Czech participation in HEPexperiments (except ATLAS)

Marek Taševský

Institute of Physics, Academy of sciences

RECFA visit to Czech republic Prague 27/03/2015

HERA

TEVATRON

KEKB

CERN CERN CERN CERN

Universities and institutes in HEP experiments except ATLAS

LIBEREC

PLZEŇ

PRAHA

BRNO

OLOMOUC

Praha:CU = Charles UniversityCTU = Czech Technical UniversityIP ASCR = Institute of Physics, Academy of sciences of Czech rep.INP ASCR = Institute of Nuclear Physics in Řež, Academy of sciences of Czech rep.

Plzeň:UWB = University of West Bohemia

Liberec:TU = Technical University

Brno:ISI ASCR = Institute of Scientific Instruments, Academy of sciences of Czech rep.

Olomouc:Palacký University

GERMANY

AUSTRIA SLOVAKIA

POLAND~ 70 Postdocs~ 35 students(may overlapacross experiments)

Supported by

Dominantly: Ministry of Education, Youthand Sport

Partly: Grant Agency of CR

27/03/2015 M. Tasevsky, RECFA visit 2

H1 experiment

R&D: 1) almost all read-out electrodes for EM and HAD Calorimeters (~9000) produced and tested in Czech rep.

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]

OF2H OF1H

FB2H FB1H

IF2H

CB3H CB2H CB1H

IF1E

BBEFB2E FB1E

CU PragueIP ASCR

27/03/2015 M. Tasevsky, RECFA visit 3

H1 ExperimentPrincipal authorship in H1 publications:

2010-2015: 6 papersTotal : 10 papers

Factorization breaking :diffractive dijets in photoproduction

R. Polifka convenor of Diffractive WG

A. Valkárová – Executive Board

Proud of having contributedto this fantastic endeavor!

T. Laštovička convenor of ELAN WG

Dijets at low Q2

Diffractive longitudinalStructure function

27/03/2015 M. Tasevsky, RECFA visit 4

DØ Experiment

Principal authorship in DØ publications:

2010-2015: 7 papersTotal : 9 papers

“Jet energy scale determination in the DØ experiment”, NIMA

Total syst. unc.beats the total CTEQ6.5M PDF unc.!!

A. Kupčoconvenor of JES WG

- “Inclusive jets from RunII”- “Dijet azimuthal decorrelations”- “3-jet mass cross sections”

CU PragueCTU PragueIP ASCR

(in many other contributed significantly)

27/03/2015 M. Tasevsky, RECFA visit 5

DØ Experiment

“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-printalso on the Tevatron TopCombinations Boulevard

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. Talk by

J.Chudoba

27/03/2015 M. Tasevsky, RECFA visit 6

Belle & Belle II Experiment

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)

Main features and aimsMain 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)

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

CU PragueJoined in 2008

27/03/2015 M. Tasevsky, RECFA visit 7

Belle II Experiment

Single particle observation in

DEPFET

Belle II: <10m

Imp.par. z0

Belle: 20m

Vertex detector VXDMarlin/Mokka simulations of the layoutDEPFET 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 developmentSilicon detector DigitizationBackground simulation and mixingAlignmentTested at the DESY beam test

ComputingCESNET GRID farm used for MC production O(10%)Job management SW development (code refactoring)

CZTime-dependent Angular CP-violation Analysis of B→ D* ρ Decay

- Measure sin(2β + γ)- Scalar → vector vector

Analyses of 2010 data

27/03/2015M. Tasevsky, RECFA visit 8

COMPASS Experiment

Most important features:1. Muon or hadron secondary beams2. Solid state NH3 , 6LiD target 3. Powerful tracking system – 350 planes4. PiD – Muon Walls, Calorimeters, RICH

COMPASS = Common Muon and Proton Apparatus for Structure and Spectroscopy

CU PragueCTU PragueISI ASCR BrnoTU Liberec

27/03/2015M. Tasevsky, RECFA visit 9

COMPASS Experiment: Polarized target

Two 60 cm oppositely polarized cells

Superconducting solenoid: 2.5 T 16 trim coils Field homogeneity: 10-4Dipole field: 0.5 TTemperature: ~ 50 mK (frozen)Materials: NH3, 6LiDDilution factor: ~ 0.4

Performance: Polarization: > 50%, > 90%Field reversal: 8h, 24h

2014: Low-temperature polarized target for a first ever pion-inducedDrell-Yan experiment with polarized target

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%)

Possibility to study the beam and targetdependence of the Drell-Yan production

27/03/2015 M. Tasevsky, RECFA visit 10

COMPASS Experiment: RICH detector

5 m

5 m

6 m6 m3 m3 m

mirrorwall

vessel

radiator:C4F10

photon detectors:CsI MWPC

Photon Photon detectors detectors (PD) (PD) : : MWPCs MWPCs with CsI with CsI photocathodes photocathodes (5.3 m(5.3 m22)),,

84,000 analog 84,000 analog read-out read-out channelschannels

VUV mirror VUV mirror

wall, wall, 21 m21 m22,,

116 unique 116 unique

mirrorsmirrors

Angular acceptance: ± 250 mrad horizontal± 200 mrad vertical

Need for new technology (fight with ion bombardment and photon feedback): testing the new ThGEM and hybrid ThGEM+Micromegas (to replace CsI MWPC)

GEM principleECONOMIC ECONOMIC & ROBUST & ROBUST

Manufactured by standard PCB techniques of precise drilling and Cu etching.

Developed and produced

by Czech comp. IMMA.

Enabled to realize optics

systems in astroparticle

experiments HESS and

SPHERE

Design and realization:multichannel PMs (with Hamamatsu) [RD17]PMs sensitive to UVOptical focusing systemfor CR transfer to PMPhoton feedback system

27/03/2015 M. Tasevsky, RECFA visit 11

COMPASS Experiment: DAQ

27/03/2015 M. Tasevsky, RECFA visit 12

CMS Experiment

ECALCzech group significantly contributedin R&D, tests, final choice of PbW04 crystalsand development of fabrication technology.

Example of R&D: calibration and performancetests of Very-Front-End electronics

Helped in realization, preparation and currently in operating ECAL.

Among founding institutes:CU PragueCTU PragueICM PragueINP RezISI ASCR Brno

- Operating the detector-Upgrade of HCAL-DAQ and Data management

Currently (CU Prague)

27/03/2015 M. Tasevsky, RECFA visit 13

TOTEM ExperimentTOTEM = Total cross section, Elastic scattering and diffraction Dissociation Measurement

Impressive eta-coverage of the multiplicity measurementsTotal pp cross section: several methods. Leader in the field.

Differential distribution for elastics: dip and bump structure confirmed

CU PragueIP ASCRUWB Pilsen

27/03/2015 M. Tasevsky, RECFA visit 14

TOTEM Experiment: RP production

Existing RP220(vertical + horizontal RPs)

RP147 relocated to 203-214m(vertical + horizontal RPs)

Upgraded Roman Pot Spectrometer(scheduled for Run II)

All vacuum partsin Roman pots produced by Vakuum Prahacompany

Vakuum Prahadelivering RPs also for the upgrade

Vakuum Praha producedRPs also for ALFA (ATLASsubdetector) and may do sofor AFP (ATLAS forward proton upgrade).

BIG expertise.

CT-PPS [CMS-Totem Precision Proton Spectrometer]

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

MoU signed by CMSand Totem in 2013

27/03/2015 M. Tasevsky, RECFA visit 15

TOTEM Experiment: Czech contribution

2) Designs of L1 triggers

3) Data analysis: IP ASCR, Prague

1) Alignment method : J. Kašpar

4) Theory and phenomenology: IP ASCR, Prague

5) Cooling system: CTU Prague, V. Vacek

6) Roman Pots produced in Prague

Responsibilities and key contributions:

Acknowledged contribution to phenomenologyof 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 16

MoEDAL Experiment

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.

MoEDAL = Monopole and Exotics Detector at the LHC

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

Background tracks around VELO vertex

CTU Prague

27/03/2015 M. Tasevsky, RECFA visit 17

NA62 Experiment

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

NA62 = measurements of Kaon and pion rare decays

Czech group contributes in areas of:

1.Calibration of LKr calorimeter

2.Data reconstruction and analysis

3.Theory interpretations

Main interests:o Extremely rare decays: K+-> pi+nunuo Forbiddens and Exotics in the pi0 decays(synergy between theory and experimental groups)[theory studies about pi0->e+e-]

92% of K-decayskinematically constrained

CU Prague

27/03/2015 M. Tasevsky, RECFA visit 18

OSQAR ExperimentOSQAR = Optical Search for QED vacuum magneticBirefringence, Axions and photon Regeneration

Powerful laser (P=18W) + 2 LHC dipoles (B=9T) + precise optomechanics Physics case: 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

Source of scalar or pseudo-scalar particles

Photon regeneration region

Laser

Optical barrier Polarizer

B = 9 T

Detection:

counting laser beam

CCDDetector

A

x x

Prelim

inary

2014 run

Shining through the wall

Afterglow of the light

Doing particle physics in laboratory (sub-eV energies) [at CERN]

Photon-Axion coupling

Czech group fully responsible for the optical system:

1) R&D and testing of all advanced opto-mechanical techniques performed in CR (recently development of Fabry-Perots resonancecavities to enhance the photon yields by 10^3)[n-1 ~ 10^-14 at the moment]

2) Operating all three subexperiments at CERN + Data analysis

Axion = solution to strong CP problem& Non-SUSY Dark Matter candidate

TU LiberecCTU PragueCU Prague

Axion mass

27/03/2015 M. Tasevsky, RECFA visit 19

AEGIS ExperimentAEGIS = 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 20

DIRAC ExperimentDIRAC = DImeson Relativistic Atom Complex CTU Prague

IP Prague

Detection aparatus: two-arm magnetic spectrometerTask: 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 2) first observe [π−K+] & [π+K−] atoms 3) then measure the [πK] atom lifetimes

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

Recent published (2011)[data 2001-2003]:τ = 3.15 × 10–15 s, 9% unc.

27/03/2015 M. Tasevsky, RECFA visit 21

Future Circular Collider at CERNForming an international collaboration to study:

pp-collider (FCC-hh) defining infrastructure requirements

e+e- collider (FCC-ee) as potential intermediate step

p-e (FCC-he) option

80-100 km infrastructure in Geneva area

~16 T 100 TeV pp in 100 km~20 T 100 TeV pp in 80 km

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

At the moment one fellow to work on detector design(start June 2015)

Czech HEP community considers CERN as its future. Institutes follow closely the developmentand are willing to sign MoU soon.

In line with European Strategy for Particle Physics 2013

27/03/2015 M. Tasevsky, RECFA visit 22

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

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 M. Tasevsky, RECFA visit 23

Special thanks

27/03/2015 M. Tasevsky, RECFA visit 24

For help in providing information:

Alice ValkárováAlexander KupčoKarel SoustružníkMiroslav FingerVojtěch KundrátPetr BenešKarol KampfMiroslav ŠulcJan Smolík