Mean transverse momentum fluctuations in baryon-rich matter are driven by energy and baryon density variations, remain robust to baryon diffusion, and show splitting between protons and antiprotons.
Longitudinal fluctuations of the fireball density in heavy-ion collisions
2 Pith papers cite this work, alongside 61 external citations. Polarity classification is still indexing.
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abstract
We show that fluctuations of the fireball shape in the longitudinal direction generate nontrivial rapidity correlations that depend not only on the rapidity difference, y_{1} - y_{2}, but also on the rapidity sum, y_{1} + y_{2}. This is explicitly demonstrated in a simple wounded nucleon model, and the general case is also discussed. We show how to extract different components of the fluctuating fireball shape from the measured two-particle rapidity correlation function. The experimental possibility of studying the longitudinal initial conditions in heavy-ion and proton-proton collisions is emphasized.
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The shape of v0(pT), not its zero-crossing, encodes physical information about radial flow because centrality and normalization choices only shift the curve vertically without changing its form.
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Rapidity dependence of mean transverse momentum fluctuation and decorrelation in baryon-dense medium
Mean transverse momentum fluctuations in baryon-rich matter are driven by energy and baryon density variations, remain robust to baryon diffusion, and show splitting between protons and antiprotons.
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The shape of differential radial flow $v_0(p_T)$, not its zero-crossing, carries physical information
The shape of v0(pT), not its zero-crossing, encodes physical information about radial flow because centrality and normalization choices only shift the curve vertically without changing its form.