München 1997 – scientific programme

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T: Teilchenphysik

T 301: Strukturfunktionen III

T 301.2: Talk

Wednesday, March 19, 1997, 16:15–16:30, 225

Single particle signals of BFKL effects — •Sabine Christiane Lang¹, Alan D. Martin¹, and Jan Kwiecinski^2,1 — ¹Centre for Particle Theory, University of Durham — ²Institute of Nuclear Physics, Krakow

Charged particle transverse momentum spectra as a way of identifying BFKL dynamics at HERA are discussed. The idea is that because of the relaxation of the strong ordering of the transverse momenta k_T of the gluons along the chain more transverse energy E_T can be expected in the central region between the current jet and the proton remnants than would result from DGLAP evolution. Since, however, for a measurement of the HERA E_T flow it is not possible to distinguish between perturbative parton radiation and non-perturbative hadronization effects, we focus on the transverse momentum (p_T) spectra of charged particles in the final state in the central region at HERA. The advantage of this is that for p_T ≥ 4 GeV/c hadronization effects can be avoided because whereas parton radiation leads to a hard tail of the p_T distribution, the production of high-p_T particles from hadronization is suppressed.