High Energy Physics:��fundamental physics�w/ the CMS experiment�at CERN
Group: CMS Padova cms-Padova@cern.ch
Site: CMS @DFA e https://cms.infn.it/
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Martino Margoni
Prof. Associato
Patrizia Azzi
Ricercatrice INFN
Marco Zanetti
Prof. Ordinario
Rocco Ardino
PhD student
Enrico Lusiani
post-doc
Franco Simonetto
Prof. Ordinario
Federica Fanzago
Tecnologa INFN
Sandro Ventura
Tecnologo INFN
Paolo Ronchese
Prof. Associato
Pierluigi Bortignon
Prof. Associato
@UNICA
Mia Tosi
RTDb
Ugo Gasparini
Prof. Ordinario
Paolo Checchia
Emeritus
Jacopo Pazzini
Prof. Associato
Gabriele Bortolato : PhD student
Nicolo’ Lai : PhD student
Sabrina Giorgetti : PhD student
Matteo Migliorini : PhD student
Andrea Bulla : PhD student @UNICA
Nicola Bacchetta : ricercatore INFN
Massimo Benettoni : tecnologo INFN
Antonio Bergnoli : tecnologo INFN
Marina Passaseo : tecnologa INFN
Marco Bellato : tecnologo INFN
Anna Meneguzzo : Emeritus
Dario Bisello : Emeritus
Fabrizio Gasparini : Emeritus
Roberto Carlin
Prof. Ordinario
Tommaso Dorigo
Ricercatore INFN
Andrea Triossi
Prof. Associato
Roberto Rossin
Prof. Associato
Alberto Zucchetta
Ricercatore INFN
Contacts / website
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Research Activities
- Flavour Physics
- Physics of the Higgs boson and the Standard Model
- Search for new physics signals
- Advanced statistical methods
- Advanced automatic reconstruction
- Advanced automatic event selection
- Advanced detector R&D
email to: cms-Padova@cern.ch
see Marco Zanetti’ slides
introduction
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is incredibly accurate, and it is based on
the Standard Model of particle physics
introduction
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is incredibly accurate, and it is based on
the Standard Model of particle physics
but plenty of unanswered questions !
..any many other questions are still open
introduction
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is incredibly accurate, and it is based on
the Standard Model of particle physics
but plenty of unanswered questions !
the Large Hadron Collider at CERN
13.6 TeV
introduction
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is incredibly accurate, and it is based on
the Standard Model of particle physics
but plenty of unanswered questions !
the Large Hadron Collider at CERN
via the CMS experiment
and its data
- detector to operate
- a new detector to build
- freshly recorded data
to be understood
and calibrated
- new technologies
in the field of Big Data
- lots of exciting physics !
CMS is a unique opportunity for young physicists !
introduction
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is incredibly accurate, and it is based on
the Standard Model of particle physics
but plenty of unanswered questions !
the Large Hadron Collider at CERN
via the CMS experiment
and its data
CMS is a unique opportunity for young physicists !
DETECTOR
STUDIES
ALGORITHMS
DEVELOPMENT
CMS
main activities
in Padova
PHYSICS
ANALYSES
The CMS Padova group has consistently kept
a leading role in the experiment
w/ many position of responsibilities
in detector construction,
physics analyses, automatic event
reconstruction and selection,
and even providing a spokesperson !
LHC
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for observing the Higgs boson
and new physics signals
we need an accelerator which maximizes
LHC is the biggest and most powerful
proton-proton collider in the world
CMS – Compact Muon Solenoid
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multi-porpoise HEP detector
- hermetic
- large acceptance
- very strong magnetic field (3.8 T)
- very precise
particles trajectory measurement
- excellent electromagnetic
energy resolution
- excellent muon reconstruction
What do we see ?
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opportunities
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energy and luminosity
consolidate Run2 observations
e.g. H→ff, VH, ttH, VV, VBS, tttt, ..
⇒ systematics becoming relevant
precision
(calibrations and methods)
new phase space
Some examples : di-higgs
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Some examples : H coupling
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by measuring the Higgs boson decay rate to a particle,
we infer the interaction strength between
the Higgs field and that particle
⇒ these measurements directly test the predicted mechanism
by which particles acquire mass
⇒ observe the Higgs decay into muons :
is the next experimental frontier (so-far untested mass scale)
- challenge :
very rare SM process (1/5000 Higgs)
very large SM background (S/B ~ 1/1000)
- opportunity :
very large statistics (Run2+Run3)
+ advanced analyses techniques
Some examples : VBS (and VBF)
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Trilinear and Quartic Gauge Couplings (TGC, QGC)
precisely determined by SU(2) x U(1) gauge symmetry
Anomalous Gauge Coupling would result in different
- production cross-section
- differential cross-section
⇒ Vector Boson Scattering at 13.6 TeV:
is a key test of the SM and a possible
means for highlighting new physics
- challenge :
very rare SM process
complex event topologies
- opportunity :
new strategy for enhancing statistics
liaison w/ theory model
Some examples : rare process
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new heavy particles can affect some interactions
and make them deviate from the Standard Model prediction
⇒ production of a top quark w/ a W boson and a Z boson (tWZ)
sensitive to the presence of new particles
- challenge :
very low cross-section in the SM
- opportunity :
clean signature
large statistics in Run3
liaison w/ theory model
explore the mysteries
of the universe
by pushing the boundaries
of the Standard Model
Some examples : �matter-antimatter puzzle
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is a symmetry between matter and antimatter
the observed imbalance of matter and antimatter in the Universe
but the amount of CP violation as predicted by the Standard Model
as well as the observed so far in experiments
is too small to explain the cosmic imbalance
⇒ there is an as-yet-unknown sources of CP violation
beyond the Standard Model
CP-violating phase in the Bs system (φs)
is predicted in the Standard Model
and the effects of new physics
could change its value significantly
Some examples : the future
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The High-Luminosity LHC (HL-LHC), due to start in 2029,
will deliver about x10 data than has been accumulated so far
⇒ to exploit the HL-LHC physics potential,
the CMS collaboration is building an optimised detector
that pushes technologies to new heights
(greater radiation damage and higher particle rates)
High granularity
the key to achieving the necessary HL-LHC performance
is to enhance the granularity of the detector
⇒ reduce the maximum occupancy per readout cell
while considerably increasing the readout bandwidth
and processing power of the trigger system
⇒ full particle-flow reconstruction at the hardware-based trigger (at 40 MHz)
⇒ precision timing information, which contributes to the high-level-trigger,
is exploited by highly optimised software mostly running on GPUs
Contacts
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Group: CMS Padova cms-Padova@cern.ch