The clustering properties of the Universe at large-scales are currently being probed at various redshifts through several cosmological tracers and with diverse statistical estimators .
Here we use the three-point angular correlation function ( 3PACF ) to probe the baryon acoustic oscillation ( BAO ) features in the quasars catalogue from the twelfth data release of the Sloan Digital Sky Survey , with mean redshift \overline { z } = 2.225 , detecting the BAO imprint with a statistical significance of 2.9 \sigma , obtained using lognormal mocks .
Following a quasi model-independent approach for the 3PACF , we find the BAO transversal signature for triangles with sides \theta _ { 1 } = 1.0 ^ { \circ } and \theta _ { 2 } = 1.5 ^ { \circ } and the angle between them of \alpha = 1.59 \pm 0.17 rad , a value that corresponds to the angular BAO scale \theta _ { \mbox { \sc bao } } = 1.82 ^ { \circ } \pm 0.21 ^ { \circ } , in excellent agreement with the value found in a recent work ( \theta _ { \mbox { \sc bao } } = 1.77 ^ { \circ } \pm 0.31 ^ { \circ } ) applying the 2PACF to similar data .
Moreover , we performed two type of tests : one to confirm the robustness of the BAO signal in the 3PACF through random displacements in the dataset , and the other to verify the suitability of our random samples , a null test that in fact does not show any signature that could bias our results .