Energy and system-size dependence of the Chiral Magnetic Effect

Details Energy and system-size dependence of the Chiral Magnetic Effect Energy and system-size dependence of the Chiral Magnetic Effect

2010-11-25

arxiv.org/abs/1011.5589v1

Physics

Nuclear Physics

Nuclear Theory

8 pages, 8 figures; Talk given at the workshop "Hot and Cold Baryonic Matter", Budapest, August 15-19, 2010

Scientific paper

The energy dependence of the local ${\cal P}$ and ${\cal CP}$ violation in Au+Au and Cu+Cu collisions in a large energy range is estimated within a simple phenomenological model. It is expected that at LHC the chiral magnetic effect will be about 20 times weaker than at RHIC. At lower energy range, covered by the low-energy scan at RHIC and future NICA/FAIR facilities, the created magnetic field strength and energy density of deconfined matter are rather high providing necessary conditions for the chiral magnetic effect. However, the particular model for the chiral magnetic effect predicts that this effect should vanish sharply at energy somewhere above the top SPS one. To elucidate CME background effects the Hadron-String-Dynamics (HSD) transport model including electromagnetic fields is put forward. Importance of new planning experiments at LHC and for the low-energy RHIC scan program is emphasized.

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