3.74  1.13 0.05     \    #sqrt(s)  <N> d(stat+sys)
   3.75  1.18 0.04      |
   5.28  1.70 0.07      |
   5.29  1.81 0.06      |
   7.43  2.27 0.07       >  ZEUS
   7.48  2.44 0.14      |
  10.49  3.00 0.23      |
  14.70  3.77 0.26      |
  14.87  3.98 0.37      |
  21.04  4.59 0.40      |
  29.38  5.26 0.39      |
  42.02  6.01 0.46      |
  45.50  5.76 0.29      |
  59.22  7.10 0.70     /
   3.63  1.18 0.07     \
   4.12  1.38 0.08      |
   5.23  1.62 0.08      |
   6.90  2.19 0.12      |
   8.20  2.59 0.16      |
   9.32  3.16 0.25       >  H1
  12.5   3.65 0.32      |
  14.6   4.13 0.34      |
  17.9   4.05 0.34      |
  25.0   5.23 0.43      |
  41.2   7.32 0.65     /
  12.3   3.39 0.09  *  \
  14.5   3.89 0.10  *   |
  18.0   4.41 0.12  *   |
  25.0   5.21 0.13  *    >  H1 (2007)
  36.6   6.22 0.17  *   |
  58.5   7.37 0.22  *   |
 102.0   8.11 0.55  *  / 
  

Notes: 
  The errors given are the quadratically added statistical and systematic errors.
  The measurements have been performed in the current fragmentation region of
  the Breit frame.
* A correlated error for H1 (2007) data coming from the electron energy scale 
* uncertainty is not included in the error bars shown. H1 (2007) data do not
* include charged particles from decays of K0s and Lambda.
  Starred entries have been updated since the last edition of RPP.

References:
  ZEUS: J. Breitweg et al., Eur. Phys. J. C11, 251 (1999)
  ZEUS: S. Chekanov et al., Phys. Lett.  B510,  36 (2001)
  H1:   C. Adloff et al.,   Nucl. Phys.  B504,   3 (1997)             
* H1:   F.D. Aaron et al.,  Phys. Lett.  B654, 148 (2007)