Particle Physics Days 2025

13 Nov 2025, 09:00 → 14 Nov 2025, 17:18 Europe/Helsinki

Hanna Lempiäinen, Henning Kirschenmann (LUT University and Helsinki Institute of Physics (FI)), Ilkka Helenius (University of Jyväskylä), Jens Erik Brucken (Helsinki Institute of Physics (FI)), Matti Heikinheimo (University of Helsinki and Helsinki Institute of Physics), Pyry Runko (University of Jyväskylä)

Annual meeting of the Particle Physics Division of the Finnish Physical Society.

This is a two-day in-person meeting in Hyytiälä research station

https://www.helsinki.fi/en/research-stations/hyytiala-forest-station 

Please register as soon as possible. Participation guaranteed only for registrations before 22 October.

Accommodation and bus travel will be covered by HIP projects and/or FPS funding to the PP division. 

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 

Thursday 13 November

09:15 → 11:30 Bus Transfer from Jyväskylä to Hyytiälä

Departure times: Matkakeskus 9:30, University 9:45, Orivesi train station 11:35 (after the passengers from the train from Helsinki have joined the bus)

11:30 → 11:45 Bus Transfer from Orivesi Train Station to Hyytiälä

Participants from other places than Jyväskylä are invited to arrive by train at 11:31 to Orivesi. They will be picked up by the bus arriving from Jyväskylä.

11:45 → 12:40 Buffet lunch

12:55 → 13:45 Session: Talks on strategy process and long term perspectives

Convener: Henning Kirschenmann (LUT University and Helsinki Institute of Physics (FI))

12:55 European Particle Physics Strategy update - Nordic and Finnish perspective tbc

15 + 5 min

Speaker: Prof. Panja Luukka (Lappeenranta-Lahti University of Technology (FI))

Finland_ESPP_update_November 2025.pdf

13:15 Early Career Researchers - summary from ECFA ECRs

10+5'

Speakers: Hanna Lempiäinen, Laura Huhta (University of Jyvaskyla (FI)), Mikael Myllymaki (Helsinki Institute of Physics (FI)), Petja Kalle Matias Paakkinen

PPDays2025_ECFAECR.pdf

13:30 CoE in Neutron-Star Physics

Speaker: Aleksi Vuorinen (University of Helsinki)

PPT_2025_CoE.pptx

13:45 → 14:45 Session: QCD theory

Convener: Dr Ilkka Helenius (University of Jyväskylä)

13:45 QCD in UPCs

25+5'

Speaker: Vadim Guzey (University of Jyvaskyla)

Guzey_PPD25.pdf

14:15 Dense Matter

25+5'

Speaker: Risto Paatelainen

PPday25_paatelainen_final.pdf

14:45 → 15:15 Afternoon coffee

15:15 → 17:00 Evening session: Experimental overviews and upgrades

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

15:15 CMS+TOTEM/PPS experimental overview

25'+5'

Speaker: Nurfikri Norjoharuddeen (Helsinki Institute of Physics (FI))

251113_PPDays_CMSPPS_Nurfikri.pdf

15:45 Results from the recent 2025 light ion LHC run by ALICE

25+5 min

Speaker: Maxim Virta (University of Jyväskylä)

PPD_ALICE_lightion.pdf

16:15 CMS/PPS upgrades

20'+5'

Speaker: Jens Erik Brucken (Helsinki Institute of Physics (FI))

PPD25_CMS_upgrades.pdf

16:40 CMS: Triggering and triggerless analysis with edge AI

15' + 5'

Speaker: Santeri Laurila (CERN & Helsinki Institute of Physics (FI))

CMStriggers_SanteriLaurila_20251113.pdf

17:00 → 18:00 Agenda: Division meeting

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 2024-2025
5. Meetings organized in Finland 2024-2025
6. Meetings to be organized in Finland 2025-2026
7. RECFA representative report
8. ECFA ECR representatives report
9. Nominating a new PECFA delegate
10. AOB
11. Closing the meeting

MinutesGoogleDoc

17:00 RECFA

Speaker: Prof. Panja Luukka (Lappeenranta-Lahti University of Technology (FI))

PLuukka_LUT_RECFA_report_25.pdf

18:00 → 19:00 Dinner

18:00 → 23:00 Rantasauna

The small sauna is female-only from 18:00-20:00. After 20:00, and starting 18:00 for the large sauna, the saunas are unisex. Bring your swimwear (and/or change already in your room).

We also have the kota between the two saunas, a cozy fireplace, snacks (including sausages), and refreshments will be available there. Thanks to Ilkka et al. for taking care of these!

Friday 14 November

08:00 → 09:00 Breakfast

09:00 → 09:50 FCC-ee project status, physics goals and detector R&D

Speaker: Juska Pekkanen (CERN)

fcc_in_ppd_juska_v0.pdf

09:50 → 10:05 Short break (no coffee)

10:05 → 11:30 Session: Various Topics

Convener: Jens Erik Brucken (Helsinki Institute of Physics (FI))

10:05 Nonhydrodynamic effects in ultrarelativistic gases

15+5min

Speaker: Caio Brito (University of Jyväskylä)

deBrito-PPD-2025.pdf

10:25 MoEDAL-MAPP Experiment at CERN

15+5

Speaker: Dr Matti Kalliokoski (Helsinki Institute of Physics (FI))

MoEDAL-MAPP Experiment at CERN.pdf

10:45 POSEIDON (nuclear fuel imaging)

15+5

Speaker: Santeri Saariokari (Helsinki Institute of Physics (FI))

Poseidon_PPD-2025.pdf

11:05 Jet reconstruction in FoCal

15+5'

Speaker: Laura Huhta (University of Jyvaskyla (FI))

ParticlePhysicsDaysFoCalJets141125.pdf

11:25 Survey and group picture (QR Code, link, and picture)

IMG_0262.jpg

IMG_0262_withQR.jpg

IMG_0273_cropped.jpg

IMG_0273_cropped_withQR.jpg

Survey

11:30 → 12:30 Lunch

12:30 → 14:35 Session: Various topics

Convener: Matti Heikinheimo (University of Helsinki and Helsinki Institute of Physics)

12:30 Hyytiälä Station: Research done here

12:50 Cosmological gravitational particle production

15+5'

Speaker: Duarte Miguel da Silva Feiteira (University of Helsinki)

presentation_ppdays.pdf

13:10 Tachyonic production of dark relics: Numerical solutions to Quantum Kinetic Equations

15'+5'

Speakers: Olli Juho Aukusti Vaisanen (Helsinki Institute of Physics (FI)), Olli Väisänen

pphys_days_presentation_2025.pdf

13:30 Neural network enhanced Bayesian global analysis of relativistic heavy ion collisions

15+5'

Speaker: Harri Niemi (University of Jyväskylä)

niemi_hitu2025.pdf

13:50 The LO DIS dipole picture in exact kinematics

15+5

Speaker: Magnus Bertilsson

Particle_Physics_days_Presentation_2025_Magnus-8.pdf

14:10 Tales from particle physics

15+5'

Speaker: Timo Johnny Karkkainen (Helsinki Institute of Physics (FI))

ParticlePhysicsDay2025_v2.pdf

14:35 → 15:00 Coffee

15:00 → 15:30 Buses departing to Helsinki and Jyväskylä

If you need to catch a train at Orivesi train station (e.g. at 15:26), then please contact the organisers!

The Jyväskylä bus was originally scheduled to leave at 14:45 to catch the 15:26 train, if needed. As there is no need for the stop at Orivesi, the plan is to leave at 15:00 continue directly towards Jyväskylä (i.e. no stop at the train station).

The bus towards Helsinki is "ready for boarding" at 15:00 and will leave as soon as possible after. The bus will stop close to Kivistö train station in Vantaa (Keimola stop) and at Käpylä station on the way to Kumpula.