Heavy-flavour hadronization in pp and heavy ion collisions at the LHC

Europe/Zurich
4/3-006 - TH Conference Room (CERN)

4/3-006 - TH Conference Room

CERN

19
Show room on map
Description

The LHC Collaborations reported measurements of the baryon-to-meson ratios for open charm and bottom hadrons in pp, p-Pb and, to some extent, Pb-Pb collisions at the LHC that challenge the present understanding of heavy-quark hadronization in hadronic collisions. The Lambda_c/D,  Xi_c/D and Lambda_b/B ratios at low momentum are larger than those measured in e+e– and ep collisions at LEP and HERA and predicted by event generators based on string fragmentation and tuned to describe the LEP and HERA data. The Lambda_c/D ratio in pp and p-Pb collisions is remarkably similar to the Lambda/K ratio and both are larger than the p/pi ratio. 

These findings show that the baryon-to-meson ratio depends on the collision system, highlighting the relevance of “long-distance” effects in heavy-quark hadronization. Various QCD mechanisms are recently being considered in the theory community to describe the observations, including colour reconnection, ropes, or statistical approaches. Such effects also have an impact on the measurement of the total heavy-quark production cross section and on the usage of D and B meson production measurements to constrain the PDFs in the proton and in the nucleus.
In nucleus-nucleus collisions, where a hot and dense quark-gluon plasma forms and collectively expands, the enhancement of baryon-to-meson ratios is predicted by theoretical models in which heavy quarks with low momentum hadronize by coalescence with light quarks from the plasma. The first measurements of Lambda_c production in nucleus-nucleus at the LHC (and at RHIC) hint at a larger ratio to D mesons, with respect to the case of pp collisions.
The goals of the proposed workshop are:

  1. review and compare the results from the LHC experiments in various collision systems
  2. review the status of hadronisation in pp and p-Pb collisions as described in event generators
  3. discuss possible new measurements and theory developments
  4. discuss the possible commonalities of the physics mechanisms in small and large hadronic collision systems as well as in the light- and heavy-flavour sectors.  

​VIDYO connection will be available.

For information relative to housing, access to CERN for those not holding a CERN card and laptop registration, please check http://lpcc.web.cern.ch/about

The workshop is co-sponsored by the STRONG 2020 project (EU Horizon 2020 grant 824093). 

Videoconference Rooms
HEAVY-FLAVOUR_HADRONIZATION
Name
HEAVY-FLAVOUR_HADRONIZATION
Description
Workshop
Extension
10866418
Owner
Michelangelo Mangano
Auto-join URL
Useful links
Phone numbers
Registration
Registration Form
Participants
  • Adriano Di Florio
  • Ahmed Ali
  • Aleksandr Berezhnoi
  • Alexander Philipp Kalweit
  • Alexis Pompili
  • Anastasios Papadopoulos
  • Andrea Addazi
  • Andrea Alici
  • Andrea Beraudo
  • Andrea Dainese
  • Andrea Rossi
  • Andrzej Siodmok
  • Angelo Esposito
  • Anton Andronic
  • Antonino Marciano
  • Antonio Davide Polosa
  • Antonio Polosa
  • Benjamin Audurier
  • Chiara Zampolli
  • Christopher Hills
  • David Krofcheck
  • Elisa Meninno
  • Erin Gauger
  • Fabio Catalano
  • Fabio Colamaria
  • Fabrizio Grosa
  • Federico Antinori
  • Fernando BARREIRO
  • Fouad Rami
  • Francesca Bellini
  • Francesco Dettori
  • Francesco Prino
  • Georgios Karathanasis
  • Gian Michele Innocenti
  • Giuseppe Bruno
  • Giuseppe Trombetta
  • Grazia Luparello
  • Hendrik van Hees
  • Hengne Li
  • Huasheng Shao
  • Jaime Norman
  • Jakub Kvapil
  • Javier Llorente Merino
  • Jean Cleymans
  • Jean-Philippe Lansberg
  • Joao Seixas
  • Konstantin Toms
  • Krzysztof Redlich
  • Leonardo Cristella
  • Lucas Anne Vermunt
  • Luciano Maiani
  • Luigi Dello Stritto
  • Marianna Mazzilli
  • Marielle Chartier
  • Matteo Cacciari
  • Maximiliano Puccio
  • Michelangelo Mangano
  • Min He
  • Muhammad Alibordi
  • Nicolo Jacazio
  • Nuno Leonardo
  • Nur Zulaiha Binti Jomhari
  • Oveis Sheibani
  • Peter Richardson
  • Peter Skands
  • Pietro Antonioli
  • Pim te Rietmole
  • Qamar Ul Hassan
  • Rahul Nair
  • Ralf Rapp
  • Sally Seidel
  • Salvatore Plumari
  • Sandro Fonseca De Souza
  • Sanjeev Kumar
  • Sebastian Tapia Araya
  • Sebastian Tapia Araya
  • Sergio Calvente Lopez
  • Silvia Masciocchi
  • Simon Plätzer
  • Simone Amoroso
  • Songkyo Lee
  • Stefano Trogolo
  • Vieri Candelise
  • Vit Kucera
  • Vivek Singh
  • Will Brooks
  • Yanxi Zhang
  • Zaida Conesa del Valle
  • Zhaozhong Shi
  • Émilien Chapon
    • 14:00 14:40
      What can we learn about HQ diffusion from AA and pA? 40m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Hendrik van Hees (Goethe University Frankfurt)
    • 14:40 15:05
      What can we learn about Heavy Flavour hadronization from pp, pA and AA @ LHC? 25m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Salvatore Plumari (University of Catania (Italy))
    • 15:05 15:30
      Heavy Flavour in the Statistical Hadronization Model 25m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Anton Andronic (Westfaelische Wilhelms-Universitaet Muenster (DE))
    • 15:30 16:10
      Azimuthal anisotropies in heavy quark production in pp and PbPb, and PbPb onium production: ATLAS results 40m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Songkyo Lee (Iowa State University (US))
    • 16:10 16:40
      Coffee 30m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
    • 16:40 17:05
      Measurement of Lambda_c and Xi_c production in pp and p-Pb collisions with ALICE 25m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Pietro Antonioli (Universita e INFN, Bologna (IT))
    • 17:05 17:35
      Heavy Flavour production in pp and heavy ion collisions at LHCb 30m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Dr Benjamin Audurier (Centre national de la recherche scientifique)
    • 17:35 18:15
      Wrap-up discussion 40m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
    • 18:30 19:30
      Welcome drink 1h 61/1-201 - Pas perdus - Not a meeting room -

      61/1-201 - Pas perdus - Not a meeting room -

      CERN

      Show room on map

      Salle des Pas perdue is just adjacent CERN's Main Auditorium, on the floor above the cafeteria

  • Tuesday, 3 March
    • 09:00 09:30
      Soft Heavy Flavour Production in PYTHIA 30m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Peter Skands (Monash University (AU))
    • 09:30 10:00
      Soft Heavy Flavour Production in HERWIG 30m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Simon Platzer (University of Vienna (AT))
    • 10:00 10:25
      Charm hadron production in pp and PbPb collisions - Theory 25m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Min He
    • 10:25 10:55
      Coffee 30m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
    • 10:55 11:35
      B_s, D_s, and strange and charm baryons in pp and PbPb with CMS 40m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Zhaozhong Shi (Massachusetts Inst. of Technology (US))
    • 11:35 12:00
      Measurement of Lambda_c production in Pb-Pb collisions with ALICE 25m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Lucas Anne Vermunt (Utrecht University (NL))
    • 12:00 12:25
      Measurement of D_s production in pp, pPb and PbPb collisions with ALICE 25m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Fabrizio Grosa (Politecnico di Torino (IT))
    • 12:25 14:00
      Lunch break 1h 35m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
    • 14:00 14:25
      ATLAS measurement of Ks0 and Lambda0 production in ttbar dileptonic events 25m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Sergio Calvente Lopez (Universidad Autonoma de Madrid (ES))
    • 14:25 14:50
      ATLAS measurement of the relative Bc/B+ production cross section 25m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Konstantin Toms (University of New Mexico (US))
    • 14:50 15:30
      X production in pp and PbPb, and heavy flavour hadron spectroscopy with CMS 40m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Alexis Pompili (Universita e INFN, Bari (IT))
    • 15:30 16:00
      Theoretical aspects of heavy quark exotica production in pp, pA and AA 30m 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map
      Speaker: Antonio Polosa (Sapienza Universita e INFN, Roma I (IT))
    • 16:00 17:00
      Summary Discussion 1h 4/3-006 - TH Conference Room

      4/3-006 - TH Conference Room

      CERN

      19
      Show room on map