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2010•International Journal of Modern Physics ERequires access

EVENT-BY-EVENT FLUCTUATIONS OF NET-BARYON DISTRIBUTION AND HIGHER ORDER CUMULANTS

You Zhou, Kejun Wu, Feng Liu

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Abstract

We analyze fluctuations of net baryon distribution as well as its higher order cumulants, the 2rd order(c2), 4th order cumulants(c4) and other variant high order cumulants like Skewness, Kurtosis, R4,2 as a function of the collision centrality. At the same time, we study the results of transverse momentum and rapidity cut effects of all observables. We argue that Skewness and Kurtosis are promising observables in experiments considering to their independence of acceptance. Beam energy dependences of Skewness and Kurtosis have been studied, these works provide baseline predictions for the forthcoming RHIC Beam Energy Scan program.

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What this paper is about

We analyze fluctuations of net baryon distribution as well as its higher order cumulants, the 2rd order(c2), 4th order cumulants(c4) and other variant high order cumulants like Skewness, Kurtosis, R4,2 as a function of the collision centrality. At the same time, we study the results of transverse momentum and rapidity cut effects of all observables. We argue that Skewness and Kurtosis are promising observables in experiments considering to their independence of acceptance. Beam energy dependences of Skewness and Kurtosis have been studied, these works provide baseline predictions for the forthcoming RHIC Beam Energy Scan program.

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Available abstract

We analyze fluctuations of net baryon distribution as well as its higher order cumulants, the 2rd order(c2), 4th order cumulants(c4) and other variant high order cumulants like Skewness, Kurtosis, R4,2 as a function of the collision centrality. At the same time, we study the results of transverse momentum and rapidity cut effects of all observables. We argue that Skewness and Kurtosis are promising observables in experiments considering to their independence of acceptance. Beam energy dependences of Skewness and Kurtosis have been studied, these works provide baseline predictions for the forthcoming RHIC Beam Energy Scan program.

Key concepts: Cumulant, Kurtosis, Skewness, Rapidity, Physics, Observable, Event (particle physics), Statistical physics

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