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Measurement of charm fragmentation fractions in photoproduction at HERA
Journal article   Open access   Peer reviewed

Measurement of charm fragmentation fractions in photoproduction at HERA

H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, R. Aggarwal, S. Antonelli, P. Antonioli, A. Antonov, M. Arneodo, O. Arslan, …
The journal of high energy physics, Vol.2013(9), pp.1-28
09/01/2013
DOI: 10.1007/JHEP09(2013)058
url
https://doi.org/10.1007/JHEP09(2013)058View
Published (Version of record) Open Access

Abstract

The production of D-0, D*(+), D+, D-s(+) and Lambda(+)(c) charm hadrons and their antiparticles in ep scattering at HERA has been studied with the ZEUS detector, using a total integrated luminosity of 372 pb(-1). The fractions of charm quarks hadronising into a particular charm hadron were derived. In addition, the ratio of neutral to charged D-meson production rates, the fraction of charged D mesons produced in a vector state, and the stangeness-suppression factor have been determined. The measurements have been performed in the photoproduction regime. The charm hadrons were reconstructed in the range of transverse momentum p T > 3.8GeV and pseudorapidity vertical bar eta vertical bar < 1.6. The charm fragmentation fractions are compared to previous results from HERA and from e(+)e(-) experiments. The data support the hypothesis that fragmentation is independent of the production process.
Physical Sciences Physics Physics, Particles & Fields Science & Technology

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