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We present measurements of $\pi^-$ and $\pi^+$ elliptic flow, $v_2$, at midrapidity in Au+Au collisions at $\sqrt{s_{_{\rm NN}}} =$ 200, 62.4, 39, 27, 19.6, 11.5 and 7.7 GeV, as a function of event-by-event charge asymmetry, $A_{ch}$, based on data from the STAR experiment at RHIC. We find that $\pi^-$ ($\pi^+$) elliptic flow linearly increases (decreases) with charge asymmetry for most centrality bins at $\sqrt{s_{_{\rm NN}}} = \text{27 GeV}$ and higher. At $\sqrt{s_{_{\rm NN}}} = \text{200 GeV}$, the slope of the difference of $v_2$ between $\pi^-$ and $\pi^+$ as a function of $A_{ch}$ exhibits a centrality dependence, which is qualitatively similar to calculations that incorporate a chiral magnetic wave effect. Similar centrality dependence is also observed at lower energies.

10 data tables match query

Table 1

The distribution of observed charge asymmetry from STAR data.

Table 2

Pion $v_2${2} as a function of observed charge asymmetry.

Table 3

$v_2$ difference between $\pi^-$ and $\pi^+$ as a function of charge asymmetry with the tracking efficiency correction, for 30-40% central Au+Au collisions at 200 GeV. The errors are statistical only.

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Precise determination of the spin structure function g(1) of the proton, deuteron and neutron.

The HERMES collaboration Airapetian, A. ; Akopov, N. ; Akopov, Z. ; et al.

Phys.Rev.D 75 (2007) 012007, 2007.

Inspire Record 726689 DOI 10.17182/hepdata.11211

Precise measurements of the spin structure functions of the proton $g_1^p(x,Q^2)$ and deuteron $g_1^d(x,Q^2)$ are presented over the kinematic range $0.0041 \leq x \leq 0.9$ and $0.18 $ GeV$^2$ $\leq Q^2 \leq 20$ GeV$^2$. The data were collected at the HERMES experiment at DESY, in deep-inelastic scattering of 27.6 GeV longitudinally polarized positrons off longitudinally polarized hydrogen and deuterium gas targets internal to the HERA storage ring. The neutron spin structure function $g_1^n$ is extracted by combining proton and deuteron data. The integrals of $g_1^{p,d}$ at $Q^2=5$ GeV$^2$ are evaluated over the measured $x$ range. Neglecting any possible contribution to the $g_1^d$ integral from the region $x \leq 0.021$, a value of $0.330 \pm 0.011\mathrm{(theo.)}\pm0.025\mathrm{(exp.)}\pm 0.028$(evol.) is obtained for the flavor-singlet axial charge $a_0$ in a leading-twist NNLO analysis.

2 data tables match query

Table 7

The measured and Born asymmetries for the proton target at the average values of the average values of X, Y,and Q**2 in 45 bins. DSYS includes the 5.2 PCT normalization uncertainty.

Table 8

The measured and Born asymmetries for the deuterium target at the average values of the average values of X, Y,and Q**2 in 45 bins. DSYS includes the 5 PCT normalization uncertainty.

CHARGE PROPERTIES OF ANNIHILATION EXCLUSIVE REACTIONS IN anti-p p INTERACTIONS AT 32-GeV/c

Bogolyubsky, M.Yu. ; Kiryunin, A.E. ; Kotova, A.I. ; et al.

Yad.Fiz. 45 (1987) 1667, 1987.

Inspire Record 234595 DOI 10.17182/hepdata.10409

None

1 data table match query

Table 1

No description provided.

ANGULAR AND ENERGY CHARACTERISTICS OF SECONDARY CHARGED PARTICLES FROM ANTI-PROTON PROTON INTERACTIONS AT 22.4-GEV/C MOMENTUM

Boos, E.G. ; Ermilova, D.I. ; Samoilov, V.V. ; et al.

Alma Ata Inst. High Energy Phys. Acad. Sci. - 85-04 (rec.Jul.86) 19 p, 1984.

Inspire Record 210833 DOI 10.17182/hepdata.13427

None

1 data table match query

Table 1

No description provided.

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THE OBSERVATION OF THE ASYMMETRY IN THE REACTION pi- polarized p ---> pi0 X AT THE ANGLE 90-degrees IN cms AT 40-GeV/c

OBSERVATION OF THE ASYMMETRY IN THE REACTION pi- polarized p ---> omega n AT 40-GeV/c

MEASUREMENT OF ASYMMETRY IN THE REACTION pi- polarized p ---> K0 LAMBDA AT 40-GeV/c

AZIMUTHAL CORRELATIONS BETWEEN SECONDARY CHARGED HADRONS IN K- p INTERACTIONS AT 32-GeV

Production of Particles With Big Transverse Momenta in $\pi^-$ Meson - Nucleon and $\pi^-$ Meson - Nucleus Interactions at 40-{GeV}/$c$

SYSTEMATICS IN THE TRANSVERSE MOMENTUM DISTRIBUTIONS AND AZIMUTHAL CORRELATIONS IN THE INCLUSIVE K+ p REACTIONS AT 32-GeV/c

Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions

Precise determination of the spin structure function g(1) of the proton, deuteron and neutron.

CHARGE PROPERTIES OF ANNIHILATION EXCLUSIVE REACTIONS IN anti-p p INTERACTIONS AT 32-GeV/c

ANGULAR AND ENERGY CHARACTERISTICS OF SECONDARY CHARGED PARTICLES FROM ANTI-PROTON PROTON INTERACTIONS AT 22.4-GEV/C MOMENTUM