Journal article
Measurement of the reaction γp→φp in deep inelastic e+p scattering at HERA
Physics letters. B, Vol.380(1-2), pp.220-234
07/1996
DOI: 10.1016/0370-2693(96)00603-X
Abstract
The production of ~b mesons in the reaction e+p --+ e+~bp (qb ~ K + K - ) , for 7 < Q2 < 25 GeV 2 and for virtual photon-proton centre of mass energies (W) in the range 42-134 GeV, has been studied with the ZEUS detector at HERA. When compared to lower energy data at similar Q2, the results show that the 7*P --~ ~bp cross section rises strongly with W. This behaviour is similar to that previously found for the y*p ~ pOp cross section. This strong dependence cannot be explained by production through soft pomeron exchange. It is, however, consistent with perturbative QCD expectations, where it reflects the rise of the gluon momentum density in the proton at small x. The ratio of tr(qb)fir(p°), which has previously been determined by ZEUS to be 0.065 + 0.013 (stat.) in photoproduction at a mean W of 70 GeV, is measured to be 0.18 + 0.05 (stat.) -4- 0.03 (syst.) at a mean Q2 of 12.3 GeV 2 and mean W of ~ 100 GeV and is thus approaching at large Q2 the value of 2 / 9 predicted from the quark charges of the vector mesons and a flavour independent production mechanism
Details
- Title: Subtitle
- Measurement of the reaction γp→φp in deep inelastic e+p scattering at HERA
- Creators
- ZEUS CollaborationJ. Repond (Contributor)U. Mallik (Contributor)
- Resource Type
- Journal article
- Publication Details
- Physics letters. B, Vol.380(1-2), pp.220-234
- DOI
- 10.1016/0370-2693(96)00603-X
- ISSN
- 0370-2693
- eISSN
- 1873-2445
- Language
- English
- Date published
- 07/1996
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627302202771
Metrics
2 Record Views