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SUMMARY:Off-shell fermion  polarization and t-quark production
DTSTART;VALUE=DATE-TIME:20190301T090000Z
DTEND;VALUE=DATE-TIME:20190301T092000Z
DTSTAMP;VALUE=DATE-TIME:20260310T092210Z
UID:indico-contribution-94-613@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexander Kaloshin (Irkutsk State University)\nStand
 ard calculation of polarization of final electron for pure initial state m
 ay be reformulated as a problem of looking for the complete  polarization 
 axis of produced state. In this problem the scattering amplitude is used (
 instead of its square in standard approach) and it gives method for calcul
 ation  of  polarization applicable for both final and intermediate state f
 ermions. For this purpose it is convenient to use  fermion propagator (bar
 e or dressed) in form of spectral representation\,  which is based on eige
 nvalue problem and gives the system of orthogonal off-shell energy  projec
 tors.\n \n   These two poins together: (i) problem of looking for the comp
 lete  polarization axis and (ii) spectral representation of fermion propag
 ator allow to give a corrrect definition for polarization of intermediate 
 fermion.\n\n   Most interesting is the case of fermion resonance (i.e. dre
 ssed propagator) in theory with P-parity violation. Corresponding the ener
 gy projection operators  differ from the standard off-shell projectors and
  also contain $\\gamma^{5}$. Moreover\, in such theory the standard spin p
 rojectors do not commute with propagator and also should be modified.\n\n 
   The obtained projectors are used to give the most accurate parametrizati
 on of t-quark resonance curve and simultaneously for its off-shell polariz
 ation.\n\nhttps://indico.inp.nsk.su/event/15/contributions/613/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/613/
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SUMMARY:A review of present experimental status of the K -> pi nu nubar de
 cays at the NA62
DTSTART;VALUE=DATE-TIME:20190301T084000Z
DTEND;VALUE=DATE-TIME:20190301T090000Z
DTSTAMP;VALUE=DATE-TIME:20260310T092210Z
UID:indico-contribution-94-628@indico.inp.nsk.su
DESCRIPTION:Speakers: Artur Shaikhiev (Institute for Nuclear Research RAS)
 \nA review of present experimental status of the K -> pi nu nubar\ndecays 
 is given in the talk. The NA62 experiment at CERN SPS is\ndesigned to meas
 ure the branching ratio of the K+ -> pi+ nu nubar\nusing a novel kaon deca
 y-in-flight technique\, while the KOTO\nexperiment at JPARC aims to study 
 the KL -> pi0 nu nubar decay.\nBoth experiments produced new results in 20
 18. The NA62\nexperiment observed one candidate event\, compatible with th
 e\nStandard Model prediction. The KOTO experiment improved the\nexisting u
 pper limits on the branching ratio of the neutral kaon\ndecay by an order 
 of magnitude.\n\nhttps://indico.inp.nsk.su/event/15/contributions/628/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/628/
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SUMMARY:Recent results on Kaon Physics at KLOE-2
DTSTART;VALUE=DATE-TIME:20190228T083000Z
DTEND;VALUE=DATE-TIME:20190228T085000Z
DTSTAMP;VALUE=DATE-TIME:20260310T092210Z
UID:indico-contribution-94-660@indico.inp.nsk.su
DESCRIPTION:Speakers: Alessandro Di Cicco (Roma Tre Univeristy)\nKLOE-2 ex
 tends the physics program of the forerunner KLOE experiment\, especially i
 n the\nfield of discrete symmetries tests with neutral kaons. KLOE and KLO
 E-2 have collected\ntogether the largest sample of electron-positron colli
 sions at an energy equal to the φ-meson\nmass\, corresponding to about $2
 .4×10^{10}$ produced φ mesons.\n\nIn this talk I will review the latest 
 results on neutral kaon physics at KLOE together with the\nstatus and pros
 pects of the analyses of KLOE-2 data. I will report about a new measuremen
 t\nof the charge asymmetry in $K_S$ semileptonic decays with 1.7 fb$^{-1}$
  of KLOE data\, which\nimproves the sensitivity of previous measurements o
 f about a factor two. Furthermore\, I\nwill discuss the status of the anal
 ysis devoted to directly test T and CPT symmetries in\nneutral kaons trans
 itions\, as well as the search of the pure CP-violating $K_S → 3\\pi^0$ 
 decay\nusing part of the recently acquired KLOE-2 dataset.\n\nhttps://indi
 co.inp.nsk.su/event/15/contributions/660/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/660/
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BEGIN:VEVENT
SUMMARY:Charmed mesons and baryons at LHCb
DTSTART;VALUE=DATE-TIME:20190301T081000Z
DTEND;VALUE=DATE-TIME:20190301T084000Z
DTSTAMP;VALUE=DATE-TIME:20260310T092210Z
UID:indico-contribution-94-679@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexey Dzyuba (B.P. Konstantinov Petersburg Nuclear 
 Physics Institute National Research Center "Kurchatov Institute")\nLHCb co
 llected a world-leading sample of charmed baryons during LHC's Run 1 (2010
 -2012) and Run 2 (2015-2018). With this data set\, LHCb is discovering man
 y previously unobserved charmed states and making the most precise determi
 nations of the properties of known states. LHCb's latest results on charme
 d baryons are presented.\n\nhttps://indico.inp.nsk.su/event/15/contributio
 ns/679/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/679/
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SUMMARY:Open Charm Physics at BESIII
DTSTART;VALUE=DATE-TIME:20190301T073000Z
DTEND;VALUE=DATE-TIME:20190301T075000Z
DTSTAMP;VALUE=DATE-TIME:20260310T092210Z
UID:indico-contribution-94-687@indico.inp.nsk.su
DESCRIPTION:Speakers: Peter Weidenkaff (Institut fuer Kernphysik\, Mainz)\
 nThe BESIII experiment at the BEPCII collider analyses $e^+e^−$ collisio
 ns in\nthe charmonium region. The accessible energy range covers several c
 harm related thresholds\, such as $D\\bar{D}\, D_sD_s^*$. BESIII has recor
 ded large samples at\nthose energies and the special topology of quantum-c
 orrelated pairs of D decays\nserves as ideal laboratory for the study of c
 harm decays.\n\nIn this talk we present recent results from the analysis o
 f $D^0$ \, $D^+$ and $D_s$ decays. In particular\, the measurement of form
 -factors and decay constants using\nleptonic and semi-leptonic final state
 s and results from partial-wave analyses\nand branching fraction measureme
 nts of hadronic final states.\n\nhttps://indico.inp.nsk.su/event/15/contri
 butions/687/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/687/
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SUMMARY:Open charm studies at Belle
DTSTART;VALUE=DATE-TIME:20190301T075000Z
DTEND;VALUE=DATE-TIME:20190301T081000Z
DTSTAMP;VALUE=DATE-TIME:20260310T092210Z
UID:indico-contribution-94-702@indico.inp.nsk.su
DESCRIPTION:Speakers: Valentina Zhukova (LPI)\nUntil recently\, parameters
  of vector charmonia lying above the open-charm threshold were determined 
 from the inclusive cross section of the electron-positron annihilation to 
 hadronic final states. However\, the parameters of the resonances obtained
  this way are model-dependent and they suffer from large uncertainties. On
  the other hand\, measurements of exclusive cross sections of the e^+e^- a
 nnihilation to charm hadrons should provide important missing information 
 about strong interaction in this region so that the results of such measur
 ements are of large interest both for developments of experimental methods
 \, and theory.\nIn particular\, the aforementioned measurements should she
 d light on the nature on the charminium states with quantum numbers 1−
 −\, which are not fully understood yet. Determination of the masses and 
 widths of these resonances in a model-independent way and extraction of th
 eir coupling constant to elastic open-charm channels will allow to obtain 
 information on the wave functions of the vector charmonia and to verify th
 e phenomenological models for heavy hadrons.\nNew results are obtained for
  the exclusive cross sections of the e+e− annihilation into charmed hadr
 on pairs with initial state radiation. The analysis is based on the data s
 ample collected with the Belle detector with the integrated luminosity of 
 951 fb−1. The accuracy of the cross section measurement is increased by 
 a factor of 2 compared with the previous Belle study and\, for the first t
 ime\, the e+e−→D∗D∗ cross section is decomposed into three compone
 nts corresponding to different helicities of the D∗’s in the final sta
 te.\n\nhttps://indico.inp.nsk.su/event/15/contributions/702/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/702/
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