CERN Accelerating science

Initial Stages 2025

 

The 8^th International Conference on the Initial Stages in High-Energy Nuclear Collisions (Initial Stages 2025) is taking place in Taipei, Taiwan, from 7 to 12 September 2025.

The ALICE collaboration looks forward to presenting three plenary talks, nine parallel talks, and two posters!

A preview from ALICE:

The Large Hadron Collider mainly collides protons, but once a year it switches to colliding heavy ions, such as lead nuclei – for understanding the quark-gluon plasma (QGP), the primordial soup. But in early July, something new happened: the LHC collided oxygen-oxygen (OO) as well as neon-neon (Ne-Ne) - for a few days - bridging the gap between proton and lead ion collisions. 

For the first time, data from OO and Ne–Ne collisions at a center-of-mass energy per nucleon pair of 5.36 TeV have enabled the ALICE collaboration to observe:

 

(1) Geometry-driven hydrodynamic flow in light ions at the LHC:

 

 

The paper will appear here https://cds.cern.ch/record/2941600
 

(2) An enhancement in charged particle production compared with Pb-Pb collisions for similar system sizes:

 

(3) Evidence of a suppression of neutral pion production at high momentum:

 

ALICE Presentations:

ALICE Highlights	Sushanta Tripathy
ALICE results with small systems and light ions	Jan Fiete Grosse-Oetringhaus
Nuclear modification of 𝜋0 production in O--O collisions with ALICE	Nicolas Justus Strangmann
Quantifying the role of strangeness in baryon production mechanisms through angular correlations in pp collisions at 13.6 TeV with ALICE	Shirajum Monira
Probing the Neutron-Skin Effect with Charged--Hadron Ratios in Pb--Pb Collisions at √𝑠NN=5.36 TeV with ALICE	Bong-Hwi Lim
Charged particle production at mid and forward rapidities from small to large collision systems with ALICE	Marta Urioni
Probing strangeness enhancement in proton-proton collisions using rapidity correlations among a ϕ meson and a strange hadron with ALICE	Stefano Cannito
J/ψ polarization measurement in pp collisions at forward rapidity	Bhagyarathi Sahoo
Upsilon production and polarization measurements in pp collisions with ALICE	Kshitish Kumar Pradhan
Experimental discovery of the nuclear shape phase transition and nuclear structure on ultrashort timescales at the LHC with ALICE	Maxim Mikael Olavi Virta
FoCal - ALICE forward calorimeter upgrade	Takashi Hachiya
Associated production of charm mesons in pp collisions with ALICE	Andrea Tavira Garcia
Measurements of weak boson production via electrons in pp collisions at 13 TeV with ALICE	Subaru Ito
Measurements of the p/pi ratio as a function of the distance from the jet axis in pp and Pb-Pb collisions with ALICE	Yuto Nishida