2023 Impact factor 4.2
Particles and Fields
Eur. Phys. J. C 6, 587-602
DOI 10.1007/s100529901072

Measurement of leading proton and neutron production
in deep-inelastic scattering at HERA

H1 Collaboration

C. Adloff34 - et al.

34 Fachbereich Physik, Bergische Universität Gesamthochschule Wuppertal, Wuppertal, Germany

Received: 7 November 1998 / Published online: 25 January 1999

Deep-inelastic scattering events with a leading baryon have been detected by the H1 experiment at HERA using a forward proton spectrometer and a forward neutron calorimeter. Semi-inclusive cross sections have been measured in the kinematic region $2 \le
Q^2 \le 50\,{\mathrm GeV}^2$, $6\times 10^{-5}\le x\le
6\times10^{-3}$ and baryon $p_{\rm T} \le 200$MeV, for events with a final-state proton with energy $580 \le E^{\prime}
\le 740$GeV, or a neutron with energy $E^{\prime} \ge
160$GeV. The measurements are used to test production models and factorization hypotheses. A Regge model of leading baryon production which consists of pion, pomeron and secondary reggeon exchanges gives an acceptable description of both semi-inclusive cross sections in the region $0.7 \le E^{\prime}
/ E_{\rm p} \le 0.9$, where $E_{\rm p}$ is the proton beam energy. The leading neutron data are used to estimate for the first time the structure function of the pion at small Bjorken-x.

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