| Full text | |
| Author(s): |
Samanta, Rupam
;
Bhatta, Somadutta
;
Jia, Jiangyong
;
Luzum, Matthew
;
Ollitrault, Jean-Yves
Total Authors: 5
|
| Document type: | Journal article |
| Source: | CNR '09: SECOND INTERNATIONAL WORKSHOP ON COMPOUND NUCLEAR REACTIONS AND RELATED TOPICS; v. 296, p. 4-pg., 2024-01-01. |
| Abstract | |
The ATLAS collaboration has recently observed that the variance of the transverse momentum per particle ([ p(t)]), when measured as a function of the collision multiplicity ( N-ch) in Pb+Pb collisions, decreases by a factor 2 for the largest values of Nch, corresponding to ultra-central collisions. We show that this phenomenon is naturally explained by invoking impact parameter (b) fluctuations, which contribute to the variance, and gradually disappear in ultracentral collisions. It implies that N-ch and [ p(t)] are strongly correlated at fixed b, which is explained by the local thermalization of the QGP medium. (AU) | |
| FAPESP's process: | 21/08465-9 - Initial dynamics of ultrarelativistic nuclear collisions from final transverse momentum |
| Grantee: | Matthew William Luzum |
| Support Opportunities: | Scholarships abroad - Research |
| FAPESP's process: | 18/24720-6 - Exploring the QCD phase diagram |
| Grantee: | Frédérique Marie Brigitte Sylvie Grassi |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 17/05685-2 - Hadronic physics in high energy nuclear collisions |
| Grantee: | Jun Takahashi |
| Support Opportunities: | Special Projects |