Transcript Tasevsky_RECFA_270315

Czech participation in HEP
experiments (except ATLAS)
CERN
CERN
CERN
CERN
Marek Taševský
Institute of Physics, Academy of sciences
RECFA visit to Czech republic
Prague
27/03/2015
Universities and institutes in HEP experiments
except ATLAS
Plzeň:
Liberec:
UWB = University of West Bohemia
TU = Technical University
~ 70 Postdocs
~ 35 students
(may overlap
across
experiments)
Supported by
POLAND
GERMANY
LIBEREC
Olomouc:
PRAHA
Palacký University
PLZEŇ
OLOMOUC
Dominantly:
Ministry of
Education, Youth
and Sport
Partly: Grant
Agency of CR
BRNO
SLOVAKIA
AUSTRIA
Praha:
Brno:
CU = Charles University
CTU = Czech Technical University
IP ASCR = Institute of Physics, Academy of sciences of Czech rep.
INP ASCR = Institute of Nuclear Physics in Řež, Academy of sciences of Czech rep.
ISI ASCR = Institute of Scientific Instruments,
Academy of sciences of Czech rep.
27/03/2015
M. Tasevsky, RECFA visit
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H1 experiment
CU Prague
IP ASCR
R&D: 1) almost all read-out electrodes for EM and HAD
Calorimeters (~9000) produced and tested in Czech rep.
OF2H
IF2H
FB2H
FB1H
FB2E
FB1E
CB3H
CB2H
CB1H
OF1H
BBE
IF1E
D: 2) Testing of scintil. fibers and help in production of EM
SpaCal (Spaghetti Calorimeter)
D: 3) Electronics for Backward Silicon Tracker & Forward
Silicon Tracker
[repeater boards, supply boards, amplifier boards]
27/03/2015
M. Tasevsky, RECFA visit
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H1 Experiment
Principal authorship
in H1 publications:
2010-2015: 6 papers
Total
: 10 papers
Proton structure
Diffraction
-
Hard component in LRG Photoproduction (1994)
Thrust jet analysis in DIS in LRG (1997)
Dijets in diffr. Photoproduction with LRG (2010)
Diffractive FLD (2012)
Dijets in DIS events with FPS (2012)
Dijets in diffr. DIS, LRG (2014)
Dijets in diffr. DIS & Photopr. using VFPS (2015)
Diffractive D* (2015?)
Proud of
having
contributed
to this
fantastic
endeavor!
T. Laštovička
convenor of
ELAN WG
Diffractive longitudinal
Structure function
Factorization breaking :
diffractive dijets in photoproduction
R. Polifka convenor of Diffractive WG
Virtual photons
Dijets at low Q2
A. Valkárová – Executive Board
27/03/2015
M. Tasevsky, RECFA visit
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DØ Experiment
Principal authorship
in DØ publications:
2010-2015: 7 papers
Total
: 9 papers
(in many other contributed significantly)
Czech group a part of the Jet energy
scale WG for many years.
A. Kupčo
convenor
of JES WG
CU Prague
CTU Prague
IP ASCR
“Jet energy scale determination
in the DØ experiment”, NIMA
Jet physics
- “Inclusive jets from RunII”
- “Dijet azimuthal decorrelations”
- “3-jet mass cross sections”
Total syst. unc.
beats the total
CTEQ6.5M
PDF unc.!!
27/03/2015
M. Tasevsky, RECFA visit
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DØ Experiment
Top quark production
Around 2000: DØ strong demands on
computing capacities
→ the computer center in Institute
of Physics in Prague has been created.
Since then it became a powerful and
reliable Tier-2 grid center.
27/03/2015
“Measurement of mt in all-jet events”
“Meas. of ttbar x-section in high-mult jet events”
“Pt dependence of ttbar cross sections”
“Precision measurement of mt in l+j channel”
“Polarization of top quark in l+j channel”
Czech foot-print
also on the Tevatron Top
Combinations Boulevard
Talk by
J.Chudoba
M. Tasevsky, RECFA visit
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Belle & Belle II Experiment
CU Prague
Joined in 2008
Main features and aims:
 e+e- accel. KEKB in Tsukuba, E=8.0/3.5 GeV
to precisely measure differences between
particles and antiparticles in the B system,
hence the CP violation
 2000-2010: Belle experiment recorded
the largest existing B-meson sample (1/ab)
Contribution and visibility of the Czech group significant.
Participates in :
1) Physics analysis of Belle data
2) Development and Design of the vertex detector VXD
3) Physics program for Belle II
4) Software development (detector simulation,
Test beam data analysis)
27/03/2015
 Belle and BaBar helped in confirming
Kobayashi-Maskawa model (discovery of
CP invariance in B0 and D systems and
measured CKM parameters with 10% uncert)
 Upgrade of SuperKEKB to produce Y(4S)
resonance and to provide lumi of 50/ab.
 Upgrade of Belle → Belle II will help to
- provide more stringent tests of SM
- test various BSM theories
- explain matter/anti-matter asymmetry
Z. Doležal – chair of Belle II Institutional Board
M. Tasevsky, RECFA visit
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Belle II Experiment
Vertex detector VXD
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Marlin/Mokka simulations of the layout
DEPFET pixels development and testing
(laser, minimatrices)
gated mode essential for Belle II tested here for
the 1st time (reduces noise induced during injection)
Beam tests: simulation, analysis
Software development
Single particle
observation in DEPFET

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Imp.par. z0
Belle: 20mm
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Computing
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Belle II: <10mm
Time-dependent Angular
CP-violation Analysis
of B→ D* ρ Decay
Silicon detector Digitization
Background simulation and mixing
Alignment
Tested at the DESY beam test
CESNET GRID farm used for
MC production O(10%)
Job management SW development
(code refactoring)
Analyses of 2010 data
CZ
- Measure sin(2β + γ)
- Scalar → vector vector
27/03/2015
M. Tasevsky, RECFA visit
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COMPASS Experiment
COMPASS = Common Muon and Proton Apparatus for
Structure and Spectroscopy
CU Prague
CTU Prague
ISI ASCR Brno
TU Liberec
27/03/2015
Most important features:
1. Muon or hadron secondary beams
2. Solid state NH3 , 6LiD target
3. Powerful tracking system – 350 planes
4. PiD – Muon Walls, Calorimeters, RICH
M. Tasevsky, RECFA visit
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COMPASS Experiment: Polarized target
Superconducting solenoid: 2.5 T
16 trim coils
Field homogeneity: 10-4
Dipole field: 0.5 T
Temperature: ~ 50 mK (frozen)
Materials: NH3, 6LiD
Dilution factor: ~ 0.4
Performance:
Polarization: > 50%, > 90%
Field reversal: 8h, 24h
2014: Low-temperature polarized
target for a first ever pion-induced
Drell-Yan experiment with
polarized target
Two 60 cm oppositely polarized cells
Beam PID using CEDAR (Cerenkov Differential counter with Achromatic Ring focus):
h+ beam: p (75%), pi+(24%)
h- beam: pi-(97%), K-(2.5%), p-(1%)
27/03/2015
M. Tasevsky, RECFA visit
Possibility to study the beam and target
dependence of the Drell-Yan production
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COMPASS Experiment: RICH detector
Photon detectors
(PD) : MWPCs
with CsI
photocathodes
(5.3 m2),
photon
detectors:
CsI MWPC
Angular acceptance:
± 250 mrad horizontal
± 200 mrad vertical
mirror
wall
radiator:
C4F10
VUV mirror
wall, 21 m2,
116 unique
mirrors
5m
84,000 analog
read-out channels
vessel
Design and realization:
 multichannel PMs
(with Hamamatsu) [RD17]
 PMs sensitive to UV
 Optical focusing system
for CR transfer to PM
 Photon feedback system
Identification of π, K and protons
Cherenkov thresholds:
π / K / p ≈ 3 / 9 / 17 GeV
2σ π/K separation at 43 GeV
GEM principle
Need for new technology (fight with ion bombardment and photon feedback):
testing the new ThGEM and hybrid ThGEM+Micromegas (to replace CsI MWPC)
27/03/2015
M. Tasevsky, RECFA visit
ECONOMIC &
ROBUST
Manufactured by
standard PCB
techniques of
precise drilling
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and Cu etching.
COMPASS Experiment: DAQ
27/03/2015
M. Tasevsky, RECFA visit
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CMS Experiment
ECAL
Czech group significantly contributed
in R&D, tests, final choice of PbW04 crystals
and development of fabrication technology.
Example of R&D: calibration and performance
tests of Very-Front-End electronics
Helped in realization, preparation and
currently in operating ECAL.
Among founding institutes:
CU Prague
CTU Prague
ICM Prague
INP Rez
ISI ASCR Brno
27/03/2015
Currently (CU Prague)
- Operating the detector
- Upgrade of HCAL
- DAQ and Data management
M. Tasevsky, RECFA visit
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TOTEM Experiment
TOTEM = Total cross section, Elastic scattering
and diffraction Dissociation Measurement
CU Prague
IP ASCR
UWB Pilsen
Differential distribution for elastics: dip and bump structure confirmed
Impressive eta-coverage of the multiplicity measurements
27/03/2015
Total pp cross section: several methods. Leader in the field.
M. Tasevsky, RECFA visit
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TOTEM Experiment: RP production
Upgraded Roman Pot Spectrometer
(scheduled for Run II)
Existing RP220
(vertical + horizontal RPs)
CT-PPS [CMS-Totem Precision Proton
Spectrometer]
MoU signed by CMS
and Totem in 2013
RP147 relocated to 203-214m
(vertical + horizontal RPs)
Add: 1) Precision proton tracking (3D-Si)
Add: 2) Fast timing (Cerenkov) to reduce
pile-up background
Concentrate on Central Exclusive Production
[jets, W,Z, resonances]
TDR: CERN-LHCC-2014-021
Vakuum Praha produced
RPs also for ALFA (ATLAS
subdetector) and may do so
for AFP (ATLAS forward
proton upgrade).
27/03/2015
M. Tasevsky, RECFA visit
BIG expertise.
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TOTEM Experiment: Czech contribution
Responsibilities and key contributions:
1) Alignment method : J. Kašpar
2) Designs of L1 triggers
3) Data analysis: IP ASCR, Prague
4) Theory and phenomenology: IP ASCR, Prague
5) Cooling system: CTU Prague, V. Vacek
6) Roman Pots produced in Prague
Acknowledged contribution to phenomenology
of elastic scattering (IP ASCR, Prague):
dσ/dt at very small |t| does not behave as exp{Bt}
with constant B → standard West-Yennie interference
formula cannot be used for separation of Coulomb
and Nuclear amplitudes → analysis performed with
Kundrát - Lokajíček complete amplitude formula.
27/03/2015
M. Tasevsky, RECFA visit
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MoEDAL Experiment
MoEDAL = Monopole and Exotics Detector at the LHC
 7th and smallest experiment at LHC
 Detection of magnetic monopoles, dyons, Q-balls
and other highly ionizing (pseudo-)stable massive
particles
 Located in the LHCb cavern (around VELO subdet.)
 Passive Nuclear track-etch det. + Trapping det.
+ TimePix (TPX) det.
CTU Prague
Czech group fully responsible for the TPX detector system:
- Used for monitoring the radiation and background from neutrons and
energetic fragments
- Installed on the walls of the VELO cavern of the LHCb detector
1. R&D + production + installation + operation
2. Development of DAQ and sim+reco+analysis software
27/03/2015
M. Tasevsky, RECFA visit
Background
tracks around
VELO vertex
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NA62 Experiment
NA62 = measurements of Kaon and pion rare decays
CU Prague
 Extracting 74 GeV K+ beams from 400 GeV p-beams
 Main goal: measure
measure CKM coeff. Vtd with uncertainty < 10%
 Other program: Lepton flavor violation, C-parity viol.
Dark photons, Axions, Chiral pert. Theory
 Principles: High intensity, Fast timing, Low-mass tracking,
Hermetic veto for photons and muons, Particle ID
92% of
K-decays
kinematically
constrained
Czech group contributes in areas of:
1. Calibration of LKr calorimeter
2. Data reconstruction and analysis
3. Theory interpretations
27/03/2015
Main interests:
o Extremely rare decays: K+-> pi+nunu
o Forbiddens and Exotics in the pi0 decays
(synergy between theory and experimental groups)
[theory studies about pi0->e+e-]
M. Tasevsky, RECFA visit
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OSQAR Experiment
OSQAR = Optical Search for QED vacuum magnetic
Birefringence, Axions and photon Regeneration
 Powerful laser (P=18W) + 2 LHC dipoles (B=9T) + precise optomechanics
 Physics case:
Shining through the wall
1) Search for axions via photon regeneration
2) Vacuum magnetic birefringence (for the first time) [refr.index n-1~ 10^-22 in B=9.5T]
3) Search for chameleons via photon regeneration
Doing particle physics
in laboratory (sub-eV
energies) [at CERN]
Axion = solution to strong CP problem
& Non-SUSY Dark Matter candidate
Opti
cal barrier
Polarizer
Laser
A
g
g
x
Source of scalar or
pseudo-scalar particles
B=9T
x
CCD
Detector
Afterglow of the light
PhotonAxion
coupling
Detection:
counting
laser beam
Photon regeneration
region
Czech group fully responsible for the optical system:
1) R&D and testing of all advanced opto-mechanical
techniques performed in CR
Axion mass
(recently development of Fabry-Perots resonance
cavities to enhance the photon yields by 10^3)
[n-1 ~ 10^-14 at the moment]
2) Operating all three subexperiments at CERN
+ Data analysis
27/03/2015
TU Liberec
CTU Prague
CU Prague
M. Tasevsky, RECFA visit
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AEGIS Experiment
AEGIS = Antihydrogen Experiment: Gravity,
Interferometry, Spectroscopy
CTU Prague
Weak Equivalence Principle (universality of free fall) tested with very high precision on matter, never on antimatter.
Principal goal = test WEP on antihydrogen atoms (tests with charged antiparticles hopeless),
i.e. the direct measurement of the Earth’s gravitational acceleration on antihydrogen.
Antiprotons from Antiproton Decelerator + pulse of laser-excited positronium atoms → pulse of horizontally travelling
antihydrogen atoms → pass through a moire deflectometer → measure a tiny vertical drop induced by gravity
(gratings split the beam; annihilation with matter: Si strips measure ToF, photographic emulsions measure annihilation points)
Czech group:
- simulation program for modelling the dynamics of antihydrogen in generally oriented
electric and magnetic fields and response to the passage through detector
27/03/2015
M. Tasevsky, RECFA visit
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DIRAC Experiment
DIRAC = DImeson Relativistic Atom Complex
CTU Prague
IP Prague
Detection aparatus: two-arm magnetic spectrometer
Task: 1) precision determination of 2-particle relative momentum
(better than 0.5 MeV for particles with ~GeV momenta)
2) PID: π-/π+, K+/K-, p. Bg: e+/e-,µ+/µ- Running 2000 – 2012
Physics goals:
1) measure the [π-π+] atom lifetime of about
3 fs (ground state) with 10% uncertainty
Recent published (2011)
2) first observe [π−K+] & [π+K−] atoms
[data 2001-2003]:
3) then measure the [πK] atom lifetimes
–15
τ = 3.15 × 10
s, 9% unc.
Czech group contributions:
1. Hardware: responsibility for Horizontal hodoscopes
production of mirrors for Heavy Gas Cerenkov detector
(Czech company IMMA – see COMPASS mirrors)
2. Data control: estimate of various efficiencies, detector performances
and calibrations
3. Data analysis: corrections due to finite size of production region,
yields of p, p-, K, K+K- correlation function
27/03/2015
M. Tasevsky, RECFA visit
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Future Circular Collider at CERN
Forming an international collaboration to study:
 pp-collider (FCC-hh)  defining infrastructure requirements
~16 T  100 TeV pp in 100 km
~20 T  100 TeV pp in 80 km
 e+e- collider (FCC-ee) as potential intermediate step
Czech HEP community considers
CERN as its future. Institutes
follow closely the development
and are willing to sign MoU soon.
 p-e (FCC-he) option
 80-100 km infrastructure in Geneva area
 In line with European Strategy for Particle Physics 2013
At the moment one fellow
to work on detector design
(start June 2015)
1) Kick-off meeting : University Geneva, 12-15.2.2014
2) Preparatory International Collaboration Board meeting : CERN, 9-10.9.2014
3) First Annual FCC meeting : Washington, 23-27.3.2015
27/03/2015
M. Tasevsky, RECFA visit
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Summary
 Czech HEP community visible in number of experiments
 Large diversity of physics programs
 Around the globe (Europe, USA, Japan)
 Long tradition of the Czech presence in HEP experiments
(BIS, LUDMILA, RISK, BCDMS, UA4/2, NA57, WA94, WA97, H1, DELPHI, OPAL, D0, …)
 H1 and D0 finished but still a few PhD theses being completed these days
 A massive orientation to CERN: CMS, TOTEM, COMPASS, MOEDAL, NA62, OSQAR,
AEGIS, DIRAC

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

In each of these experiments, the Czech contribution is significant and recognized
Often multi-task commitment and responsibility within one experiment
Hardware – Software - Analysis
Several positions in managements
 Czech HEP community feels and sees the future in CERN. Therefore it supports FCC and
closely watches the development. Czech institutes are about to sign MoU soon.
 The community hopes for a continuous and adequate support (as it has been so far).
27/03/2015
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Special thanks
For help in providing information:
Alice Valkárová
Alexander Kupčo
Karel Soustružník
Miroslav Finger
Vojtěch Kundrát
Petr Beneš
Karol Kampf
Miroslav Šulc
Jan Smolík
27/03/2015
M. Tasevsky, RECFA visit
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