Hadron Structure and QCD (HSQCD'2018) Dedicated to the Memory of Lev N. Lipatov (2.05.1940 - 4.09.2017)

6 Aug 2018, 11:00 → 10 Aug 2018, 20:00 Europe/Moscow

Main Conference Hall, NRC KI - PNPI, Gatchina

An international Conference "Hadron Structure and Quantum Chromodynamics" (HSQCD'2018) is organized by Petersburg Nuclear Physics Institute of National Research Centre "Kurchatov Institute", St. Petersburg State University, St. Petersburg Polytechnic University, V.A. Fock Institute of Physics, Institute of Physics of Slovak Academy of Sciences and Comenius University, Bratislava. It will be held on August 6 - 10, 2018 at Gatchina, a picturesque southern suburb of St. Petersburg, especially wonderful in period of the famous white nights. Plenary and parallel sessions will be carried out at the site of Petersburg Nuclear Physics Institute NRC KI, Gatchina. The aim of this Conferences is to review the recent progress in the hadronic physics, QCD, the Standard Model and its generalizations.

The joint Conference unifies the series of two Conferences: "Hadron Structure" held in Slovakia from 1973, and "Hadron Structure and QCD" held in St. Petersburg from 2004. Now the joint Conference is carried out annually, in the odd years in Slovakia and in the even years in Russia. The first joint Conference HS’07 was held in Slovakia, 2007.

The physics topics of the Conference include:

• perturbative QCD, DGLAP- and BFKL-evolutions
• polarized and nonpolarized parton distribution functions
• Pomeron, hard diffraction and small-x physics
• heavy-ion collisions, quark-gluon matter
• nonperturbative QCD, lattice computations, chiral model of hadrons
• hadron spectroscopy, exotic states
• physics of the LHC and future colliders
• precision tests of the Standard Model, extensions of the Standard Model
• neutrino physics

Main HSQCD'2018 website: http://hepd.pnpi.spb.ru/~hsqcd

hsqcd2018_agenda_1.pdf

hsqcd2018_timetable_9.pdf

Monday 6 August

11:00 → 11:50 Registration: Main Conference Hall Lobby

11:50 → 13:00 Monday Morning: Opening Session

11:50 Opening

12:00 Memories of Lev Lipatov, a scientist and a man

Speaker: Victor Fadin (BINP RAS)

Memories of Lev Lipatov, a scientist and a man.pdf

13:00 → 14:15 Lunch

14:30 → 16:00 Monday Afternoon

14:30 Black disk, central diffraction and unitarity

Speaker: Mikhail Ryskin (Petersburg Nuclear Physics Institute)

1_Ryskin_Blask disk_hsqcd18.pdf

15:00 QCD asymptotics at collider energies

Speaker: Victor Kim (St. Petersburg Nuclear Physics Institute - PNPI, Gatchina & SPbPU, St.Petersburg)

kim_hsqcd2018.pdf

15:30 Chiral imbalance: its manifestation in hadron matter

Chiral imbalance: its manifestation in meson decays. Instability of chiral charge density, possible generation by Schwinger effects

Speaker: Alexander Andrianov (Saint Petersburg State University)

andrianov_HSQCD2018_short.pdf

andrianov_HSQCD2018_short.ppt

16:00 → 16:20 Coffee

16:20 → 17:50 Monday Evening

16:20 Reggeon Webs, spin chains and the Odderon

We will discuss how to solve the Odderon problem in perturbative QCD and its relation to open spin chains in the N=4 super Yang-Mills theory.

Speaker: Agustin Sabio Vera (Universidad Autonoma de Madrid (ES))

ASabioVera-Gatchina-August-2018(3).pdf

16:50 Non-perturbative BFKL Pomeron from Integrability in N=4 SYM

Speaker: Nikolay Gromov (King's College London)

Gatchina2018.pdf

Gatchina2018.pptx

17:20 Memory recollection on Lev N. Lipatov

Lipatov&low-x.pdf

18:00 → 18:10 Bus departure to Gatchina Pavel Palace

18:30 → 21:30 Gatchina Pavel Palace: Concert & Welcome Party

18:30 Piano Concert by Oleg Weinstein

19:30 Welcome Party

Tuesday 7 August

09:30 → 11:00 Tuesday Morning

09:30 Latest CMS results

Some latest Run II CMS results on Higgs measurements and Beyond the Standard Model physics searches are reviewed

Speaker: Guenakh Mitselmakher (University of Florida (US))

2018.07.21_HiggsExotica_summary-v5.pdf

10:15 Latest ATLAS results

Speaker: Oleg Solovyanov (Institute for High Energy Physics (RU))

Solovyanov_HSQCD2018.pdf

11:00 → 11:20 Coffee

11:20 → 13:05 Tuesday Morning

11:20 Latest results from LHCb

Latest results from LHCb experiment will be presented

Speaker: Vitaly Vorobyev (Budker Institute of Nuclear Physics (RU))

vorobyev-lhcb_results_hsqcd18_v2.pdf

vorobyev-lhcb_results_hsqcd18_v2.pptx

12:05 B baryon decays at LHCb

The talk will be on behalf of the LHCb CollaborationThe LHCb experiment is designed to study heavy hadrons produced in proton-proton collisions at the LHC. Charmed and beauty hadrons produced in the pp-collision are studied to identify new states, confirming or disproving those recently claimed, and establishing their quantum numbers. The latest results on heavy baryon decays based on the data collected by the LHCb experiment in Run-1 and Run-2 of LHC will be presented.

Speaker: Slava Matiunin (Institute for Theoretical and Experimental Physics (RU))

Matiunin_presentation_HSQCD_final.pdf

12:35 BSM searches with the ATLAS detector

We present the recent results on the confinement/deconfinement transition in lattice SU(2) QCD with two flavors of quarks at finite quark density and zero temperature. In the region μq ∼ 1000 MeV we observe the confinement/deconfinement transition which manifests itself in rising of the Polyakov loop and vanishing of the string tension σ. After the deconfinement is achieved at μq > 1000 MeV we observe a monotonous decrease of the spatial string tension σs which ends up with σs vanishing at μq > 2000 MeV. To study the properties of cold dense quark medium we measure the dependence of chiral and diquark condensates, quark density, topological susceptibility and other physical quantities on the chemical potential.

Speaker: Marco Battaglia (University of California,Santa Cruz (US))

HSQCD2018-MB.pdf

13:05 → 14:15 Lunch

14:30 → 16:00 Tuesday Afternoon

14:30 Proton radius puzzle: theory vs experiment

Brief review of the proton radius problem is given. In the framework of the quasipotential method in quantum electrodynamics we calculate the contribution of light pseudoscalar (PS) and axial-vector (AV) mesons to the interaction operator of a muon and a proton in muonic hydrogen atom. The coupling of mesons with the muon is via two-photon intermediate state. The parametrization of the transition form factor of two photons into PS and AV mesons, based on the experimental data on the transition form factors and QCD asymptotics, is used. Numerical estimates of the contributions to the hyperfine structure of the spectrum of the S and P levels are presented. It is shown that such contribution to the hyperfine splitting in muonic hydrogen is rather important for a comparison with precise experimental data.

Speaker: Alexander Dorokhov (JINR)

6_Dorokhov_SPLipatov_HFS_08_07.pdf

15:00 Present status of the determination of the proton radius

I will discuss the present status of the determination of the proton radius. Starting with 2010 there is a controversy within the results obtained from electron-proton scattering, hydrogen and deuterium spectroscopy and spectroscopy of muonic hydrogen and deuterium.I will briefly review the situation and its recent development.

Speaker: Savely Karshenboim (LMU & MPQ & Pulkovo Obs.)

7_puzzle2018.pdf

7_puzzle2018.ppt

15:30 Project for Precision Measurement of the Proton Charge Radius in Electron-Proton Scattering

Speaker: Alexei Vorobyev (Petersburg Nuclear Physics Institut (RU))

8_proton _HSQCD2018 conference.pdf

8_proton _HSQCD2018 conference.ppt

16:00 → 16:20 Coffee

16:20 → 18:20 Tuesday Evening

16:20 Exotics hadron states at LHCb

The exotic hadrons, those, which have content beyond the conventional scheme of mesons, consisting of a quark and an antiquark, and baryons, consisting of three quarks, were predicted with the quark model itself. However first observation of an exotic candidate was made only less than 15 years ago. Since then quite a number of exotic-like states was discovered and some of them were proved to consist of more than three quarks. Various theoretical approaches predict different masses and quantum numbers of such states. Thus search for the new exotic hadrons and study of their properties is important for better understanding of their internal structure. The talk will cover the latest results on the topic from the LHCb experiment.

Speaker: Daria Savrina (M.V. Lomonosov Moscow State University (RU))

9_Savrina_ExoticAtLHCb_StPetersburg_v2.pdf

16:50 Charm Physics at LHCb

Recent results of the LHCb experiment in the charm physics field will be presented. The contribution will cover spectroscopy of the charmed particles, search for there rare decays, as well as for CP violation effects in charm sector.

Speaker: Aleksei Dziuba (Petersburg Nuclear Physics Institut (RU))

10_A.Dzyuba_Charm Physics at LHCb.pdf

10_A.Dzyuba_Charm Physics at LHCb.pptx

17:20 Prospects of discovering stable double-bottom tetraquarks

Speaker: Alexander Parkhomenko (Yaroslavl State University)

11_Parkhomenko-HSQCD-2018.pdf

17:45 Baryons and Nuclei Structure at High pT Processes

Speaker: Stepan Shimanskiy (JINR, Dubna)

12_shimanskiy_Baryons and Nucleu Structure.pdf

Wednesday 8 August

09:30 → 11:00 Wednesday Morning

09:30 Astroparticle Physics at CERN

Results from ALICE Cosmic Ray Physics program and MATHUSLA Experiment Proposal

Speaker: Arturo Fernandez Tellez (Autonomous University of Puebla (MX))

HSQCD_2018-_A_Fernandez_Tellez-final.pdf

Slide_lhcp19.pdf

10:15 Present status of neutrino oscillations

Speaker: Yury Kudenko (Russian Academy of Sciences (RU))

kudenko_hsqcd18.pdf

11:00 → 11:20 Coffee

11:20 → 13:05 Wednesday Morning

11:20 EDM at storage rings: theory and experiment

Speaker: Nikolay Nikolaev (Landau ITP RAS)

GatchinaHSQCD2018.pdf

GatchinaHSQCD2018.pptx

12:00 Levy analysis of Bose-Einstein correlations in pp-collsions at 7 TeV measured with the ATLAS

Speaker: Valery Schegelsky (NRC KI - PNPI)

slides_PSQCD_2018.pdf

12:30 Lipatov's effective action and S-matrix in high energy QCD

Speaker: Sergey Bondarenko (Ariel University)

PiterLipatovAction.pdf

13:05 → 14:15 Lunch

14:30 → 16:00 Wednesday Afternoon

14:30 BFKL equation and Regge cuts

The derivation of the BFKL equation based on the unitarity relations is strongly complicated in the next-to-next-to-leading logarithmic approximation. The main reason of the complification is appearance of Regge cuts in amplitudes with gluon quantum numbers in the cross channels and negative signature.

Speaker: Victor Fadin (Budker Institute of Nuclear Physics)

HSQCD talk.pdf

15:00 `Elliptic' multiloop integrals: the last stronghold

Speaker: Roman Lee (Budker Institute of Nuclear Physics)

LeeHSQCD.pdf

15:30 Skewed Sudakov Regime

A new kinematic regime for the vertex functions of gauge theories is discussed

Speaker: Grigory Pivovarov (Russian Academy of Sciences (RU))

hsqcd18-pivo.pdf

16:00 → 16:20 Coffee

16:20 → 19:10 Wednesday Evening

16:20 Holographic anisotropic QCD

Speaker: Irina Arefeva (MI RAS, Moscow)

HSQCD-arefeva.pdf

16:45 High energy heavy quark hadroproduction in k_T factorization

Speaker: Andrey Shuvaev (NRC KI - PNPI)

Shuvaev_hqprod.pdf

17:10 DIS at small x and hadron-hadron scattering at high energies via the holographic Pomeron exchange

Speaker: Akira Watanabe

Akira_Watanabe.pdf

17:35 Angular correlations in particle pair production at LHC within the parton Reggeization approach

Speaker: Vladimir Saleev (Samara State University)

Saleev_hsqcd_2018.pdf

18:00 Classical solution for reggeized gluons and one loop corrections to Lipatov’s effective action

Speaker: Semyon Pozdnyakov (Saint Petersburg State University)

HSQCD2018_pozdnyakov.pdf

Thursday 9 August

09:30 → 11:00 Thursday Morning

09:30 Standard Model and Higgs physics with the ATLAS detector

I will present the latest results from the ATLAS experiment on measurements of the Standard Model and Higgs boson production processes.

Speaker: Jelena Jovicevic (TRIUMF (CA))

HSQCD.pdf

10:00 Electroweak Z boson production with associated hadronic jets at CMS

CMS data at 13 TeV for electroweak Z boson production with associated hadronic jets are presented. The measurement is based on data recorded in 2016 by the CMS experiment at the LHC corresponding to an integrated luminosity of 35.9 fb−1. The measured cross section is in agreement within the experimental uncertainties with the standard model predictions in the leading order approximation.

Speaker: Vadim Oreshkin (Petersburg Nuclear Physics Institut (RU))

oreshkin.pdf

10:30 Dijets with large rapidity separation at CMS

Search for asymptotic BFKL effects at CMS in dijet events with large rapidity separation between jets in proton-proton collisions at 7 TeV is presented. CMS data on cross-section ratios and azimuthal decorrelations for dijets with large rapidity separation between jets are compared with predictions by various Monte Carlo event generators based on DGLAP and BFKL evolutions.

Speaker: Viktor Murzin (Petersburg Nuclear Physics Institut (RU))

murzin_hsqcd2018_v5.pdf

11:00 → 11:20 Coffee

11:20 → 13:05 Thursday Morning

11:20 From pp to p-Pb, Pb-Pb and Xe-Xe Collisions in ALICE at the LHC

We present highlights of recent studies by ALICE on energy and system size dependence of multi-particle production in pp, p-Pb and A-A collisions at various energies, investigations of production of light nuclei, including exotic states of hypernuclei, new flow-like effects and collective phenomena in small systems, long-range correlations in hadron collisions at the LHC, as well as the puzzles which are still unsolved (the unexpected signals of collectivity in small systems: the elliptic flow of D- mesons in p-Pb and strangeness yields increase in high multiplicity pp collisions, etc.). The new possibilities of the ALICE program, aimed at the precise studies of rare processes of heavy flavour formation, will be also touched briefly.

Speaker: Dr Grigori Feofilov (St Petersburg State University (RU))

HSQCD-Gatchina-2018-version-03.pdf

12:05 Vorticity and particle polarization in heavy ion collisions

Speaker: Sergey Voloshin (Wayne State University (US))

201808HSQCD__Vorticity.pdf

12:35 Self-Similarity of Negative Particle Production in Au+Au Collisions at STAR

Results of a new analysis of negative charged particle yields in $Au+Au$ collisionsas a function of transverse momentum obtained by the STAR Collaboration for the first phase of the RHIC Beam Energy Scan Program in the framework of the $z$-scaling approach are presented.The spectra were measured over a wide range of collision energy $sqrt {s_{NN}}~=~7.7-200$~GeV and transverse momentum of produced particles in different centralities at $|eta|

Speaker: Mikhail Tokarev (Joint Institute for Nuclear Research)

HSQCD18_Tokarev_16.pdf

13:05 → 14:30 Lunch

14:30 → 16:00 Thursday Afternoon

14:30 Highlights from the PHENIX experiment

The PHENIX experiment at the relativistic heavy ion collider (RHIC) has finished data taking in 2016. However, a huge amount of data on p+p, p+A and A+A collisions taken at different collision energies in the last years of the detector operation is actively analysed by the collaboration and brings a wealth of new experimental results. In this talk, we present review of the most recent PHENIX results on the light and heavy flavor hadron production, yields and angular correlations of the direct photons, search for onset of collectivity in high multiplicity p+p and p+A collisions.

Speaker: Viktor Riabov (Petersburg Nuclear Physics Institut (RU))

HSQCD2018_VRiabov.pdf

15:15 Recent results from STAR

Speaker: Grigory Nigmatkulov (National Research Nuclear University MEPhI)

Nigmatkulov_hsqcd2018.pdf

16:00 → 16:20 Coffee

16:20 → 18:50 Thursday Evening

16:20 Observation of Deconfinement in a Cold Dense Quark Medium

We present the recent results on the confinement/deconfinement transition in lattice SU(2) QCD with two flavors of quarks at finite quark density and zero temperature. In the region μq ∼ 1000 MeV we observe the confinement/deconfinement transition which manifests itself in rising of the Polyakov loop and vanishing of the string tension σ. After the deconfinement is achieved at μq > 1000 MeV we observe a monotonous decrease of the spatial string tension σs which ends up with σs vanishing at μq > 2000 MeV. To study the properties of cold dense quark medium we measure the dependence of chiral and diquark condensates, quark density, topological susceptibility and other physical quantities on the chemical potential.

Speaker: Victor Braguta (ITEP)

report_braguta.pdf

16:50 Dijet photoproduction in UPCs at the LHC and nuclear PDFs at small-x

Speaker: Vadim Guzey (PNPI NRC KI)

guzey_hsqcd_2018.pdf

17:20 Hadron amplitudes in composite superconformal string model

Speaker: Alla Semenova

SemenovaHSQCD18.pdf

22:00 → 23:59 Night Boat Excursion: Night Boat Excursion: Bus from hotel Gatchina, 22:45 Bus from hotel PI-Pulkovskaya; Return buses: 2:45AM

Friday 10 August

10:30 → 11:30 Friday Morning

10:30 Symanzik approach in modeling the interaction of quantum fields with extended objects: scattering of Dirac particles on material plane.

Speaker: Yuri Pismak

Pismak HSQCD 2018 .pdf

10:50 The semi-phenomenological effective Hamiltonian of QCD on the light front

A semiphenomenological variant of the construction of the QCD Hamiltonian on the light front in the light front gauge is considered. This Hamiltonian is intended to describe the hadronic states constructed from "effective" quarks and gluons on the light front. Such Hamiltonian provides confinement for the quark-antiquark state both in the transverse direction and in the longitudinal (light-like) direction.

Speaker: Mikhail Malyshev (Saint Petersburg State University)

Malyshev_HSQCD2018.pdf

11:10 Few-nucleon systems in the Bethe-Salpeter approach

Speaker: Serge Bondarenko (Joint Institute for Nuclear Research (RU))

HSQCD-2018-Bondarenko.pdf

11:30 → 11:50 Coffee

11:50 → 13:10 Friday Morning

11:50 The relativistic contribution of states with a nonzero orbital angular momentum to the binding energy and the form factors of the triton

Three nucleon system(triton) was considered. Relativistic properties of this system were investigated. For this relativistic generalization of Faddeev approach was used. As two particle T-matrix which contained in relativistic Faddeev equation we used solution of Bethe-Salpeter equation. So eventually we had Bethe-Salpeter-Faddeev(BSF) equation for describe three nucleon system. As potential of nucleon-nucleon(NN) interaction we used saparabel potential.Form factors of this potential taken in Yamaguchi-type function. Using of separable potential in particular allow to reduce integration on two variables into integration on one variable in BSF equation. Six states 1S0,3S1,3D1,3P0,3P1 and 1P1 with different angular momenta were considered. For this we made particle wave decomposition of BSF equation. System of 12 integral equations(for real and imaginary parts of amplitudes of 1S0,3S1,3D1,3P0,3P1 and 1P1 states) was solved with usediteration method. Bound state energy of triton and amplitudes of S,P and D states was found. Amplitudes used for calculation electric and magnetic form factors of triton.

Speaker: Sergey Yurev (JINR, Dubna)

yurev.pdf

yurev.ppt

12:10 Charge splittings in piN-Delta formfactors

Experimental data on $pi N $ scattering in the elastic energy region $W leq 1.45 GeV $ are analyzed within the $K$-matrix approach with effective Lagrangians. The charge splitting in $delta^{++}_{33}$ and $delta^{0}_{33}$ phases obtained in the phase shift analysis is studied . It is shown that the change in the sign in the energy dependence of the phase difference can be obtained with different formfactors of the $Delta^{++}$ and $Delta^{0}$ only . This means that $Delta^{++}$ and $Delta^{0}$ has a different size in $pi N $ interaction.The underlying nature of the observed phenomena is discussed. $pi NDelta^{++} $ and $pi NDelta^{0} $interactions has a different range.

Speaker: Anatoly Gridnev (NRC KI - PNPI)

Gridnev_seminar.pdf

12:30 SUSY-like relation in evolution of gluon and quark jet multiplicities

Speaker: Anatoly Kotikov (JINR, Dubna)

Kotikov_RSC17_HSQCD18.pdf

12:50 Reggeon integrands in N=4 SYM

In this talk we are going to discuss all-loop conjecture for integrands of reggeon amplitudes in N=4 SYM. In particular we will present a new gluing operation in momentum twistor space used to obtain reggeon tree-level amplitudes and loop integrands from corresponding expressions for on-shell amplitudes. The introduced gluing procedure is used to derive BCFW recursions both for tree-level reggeon amplitudes and their loop integrands. In addition we provide predictions for reggeon loop integrands written in the basis of local integrals. As a check of the correctness of gluing operation at loop level we derive the expression for LO BFKL kernel in N=4 SYM.

Speaker: Andrei Onishchenko

Onishchenko_IntegrandsN4SYM-HSQCD2018.pdf

13:10 → 14:15 Lunch

14:30 → 19:30 Excursion by request: Peterhof Fountain Park