Onset of radial flow in p+p collisions
| Autor: | Jiang, Kun, Zhu, Yinying, Liu, Weitao, Chen, Hongfang, Li, Cheng, Ruan, Lijuan, Shao, Ming, Tang, Zebo, Xu, Zhangbu |
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| Rok vydání: | 2013 |
| Předmět: | |
| DOI: | 10.48550/arxiv.1312.4230 |
| Popis: | It has been debated for decades whether hadrons emerging from p+p collisions exhibit collective expansion. The signal of the collective motion in p+p collisions is not as clear/clean as in heavy-ion collisions because of the low multiplicity and large fluctuation in p+p collisions. Tsallis Blast-Wave (TBW) model is a thermodynamic approach, introduced to handle the overwhelming correlation and fluctuation in the hadronic processes. We have systematically studied the identified particle spectra in p+p collisions from RHIC to LHC using TBW and found no appreciable radial flow in p+p collisions below $\sqrt{s}=900$ GeV. At LHC higher energy of 7 TeV in p+p collisions, the radial flow velocity achieves an average value of $= 0.320\pm0.005$. This flow velocity is comparable to that in peripheral (40-60%) Au+Au collisions at RHIC. Breaking of the identified particle spectra $m_T$ scaling was also observed at LHC from a model independent test. Comment: 6 pages, 3 figures, add nearly 300 data points from ALICE experiment by their request.Rephrased a little bit. Results and conclusions remain the same |
| Databáze: | OpenAIRE |
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