Journal article
Photoproduction of D∗± mesons associated with a leading neutron
Physics letters. B, Vol.590(3-4), pp.143-160
06/24/2004
DOI: 10.1016/j.physletb.2004.03.076
Abstract
The photoproduction of D*±(2010) mesons associated with a leading neutron has been observed with the ZEUS detector in ep collisions at HERA using an integrated luminosity of 80 pb-1. The neutron carries a large fraction, xL>0.2, of the incoming proton beam energy and is detected at very small production angles, θn< 0.8 mrad, an indication of peripheral scattering. The D* meson is centrally produced with pseudorapidity η<1.5, and has a transverse momentum pT>1.9 GeV, which is large compared to the average transverse momentum of the neutron of 0.22 GeV. The ratio of neutron-tagged to inclusive D* production is 8.85±0.93(stat.) +0.48-0.61(syst.)% in the photon-proton center-of-mass energy range 130<W<280 GeV. The data suggest that the presence of a hard scale enhances the fraction of events with a leading neutron in the final state.
Details
- Title: Subtitle
- Photoproduction of D∗± mesons associated with a leading neutron
- Creators
- ZEUS CollabotationJ. Repond (Contributor)
- Resource Type
- Journal article
- Publication Details
- Physics letters. B, Vol.590(3-4), pp.143-160
- DOI
- 10.1016/j.physletb.2004.03.076
- ISSN
- 0370-2693
- eISSN
- 1873-2445
- Language
- English
- Date published
- 06/24/2004
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627346002771
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