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hep-ex 1

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Cross Section 1
Electron production 1
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E+ P --> E+ J/PSI P 1
E+ P --> E+ PI+ PI- P 1
E+ P --> E+ RHO0 P 1
GAMMA P --> J/PSI P 1
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GAMMA* P --> J/PSI P 1
GAMMA* P --> PI+ PI- P 1
GAMMA* P --> RHO0 P 1

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CM Energies (GeV)

0.0 ≤ √s < 1.0
1.0 ≤ √s < 2.0
2.0 ≤ √s < 5.0
5.0 ≤ √s < 10.0
10.0 ≤ √s < 100.0
100.0 ≤ √s < 1000.0
1000.0 ≤ √s < 7000.0
7000.0 ≤ √s < 8000.0
8000.0 ≤ √s < 13000.0
√s ≥ 13000.0

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Authors

Abbiendi, G. 1
Abe, T. 1
Abramowicz, H. 1
Acosta, D. 1
Adamczyk, L. 1
Adamus, M. 1
Amelung, C. 1
Anselmo, F. 1
Antonioli, P. 1
Arneodo, M. 1

Exclusive electroproduction of rho0 and J / psi mesons at HERA

The ZEUS collaboration Breitweg, J. ; Chekanov, S. ; Derrick, M. ; et al.

Eur.Phys.J.C 6 (1999) 603-627, 1999.

https://inspirehep.net/literature/475083 Inspire Record 475083 DOI 10.17182/hepdata.44217 https://doi.org/10.17182/hepdata.44217

Exclusive production of $\rho^0$ and $J/\psi$ mesons in e^+ p collisions has been studied with the ZEUS detector in the kinematic range $0.25 < Q^2 < 50 GeV^2, 20 < W < 167 GeV$ for the $\rho^0$ data and $2 < Q^2 < 40 GeV^2, 50 < W < 150 GeV$ for the $J/\psi$ data. Cross sections for exclusive $\rho^0$ and $J/\psi$ production have been measured as a function of $Q^2, W$ and $t$. The spin-density matrix elements $r^{04}_{00}, r^1_{1-1}$ and $Re r^{5}_{10}$ have been determined for exclusive $\rho^0$ production as well as $r^{04}_{00}$ and $r^{04}_{1-1}$ for exclusive $J/\psi$ production. The results are discussed in the context of theoretical models invoking soft and hard phenomena.

32 data tables

Table 1

Exclusive RHO0 electro- and photo- production and cross sections as a function of Q**2 from the BPC data set.

Table 2

Exclusive RHO0 electro- and photo- production cross section as a function of W from the BPC data set.

Table 3

Exclusive RHO0 electro- and photo- production cross sections as a function of W from the DIS data set.

Table 4

Exclusive RHO0 electro- and photo- production cross sections as a function of W from the DIS data set.

Table 5

Exclusive RHO0 electro- and photo- production cross sections as a function of W from the DIS data set.

Table 6

Exclusive RHO0 electro- and photo- production cross sections as a function of W from the DIS data set.

Table 7

Exclusive J/PSI electro-production cross sections as a function of W from the DIS data set.

Table 8

Exclusive J/PSI photo-production cross sections as a function of W from theDIS data set.

Table 9

The powers of W found from the fit of the W dependence of the exclusive RHO0 photoproduction cross section to the W distributiuons in various Q**2 regions.

Table 10

The ratio of the J/PSI and RHO0 cross sections at two Q**2 values.

Table 11

Differential cross section for RHO0 production from the BPC data.

Table 12

Differential cross section for RHO0 production from the DIS data.

Table 13

Differential cross section for J/PSI production from the DIS data.

Table 14

The slope of the RHO0 dsig/dt distribution from the BPC data. The first point is the fit over the full data sample.. The second systematic (DSYS) error is the uncertainty arising from the subtraction of the proton dissiciation background.

Table 15

The slope of the RHO0 dsig/dt distribution from the BPC data. The second systematic (DSYS) error is the uncertainty arising from the subtraction of the proton dissiciation background.

Table 16

The slope of the RHO0 dsig/dt distribution from the BPC data. The second systematic (DSYS) error is the uncertainty arising from the subtraction of the proton dissiciation background.

Table 17

The slope of the RHO0 dsig/dt distribution from the DIS data. The first point is the fit over the full data sample.. The second systematic (DSYS) error is the uncertainty arising from the subtraction of the proton dissiciation background.

Table 18

The slope of the RHO0 dsig/dt distribution from the DIS data. The second systematic (DSYS) error is the uncertainty arising from the subtraction of the proton dissiciation background.

Table 19

The slope of the RHO0 dsig/dt distribution from the DIS data. The second systematic (DSYS) error is the uncertainty arising from the subtraction of the proton dissiciation background.

Table 20

The slope of the RHO0 dsig/dt distribution from the DIS data. The second systematic (DSYS) error is the uncertainty arising from the subtraction of the proton dissiciation background.

Table 21

The spin-density martix elements deletermined for various values of W and Q**2 for the RHO0 BPC sample.

Table 22

The spin-density martix elements deletermined for various values of W and Q**2 for the RHO0 BPC sample.

Table 23

The spin-density martix elements deletermined for various values of W and Q**2 for the RHO0 DIS sample.

Table 24

The spin-density martix elements deletermined for various values of W and Q**2 for the RHO0 DIS sample.

Table 25

Ratio of the cross sections for longitudinal and transverse photons from the DIS data as a function of Q**2.

Table 26

Ratio of the cross sections for longitudinal and transverse photons from the BPC data as a function of Q**2.

Table 27

Ratio of the cross sections for longitudinal and transverse photons from the BPC data as a function of W.

Table 28

Ratio of the cross sections for longitudinal and transverse photons from the DIS data as a function of W.

Table 29

The measured forward longitudinal cross section as a function of x for the DIS RHO0 data sample. NOTE FROM THE AUTHORS about figure 19_21:. Please note that the positive and negative error bars in the publication Eur.Phys.J. C6 (1999) 603 were inadvertently exchanged. In this table we give thetotal systematic uncertainty on each point as the quadratic sum of the correlat ed systematic error, shown as shaded bands in the publication, and the systematic error bars.

Table 30

The measured forward longitudinal cross section as a function of x for the DIS RHO0 data sample. See note above from the authors.

Table 31

The measured forward longitudinal cross section as a function of x for the DIS RHO0 data sample. See note above from the authors.

Table 32

The measured forward longitudinal cross section as a function of x for the DIS RHO0 data sample. See note above from the authors.

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