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BEGIN:VEVENT
SUMMARY:Meson production in e+e- annihilation and tau-lepton decays within
  extended NJL model
DTSTART;VALUE=DATE-TIME:20190227T052000Z
DTEND;VALUE=DATE-TIME:20190227T054000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-602@indico.inp.nsk.su
DESCRIPTION:Speakers: Andrej Arbuzov (Joint Institute for Nuckear Research
 )\nThe extended Nambu–Jona-Lasinio model is briefly described and variou
 s ways of its application are demonstrated. Theoretical treatment of low-e
 nergy meson production processes in colliding e+e- beams and tau lepton de
 cays is reviewed. The processes considered occur via intermediate scalar\,
  vector\, and axial-vector mesons in the ground state and in the first rad
 ial excited one. The model employed uses the concept of spontaneous chiral
  symmetry breaking to describe such states. Experimental and theoretical c
 omparisons with other phenomenological strong interaction models are prese
 nted. The talk is based on the review [M.K. Volkov\, A.B. Arbuzov\, Phys. 
 Usp. 60 (2017) 643] and a few later articles.\n\nhttps://indico.inp.nsk.su
 /event/15/contributions/602/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/602/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The decay J/ψ→γX(Jᴾ)→γϕϕ: Dynamical analysis of X(Jᴾ)
 →ϕϕ resonance contributions.
DTSTART;VALUE=DATE-TIME:20190227T044000Z
DTEND;VALUE=DATE-TIME:20190227T050000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-603@indico.inp.nsk.su
DESCRIPTION:Speakers: Arkadii Kozhevnikov (S.L. Sobolev Institute for Math
 ematics)\nThe dynamics of the  $J^{PC}=0^{-+}$\, $0^{++}$\, and $2^{++}$ r
 esonance contributions  to the decay $J/\\psi\\to\\gamma X(J^{PC})\\to\\ga
 mma\\phi\\phi$ is analysed using the data obtained by BESIII collaboration
 . The effective coupling constants parameterising invariant amplitudes of 
 the transitions $J/\\psi\\to\\gamma X(J^{PC})$ and $X(J^{PC})\\to\\phi\\ph
 i$ and masses of $X(J^{PC})$ resonances are found from the fits. They are 
 used for evaluation of the branching fractions $B_{X(J^{PC})\\to\\phi\\phi
 }$\, relative branching fractions $B_{J/\\psi\\to\\gamma X(J^{PC})\\to\\ga
 mma\\phi\\phi}$\, and for  obtaining the photon angular distributions.\n\n
 https://indico.inp.nsk.su/event/15/contributions/603/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/603/
END:VEVENT
BEGIN:VEVENT
SUMMARY:An amplitude analysis of the e+e−→4π  reaction
DTSTART;VALUE=DATE-TIME:20190301T022000Z
DTEND;VALUE=DATE-TIME:20190301T024000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-605@indico.inp.nsk.su
DESCRIPTION:Speakers: Evgeny Kozyrev (BINP)\nMy talk is about an analysis 
 of the process $e^+e^- \\to 4 \\pi$ with the CMD-3 detector at the VEPP-20
 00 Collider in the energy range 0.9--2.007 GeV. In my contribution I will 
 focus on the study of the intermediate dynamics of the reaction\, i.e. I w
 ill talk about the results in the distinguishing of different intermediate
  mechanisms. The dominance of the (omega pi0) and (a1 pi) amplitudes will 
 be proved. as well as the contribution of the rho+rho-\, rho f0. rho sigma
  and etc. states will be discussed. Also\, I will demonstrate the test of 
 the isospin relation between the processes e+e- \\to pi+ pi- 2pi0\n\nhttps
 ://indico.inp.nsk.su/event/15/contributions/605/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/605/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Isoscalar and isovector kaon form factors from e+e− and τ data
DTSTART;VALUE=DATE-TIME:20190227T050000Z
DTEND;VALUE=DATE-TIME:20190227T052000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-610@indico.inp.nsk.su
DESCRIPTION:Speakers: Konstantin Beloborodov (Budker Institute of Nuclear 
 Physics)\nThe recent precise measurements of the $e^+e^-\\to K_SK_L$ and $
 e^+e^-\\to K^+K^-$ cross sections and the hadronic spectral function of th
 e $\\tau^-\\to K^-K_S\\nu_\\tau$ decay are used to extract the isoscalar a
 nd isovector electromagnetic form ractors and their relative phase in a mo
 del independent way. The experimental results are compared with a fit base
 d on the vector-meson-dominance model.\n\nhttps://indico.inp.nsk.su/event/
 15/contributions/610/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/610/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Light Hadron Spectroscopy at BESIII
DTSTART;VALUE=DATE-TIME:20190227T042000Z
DTEND;VALUE=DATE-TIME:20190227T044000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-638@indico.inp.nsk.su
DESCRIPTION:Speakers: Tianjue Min (Nanjing University)\nLight Hadron Spect
 roscopy at BESIII\n\nhttps://indico.inp.nsk.su/event/15/contributions/638/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/638/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Neutral Pion Radiative Width: The Final Result from PrimEx (Je
 fferson Lab)
DTSTART;VALUE=DATE-TIME:20190301T020000Z
DTEND;VALUE=DATE-TIME:20190301T022000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-653@indico.inp.nsk.su
DESCRIPTION:Speakers: Ilya Larin (University of Massachusetts Amherst)\nTh
 e π 0 →γγ decay amplitude is determined by the chiral anomaly. Recent
  theoretical calculations\nhave been made within Chiral Perturbation Theor
 y and predict decay width at a percent precision\nlevel. Precise measureme
 nt of π 0 →γγ decay width gives a possibility to check these predicti
 ons.\nThe PrimEx experiment unutilized Primakoff effect to measure π 0 ra
 diative decay width.\nPrimakoff effect is a powerful tool for measuring ra
 diative width of particles. In this talk\, the final\nresult of the PrimEx
  experiment performed in Hall-B at Jefferson Lab will be presented. The\nP
 rimEx-I experiment performed in 2004 achieved precision of 2.8%. PrimEx-II
  has been\nconducted in 2010 with a collection of five times more statisti
 cs and achieved 1.6% precision.\nη→γγ decay width measurement experim
 ent planned at Jefferson Lab will also be discussed. The\nproject was supp
 orted in part by NSF MRI PHY 0079840 and RFBR 18-02-00938.\n\nhttps://indi
 co.inp.nsk.su/event/15/contributions/653/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/653/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Light mesons from JPAC analyses
DTSTART;VALUE=DATE-TIME:20190227T020000Z
DTEND;VALUE=DATE-TIME:20190227T022000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-644@indico.inp.nsk.su
DESCRIPTION:Speakers: Mikhail Mikhasenko (HISKP\, Universität Bonn)\nIden
 tifying properties of excited hadronic states in the light meson sector re
 mains an ongoing challenge\, due to large widths\, significant overlaps\, 
 and multiple decay channels of the resonances.\nA systematic approach usin
 g the unitarity-based coupled channel frameworks is required\; for the rea
 ction-independent determination of the resonance parameters\, the pole pos
 itions of the resonances need to be extracted.\nAs will be shown in the ta
 lk\, several works in this direction have been performed by the Joint Phys
 ics Analysis Center (JPAC) in the past year in the tensor ($J^{PC}=2^{++}$
 ) and exotic ($J^{PC}=1^{-+}$) waves of $\\eta(')\\pi$ system measured by 
 the COMPASS experiment ([PLB 779 (2018)](http://inspirehep.net/record/1609
 260) and\n[arXiv:1810.04171](http://inspirehep.net/record/1697661)).\nThe 
 spin-exotic sector $J^{PC}=1^{-+}$ is also accessible from the partial wav
 e analysis of the three pions system measured in diffractive reaction $\\p
 i\\\,p \\to 3\\pi\\\,p$\, however\, the studies are hampered by the presen
 ce of a large\, coherent\, non-resonant background\, known as the Deck pro
 cess. I will highlight ongoing work on a comparison of the various models 
 for this non-resonant production and show its influence found in the data.
  As the first steps in the route of understanding interaction in the $J^{P
 C}=1^{++}$ sector and the Deck process\, we have built a model based on th
 e approximate three-body unitary\, fixed the free parameters by fitting it
  to the clean ALEPH data on $\\tau\\to 3\\pi\\\,\\nu_\\tau$ decay. The pol
 e position of the $a_1(1260)$ has been extracted for the first time using 
 the unitary model ([PRD 98 (2018)\, 096021](http://inspirehep.net/record/1
 696497)).\n\nhttps://indico.inp.nsk.su/event/15/contributions/644/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/644/
END:VEVENT
BEGIN:VEVENT
SUMMARY:New information on the strong isospin symmetry breaking in the rea
 ctions of the a0(980) and f0(980) resonance production
DTSTART;VALUE=DATE-TIME:20190227T030000Z
DTEND;VALUE=DATE-TIME:20190227T032000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-663@indico.inp.nsk.su
DESCRIPTION:Speakers: Georgii Shestakov (Sobolev Institute for Mathematics
 )\, Nikolay Achasov (Sobolev Institute for Mathematics)\nThe strong isospi
 n symmetry breaking is discussed as a tool for studying the production mec
 hanisms and nature of light scalar mesons. The review considers various re
 actions in which it can be detected and in which the mixing of a00(980) an
 d f0(980) resonances that breaks the isotopic invariance due to the mass d
 ierence of K+ and K0 mesons has already been observed experimentally.\n\nh
 ttps://indico.inp.nsk.su/event/15/contributions/663/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/663/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The updated status of the pseudoscalar glueball studies
DTSTART;VALUE=DATE-TIME:20190227T022000Z
DTEND;VALUE=DATE-TIME:20190227T024000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-670@indico.inp.nsk.su
DESCRIPTION:Speakers: Qiang Zhao (Institute of High Energy Physics\, Chine
 se Academy of Sciences)\nThe present theoretical and experimental status o
 f the pseudoscalar glueball studies will be reviewed. We'd show that a con
 verged picture from both theoretical and experimental evidences does not s
 upport the eta(1405) to be the so-far broadly quoted pseudoscalar glueball
  candidate.\n\nhttps://indico.inp.nsk.su/event/15/contributions/670/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/670/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Strange Light Resonances
DTSTART;VALUE=DATE-TIME:20190227T032000Z
DTEND;VALUE=DATE-TIME:20190227T034000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-690@indico.inp.nsk.su
DESCRIPTION:Speakers: Jose Pelaez (Universidad Complutense de Madrid)\nI w
 ill review recent work on the determination of strange resonance parameter
 s from meson-meson scattering data\, using dispersion relations and other 
 techniques based on analytic properties of amplitudes. Although I will dis
 cuss resonances below 1.7 GeV\, I will pay particular attention to the lig
 htest strange resonance K*(800) or kappa meson and the dispersive determin
 ation of its existence and its pole paramters as well as its possible non-
 ordinary nature.\n\nhttps://indico.inp.nsk.su/event/15/contributions/690/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/690/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Meson Decay Studies from MAMI A2
DTSTART;VALUE=DATE-TIME:20190227T034000Z
DTEND;VALUE=DATE-TIME:20190227T040000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-694@indico.inp.nsk.su
DESCRIPTION:Speakers: Lena Heijkenskjöld (Institut für Kernphysik\, Joha
 nnes Gutenberg Universität Mainz)\nDecays of the light mesons $\\pi^0\\$\
 , $\\eta$\, $\\omega$\, and $\\eta'$ provide a unique laboratory to test f
 undamental aspects of hadron physics. Precision studies of such diverse to
 pics as the light quark mass ratio\, $\\pi-\\pi$ scattering lengths\, and 
 searches for physics beyond the Standard Model are possible. Additionally\
 , their Dalitz decays provide a way of measuring the electromagnetic meson
  Transition Form Factors (TFFs) in the time-like region. Precise knowledge
  of pseudoscalar TFFs is vital for the precision frontier of the Standard 
 Model as they are needed as experimental input in calculations of the hadr
 onic Light-by-Light contribution to the anomalous magnetic moment of the m
 uon.\n\n\nThe A2 tagged photon facility at the Mainz Microtron (MAMI) prov
 ides a high yield of light mesons produced by photo-induced reactions on p
 rotons. It makes the experiment ideal for high precision measurements of m
 eson decays. The experimental setup utilises the Bremsstrahlung distributi
 on of the A2 photon beam\, produced from the MAMI electron beam\, along wi
 th a system of detectors that nearly covers the full solid angle.\n\n\nThi
 s talk will highlight the recent contributions as well as ongoing studies 
 by the A2 collaboration in the field of light meson interactions.\n\nhttps
 ://indico.inp.nsk.su/event/15/contributions/694/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/694/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Semileptonic D0 and D+ decays as a probe of the a0(980) nature
DTSTART;VALUE=DATE-TIME:20190227T024000Z
DTEND;VALUE=DATE-TIME:20190227T030000Z
DTSTAMP;VALUE=DATE-TIME:20260718T054634Z
UID:indico-contribution-89-696@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexey Kiselev (Sobolev Institute for Mathematics)\n
 The decays $D^0\\to d\\bar u\\\,e^+\\nu\\to a^-_0(980)\\\,\ne^+\\nu\\to\\p
 i^-\\eta\\\, e^+\\nu$ and $D^+\\to d\\bar d\\\,e^+\\nu\\to\na^0_0(980)\\\,
  e^+\\nu\\to\\pi^0\\eta\\\, e^+\\nu$ (and the charge\nconjugated ones) are
  the direct probe of the constituent two-quark\ncomponents in the $a^\\pm_
 0(980)$ and $a^0_0(980)$ wave functions.\nRecent BESIII experiment is the 
 first step in experimental study\nof these decays. We suggest adequate for
 mulas for the data\nanalysis and present a variant of $\\eta\\pi$ invarian
 t mass\ndistribution when $a_0(980)$ has no constituent two-quark\ncompone
 nt at all.\n\nhttps://indico.inp.nsk.su/event/15/contributions/696/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/696/
END:VEVENT
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