Single particle spectra in deep inelastic scattering
as a probe of small x dynamics
Department of Physics, University of Durham, Durham, DH1 3LE, UK
Received: 4 May 1998 / Published online: 21 August 1998
We study the transverse momentum (pT) spectrum of charged particles produced in deep inelastic scattering (DIS) at small Bjorken x in the central region between the current jet and the proton remnants. We calculate the spectrum at large pT with the BFKL resummation included and then repeat the calculation with it omitted. We find that data favour the former. We normalize our BFKL predictions by comparing with HERA data for DIS containing a forward jet. The shape of the x distribution of DIS + jet data is also well described by BFKL dynamics.