BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Quantum decoherence during inflation
DTSTART;VALUE=DATE-TIME:20200305T184800Z
DTEND;VALUE=DATE-TIME:20200305T190000Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-274@mosphys.ru
DESCRIPTION:Speakers: Arina Shtennikova ()\nDuring inflation the universe
rapidly expands and the observed classical distribution of inhomogeneities
originates from the substantially non-classical state. The problem of tra
nsition from quantum to classical behavior is also important outside the c
osmological context in connection with the study of mesoscopic systems. An
d this problem can be viewed in the context of the theory of decoherence i
nduced by environment. In short\, this phenomenon lies in the fact that th
e quantum degrees of freedom of the system are entangled with the degrees
of freedom of the environment\, which leads to the suppression of interfer
ence effects and the classicalisation of the system.\nIn cosmological cont
ext\, the transition to classical behavior is studied within the Wheeler-D
eWitt approach with small inhomogeneous perturbations considered over quan
tized homogeneous background. The Wheeler-DeWitt equation is solved in the
Born-Oppenheimer approximation. Using this approximation\, one can repres
ent the wave function as a product of homogeneous and inhomogeneous parts.
Inhomogeneous wave function is associated with QFT approach on a clas-sic
al curved background and homogeneous part provides probability amplitude f
or different backgrounds. The decoherence process itself is observed by st
udying the corresponding density matrix.\nIn this paper we discuss the dec
oherence of background degrees of freedom due to the loss of information a
bout modes going beyond the cosmological horizon while mantaining the full
information about the short wavelength perturbations. We demonstrate the
classicalization process of the quantum state of inhomogeneities of the un
iverse by observing reduced density matrix of the short wavelength fluctua
tions.\n\nhttps://mosphys.ru/indico/event/5/contributions/274/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/274/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Electromagnetic Stress-Energy tensor in a dispersive medium
DTSTART;VALUE=DATE-TIME:20200305T184800Z
DTEND;VALUE=DATE-TIME:20200305T190000Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-267@mosphys.ru
DESCRIPTION:Speakers: Carlos Heredia Pimienta (University of Barcelona)\nT
he main purpose of this work is to obtain the Electromagnetic Stress-Energ
y Tensor in a medium for a nonlocal theory. In order to get it\, we genera
lise Minkowski electrodynamics to dispersive media. As a consequence of th
is generalisation\, the Lagrangian density becomes non-local due to the no
n-local dependencies of the magnetic permeability and electric permittivit
y. This leads a convolution product in the Lagrangian where the field at p
oint 'x' depends on the values of the field at any point in spacetime. The
n\, we derive the field equations and\, applying the Noether's theorem\, t
he conserved energy-momentum tensor. Because non-local Lagrangians are sel
dom found in textbooks\, we devote a non-local formalism to outline the de
rivation of the field equations and Noether's theorem. For that\, the proc
edure is the following: First\, the non-local Lagrangian is converted into
an infinite order Lagrangian (that depends on derivatives of the field of
any order). Then\, the equations of motion and Noether's theorem are deri
ved as though it was an order-n Lagrangian. Finally\, we extend n to infin
ite and the outcomes that appear contain formal series that can be summed
by the techniques that we have developed. To conclude\, we study the obtai
ned Belinfante Stress-Energy Tensor for plane wave solutions for a dispers
ive medium.\n\nhttps://mosphys.ru/indico/event/5/contributions/267/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/267/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Loop corrections in Schwarzschild black hole background
DTSTART;VALUE=DATE-TIME:20200305T184800Z
DTEND;VALUE=DATE-TIME:20200305T190000Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-290@mosphys.ru
DESCRIPTION:Speakers: Prokopy Anempodistov (ITEP\, NRNU MEPhI)\nWhen quant
izing theory in curved space-time\, one can define vacuum state with respe
ct to different timelike Killing vectors. In case of Schwarzschild space-t
ime one usually considers Boulware\, Unruh and Hartle-Hawking vacua\, wher
e the latter two use Kruskal null coordinates to define positive-frequency
modes. Loop corrections to the occupation numbers and anomalous quantum a
verages are considered for scalar particles and it is shown that there are
no corrections up to second order in coupling constant for Boulware and H
artle-Hawking vacua\, but there are non-zero contributions in case of Unru
h vacuum.\n\nhttps://mosphys.ru/indico/event/5/contributions/290/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/290/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stimulated Recovery of the Radiation Damage in Lead Tungstate Crys
tals
DTSTART;VALUE=DATE-TIME:20200305T184800Z
DTEND;VALUE=DATE-TIME:20200305T190000Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-285@mosphys.ru
DESCRIPTION:Speakers: Pavel Orsich (Justus Liebig University)\nThe lead tu
ngstate crystal (PbWO4\, PWO) is one of the widely used scintillation mate
rials for electromagnetic calorimeters in high energy physics experiments.
The degradation of the optical transmittance in the range of the luminesc
ence spectrum under ionizing radiation leads to losses of the light output
resulting in the deterioration of the energy resolution and limiting the
life time of the calorimeter. A possible way to restore radiation damage i
s the in-situ illumination of visible or near infrared light of the whole
crystal volume. It allows to recover the transmittance losses due to the d
epopulation of the color centers. Such kind of stimulated recovery subsyst
em based on a blue light emitting diode is considered for the electromagne
tic calorimeter of the PANDA detector at FAIR (Darmstadt\, Germany). Here
we report on the stimulated recovery studies of the lead tungstate radiati
on damage induced by external light from laser diodes at different wavelen
gths. The level of technological development of laser diodes allows to inc
rease the efficiency of the stimulated recovery.\n\nhttps://mosphys.ru/ind
ico/event/5/contributions/285/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/285/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Notes on quantum fields in Static patch of de Sitter space
DTSTART;VALUE=DATE-TIME:20200305T184800Z
DTEND;VALUE=DATE-TIME:20200305T190000Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-289@mosphys.ru
DESCRIPTION:Speakers: Kirill Bazarov (MIPT)\nWe show the explicit mode exp
ansion of tree-level propagators in Static (or Compact) Patch of de Sitter
space. We construct propagator for thermal state corresponding to arbitra
ry temperature $T$. We show that the propagator that respects the de Sitte
r isometry corresponds to the thermal state with $T = (2 \\pi)^{-1}$ in th
e units of de Sitter curvature. Which confirms the old and well known resu
lt\, making it a bit more explicit. Propagators with $T\\ne(2\\pi)^{-1}$ d
o not respect the isometry. Moreover\, we show that propagators with $T \\
neq (2 \\pi)^{-1}$ have extra singularities on the boundary of the Static
Patch\, as opposed to the case of $T = (2 \\pi)^{-1}$. We discuss physical
meaning of these observations.\nWe also discuss loop corrections to the p
ropagators in the Static patch and their physical meaning both for $T = (2
\\pi)^{-1}$ and $T \\neq (2 \\pi)^{-1}$.\n\nhttps://mosphys.ru/indico/eve
nt/5/contributions/289/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/289/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Generalized unimodular gravity: cospological applications and reno
rmalizeability
DTSTART;VALUE=DATE-TIME:20200305T184800Z
DTEND;VALUE=DATE-TIME:20200305T190000Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-284@mosphys.ru
DESCRIPTION:Speakers: Nikita Kolganov (MIPT and BLTP JINR)\nThe recently s
uggested generalized unimodular gravity theory\, which was originally put
forward as a model of dark energy\, can serve as a model of cosmological i
nflation driven by the effective perfect fluid—the dark purely gravitati
onal sector of the theory. Its excitations are scalar gravitons that can g
enerate\, in the domain free from ghost and gradient instabilities\, the r
ed tilted primordial power spectrum of cosmic microwave background (CMB) p
erturbations matching with observations. The reconstruction of the paramet
ric dependence of the action of the theory in the early inflationary unive
rse is qualitatively sketched from the cosmological data and satisfies the
naturalness criterion—the O(1) magnitude of all its parameters. In part
icular\, the only phenomenological exponentially big parameter—the e-fol
ding factor with N∼60\, leads in this model to a specific expression for
tensor-to-scalar ratio r ≃ 0.004\, matching with the existing observati
onal bounds on r and the CMB spectral index. The alternative possibilities
of generating the cosmological acceleration and possibility of generalize
d renormalizeability of the theory are also discussed.\n\nhttps://mosphys.
ru/indico/event/5/contributions/284/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/284/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A new QFT description of finite duration processes
DTSTART;VALUE=DATE-TIME:20200305T184800Z
DTEND;VALUE=DATE-TIME:20200305T190000Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-254@mosphys.ru
DESCRIPTION:Speakers: Vadim Egorov (SINP MSU)\nCurrently the phenomena of
neutrino and neutral kaon oscillations\, which take place at finite space-
time intervals\, are usually described in the framework of approaches that
are inconsistent or not convenient for describing such processes. We deve
lop a new QFT approach\, adjusting the standard S-matrix formalism for the
case. One applies the usual Feynman rules in the coordinate representatio
n to construct the amplitude of the process and then passes to the momentu
m representation in a way which reflects the experimental setting. Effecti
vely\, it leads to the Feynman propagator in the momentum representation b
eing modified\, while all the other Feynman rules in this representation a
re kept intact. Wave packets are not employed\, we work in the plane wave
approximation\, which simplifies the calculations considerably. The novel
approach allows one to consistently describe unstable particle displaced d
ecay and particle oscillation processes and to successfully reproduce the
well-known results.\n\nhttps://mosphys.ru/indico/event/5/contributions/254
/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/254/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The status of the large-scale coordinate-tracking detector TREK
DTSTART;VALUE=DATE-TIME:20200305T184800Z
DTEND;VALUE=DATE-TIME:20200305T190000Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-273@mosphys.ru
DESCRIPTION:Speakers: Vladislav Vorobyev ()\nThe new large-scale coordinat
e-tracking detector TREK is being developed at National Research Universit
y MEPhI. The aim of the project is the solution of so-called “muon puzzl
e”: the unpredicted by any theory excess of high multiplicity muon bundl
es generated by ultra-high energy primary cosmic rays. The joint operation
with Cherenkov water detector NEVOD will allow investigation specific ene
rgy deposit of quasi-parallel inclined muon bundles generated by high ener
gy cosmic rays in 2000 m3 water volume.\n\nThe detector TREK has an area o
f 250 m2 and it is based on 264 multi-wire drift chambers developed at Ins
titute of High Energy Physics for neutrino experiment at accelerator U-70.
The drift chamber has size 4000×508×112 mm3. TREK will consist of 2 pla
nes (vertical and horizontal) with 132 chambers for each. The total area o
f installation is about 250 m2.\n\nThe drift chambers were tested with a j
oint operation with muon hodoscope URAGAN. Two prototypes of TREK were con
structed\, their operation demonstrated high efficiency of application of
such gaseous detectors for cosmic ray investigations. The experiments on U
RAGAN has allowed us to investigate drift chamber work in different positi
ons\, CTUDC has allowed to test joint work of chambers with NEVOD and prot
otype of TREK has allowed to test multiparticle event reconstruction takin
g into account the relative location of chambers as in TREK installation.\
n\nThree reconstruction methods of multiparticle events have been develope
d. The methods have been tested on experimental data of CTUDC and prototyp
e of TREK. A new reconstruction method based on deep learning is being dev
eloped. Also a time-digital converter based on FPGA Altera Cyclone V is be
ing developed for TREK installation. The report describes the current stat
us of detector TREK.\n\nhttps://mosphys.ru/indico/event/5/contributions/27
3/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/273/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Superfield realization of hidden R-symmetry in extended supersymme
tric gauge theories and its applications
DTSTART;VALUE=DATE-TIME:20200305T183600Z
DTEND;VALUE=DATE-TIME:20200305T184800Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-270@mosphys.ru
DESCRIPTION:Speakers: Viacheslav Ivanovskiy (MIPT)\nAn object of the cruci
al importance in quantum field theory is the effective action. By definiti
on\, it is a generating functional for one-particle irreducible Green's fu
nctions\, which contains complete information about the quantum properties
of this model. To find an effective action\, it is convenient to use the
technique of harmonic superspace.\n\nSuperspace[1] is a generalization of
Minkowski space and allows explicitly and in a simple form to implement su
persymmetry transformations. In theories with extended supersymmetry\, the
concept of harmonic superspace[2] plays an important role\, which allows
one to realize the symmetries of the theory off shell. Its important prope
rty is the presence of an analytic subspace invariant with respect to supe
rsymmetry.\n\nWhen studying $4D\, \\mathcal N = 4$\, and $5D\, \\mathcal N
= 2$ of supersymmetric Yang-Mills theories in harmonic superspace\, some
of the transformations of supersymmetry and\, accordingly\, $R$-symmetry a
re realized hiddenly[3\,4]. The standard approach for obtaining low-energy
effective action is as follows[4\,5]. First\, the leading one-loop quantu
m corrections for to the effective actions of $4D\, \\mathcal N = 2$ and
$5D\, \\mathcal N = 1$ SYM theories are calculated. Then\, by calculating
the expansion of this contribution with respect to hidden supersymmetry\,
expression is obtained for the effective action for $ 4D\, \\mathcal N = 4
$\, and $5D\, \\mathcal N = 2$ theories\, respectively.\n\nIn this paper\,
a different approach is used. The hidden $R$-symmetry transformations was
found. Then\, by calculating the expansion of the leading term with respe
ct to $R$-symmetry\, the expression for the effective action was obtained
. This procedure was applied for $4D\, \\mathcal N = 4$ and $5D\, \\mathc
al N = 2$ SYM theories. The nontrivial result is that the effective action
is not only $R$-symmetric invariant\, but can also be obtained from the r
equirement of the presence of $R$-symmetry.\n\nIt is expected that this ap
proach may be useful in the study of other supersymmetric theories\, for e
xample\, $6D\, \\mathcal N=(2\,0)$ SYM theory.\n\nThis reseerch based on t
he parer[6].\n\nReferences\n1. I. L. Buchbinder\, S. M. Kuzenko. Ideas and
Methods of Supersymmetry and Supergravity or a Walk\nthrough Superspace//
(IOP\, Bristol\, UK\, 1995).\n2. A.S. Galperin\, E.A. Ivanov\, V.I. Ogiev
etsky\, E.S. Sokatchev. Harmonic superspace//Cambridge\, UK: Univ. Pr. (20
01)\n3. I.L. Buchbinder\, E.A. Ivanov \, I.B. Samsonov. Low-energy effecti
ve action in 5D\, N=2\nsupersymmetric gauge theory//Nucl. Phys. B 940 (201
9) 54–62\n4. I. L. Buchbinder\, E. A. Ivanov\, I. B. Samsonov. The Low-E
nergy N=4 SYM Effective Action in Diverse Harmonic Superspaces// Phys. Par
t. Nucl. 48 (3) (2017) 333\n5. I. L. Buchbinder and E. A. Ivanov. Complete
N = 4 structure of low-energy effective action in N = 4 super Yang-Mills
theories// Phys. Lett. B 524\, 208 (2002) \n6. I.L. Buchbinder\, E.A.
Ivanov\, V.A. Ivanovskiy. Superfield realization of hidden R-symmetry in
extended supersymmetric gauge theories and its applications. arXiv:2001.0
1649 [hep-th]\n\nhttps://mosphys.ru/indico/event/5/contributions/270/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/270/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Calibration of SiPM-based Neutron Monitors for CMS Experiment
DTSTART;VALUE=DATE-TIME:20200305T182400Z
DTEND;VALUE=DATE-TIME:20200305T183600Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-272@mosphys.ru
DESCRIPTION:Speakers: Oksana Bychkova (NRNU MEPhI)\nDevelopment of a distr
ibuted system of the neutron monitors is required to estimate the neutron
spectra and monitor the neutron fields in the CMS experimental cavern. The
proposed neutron monitor is based on the 6Li-enriched scintillator couple
d to SiPM. During LHC Run 2\, several monitor samples were successfully co
mmissioned at the CERN laboratory and tested in CMS environment with the s
et of Bonner spheres. To rescale collected data to the absolute value of t
he neutron flux the same SiPM-based monitor samples with the set of Bonner
spheres were calibrated at the CERN Radiation Protection calibration faci
lity using Am-Be source. Afterwards\, monitor readings measured in the CMS
radiation field can be deconvoluted to the neutron spectrum by means of t
he unfolding procedure.\n\nhttps://mosphys.ru/indico/event/5/contributions
/272/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/272/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Radiative recoil corrections to the hyperfine splitting of light m
uonic atoms
DTSTART;VALUE=DATE-TIME:20200305T181200Z
DTEND;VALUE=DATE-TIME:20200305T182400Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-266@mosphys.ru
DESCRIPTION:Speakers: Fedor Martynenko (Samara university)\nNuclear radiat
ive recoil corrections of order \\alpha(Z*\\alpha)^5 to the hyperfine stru
cture of S-states in light muonic atoms are calculated in the framework of
quasipotential method in quantum electrodynamics. Separate expressions fo
r the contributions of the muon self-energy\, muon vertex operator and the
amplitude with spanning photon are obtained. For the radiative photon\, w
e use the Fried-Yennie gauge. Numerical values of these corrections improv
e the accuracy of previous calculations and should be taken into account w
hen comparing with experimental data.\n\nhttps://mosphys.ru/indico/event/5
/contributions/266/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/266/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Geant4 simulation as part of luminometer development for CMS at HL
-LHC
DTSTART;VALUE=DATE-TIME:20200305T180000Z
DTEND;VALUE=DATE-TIME:20200305T181200Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-278@mosphys.ru
DESCRIPTION:Speakers: Daria Selivanova ()\nLuminosity is one of the main c
haracteristics of an accelerator. It determines the number of colliding pa
rticle (e.g. protons) interactions in a bunch crossing. The task of lumino
sity measurements in two-beam experiments is challenging. It becomes harde
r with the LHC upgrade – High-Luminosity LHC – with even higher ener
gies\, luminosity and a complex time structure of the beam. The proposed l
uminometer is being designed to perform online bunch-by-bunch luminosity m
easurements with the frequency of 25 ns\, the accuracy of 1% and the abili
ty to withstand high radiation. The proposed for this task radiation hard
quartz fibers are simulated using Geant4: the physics\, geometry and optic
al parameters are varied to optimize the accuracy of the processes of emis
sion\, capturing and transportation of Cherenkov light.\n\nhttps://mosphys
.ru/indico/event/5/contributions/278/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/278/
END:VEVENT
BEGIN:VEVENT
SUMMARY:DsTau (NA65): Study of tau neutrino production at the CERN-SPS
DTSTART;VALUE=DATE-TIME:20200305T174800Z
DTEND;VALUE=DATE-TIME:20200305T180000Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-252@mosphys.ru
DESCRIPTION:Speakers: Elizaveta Sitnikova (JINR)\nThe uncertainty in tau n
eutrino production in high energy proton interactions has been the largest
uncertainty in current and future tau neutrino measurements\, preventing
a precise test of lepton universality in neutrino scattering. DsTau (NA65)
at the CERN-SPS is a recently approved experiment\, which aims to study t
he problematic tau neutrino production. The main source of tau neutrino pr
oduction is through the decay of Ds mesons\, namely $D_s \\rightarrow \\ta
u \\nu_\\tau$ and then $\\tau \\rightarrow \\nu_\\tau X$. There is no data
on the differential production cross section of Ds in proton-nucleus inte
ractions\, which leads to a large uncertainty of tau neutrino cross sectio
n measurements. DsTau addresses this issue and will provide essential inpu
ts for future tau neutrino experiments. A large amount of charmed particle
s decay events ($\\sim 10^5$) is expected to be detected as well\, providi
ng a possibility for interesting by-product studies\, in particular a sear
ch for intrinsic charm in a proton. The experimental method is based on a
use of high resolution emulsion detectors for effective registration of ev
ents with short lived particle decays. Here I present the motivation of th
e study\, details of the experimental technique and the first results of t
he analysis of the data collected during test runs.\n\nhttps://mosphys.ru/
indico/event/5/contributions/252/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/252/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Neutron from cosmic muons background simulation in DANSS experimen
t
DTSTART;VALUE=DATE-TIME:20200305T173600Z
DTEND;VALUE=DATE-TIME:20200305T174800Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-262@mosphys.ru
DESCRIPTION:Speakers: Anna Ershova (MIPT\, ITEP)\nThe DANSS experiment aim
s to search for sterile neutrinos. It is a compact neutrino spectrometer l
ocated at the Kalinin Nuclear Power Plant close to the core of the industr
ial power reactor. The detector records about 3000-4000 events per day aft
er subtracting the background depending on the position. The significant c
ontribution to background events is made by neutrons from the interaction
of cosmic muons formed in the materials surrounding the detector volume. I
n this work preliminary results of neutron signal spectra are presented.\n
\nhttps://mosphys.ru/indico/event/5/contributions/262/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/262/
END:VEVENT
BEGIN:VEVENT
SUMMARY:On quantization in background scalar fields
DTSTART;VALUE=DATE-TIME:20200305T172400Z
DTEND;VALUE=DATE-TIME:20200305T173600Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-256@mosphys.ru
DESCRIPTION:Speakers: Dmitrii Trunin (MIPT & ITEP)\nWe consider (0+1) and
(1+1) dimensional Yukawa theory in various scalar field backgrounds\, whic
h are solving classical equations of motion. The (0+1)–dimensional theor
y we solve exactly. In (1+1)–dimensions we consider background fields of
the form $\\phi_{cl} = Et$ and $\\phi_{cl} = Ex$\, which are inspired by
the constant electric field. Here E is a constant. We study the backreacti
on problem by various methods\, including the dynamics of a coherent state
. We also calculate loop corrections to the correlation functions in the t
heory using the Schwinger–Keldysh diagrammatic technique.\n\nhttps://mos
phys.ru/indico/event/5/contributions/256/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/256/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Using of neural network technology for improvement of energy resol
ution of highly granular hadron calorimeter
DTSTART;VALUE=DATE-TIME:20200305T171200Z
DTEND;VALUE=DATE-TIME:20200305T172400Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-255@mosphys.ru
DESCRIPTION:Speakers: Sergey Korpachev ()\nThe technology of highly granul
ar calorimeters is one of the innovations that will be implemented in the
planned accelerator experiments\, for example in the future linear collide
r. The work is devoted to the study of hadronic showers in the highly gran
ular hadron calorimeter of the ILD detector and the application of machine
learning to the improvement of the energy resolution. The artificial neur
al network was built\, the dependencies between the selected input variabl
es were studied. The study was performed using the simulation of single ha
drons with energies from 5 to 60 GeV in the ILD detector.\n\nhttps://mosph
ys.ru/indico/event/5/contributions/255/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/255/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Development of a method for reweighting distributions to search fo
r new physics using effective field theory
DTSTART;VALUE=DATE-TIME:20200305T170000Z
DTEND;VALUE=DATE-TIME:20200305T171200Z
DTSTAMP;VALUE=DATE-TIME:20220927T132102Z
UID:indico-contribution-20-280@mosphys.ru
DESCRIPTION:Speakers: Artur Semushin ()\nIt is conveniently to use a model
-independent approach of effective field theory for indirect search of new
physics. This approach consists of parametrization of the lagrangian with
operators of higher dimensons with some coefficients. If we compare expe
rimental data with Monte Carlo results\, it becomes possible to impose an
upper limit of the value of coefficients. However\, the real value of any
coefficient belongs to a continuous spectrum\, whereas Monte Carlo modelin
g can be performed for discrete set of the values of coefficients. In this
work the problem of reweighting of kinematic distributions was considered
. There was developed a method to get distributions for any value of coeff
icient using initial distributions\, obtained with fixed coefficient value
. This method will be employed to get constraints on the values of coeffic
ients.\n\nhttps://mosphys.ru/indico/event/5/contributions/280/
LOCATION:HSE Study Center “Voronovo”
URL:https://mosphys.ru/indico/event/5/contributions/280/
END:VEVENT
END:VCALENDAR