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BEGIN:VEVENT
SUMMARY:Early universe first order phase transition due to the composite H
iggs boson dynamics in the soft-wall holographic model
DTSTART;VALUE=DATE-TIME:20220730T151800Z
DTEND;VALUE=DATE-TIME:20220730T153000Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-327@mosphys.ru
DESCRIPTION:Speakers: Andrey Shavrin (Saint Petersburg State University)\n
The composite Higgs model assume that the Higgs field arises as the pseudo
-Goldstone mode corresponding to a dynamical symmetry breaking in a new st
rongly coupled sector. We present the soft-wall holographic model where su
ch symmetry breaking occurs as a first order phase transition. In this cas
e the bubble nucleation in the early universe becomes possible. To study t
he homogeneous solutions in the models of this type we present the perturb
ation theory approach.\n\nhttps://rich2018.org/indico/event/6/contribution
s/327/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/327/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The DUNE experiment PRISM method for data-driven predictions
DTSTART;VALUE=DATE-TIME:20220730T150600Z
DTEND;VALUE=DATE-TIME:20220730T151800Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-337@mosphys.ru
DESCRIPTION:Speakers: Anna Stepanova ()\nMixing matrix parameters in a lep
ton sector are expected to be measured precisely by the next-generation ex
periments. One of them is an accelerator deep underground neutrino experim
ent DUNE\, which will have a wide physics program in particular neutrino o
scillations. Its main goal is to determine the neutrino mass hierarchy\,
the charge-parity phase $\\delta_{\\text{CP}}$ and the octant of mixing an
gle $\\theta_{23}$. DUNE will consist of near and far detector complexes.
The last one will measure neutrino spectra after oscillations. The near de
tector system will be used for controlling the systematic uncertainties. T
wo detectors of the near complex\, LAr and GAr\, will be able to move perp
endicular on 33 m long to the beam axis and make precision reaction-indep
endent spectrum measurements. Such design is named as DUNE PRISM and is un
ique relative to other existing experiments. \nDUNE PRISM methods using a
linear combination of near detector off-axis measurements are able to cre
ate far detector oscillated predictions without dependence on the model of
neutrino interactions and fluxes. These uncertainties can unfold a bias o
f the far detector spectrum that effects directly on the experiment sensit
ivity to the oscillation parameters.\n\nhttps://rich2018.org/indico/event/
6/contributions/337/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/337/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Study of the $\\omega \\to \\pi^{0}e^{+} e^{-}$ conversion decay w
ith the CMD-3 detector at VEPP-2000 collider
DTSTART;VALUE=DATE-TIME:20220730T145400Z
DTEND;VALUE=DATE-TIME:20220730T150600Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-308@mosphys.ru
DESCRIPTION:Speakers: Bogdan Kutsenko (Budker Institute of Nuclear Physics
(RU))\nMeasurements of the branching ratios of conversion decays are nece
ssary to test the vector dominance model and estimate the background in th
e study of quark-gluon plasma. An important source of information about th
e physical processes occurring in a quark-gluon plasma is the production o
f dileptons\, in particular\, the production of electron-positron pairs. I
n experiments\, the measured number of lepton pairs exceeds the theoretica
lly predicted one. One of the main contributions to background events in t
he analysis of dilepton spectrum is the conversion decays of vector mesons
. In particular\, $\\omega$ meson decay into $\\pi^{0}e^{+}e^{-}$ should b
e taken into account.\nThe study of the conversion decay $ \\omega \\right
arrow \\pi^{0}e^{+} e^{-} $ in the decay channel $\\pi^{0} \\rightarrow \\
gamma \\gamma$ was performed with the CMD-3 detector at the VEPP-2000 $e^
{+} e^{-}$ collider at the BINP in Novosibirsk. The analysis uses the data
collected at the сenter of mass energy range 660 MeV -- 840 MeV with tot
al integrated luminosity of about 10 1/pb.\nThe main background processes
are $\\pi^{0}\\pi^{+}\\pi^{-}$ events\, QED events\, and $\\pi^{0}\\gamma$
decay events\, when a monochromatic photon is converted into $e^{+} e^{-}
$ pair on the material before the sensitive volume of the detector. To sup
press the latter type of background\, a deep neural network was used. The
efficiencies of photons reconstruction\, trigger\, reconstruction of close
tracks\, and neural network application were calculated. The Born cross-s
ection of the process under study was measured in the range 660 MeV -- 840
MeV and a preliminary result was obtained for the branching ratio of $\\o
mega \\to \\pi^{0}e^{+}e^{-}$. The result is twice more precise than any p
revious measurements.\n\nhttps://rich2018.org/indico/event/6/contributions
/308/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/308/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Searches for the light invisible hypothetic pseudoscalar in the [K
+ --> pi^{+} pi^{0} P] decay at the OKA setup
DTSTART;VALUE=DATE-TIME:20220730T144200Z
DTEND;VALUE=DATE-TIME:20220730T145400Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-312@mosphys.ru
DESCRIPTION:Speakers: Artem Okhotnikov (NRC KI - IHEP)\nSearches for the l
ight invisible hypothetic pseudoscalar in the decay $K^+\\rightarrow\\pi^{
+}\\pi^{0}P$ are performed for two alternative scenarios\, namely for the
pseudoscalar sgoldstino and for the axion. We analysed the data taken from
the "OKA" detector in 2018. The setup uses 18 GeV/c RF separated beam of
the U-70 proton synchrotron.\nNo signal is observed\, the upper limits for
the branching ratio of the decay are derived for both scenarios. \nThe 90
% CL upper limit for the case of sgoldstino is estimated to be in the regi
on $3\\cdot10^{-5}$ to $2\\cdot10^{-6}$ depending on the sgoldsino mass f
rom 40 to 200 MeV. The upper limit for the axion is changing from $2\\cdot
10^{-5}$ to $2.5\\cdot10^{-6}$ for the axion mass range from 20 to 200 MeV
.\n\nhttps://rich2018.org/indico/event/6/contributions/312/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/312/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Revisiting PS191 limits on sterile neutrinos
DTSTART;VALUE=DATE-TIME:20220730T143000Z
DTEND;VALUE=DATE-TIME:20220730T144200Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-339@mosphys.ru
DESCRIPTION:Speakers: Igor Krasnov (INR RAS)\nWe perform Monte Carlo simul
ations of the sterile neutrino signal at the fixed target experiment PS191
operated on a proton beam of 19.2GeV at CERN in the eighties. We find tha
t the strongest bounds the PS191 could obtain are significantly lower than
what they published\, and now are obsolete being surpassed by recent T2K\
, NA62\, E949\, TRIUMF and PIENU experiments.\n\n(Based on arXiv:2112.0680
0.)\n\nhttps://rich2018.org/indico/event/6/contributions/339/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/339/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Monte-Carlo studies of heavy sterile neutrino from Ds+ decay
DTSTART;VALUE=DATE-TIME:20220730T140600Z
DTEND;VALUE=DATE-TIME:20220730T141800Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-336@mosphys.ru
DESCRIPTION:Speakers: Kirill Ivanov (MIPT)\nStandard Model of high energy
physics is very successful\, but neutrino sector is not completely accommo
dated into it (e.g. neutrino oscillations). One of the possible solution i
s introduction of heavy sterile neutrino\, which does not have any flavour
and interacts with only flavour SM neutrinos via oscillations. \n\nIn thi
s talk studies of heavy sterile neutrino N is presented\, where neutrino o
riginates from $D_s^+$ decay\, namely $D_s^+ \\to \\mu^+ N \\to \\mu^+ \\m
u^+ \\pi^-$. Origin of $D_s^+$ mesons are semileptonic decays $B_s^0 \\to
D_s^+ \\mu^- \\mu_\\nu$. Studies are provided using Monte-Carlo simulation
samples with CMS detector at CERN Run-2 conditions (proton-proton collisi
ons with $\\sqrt{s} = 13$ TeV). Full simulation (Pythia + EvtGen + Photos
+ Geant4) is provided\, as well as the full reconstruction of the simulate
d decay. Several points on ($m_N\, V_{N\\mu}$) plane are generated for the
sterile neutrino properties\, where $m_N$ and $V_{N\\mu}$ are the expecte
d mass of N and coupling parameter with mass. We provide studies of kinema
tic and topological variables of the involved particles\, reconstruction e
fficiencies in dependence of N properties\, detector resolution and select
ion criteria\, fit functions etc. \n\nThe obtained results and estimated s
ensitivity in ($m_N\, V_{N\\mu}$) plane will be used for the future search
for this decay and heavy sterile neutrino\, using real CMS Experiment dat
a.\n\nhttps://rich2018.org/indico/event/6/contributions/336/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/336/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Measurements of gluon fusion and vector-boson-fusion production of
the Higgs boson in H→WW∗→eνμν decays using pp collisions at √s
=13 TeV with the ATLAS detector
DTSTART;VALUE=DATE-TIME:20220730T135400Z
DTEND;VALUE=DATE-TIME:20220730T140600Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-331@mosphys.ru
DESCRIPTION:Speakers: Alexander Gavrilyuk (ITEP)\nThe gluon fusion and vec
tor-boson-fusion Higgs boson production modes are measured using proton--p
roton collisions in the $H\\rightarrow W W^* \\rightarrow e\\nu \\mu\\nu$
decay channel. The Large Hadron Collider delivered proton-proton collision
s at a centre-of-mass energy of 13 TeV between 2015 and 2018 which were re
corded by the ATLAS detector\, corresponding to an integrated luminosity o
f 139 fb$^{-1}$. The products of the total gluon fusion and vector-boson-f
usion cross sections times the $H\\rightarrow W W^*$ branching fraction ar
e respectively measured to be $12.4\\pm1.5~\\mathrm{pb}$ and $0.79\\\;^{+
0.19}_{-0.16}~\\mathrm{pb}$\, in agreement with Standard Model predictions
. Higgs boson production is further characterised through measurements of
Simplified Template Cross Sections in a total of 11 kinematical fiducial r
egions.\n\nhttps://rich2018.org/indico/event/6/contributions/331/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/331/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Measurement of the T-odd correlation in the K+ --> e^{+} nu pi^{0}
gamma radiative decay at OKA setup
DTSTART;VALUE=DATE-TIME:20220730T134200Z
DTEND;VALUE=DATE-TIME:20220730T135400Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-317@mosphys.ru
DESCRIPTION:Speakers: Ilia Tiurin (NRC KI - IHEP)\nMeasurements of the T-o
dd correlation in the K+ --> e^{+} nu pi^{0} gamma radiative\ndecay are pe
rformed at the "OKA" detector exposed to 18 GeV/c RF separated beam of\nth
e U-70 PS. About 100K events of the decay are selected with a background o
f 15%.\nThe measured correlation ksi is a mixed product of the e^{+}\, pi^
{0} and gamma\nmomenta in the kaon rest frame\, normalised to M_{K}^{3}. F
or the estimate of the T-\nodd asymmetry a variable A_ksi = N_{+}-N_{-} /
N_{+}+N_{-}\, where N_{+-} is the\nnumber of events with ksi > (\n\nhttps:
//rich2018.org/indico/event/6/contributions/317/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/317/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Energy reconstruction with machine learning techniques in JUNO: ag
gregated features approach
DTSTART;VALUE=DATE-TIME:20220730T133000Z
DTEND;VALUE=DATE-TIME:20220730T134200Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-325@mosphys.ru
DESCRIPTION:Speakers: Arsenii Gavrikov (HSE\, JINR)\nThe Jiangmen Undergro
und Neutrino Observatory (JUNO) is a neutrino experiment under constructio
n with a broad physics program. The main goals of JUNO are the determinati
on of the neutrino mass ordering and the high precision measurement of neu
trino oscillation properties. High quality reconstruction of reactor neutr
ino energy is crucial for the success of the experiment.\n\nThe JUNO detec
tor is equipped with a huge number of photomultiplier tubes (PMTs) of two
types: 17 612 20-inch PMTs and 25 600 3-inch PMTs. The detector is designe
d to provide an energy resolution of 3% at 1 MeV. Compared to traditional
reconstruction methods\, Machine Learning (ML) is significantly faster for
the detector with so many PMTs. \n\nIn this work we studied ML approaches
for energy reconstruction from the signal gathered by the PMT array and p
resented fast models using aggregated features: fully connected deep neura
l network and boosted decision trees. The dataset for training and testing
is generated with full simulation using the official JUNO software.\n\nht
tps://rich2018.org/indico/event/6/contributions/325/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/325/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The cosmological signature of light sgoldstino: gravitational wave
s from electroweak phase transition
DTSTART;VALUE=DATE-TIME:20220728T173600Z
DTEND;VALUE=DATE-TIME:20220728T174800Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-309@mosphys.ru
DESCRIPTION:Speakers: Ekaterina Kriukova (Moscow State University)\nNowada
ys the supersymmetic models are widely used to extend the Standard Model.
In some realistic ones the supersymmmetry is spontaneously violated at ene
rgies of order 1 TeV. This fact is effectively described by a chiral sgold
stino multiplet consisting of a Goldstone fermion\, goldstino\, a scalar s
goldstino and an auxiliary field with a none-zero vev.\nIn the paper 2112.
06083 we consider light sgoldstinos with mass about 100 GeV. Other superpa
rtners are much heavier\, so they are not active at the electroweak scale.
Being the additional scalar degrees of freedom\, light sgoldstinos contri
bute to the effective potential at a finite temperature.\nWe study the pos
sibility of the first-order electroweak phase transition (EWPT) due to thi
s contribution and search for region in the model parameter space where th
e EWPT takes place. Using the packages PhaseTracer and FindBounce we have
found several points with EWPT at temperatures 60-140 GeV. We also estimat
e the spectra of gravitational waves produced during the EWPT. The predict
ed signals can be observed by LISA\, BBO and DECIGO experiments.\n\nhttps:
//rich2018.org/indico/event/6/contributions/309/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/309/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum chaos in nonlinear vector mechanics
DTSTART;VALUE=DATE-TIME:20220728T172400Z
DTEND;VALUE=DATE-TIME:20220728T173600Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-326@mosphys.ru
DESCRIPTION:Speakers: Dmitrii Trunin (MIPT & ITEP)\nOut-of-time ordered co
rrelation functions (OTOCs) are widely used as a diagnostic of quantum cha
os and allow one to estimate the quantum Lyapunov exponent\, which reprodu
ces classical Lyapunov exponent in the semiclassical limit. However\, in m
ost cases\, OTOCs and quantum Lyapunov exponent are calculated numerically
. We consider nonlinear vector mechanics with a broken $O(N)$ symmetry\, w
hich exhibits a chaotic behavior in classical case\, and analytically calc
ulate the quantum Lyapunov exponent summing the ladder diagrams in the lar
ge-$N$ limit. Furthermore\, we explicitly show that in the high-temperatur
e limit\, quantum exponent reproduces the classical one.\n\nhttps://rich20
18.org/indico/event/6/contributions/326/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/326/
END:VEVENT
BEGIN:VEVENT
SUMMARY:On the one loop effective action in 6D N=(1\,0) hypermultiplet sel
f-coupling model
DTSTART;VALUE=DATE-TIME:20220728T171200Z
DTEND;VALUE=DATE-TIME:20220728T172400Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-316@mosphys.ru
DESCRIPTION:Speakers: Alexandra Budekhina (Tomsk state pedagogical univers
ity)\nWe study the six-dimensional ${\\cal N=(1\,0)}$ supersymmetric model
of\ninteracting gauge multiplet and hypermultiplet with arbitrary\nself-c
oupling. Using the background field method in the harmonic\nsuperspace\,
we calculate the divergent part of the one-loop\neffective action and disc
uss the possible finite contribution to the\nlow-energy effective action.
We demonstrate that the one-loop\ndivergences do not vanish even in the ca
se of the on-shell\nbackground superfields.\n\nhttps://rich2018.org/indico
/event/6/contributions/316/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/316/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gravitational chiral anomaly for fields with spin 3/2 in the Rarit
a-Schwinger-Adler theory
DTSTART;VALUE=DATE-TIME:20220728T170000Z
DTEND;VALUE=DATE-TIME:20220728T171200Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-319@mosphys.ru
DESCRIPTION:Speakers: George Prokhorov (Joint Institute for Nuclear Resear
ch\, Dubna\, Russia)\nWe find the gravitational chiral anomaly for spin 3/
2 fields in the framework of the new theory proposed by S. L. Adler. This
anomaly differs by -19 times from the anomaly for Dirac field. Adler's the
ory includes Rarita-Schwinger fields and an additional field with spin 1/2
\, interaction with which allows solving the well-known problem with the c
onstruction of a quantum-field perturbation theory.\n\nhttps://rich2018.or
g/indico/event/6/contributions/319/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/319/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Generalized method of symmetric embeddings construction and its ap
plication to spacetimes of general relativity
DTSTART;VALUE=DATE-TIME:20220728T150600Z
DTEND;VALUE=DATE-TIME:20220728T151800Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-329@mosphys.ru
DESCRIPTION:Speakers: Mikhail Markov (MSU)\nIt can be shown that an arbitr
ary (pseudo) Riemannian manifold can be considered as a surface in a flat
space of a larger number of dimensions. This approach\, for example\, lead
s to a modified theory of gravity -- the embedding theory. However\, the c
onstruction of explicit embeddings in a flat space is a nontrivial task th
at can be reformulated as the solution of a system of nonlinear partial di
fferential equations. The method that will be presented in this report can
be used to simplify the construction of explicit embeddings for spaces wi
th abelian symmetry\, and in some cases\, to construct an explicit embeddi
ng completely. It will be shown how this method allows us to construct exp
licit embeddings of manifolds of (2+1) dimensional gravity: a BTZ black ho
le with angular momentum and a magnetic monopole.\n\nhttps://rich2018.org/
indico/event/6/contributions/329/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/329/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Formation of primordial black holes after Starobinsky inflation wi
th single field model
DTSTART;VALUE=DATE-TIME:20220728T145400Z
DTEND;VALUE=DATE-TIME:20220728T150600Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-323@mosphys.ru
DESCRIPTION:Speakers: Daniel Frolovsky (Tomsk State University)\nWe adapte
d the Appleby-Battye-Starobinsky (ABS) model of $F(R)$-gravity towards des
cribing\ndouble cosmological inflation and formation of primordial black h
oles with masses up to $10^{19}\ng$ in the single-field model. Masses of
primordial black holes in this model are beyond the Hawking limit $10
^{15} g$\, and this allows us to assert that primordial black holes can f
orm a part of cold dark matter. Our results agree with the current measure
ments of cosmic microwave background radiation within $3\\sigma$\, but req
uire fine-tuning of the parameters.\n\nhttps://rich2018.org/indico/event/6
/contributions/323/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/323/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Extended Chern–Simons Model for a Vector Multiplet
DTSTART;VALUE=DATE-TIME:20220728T144200Z
DTEND;VALUE=DATE-TIME:20220728T145400Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-320@mosphys.ru
DESCRIPTION:Speakers: Oleg Nosyrev ()\nWe consider a gauge theory of vecto
r fields in 3D Minkowski space. At the free level\, the dynamical variable
s are subjected to the extended Chern–Simons (ECS) equations with higher
derivatives. If the color index takes n values\, the third-order model ad
mits a 2n-parameter series of second-rank conserved tensors\, which includ
es the canonical energy–momentum. Even though the canonical energy is un
bounded\, the other representatives in the series have a bounded from belo
w the 00-component. The theory admits consistent self-interactions with th
e Yang–Mills gauge symmetry. The Lagrangian couplings preserve the energ
y–momentum tensor that is unbounded from below\, and they do not lead to
a stable non-linear theory. The non-Lagrangian couplings are consistent w
ith the existence of a conserved tensor with a 00-component bounded from b
elow. These models are stable at the non-linear level. The dynamics of int
eracting theory admit a constraint Hamiltonian form. The Hamiltonian densi
ty is given by the 00-component of the conserved tensor. In the case of st
able interactions\, the Poisson bracket and Hamiltonian do not follow from
the canonical Ostrogradski construction. Particular attention is paid to
the “triply massless” ECS theory\, which demonstrates instability even
at the free level. It is shown that the introduction of extra scalar fiel
d\, serving as Higgs\, can stabilize the dynamics in the vicinity of the l
ocal minimum of energy. The equations of motion of the stable model are no
n-Lagrangian\, but they admit the Hamiltonian form of dynamics with a Hami
ltonian that is bounded from below.\n\nhttps://rich2018.org/indico/event/6
/contributions/320/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/320/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Recent CMS flavor physics results
DTSTART;VALUE=DATE-TIME:20220728T143000Z
DTEND;VALUE=DATE-TIME:20220728T144200Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-313@mosphys.ru
DESCRIPTION:Speakers: Sergey Polikarpov (NRNU MEPhI\, LPI RAS)\nThe recent
CMS results on flavor physics will be discussed\, in particular\, the ful
l Run-2 study of dimuon decays of B0 and B0s mesons.\n\nhttps://rich2018.o
rg/indico/event/6/contributions/313/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/313/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dual formulation for the massless spin 2 theory
DTSTART;VALUE=DATE-TIME:20220728T140600Z
DTEND;VALUE=DATE-TIME:20220728T141800Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-324@mosphys.ru
DESCRIPTION:Speakers: Victoria Abakumova (Tomsk State University)\nWe prop
ose dual representation for the massless spin 2 theory by the third-rank t
ensor field with the hook Young diagram. We start from the linearized syst
em of Einstein equations which includes Nordström equation. Once the line
arized Nordström equation is a topological field theory\, the general sol
ution is a pure gauge. Substituting this general solution into the rest of
Einstein system\, we arrive at the field equations for the hook tensor\,
being the initial gauge parameter for the Nordström equation. The degree
of freedom count confirms that these higher derivative equations describe
massless spin 2 theory. This dual formulation is consistent in any $d\\ge
3$.\n\nhttps://rich2018.org/indico/event/6/contributions/324/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/324/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Canonical description for formulation of embedding gravity as Gene
ral Relativity with additional matter
DTSTART;VALUE=DATE-TIME:20220728T135400Z
DTEND;VALUE=DATE-TIME:20220728T140600Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-330@mosphys.ru
DESCRIPTION:Speakers: Taisiia Zaitseva (Saint Petersburg University)\nThe
work is devoted to the study of canonical formalism for one of the General
Relativity modifications\, the embedding theory. It is known that the emb
edding theory can be rewritten as General Relativity with an additional co
ntribution of matter\, which is called the embedding matter. The canonical
description of such embedding theory is interesting for a better understa
nding of the embedding matter properties point of view. In this paper\, we
calculate all primary and secondary constraints\, obtain the formulation
of the Hamiltonian as a linear combination of constraints\, and discuss th
e classification of the resulting constraints into constraints of the firs
t and second classes. We solve some of the constraints\, then the results
for the considered embedding theory formulation in the form of GR with add
itional matter are compared with the already known results for the pure em
bedding theory.\n\nhttps://rich2018.org/indico/event/6/contributions/330/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/330/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Analytic calculation of some NRQCD master integrals
DTSTART;VALUE=DATE-TIME:20220728T133000Z
DTEND;VALUE=DATE-TIME:20220728T134200Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-340@mosphys.ru
DESCRIPTION:Speakers: Maxim Bezuglov (BLTP JINR)\nThe analytical calculati
on of Feynman integrals is an important problem in modern quantum field th
eory. This task is important both for obtaining the most accurate predicti
ons for observable quantities and for some areas of pure mathematics such
as theory of periods in algebraic geometry. Nevertheless\, it is not alway
s possible to obtain analytical solutions for all Feynman integrals beyond
one loop. All difficulties are usually associated with the appearance of
elliptic or more complex geometric structures which inevitably arise when
taking into account the masses of propagators.\nIn this work\, we use an e
xample of two loop elliptic master integrals arising from non-relativistic
QCD as a laboratory to develop new methods for calculating non-polylogari
thmic Feynman integrals. First of all\, we will consider a new method that
allows to obtain exact\, in terms of the dimensional regularization param
eter\, solutions for the integrals under consideration. In this case\, th
e solutions are expressed in terms of well-converging Frobenius power seri
es. We will also briefly consider a new method for obtaining integral repr
esentations for the same integrals.\n\nhttps://rich2018.org/indico/event/6
/contributions/340/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/340/
END:VEVENT
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SUMMARY:A new method for the measurement of the Michel parameters that des
cribe the daughter muon polarization in the $\\tau^- \\to \\mu^- \\bar{\\n
u}_\\mu\\nu_\\tau$ decay
DTSTART;VALUE=DATE-TIME:20220728T134200Z
DTEND;VALUE=DATE-TIME:20220728T135400Z
DTSTAMP;VALUE=DATE-TIME:20240521T134407Z
UID:indico-contribution-22-310@mosphys.ru
DESCRIPTION:Speakers: Denis Bodrov (Higher School of Economics (HSE))\nThi
s work provides a detailed description of the method for the first direct
measurement of all Michel parameters in the $\\tau^- \\to \\mu^- \\bar{\\n
u}_\\mu\\nu_\\tau$ decay related to the polarization of the daughter muon.
An application of the suggested method in the existing and future experim
ents at $e^+e^-$ colliders is considered. We have performed a feasibility
study for the future Super Charm-Tau Factory and Belle II experiments. For
the first one\, the sensitivity to the Michel parameters $\\xi'$\, $\\xi'
'$\, $\\eta''$\, $\\alpha'/A$\, and $\\beta'/A$ is estimated. For the latt
er\, only one Michel parameter\, $\\xi'$\, for which the sensitivity is ma
ximum\, is considered.\n\nhttps://rich2018.org/indico/event/6/contribution
s/310/
LOCATION:House of International Conferences
URL:https://rich2018.org/indico/event/6/contributions/310/
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