Photon production from Pb + Pb collisions at sNN=5.02 TeV at the CERN Large Hadron Collider and at sNN=39 TeV at the proposed Future Circular Collider facility
| Autor: | Rupa Chatterjee, Somnath De, Pingal Dasgupta, Dinesh K. Srivastava |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Photon Large Hadron Collider 010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena High Energy Physics::Phenomenology Elliptic flow 01 natural sciences Future Circular Collider Spectral line Nuclear physics 0103 physical sciences Quark–gluon plasma High Energy Physics::Experiment Production (computer science) 010306 general physics Energy (signal processing) |
| Zdroj: | Physical Review C. 98 |
| ISSN: | 2469-9993 2469-9985 |
| Popis: | We calculate the production of prompt and thermal photons from $\text{Pb}+\text{Pb}$ collisions at $5.02A$ TeV at the Large Hadron Collider (LHC) and at $39A$ TeV at the proposed Future Circular Collider (FCC) facility. The photon spectra and anisotropic flow at these energies are compared with the results obtained from $2.76A$ TeV $\text{Pb}+\text{Pb}$ collisions at the LHC for three different centrality bins. The prompt photons originating from initial hard scatterings are found to increase by a factor of 1.5 to 2 at $5.02A$ TeV in the ${p}_{T}$ region 2 to 15 GeV and the enhancement is found to be about 5 to 15 times at FCC energies compared with $2.76A$ TeV in the same ${p}_{T}$ region. The evolution of the quark-gluon plasma (QGP) formed in $\text{Pb}+\text{Pb}$ collisions at LHC and FCC energies are studied by using a hydrodynamical model and the ${p}_{T}$ spectra and elliptic flow of thermal photons are calculated using state-of-the-art photon rates. The relative enhancement in the production of thermal photons is found to be more compared with prompt photons at FCC than at the LHC energies. Although the production of direct (prompt + thermal) photons is found to enhance significantly with increase in beam energy, the photon elliptic flow increases only marginally and does not show strong sensitivity to the collision energy. |
| Databáze: | OpenAIRE |
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