Particle Physics Day 2017

Hotel Arthur (Vuorikatu 19, Helsinki)

Hotel Arthur

Vuorikatu 19, Helsinki

Hotel Arthur, Vuorikatu 19, 00100 Helsinki, Finland
Aleksi Vuorinen, Mikko Voutilainen (Helsinki Institute of Physics (FI))

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

Registration is now closed.

Previous meetings:

Jyväskylä Nov 25th, 2016:

Helsinki Oct 30, 2015:

  • Aleksi Vuorinen
  • Claus Montonen
  • Dong Jo Kim
  • Eemeli Annala
  • Fredrik Oljemark
  • Guillaume Beuf
  • Harri Waltari
  • Henning Kirschenmann
  • Henri Hänninen
  • Jasper Parkkila
  • Jere Remes
  • Jorma Tuominiemi
  • Jukka Maalampi
  • Jussi Viinikainen
  • Kai Loo
  • Kalle Ala-Mattinen
  • Kari J. Eskola
  • Katri Huitu
  • Keijo Kajantie
  • Kimmo Kallonen
  • Kirill Boguslavski
  • Marco Zatta
  • Matti Heikinheimo
  • Matti Jarvinen
  • Matts Roos
  • Miguel Ángel Escobedo Espinosa
  • Mikko Lotti
  • Mikko Sainio
  • Mikko Voutilainen
  • Mindaugas Karciauskas
  • Niko Jokela
  • Oleg Lebedev
  • Oscar Henriksson
  • Paul Hoyer
  • Paula Eerola
  • Petja Paakkinen
  • Risto Paatelainen
  • Sampsa Vihonen
  • Santeri Laurila
  • Subhadeep Mondal
  • Terhi Järvinen
  • Timo Kärkkäinen
  • Tuomas Lappi
  • Tuomas Tenkanen
  • Vadim Guzey
  • Veikko Karimäki
  • Venus Keus
    • 10:30 AM
      Morning coffee
    • QCD session
      • 1
        QCD theory overview
        Speaker: Tuomas Lappi (University of Jyvaskyla)
      • 2
        ALICE experimental overview
        Speaker: Dong Jo Kim (University of Jyvaskyla (FI))
      • 3
        EPPS16 – First nuclear PDFs to include LHC data

        We present results of our recent EPPS16 global analysis of NLO nuclear parton distribution functions (nPDFs). For the first time, dijet and heavy gauge boson production data from LHC proton–lead collisions have been included in a global fit. Especially, the CMS dijets play an important role in constraining the nuclear effects in gluon distributions. With the inclusion of also neutrino–nucleus deeply-inelastic scattering and pion–nucleus Drell–Yan data and a proper treatment of isospin-corrected data, we were able to free the flavor dependence of the valence and sea quark nuclear modifications for the first time. This gives us less biased, yet larger, flavor by flavor uncertainty estimates. The EPPS16 analysis indicates no tension between the data sets used, which supports the validity of collinear factorization and universal nPDFs for nuclear hard-collision processes in the kinematical range studied.

        Speaker: Petja Paakkinen (University of Jyväskylä)
      • 4
        Deep inelastic scattering in the dipole picture at next-to-leading order

        We study quantitatively the importance of the recently derived NLO corrections to the DIS structure functions at small x in the dipole formalism. We show that these corrections can be significant and depend on the factorization scheme used to resum large logarithms of energy into renormalization group evolution with the BK equation. This feature is similar to what has recently been observed for single inclusive forward hadron production. Using a factorization scheme consistent with the one recently proposed for the single inclusive cross section, we show that it is possible to obtain meaningful results for the DIS cross sections.

        Speaker: Henri Johannes Hanninen (Helsinki Institute of Physics (FI))
      • 5
        Linear and non-linear flow mode in 5 TeV Pb-Pb
        Speaker: Jasper Parkkila (University of Jyvaskyla (FI))
    • 12:30 PM
      Buffet lunch
    • BSM session
      • 6
        Particle cosmology theory overview
        Speaker: Venus Keus (University of Helsinki)
      • 7
        CMS+TOTEM experimental overview
        Speaker: Henning Kirschenmann (Helsinki Institute of Physics (FI))
      • 8
        Non-perturbative study of Electroweak Phase Transition in BSM models

        Electroweak Phase Transition is frequently studied perturbatively by using finite T effective potential. In this talk, we remind how non-perturbative analysis can be performed and discuss our findings and their implications.

        Speaker: Tuomas Tenkanen
      • 9
        Search for charged Higgs bosons in the CMS experiment

        The Standard Model is one of the most successful theories of our time, but there still appear problems in the theory. One way to overcome these problems is an extended scalar sector. By adding an additional scalar doublet to the Standard Model we can predict in total five Higgs bosons instead of one and two of these are charged. At CERN LHC the charged Higgs bosons (H+) are searched for and the production mode depends on the mass of the charged boson. If the charged Higgs boson is lighter than the top quark mass the production happens through t -> H+b, but H+ that are heavier than a top quark can be produced through tb -> H+. This talk considers the fully hadronic final state of H+ -> τν and the analysis used in the search will be presented. The talk will also give an overview of the expected limits for the producton of the charged Higgs boson with 13 TeV and 35 fb-1, covering the mass range of 80-3000 GeV.

        Speaker: Mikko Lotti (Helsinki Institute of Physics (FI))
    • 3:00 PM
      Afternoon coffee
    • OTH session
      • 10
        Holography theory overview talk
        Speaker: Dr Niko Jokela
      • 11
        Neutrino physics experimental overview
        Speaker: Kai Krister Loo (University of Jyvaskyla (FI))
      • 12
        Constraints to Triplet Higgs model from oscillation experiments

        The triplet scalars, predicted by the left-right symmetric SU(2)xSU(2)xU(1) model and utilized in Type II seesaw model to explain the lightness of neutrinos, would generate nonstandard interactions (NSI) for neutrino propagating in matter. The bounds for NSI would then translate into constraints on the triplet Higgs model. I introduce the model and present current bounds and bounds improved by DUNE, the future long baseline neutrino oscillation experiment.

        Speaker: Timo Johnny Karkkainen (Helsinki Institute of Physics (FI))
      • 13
        Neutrino oscillations in BSM physics

        Following the celebrated discovery of neutrino oscillations, it became clear that the Standard Model had acquired yet another problem it could not explain: the origin of neutrino mass. Over the last few decades neutrino physics has seen an amazing progress, and very recently the field entered a new era, where properties of the standard three-neutrino paradigm can be tested to a high precision. In this talk I will make a very briefly review on what the recent and near-future developments in neutrino oscillation physics could teach us about what could possibly lie beyond the Standard Model.

        Speaker: Sampsa Vihonen
    • Division meeting: RECFA representative + ECFA delegate selection

      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 2016-2017
      5. Meetings organized in Finland 2016-2017
      6. Meetings to be organized in Finland 2017-2018
      7. Vote for RECFA representative
      8. Vote for ECFA delegate
      9. AOB
      10. Closing the meeting

      Convener: Tuomas Lappi (University of Jyvaskyla)