Centro de Ciencias de Benasque Pedro Pascual

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COST workshop on collectivity in small systems

2018, Aug 12 -- Aug 16

N. Armesto (U. Santiago de Compostela)
A. Kovner (U. Connecticut)
M. Lublinsky (U. Ben-Gurion)
C. Marquet (École Polytechnique)

Recent findings at RHIC and the LHC in collision systems from small, proton-proton (pp), to large, nucleus-nucleus (AA), show striking similarities concerning several observables, prominently the ridge. The behaviour of such observables is usually attributed, in AA, to collectivity described in macroscopic terms using relativistic hydrodynamics whose requirement of a large opacity, plausible in AA, seems difficult to fulfil in smaller systems. On the other hand, microscopic explanations e.g. in the CGC approach, successful in pp and pA, attribute the origin of these collective-like features to correlations in the wave function of the incoming hadrons. Therefore, the transition from detailed microscopic dynamics in small systems to a macroscopic description in large systems, can be studied in high-energy hadronic collisions.

The focus of the workshop, organised within the COST action Theory of hot matter and relativistic heavy-ion collisions THOR, http://www.cost.eu/COST_Actions/ca/CA15213, is a discussion about the microscopic explanations for the ridge in the framework of the CGC approach to high-energy QCD, the relation of such explanations with other microscopic approaches as multiple parton interactions and colour reconnections used in Monte Carlo simulators, and how a macroscopic description can emerge when the multiplicity in the system increases. The program for the workshop would consist of a few review talks, one per subject, plus contributed talks on more specific aspects.

Financial support

The workshop is supported by the COST Action CA15213 THOR

Registration fee information

The registration fee for this conference is:

Regular fee: 150 eur.
Students fee: 100 eur.

Pay by bank transfer

The registration fee must be paid to the account of the Centro de Ciencias de Benasque Pedro Pascual after your application has been accepted.

Ibercaja (account number): 2085 2310 3803 3004 4193
IBAN: ES44 2085 2310 3803 3004 4193

Remember that your registration is complete only after the payment is made.

* Please, pay after your application has been accepted.
* Please, send a confirmation by e-mail to info@benasque.org.
* Please pay all bank charges
* Include as a subject in the transfer '2018cost Your_Surname'
* In the comments section include:
      Full name of the conference and your name.

Pay by credit card

Senior: Pay by credit card
Student: Pay by credit card

* You have to be registered.
* Please, pay after your application has been accepted.

*Cancellation Policy*
A 30 euro charge will be applied for cancellations made up to 10 days before the conference start date.
A no refund policy will be applied to cancellations made after this date.

Bus Transportation

The center provides free buses:
From Barcelona, Universitat de Barcelona, Diagonal 686, Metro: L3 Palau Reial at 15:00h (Note that the bus stops opposite University of Barcelona, Facultat de Física i Química)

From Barcelona airport ('El Prat', Terminal T2A: on leaving exit, turn left and you will find a police building called 'Mossos d'Esquadra') at 15:30h.

Return buses:
From Benasque to Barcelona airport, departure at 9:00h.
The trip by bus to Barcelona takes 4-5h. approximately. The trip by car only takes 3h 30m.

Bus trajectories and dates:
- Barcelona-Benasque, Aug 12.
- Benasque-Barcelona, Aug 16.

Registration & accommodation

Application deadline is Jun 05

Further Information.

  • List of participants.
  • Scientific program.
  • Pictures

This session has received financial support from the following institutions:

  • logo CSIC
  • Gobierno de Aragón
  • Ministerio de educación y ciencia
  • DPH
  • Universidad de Zaragoza
  • Ayuntamiento de Benasque


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