica and Instituto Galego de Fisica de Altas Enerxias (IGFAE), Universidade de Santiago de Compostela (Spain))26/09/2017, 19:00QCD and hadron structurePoster
We use the Quark-Gluon String Model to obtain a quantitatively good description of the phi-meson production
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experimental data in hadron-nucleon collisions on the spectra of secondary phi, as well as on the ratios of
phi/pi- and phi/K- production cross sections, for a wide energy region. We also consider the experimental
data on phi-meson production on nuclear targets, and we find that they... -
Yasuhiro Yamaguchi (RIKEN)26/09/2017, 19:00Exotic states and candidatesPoster
The observation of the hidden-charm pentaquarks by the LHCb collaboration indicates an existence of exotic hadrons close to hidden-charm meson-baryon thresholds. In the literature, various model calculations have been performed such as the hadronic molecules and the compact multi-quark states. The observed states appear below the thresholds, and it indicates that the states are a loosely...
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Mr Phillip Lakaschus (University Frankfurt), Justin Mauldin (Goethe University), Francesco Giacosa (Kielce University)26/09/2017, 19:00Exotic states and candidatesPoster
We investigate the two-flavor version of the extended linear sigma model (eLSM), which contains, besides the standard scalar and pseudoscalar quark-antiquark degrees of freedom, also vector and axial-vector mesons, as well as the nucleon and its chiral partner. We extend this model by an additional light scalar meson, a potential four-quark state, and the scalar glueball. We investigate...
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Wolfgang Lucha (Austrian Academy of Sciences)26/09/2017, 19:00QCD and hadron structurePoster
The consistent simultaneous interpretation of pions and kaons both as bound states of quark and antiquark and as the (almost) massless boson states related, according to Goldstone’s theorem, to the dynamical (and explicit) breakdown of the chiral symmetries of QCD still represents a major challenge. Applying inversion to sufficiently simplified versions of the homogeneous Bethe–Salpeter...
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Mrs Nora Weickgenannt26/09/2017, 19:00Spectroscopy of mesonsPoster
We study isospin-breaking effects in the extended linear sigma model (eLSM) for $N_f=3$ quark flavors. The eLSM contains scalar, pseudoscalar, vector, and axial-vector mesons, which consist of quarks and antiquarks. It is constructed on the basis of a global chiral $U(N_f)_L \times U(N_f)_R$ symmetry which is spontaneously broken by a quark-antiquark condensate, as well as explicitly broken by...
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Dr Maxim Andreichikov (Instutiute for Theoretical and Experimental Physics)26/09/2017, 19:00Spectroscopy of mesonsPoster
The spectra of charged and neutral rho and pi-mesons in uniform homogeneous magnetic field (MF) are discussed in the framework of the path integral formalism and vacuum correlator method. The spectra of all 12 spin-isospin s-wave meson states were obtained analytically using the Hamiltonian for quarks with confinement potential in strong magnetic field. The states have 3 different types of...
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Jonas Schneitzer (Goethe University Frankfurt, Germany)26/09/2017, 19:00QCD and hadron structurePoster
The extended Linear Sigma Model (eLSM) is an effective hadronic model based on the linear realization of chiral symmetry
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$U(N_f)_L \times U(N_f)_R$, with (pseudo-)scalar and (axial-)vector mesons as degrees of freedom. We study the
low-energy limit of the eLSM for $N_f=3$ by integrating out all fields except for the (pseudo-)Nambu-Goldstone bosons of
chiral symmetry breaking. After keeping... -
Zalak Marfatia (Sardar Vallabhbhai National Institute of technology)26/09/2017, 19:00Exotic states and candidatesPoster
In the potential model frame work, we study the S-wave molecular like structure of the di-baronic systems which consist baryon-baryon or baryon-antibaryon as a constituents. The mass spectra of the $\Sigma_{c}-\Sigma_{c}$ and $\Sigma_{c}-\overline{\Sigma_{c}}$ are predicted. By taking the deuteron as an approximation for our model calculation, the S-wave mass spectra of the molecular...
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Edoardo Mornacchi (Johannes Gutenberg-Universität Mainz)26/09/2017, 19:00Spectroscopy of baryonsPoster
The electric ($\alpha_{\text{E1}}$) and magnetic ($\beta_{\text{M1}}$) scalar polarizabilities are fundamental properties related to the internal structure of the nucleon. They play a crucial role not only in our understanding of the nucleon, but also in other areas such as atomic physics. In the past, the values of $\alpha_{\text{E}1}$ and $\beta_{\text{M}1}$ were determined from the...
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Dr Ahmed Bakry (Institute of Modern Physics, CAS)26/09/2017, 19:00QCD and hadron structurePoster
Using Polyakov loop correlators, we calculate the quark potential and energy density profile in pure SU(3) Yang-Mills theory. We investigate the limiting case where the string in baryonic quark configuration approaches the behavior of mesonic strings. We compare the potential and the energy density width profile of diquark-quark and mesonic strings. For isosceles triangular quark...
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Dmitri Melikhov (HEPHY)26/09/2017, 19:00QCD and hadron structurePoster
We study four-point functions of bilinear quark currents in QCD at large-Nc and obtain conditions for the existence of narrow tetraquark states. We then discuss three-point functions involving one tetraquark interpolating current and two biblinear quark currents and obtain the large-Nc behavior of the tetraquark decay constants. Finally, we discuss the implications of these results for the...
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Antonio González, Carlos Quezada26/09/2017, 19:00QCD and hadron structurePoster
We continue previous studies of O(N) sigma models whose symmetry suffers of a spontaneous breaking down to O(N-1). We also consider soft explicit breaking terms, first, through an ad hoc variation of the potential and, in a second step, via one-loop corrections to the effective potential. These models are of a high interest for beyond Standard Model extensions (the minimally composite Higgs...
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Dr Jorge Segovia (Technische Universität München)26/09/2017, 19:00Hadron decaysPoster
The $J/\psi\to \gamma\eta_{c}$ branching fraction was first measured in $1986$ by the Crystal Ball Collaboration in the inclusive photon spectrum and the value ${\cal B}(J/\psi\to \gamma\eta_{c}\to \gamma X)=(1.27\pm0.36)\%$ was obtained. There are many theoretical predictions for this decay rate, based on potential models, QCD sum rules, nonrelativistic EFTs and lattice QCD, but as a rule...
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Dr Valery Lyuboshitz (Joint Institute for Nuclear Research, Dubna )26/09/2017, 19:00Spectroscopy of mesonsPoster
The coherent inelastic processes of the type $a \rightarrow b$, which may take place in the interaction of hadrons and $\gamma$ quanta with nuclei at very high energies (the nucleus remains the same), are theoretically investigated. For taking into account the influence of matter inside the nucleus, the optical model based on the concept of
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refraction index is applied. Analytical formulas for... -
Milena Piotrowska (Jan Kochanowski University)26/09/2017, 19:00Hadron decaysPoster
We study the decays of two nonets of excited vector mesons which predominantly correspond to $n \hspace{0.15cm} ^{2s+1}L_J = 2 ^{3}S_{1}$ (radially excited vector mesons) and $n \hspace{0.15cm}^{2s+1}L_J = 1 ^{3}D_{1}$ (angular-momentum excited vector mesons). By using a quantum field theoretical approach we evoluate the decay widths of these mesons into two pseudoscalar mesons and into...
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Dr Tomohito MAEDA (Nihon University)26/09/2017, 19:00Hadron decaysPoster
Since 2010, candidates for the highly excited states of charmed mesons have been successively observed by the BABAR and LHCb collaborations. Although several theoretical studies have been done, spectroscopic assignments for these states still remain to be completely elucidated.
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In this work, following our previous work [1], we study extensively the pionic decays of the radial and highly... -
Natalie Walford26/09/2017, 19:00Spectroscopy of baryonsPoster
A comparison of experimentally observed excited nucleon states to model predictions or lattice QCD calculations is made, large differences arise, specifically concering the number of excited states. In order to fully understand the strong interaction in the non-perturbative region, the excitation spectrum of nucleons is an important tool to use. The electromagnetic coupling of photons to...
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Dr Valery Lyuboshitz (Joint Institute for Nuclear Research, Dubna )26/09/2017, 19:00Hadron decaysPoster
Spin correlations for the $\Lambda\Lambda$ and
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$\Lambda\bar{\Lambda}$ pairs, produced in relativistic heavy-ion collisions, and related angular correlations at the joint registration of space-parity nonconserving hadronic decays
of two hyperons are theoretically analyzed. These correlations give important information about the character and mechanism of multiple processes, and the advantage of... -
Tatsuro Matsuda (Miyazuki University (JP))26/09/2017, 19:00Spectroscopy of baryonsPoster
We measure the inclusive production cross sections of hyperons and
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charmed baryons from e+e- annihilation using a 800 fb-1 data sample
taken near the Υ(4S) resonance with the Belle detector at the KEKB
asymmetric-energy e+e- collider. The feed-down contributions from
heavy particles are subtracted using our data, and the direct
production cross sections are compared for the first time. The... -
Shohei Nishida (KEK)26/09/2017, 19:00Exotic states and candidatesPoster
A new alternate chi_c0(2P) charmonium state, X*(3860), has been observed
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with a significance of 6.5sigma using full amplitude analysis of the
process e+e- -> J/psi D Dbar. We also perform search for
exotic states such as hidden-strangeness penta-quark.
All the results presented here exploits the full data set of Belle. -
Prof. Haijun Wang (Jilin University)26/09/2017, 19:00QCD and hadron structurePoster
In analogy to the QED, we analyze the polarizations of gluon and clarify the role of colours within gluons. The effect of polarizations is associated with the spin angular momentum of gluon. Consequently we point out the dependence between colour field and angular-momentum, which can give us an explanation why we cannot confirm the total angular momentum of a high-energy scattering system....
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Dr Shuntaro Sakai (IFIC, University of Valencia)26/09/2017, 19:00Analysis toolsPoster
We have analyzed the $\gamma p \rightarrow p \pi^0 \eta$ process with a particular focus on the role of the triangle singularity which appears in the decay of the $\Delta(1700)$ into $\eta \Delta(1232)$,
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where the $\Delta(1232)$ goes into $p$ emitting a $\pi^0$, while the $N(1535)$ is formed from the $\eta p$ interaction.
In addition to the triangle diagram, we take account of the tree level... -
Felipe J. Llanes-Estrada (Univ. Complutense de Madrid)26/09/2017, 19:00Spectroscopy of mesonsPoster
How much information is added to the Review of Particle
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Physics when a new decay branching ratio of a hadron is measured and
reported? This is quantifiable by Shannon's information entropy. It may
be used at two levels, the distribution of decay-channel probabilities,
and the distribution of individual quantum-state probabilities
(integrating the later provides the former). We illustrate... -
Vinicius Rodrigues Debastiani (IFIC, University of Valencia)26/09/2017, 19:00Exotic states and candidatesPoster
We introduce a non-relativistic framework to study the spectroscopy of hadronic bound states composed of four charm quarks in the diquark-antidiquark picture. By numerically solving the Schr\"{o}dinger equation with two different Cornell-inspired potentials in a similar way of heavy quarkonium models of mesons, we factorize the 4-body problem into three 2-body systems: first the diquark and...
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Amel Belounnas (IPN Orsay)26/09/2017, 19:00Hadron decaysPoster
Pion production in NN collisions is one of the sources of information on the NN
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interaction and on the contribution of nucleon resonances. In particular, two-pion production in the few energy range, carries information both on $\pi\pi$ dynamics and on single and double baryon excitation.
The High Acceptance Di-Electron Spectrometer (HADES) [1] installed at GSI Helmholtz-Zentrum für... -
Zahra Ghalenovi (Kosar University of Bojnourd)26/09/2017, 19:00QCD and hadron structurePoster
In this work, we study the properties of the light baryons employing a constituent quark model in the hypercentral approach. The model considers through the interacting potential one-gluon exchange, Goldstone boson exchange and confinement, aspects of underlying theory, quantum chromodynamics. We introduce three different potential models and solve Schrodinger equation of the baryonic system...
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Dr Sergey Sukhoruchkin (B.P. Konstantinov Petersburg Nuclear Physics Institute of NRC "Kurchatov Institute")26/09/2017, 19:00QCD and hadron structurePoster
In this work a continuation of an analysis of fine structure effects in nuclear
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data is combined with the analysis of particle mass data.
The material used in the work is based on nuclear data compilations collected
in PNPI and data from the Compilations PDG-2016 and the evaluation CODATA.
These data provide a base for the combined analysis of all existing information
for suggested by... -
Prof. Andrew Koshelkin (National Research Nuclear University)26/09/2017, 19:00QCD and hadron structurePoster
By breaking the initial SU(N) symmetry, we derive the Lagrangian[1] governing the dynamics of the massive scalar particles, which can be treated as the octet of the pseudoscalar mesons. The contribution of both the quark-gluon interaction and self-interaction gluon fields into the masses of the octet of particles is considered. Provided that the hadronization of the confinement matter...
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Sergey Koshkarev (Institute of Physics, University of Tartu)26/09/2017, 19:00QCD and hadron structurePoster
Even though the mechanism is still under discussion, the intrinsic heavy quark mechanism is a rigorous prediction of Quantum Chromodynamics.
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Assuming this mechanism to exist, in our talk we discuss how we can naturally explain one of the most intriguing and surprising results in modern baryonic physics, namely the production properties of the double charmed baryons measured by the SELEX... -
Dr Valery Lyuboshitz (Joint Institute for Nuclear Research, Dubna )26/09/2017, 19:00Hadrons in matter including hypernucleiPoster
Using the analogy with the problem of ionization and
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excitation of atoms at the propagation of relativistic charged particles through matter, the process of Coulomb dissociation of weakly bound relativistic nuclei and hypernuclei is theoretically investigated in the framework of the two-cluster deuteron-like model. Explicit expressions for the total cross-section of Coulomb disintegration of... -
Melahat Bayar (Kocaeli University)26/09/2017, 19:00Exotic states and candidatesPoster
We study the ρB∗B¯∗ three-body system solving the Faddeev equations in the fixed center approximation. We assume the B∗B¯∗ system forming a cluster, and in terms of the two-body ρB∗ unitarized scattering amplitudes in the local Hidden Gauge approach we find a new I(J^PC)=1(3^−−) state. The mass of the new state corresponds to a two particle invariant mass of the ρB∗ system close to the...
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Prof. Elşen Veli Veliev (Kocaeli University)26/09/2017, 19:00Exotic states and candidatesPoster
During last decade properties of the tetraquark states, which may play an essential role in understanding of hadron dynamics, are among widely discussed problems in the literature. In this work we investigate the thermal features of the state X(3872) with the quantum numbers JPC = 1++. We consider it as a diquark-antidiquark bound state and use QCD sum rule method to explore the nature of...
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Prof. Eugenio Megias (University of the Basque Country)26/09/2017, 19:00Exotic states and candidatesPoster
Themal shifts and fluctuations at finite temperature below the deconfinement crossover from hadronic matter to the quark-gluon plasma provide a viable way to look for missing states with given quantum number in the hadronic spectrum. We study a realization of the hadron resonance gas (HRG) model in the light quark (uds) flavour sector of QCD to study the fluctuations of baryon number, charge...
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Prof. Lisheng Geng (Beihang University)26/09/2017, 19:00Exotic states and candidatesPoster
We report on a recent study of the Bsπ and BK¯ interactions in finite volume [1]. We show the discrete energy levels in two scenarios whether the coupled channel interactions are either strong enough to dynamically generate the X(5568) or too weak to produce it. Supplemented by the state of the art lattice QCD simulations, our study supports the picture that the interactions are weak and the...
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