Testing hydrodynamic descriptions of p+p collisions at $$$$\sqrt{s}=7$$$$ s = 7 TeV
In high-energy collisions of heavy ions, experimental findings of collective flow are customarily associated with the presence of a thermalized medium expanding according to the laws of hydrodynamics. Recently, the ATLAS, CMS, and ALICE experiments found signals of the same type and magnitude in ultrarelativistic proton-proton collisions. In this study, the state-of-the-art hydrodynamic model SONIC is used to simulate the systems created in p+p collisions. By varying the size of the second-order transport coefficients, the range of applicability of hydrodynamics itself to the systems created in p+p collisions is quantified. It is found that hydrodynamics can give quantitatively reliable results for the particle spectra and the elliptic momentum anisotropy coefficient v2. As a result, using a simple geometric model of the proton based on the elastic form factor leads to results of similar type and magnitude to those found in experiment when allowing for a small bulk viscosity coefficient.
- Research Organization:
- Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- FG02-97ER41014; SC0008132
- OSTI ID:
- 1264788
- Alternate ID(s):
- OSTI ID: 1437932
- Journal Information:
- European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Vol. 76 Journal Issue: 7; ISSN 1434-6044
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- Germany
- Language:
- English
Web of Science
Similar Records
production in collisions at TeV and in collisions at TeV
Measurement of the inclusive isolated photon production cross section in p p collisions at $\sqrt{s}$ =7 TeV