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Large Inclusive Charged Particle Distributions in Deep Inelastic Scattering Events at HERA

The ZEUS collaboration Derrick, M. ; Krakauer, D. ; Magill, S. ; et al.
Z.Phys.C 70 (1996) 1-16, 1996.
Inspire Record 402646 DOI 10.17182/hepdata.44930

A measurement of inclusive charged particle distributions in deep inelastic $ep$ scattering for $\gamma~* p$ centre-of-mass energies $75< W < 175$GeV and momentum transfer squared $10< Q~2 < 160$GeV$~2$ from the ZEUS detector at HERA is presented. The differential charged particle rates in the $\gamma~* p$ centre-of-mass system as a function of the scaled longitudinal momentum, $x_F$, and of the transverse momentum, $p_t~*$ and $<\!\!p_t~{*\,2}\!\!>\,\,$ , as a function of $x_F$, $W$ and $Q~2$ are given. Separate distributions are shown for events with (LRG) and without (NRG) a rapidity gap with respect to the proton direction. The data are compared with results from experiments at lower beam energies, with the naive quark parton model and with parton models including perturbative QCD corrections. The comparison shows the importance of the higher order QCD processes. Significant differences of the inclusive charged particle rates between NRG and LRG events at the same $W$ are observed. The value of $<\!\!p_t~{*\,2}\!\!>\,\,$ for LRG events with a hadronic mass $M_X$, which excludes the forward produced baryonic system, is similar to the $<\!\!p_t~{*\,2}\!\!>\,\,$ value observed in fixed target experiments at $W \approx M_X$.

11 data tables
Table 1

Differential multiplicites for NRG events.. XL is parallel to the virtual photon axis.

Table 2

Differential multiplicites for NRG events.. PT is relative to the virtual photon axis.

Table 3

Mean PT**2 for NRG events.. PT is relative to the virtual photon axis.

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Studies of Quark and Diquark Fragmentation Into Identified Hadrons in Deep Inelastic Muon - Proton Scattering

The European Muon collaboration Arneodo, M. ; Arvidson, A. ; Aubert, J.J. ; et al.
Phys.Lett.B 150 (1985) 458, 1985.
Inspire Record 206297 DOI 10.17182/hepdata.30438

None

19 data tables
Table 1

Backward Multiplicity.

Table 2

Forward Multiplicity.

Table 3

No description provided.

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Study of Transverse Momenta of Charged Hadrons Produced in Neutrino $p$ and Anti-neutrino $p$ Charged Current Interactions

The Birmingham-CERN-London-Munich-Oxford collaboration Jones, G.T. ; Kennedy, B.W. ; Middleton, R.P. ; et al.
Z.Phys.C 25 (1984) 121, 1984.
Inspire Record 201590 DOI 10.17182/hepdata.16211

Data from a neutrino and antineutrino hydrogen experiment with BEBC are used to investigate transverse properties of the produced charged hadrons. Measurements are presented on average transverse momenta of charged pions as functions of Feynman-x and the hadronic mass, on the transverse momentum flow within an event and on jet-related quantities. The main features of the data are well described by the LUND model. The data favour a version of the model in which soft gluon effects are included and the primordial transverse momentum of the quarks in the proton is small. Effects from 1st order QCD (hard gluon emission) are negligible.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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