1 Erratum to: Eur. Phys. J. C (2014) 74:3084 DOI 10.1140/epjc/s10052-014-3084-z

Due to a mere transcription error, the content of Tables 7 and 8 under the columns labeled with (a) does not correspond to data points in the plots of Fig. 3, which give instead the correct results of the calculation.

The corrected Tables 7 and 8 are given below. In passing, we specified that the coefficients \(C_0\), \(C_1\), \(C_2\) and \(C_3\) given in Table 7 are measured in nb. Also the coefficients \(C_{0}\) and \(C_{1}\) given in Table 6 are measured in nb.

Table 7 \(C_0\), \(C_1\), \(C_2\) and \(C_3\) in the representation NLA\(_1\) with the BLM method, in both variants (a) and (b)

Moreover, we observe that the lower limits in the integrations over \(y_1\) and \(y_2\) of Eq. (13) were reported as \(y_{1,\mathrm{min}}=y_{2,\mathrm{min}}=0\), while the correct values, as used in the numerical analyses, are instead \(y_{1,\mathrm{min}}=y_{2,\mathrm{min}}=-4.7\).

Table 8 \(C_1/C_0\), \(C_2/C_0\), \(C_3/C_0\), \(C_2/C_1\), \(C_3/C_2\) in the representation NLA\(_1\) with the BLM method, in both variants (a) and (b)