Search for critical fluctuations of the proton density in central A+A collisions at maximum SPS energy

• Authors: Nikolaos Antoniou , Nikos Davis , Fotis Diakonos
• Languages of publication: EN

Abstracts

EN

We performed an intermittency analysis of the proton density fluctuations in transverse momentum space for the collisions Si+A (A=Al,Si,P) and C+A (A=C,N) at maximum SPS energy $\sqrt {s_{NN} } $ ≈ 17 GeV). In our analysis we used exclusively proton tracks in the midrapidity region (|y
CM| ≤ 0.75). For the Si+A system we find signature of power-law distributed density fluctuations quantified by the intermittency index ϕ
2 which approaches in size the predictions of critical QCD [Phys. Rev. Lett. 97, 032002 (2006)]. This result supports further the recent findings of power-law fluctuations in the density of (π
+, π
−) pairs with invariant mass close to their production threshold for the Si+Si at the same energy, reported in [Phys. Rev. C 81, 064907 (2010)].

Keywords

EN

proton density fluctuations; intermittency analysis; QCD critical point

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2012
• Volume: 10
• Issue: 6
• Pages: 1330-1332

Dates

published

1 - 12 - 2012

online

4 - 12 - 2012

Contributors

author

Nikolaos Antoniou

• Department of Physics, wUniversity of Athens, GR-15771, Athens, Greece

author

Nikos Davis

• Department of Physics, wUniversity of Athens, GR-15771, Athens, Greece

author

Fotis Diakonos

• Department of Physics, wUniversity of Athens, GR-15771, Athens, Greece

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Identifiers

DOI

10.2478/s11534-012-0128-6