Photoproduction of D*± Mesons Associated with a Leading Neutron

ZEUS Collaboration

doi:10.1016/j.physletb.2004.03.076

Photoproduction of D^*± Mesons Associated with a Leading Neutron

ZEUS Collaboration

Department of Physics

Research output: Contribution to journal › Article › peer-review

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.

Original language	American English
Pages (from-to)	143-160
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	590
Issue number	3-4
DOIs	https://doi.org/10.1016/j.physletb.2004.03.076
State	Published - Jun 24 2004

Disciplines

Physics

Access to Document

10.1016/j.physletb.2004.03.076License: Unspecified

Photoproduction of D sup sup Mesons Associated with a LeadinFinal published version, 285 KBLicense: Unspecified

Cite this

@article{9579b77d69eb49648dd30286f8c40150,

title = "Photoproduction of D*± Mesons Associated with a Leading Neutron",

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",

author = "\{ZEUS Collaboration\} and Mattingly, \{Margarita C. K.\}",

year = "2004",

month = jun,

day = "24",

doi = "10.1016/j.physletb.2004.03.076",

language = "American English",

volume = "590",

pages = "143--160",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

number = "3-4",

}

TY - JOUR

T1 - Photoproduction of D*± Mesons Associated with a Leading Neutron

AU - ZEUS Collaboration

AU - Mattingly, Margarita C. K.

PY - 2004/6/24

Y1 - 2004/6/24

N2 - 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

AB - 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

UR - https://digitalcommons.andrews.edu/pubs/2201

U2 - 10.1016/j.physletb.2004.03.076

DO - 10.1016/j.physletb.2004.03.076

M3 - Article

VL - 590

SP - 143

EP - 160

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -