Particle Physics Day 2019

Thursday 7 Nov 2019, 10:30 → 19:05 Europe/Helsinki

Hotel Arthur (Vuorikatu 19, Helsinki)

Aleksi Vuorinen, Mikko Voutilainen (Helsinki Institute of Physics (FI)), Venus Keus (University of Helsinki)

Annual meeting of the Particle Physics Division of the Finnish Physical Society at Hotel Arthur, Vuorikatu 19, 00100 Helsinki.

Registration is now extended through Oct 20.

Previous meetings linked from PP Division home pages and instructions to sign up to pp-findiv list:

https://www.mv.helsinki.fi/home/hitu_www/partdiv.html

Talk slides

• Chloe Gowling
• Javier Subils
• Timo-Enqvist_slides.pdf

10:30 → 11:00 Morning coffee

11:00 → 12:30 Morning session: QCD, ALICE and experimental BSM

Convener: Mikko Voutilainen (Helsinki Institute of Physics (FI))

11:00 D mesons & Dijets (invited)

I will showcase our recent works on heavy-flavour and dijet production at the LHC.

Speaker: Hannu Paukkunen (University of Jyväskylä)

Hitu19_Paukkunen.pdf

11:30 ALICE experiment overview (invited)

Speakers: Sami Sakari Rasanen (Helsinki Institute of Physics (FI)), Sami Sakari Rasanen (Helsinki Institute of Physics (FI))

PPD19_RasanenSami.pdf

12:00 Relativistic magneto-hydrodynamics in heavy-ion collisions

Speaker: Dr Gabriele Inghirami (University of Jyväskylä)

inghirami_ppd_helsinki_7.11.19.pdf

12:10 Detecting muons with SC16 detectors

Very large muon multiplicities were observed in DELPHI, L3+C, and ALEPH at LEP and also in ALICE at LHC. Their effective measurement times were very short. Cosmic-ray experiment EMMA in the Pyhäsalmi mine operates at about the same depth and high-multiplicity muon data has been collected for over a year using multipixel SC16 plastic scintillation detectors.

The SC16 detectors were also used in a measurement campaign that was performed at the Canfranc Underground Laboratory (LSC), Spain, to determine the directional muon flux in the laboratory.

Several high-multiplicity events have been observed in EMMA and a clear mountain profile was measured at Canfranc. Currently the EMMA-data is being interpreted in terms of CORSIKA simulations for air-shower physics and Geant4 simulations for rock penetration of muons and detector performance.

Speaker: Timo Enqvist

muons-SC16_TimoEnqvist.pdf

12:20 Probing Physics Beyond the Standard Model in Finland?

There is a broad consensus that we are at the threshold of a major breakthrough referred to as physics Beyond the Standard Model (BSM). If one agrees with the inadequacy of the Standard Model (SM) to explain the growing list of new, puzzling phenomena, it becomes obvious that the first key steps towards the solution are bound to come from experiments. It is also expected that neutrinos – the only known particles that disobey the predictions of the SM – are the most likely messengers of BSM. And indeed, there is an impressive global effort towards the design, construction and operation of giant neutrino experiments like DUNE, JUNO, HyperK, IceCube or KM3NeT. The relevant questions to the Finnish community are: to what extend should we be part of that research and, more specifically, what could be done in Finland. In my presentation I’ll outline three realistic options for a low-cost entry into that challenging field.

Speaker: Wladyslaw Henryk Trzaska (University of Jyvaskyla (FI))

Trzaska_BSM_physics_in_Finland.pdf

Trzaska_BSM_physics_in_Finland.pptx

12:30 → 13:30 Buffet lunch

13:30 → 15:00 First afternoon session: CMS/TOTEM and theoretical BSM

Convener: Aleksi Vuorinen

13:30 Left-right symmetric extensions of the standard model (invited)

Speaker: Katri Huitu (Helsinki University)

Huitu_PPDay.pdf

Huitu_PPDay.pptx

14:00 CMS+TOTEM experimental overview (invited)

Speaker: Sami Lehti (Helsinki Institute of Physics (FI))

CMSTotemReview_hitu19_v3.pdf

14:30 Recent physics results from TOTEM

The talk will contain a brief description of the most recent physics results from the TOTEM experiment at the LHC, especially the ones concerning the evidence of the t-channel exchange of a colourless C-odd three-gluon compound state, the so-called Odderon, in elastic scattering. Also a short description of the future plans of the experiment will be included.

Speaker: Kenneth Osterberg (Helsinki Institute of Physics (FI))

KO_TOTEM_Particle_Physics_Days_2019.pdf

14:40 Results and prospects with the CMS-TOTEM Precision Proton Spectrometer

With more than 100 fb-1 collected along LHC run 2, the CMS-TOTEM Precision Proton Spectrometer allows to probe the fundamental structure of the Standard model in various ways through the detection of forward scattered protons in combination with the central system. In this talk, the spectrometer and its detection principles will be presented, along with the first result obtained so far. In addition, prospects for future studies are introduced.

Speaker: Laurent Forthomme (Helsinki Institute of Physics (FI))

forthomme_helsinki_ppday19.pdf

14:50 Holographic Complex CFTs

The loss of criticality in the form of weak first-order transitions or the end of the conformal window in gauge theories can be described as the merging of two fixed points that move to complex values of the couplings. When the complex fixed points are close to the real axis, the system typically exhibits walking behavior with Miransky (or BKT) scaling. I will present a realization of these phenomena at strong coupling by means of the gauge/gravity duality, and give evidence for the conjectured existence of complex conformal field theories at the fixed points.

Speaker: Javier Subils

Complex CFTs.pdf

15:00 → 15:30 Afternoon coffee

15:30 → 17:00 Second afternoon session: Cosmology and dark matter

Convener: Venus Keus (University of Helsinki)

15:30 Higgs inflation: connecting the electroweak scale to inflation (invited)

The only scalar field in the Standard Model -the Higgs- can drive cosmological inflation. Despite being its simple and conservative construction, Higgs inflation opens up involved questions about loop corrections and renormalisation. It also offers the possibility to distinguish between different gravitational degrees of freedom using measurements of the CMB.

Speaker: Syksy Räsänen (University of Helsinki)

higgs12.pdf

higgs12.pptx

16:00 Dark matter searches outside the LHC, overview (invited)

Speaker: Matti Heikinheimo (Helsinki Institute of Physics)

DMsearches.pdf

16:30 Gravitational waves from phase transitions in the early universe

Speaker: Chloe Gowling (University of Sussex)

particle physics day Chloe.pdf

16:40 Life after LAGUNA – the status of Pyhäsalmi Mine

The decision of the LAGUNA consortium to jump onboard of non-European projects (namely DUNE and JUNO) could have been the final blow to the underground physics, and the whole re-use of the Pyhäsalmi mine. However, instead, it was the beginning of something new.

Before the activities in Pyhäsalmi Mine had concentrated in underground physics, but now as the main aim fade away, it gave room for new ideas: a multidisciplinary underground R&I centre Callio Lab was born. Different universities and research institutions have already joined the Callio Lab community. Callio Lab is governed by the Kerttu Saalasti Institute of the University of Oulu. Commercial and industrial projects at the Pyhäsalmi Mine are governed by the town of Pyhäjärvi through Pyhäjärven Callio.

In my talk, I will present the current status of Callio Lab, introduce relevant projects and the Callio Lab Visio for 2025 as a national, international underground research infrastructure.

www.calliolab.com
www.callio.info

Speaker: jari joutsenvaara (University of Oulu)

calliolab_2019Nov7.pdf

calliolab_2019Nov7.pptx

17:05 → 18:00 Division meeting: Agenda

Preliminary agenda:
1. Opening of the meeting, choosing the chair and secretary, and two persons for counting votes
2. Accepting the agenda
3. Choosing the board
4. Activity of the division 2018-2019
5. Meetings organized in Finland 2018-2019
6. Meetings to be organized in Finland 2018-2019
9. AOB
10. Closing the meeting

Convener: Mikko Voutilainen (Helsinki Institute of Physics (FI))

https://docs.google.com/document/d/1E9TWaM3RBV5NIm9FQTo9OKhiFfljyS2PReEvw0RCYe8/edit?usp=sharing