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Zhang Yang

Publications and source records attributed to Zhang Yang.

20 records · Page 2Linked to original sources

What can the final state particles in diffractive lepton-nucleon scattering tell us?

The colorless objects(s) in diffractive lepton-nucleon scattering in the small-$x_B$ region can be probed by examing the final state particles in such processes: (A) Perform multiplicity and/or energy factorial moment analyses, and check especially the $x_B$- and $Q^2$-dependence of the intermittency-indices. (B) Examine the diffractive structure function $F_2^{D(3)}(β,Q^2;x_P)$ as function of $x_P$ for different $β$ and $Q^2$. It is shown that such analyses and measurements can yield useful information on the hadronization process and on the intrinsic properties of the colorless objects. In particular, the observation of power-law distributions of $F_2^{D(3)}(β,Q^2;x_P)$ with respect to $x_P$ and with respect to $x_B$ --- independent of $β$ and $Q^2$-values may be considered as strong indication for the existence of self-organized criticality in gluon-cluster formation processes.

hep-ph↗

On the Influence of Momentum Conservation upon the Scaling Behaviour of Factorial Moments in High Energy Multiparticle Production

The experimental results on the falling down of scaled factorial moments in azimuthal variable $ϕ$ is studied in some detail. It is shown that this phenomenon may be referred to the influence of transverse momentum conservation. The existing experimental data from DELPHI, EMU08, NA22 and UA1 are successfully explained. Various methods are proposed to partly eliminate this influence and rule out the 'falling down' of factorial moments.

hep-ph↗