Diffractive dijet cross-sections in photoproduction at HERA

Breitweg, J.; Derrick, M.; Krakauer, D.; Magill, S.; Mikunas, D.; Musgrave, B.; Repond, J.; Stanek, R.; Talaga, R.L.; Yoshida, R.

doi:10.1007/s100520050246

Diffractive dijet cross-sections in photoproduction at HERA

ZEUS

Collaboration

Apr, 1998

26 pages

Published in:

Eur.Phys.J.C 5 (1998) 41-56

e-Print:

hep-ex/9804013 [hep-ex]

DOI:

Report number:

DESY-98-045,
ANL-HEP-PR-98-40

Experiments:

DESY-HERA-ZEUS

View in:

pdfdatasets

reference search50 citations

Citations per year

Abstract:

Differential dijet cross sections have been measured with the ZEUS detector for photoproduction events in which the hadronic final state containing the jets is separated with respect to the outgoing proton direction by a large rapidity gap. The cross section has been measured as a function of the fraction of the photon (x_gamma^OBS) and pomeron (beta^OBS) momentum participating in the production of the dijet system. The observed x_gamma^OBS dependence shows evidence for the presence of a resolved- as well as a direct-photon component. The measured cross section d(sigma)/d(beta^OBS) increases as beta^OBS increases indicating that there is a sizeable contribution to dijet production from those events in which a large fraction of the pomeron momentum participates in the hard scattering. These cross sections and the ZEUS measurements of the diffractive structure function can be described by calculations based on parton densities in the pomeron which evolve according to the QCD evolution equations and include a substantial hard momentum component of gluons in the pomeron.

Note:

33 pages including 8 figures Report-no: DESY-98-045

positron p: colliding beams
positron p: inclusive reaction
jet: photoproduction
final state: (2jet)
rapidity: gap
diffraction: structure function
hard scattering
differential cross section: momentum dependence
transverse energy: dependence
rapidity dependence

References(50)

Figures(10)

Jet Structure in High Mass Diffractive Scattering

G. Ingelman
(
- CERN
)
,
P.E. Schlein
(
- UCLA
)

- Phys.Lett.B 152 (1985) 256-260
•
DOI:
- 10.1016/0370-2693(85)91181-5

Diffractive Hard Scattering

Edmond L. Berger
(
- Argonne
)
,
John C. Collins
(
- IIT, Chicago and
- Argonne
)
,
Davison E. Soper
(
- Oregon U.
)
,
George F. Sterman
(
- SUNY, Stony Brook and
- Princeton, Inst. Advanced Study
)

- Nucl.Phys.B 286 (1987) 704-728
•
DOI:
- 10.1016/0550-3213(87)90460-3

Hard Diffraction: Production of High p(T) Jets, W or Z, and Drell-Yan Pairs

A. Donnachie
(
- Manchester U.
)
,
P.V. Landshoff
(
- Cambridge U.
)

- Nucl.Phys.B 303 (1988) 634-652
•
DOI:
- 10.1016/0550-3213(88)90423-3

Pomeron structure function and diffraction dissociation of virtual photons in perturbative QCD

Nikolai Nikolaev
(
- ISI, Turin and
- Turin U. and
- INFN, Turin
)
,
Bronislav G. Zakharov
(
- Moscow State U.
)

- Z.Phys.C 53 (1992) 331-346
•
DOI:
- 10.1007/BF01597573

Unusual high p(T) jet events at HERA

A. Donnachie
(
- Manchester U.
)
,
P.V. Landshoff
(
- CERN
)

- Phys.Lett.B 285 (1992) 172-175
•
e-Print:
- hep-ph/9204222
•
DOI:
- 10.1016/0370-2693(92)91318-4

Diffractive hard scattering with a coherent pomeron

John C. Collins
(
- Penn State U.
)
,
Leonid Frankfurt
(
- Washington U., Seattle
)
,
Mark Strikman
(
- Penn State U.
)

- Phys.Lett.B 307 (1993) 161-168
•
e-Print:
- hep-ph/9212212
•
DOI:
- 10.1016/0370-2693(93)90206-W

Diffractive jet production in a simple model with applications to HERA

Arjun Berera
(
- Arizona U.
)
,
Davison E. Soper
(
- Oregon U.
)

- Phys.Rev.D 50 (1994) 4328-4340
•
e-Print:
- hep-ph/9403276
•
DOI:
- 10.1103/PhysRevD.50.4328

Evidence for Transverse Jets in High Mass Diffraction

UA8

Collaboration

•

R. Bonino
(
- UCLA
)

et al.

- Phys.Lett.B 211 (1988) 239,
- New York 1987: 2nd Blois:49
•
DOI:
- 10.1016/0370-2693(88)90840-4

Evidence for a superhard pomeron structure

UA8

Collaboration

•

A. Brandt
(
- UCLA
)

et al.

- Phys.Lett.B 297 (1992) 417-424
•
DOI:
- 10.1016/0370-2693(92)91281-D

Observation of events with a large rapidity gap in deep inelastic scattering at HERA

ZEUS

Collaboration

•

M. Derrick
(
- Argonne, PHY
)

et al.

- Phys.Lett.B 315 (1993) 481-493
•
DOI:
- 10.1016/0370-2693(93)91645-4

Observation of jet production in deep inelastic scattering with a large rapidity gap at HERA

ZEUS

Collaboration

•

M. Derrick
(
- Argonne, PHY
)

et al.

- Phys.Lett.B 332 (1994) 228-243
•
DOI:
- 10.1016/0370-2693(94)90883-4

Deep inelastic scattering events with a large rapidity gap at HERA

H1

Collaboration

•

T. Ahmed

et al.

- Nucl.Phys.B 429 (1994) 477-502
•
DOI:
- 10.1016/0550-3213(94)90151-1

First measurement of the deep inelastic structure of proton diffraction

H1

Collaboration

•

T. Ahmed

et al.

- Phys.Lett.B 348 (1995) 681-696
•
e-Print:
- hep-ex/9503005
•
DOI:
- 10.1016/0370-2693(95)00279-T

Measurement of the diffractive structure function in deep elastic scattering at HERA

ZEUS

Collaboration

•

M. Derrick
(
- Argonne, PHY
)

et al.

- Z.Phys.C 68 (1995) 569-584
•
e-Print:
- hep-ex/9505010
•
DOI:
- 10.1007/BF01565257

Measurement of the diffractive structure function F2(D(4)) at HERA

ZEUS

Collaboration

•

J. Breitweg
(
- Argonne
)

et al.

- Eur.Phys.J.C 1 (1998) 81-96
•
e-Print:
- hep-ex/9709021
•
DOI:
- 10.1007/s100520050063

Inclusive measurement of diffractive deep inelastic ep scattering

H1

Collaboration

•

C. Adloff

et al.

- Z.Phys.C 76 (1997) 613-629
•
e-Print:
- hep-ex/9708016
•
DOI:
- 10.1007/s002880050584

The parton model and perturbation theory

L.N. Lipatov
(
- St. Petersburg, INP
)

- Sov.J.Nucl.Phys. 20 (1975) 94-102,
- Yad.Fiz. 20 (1974) 181-198

Deep inelastic e p scattering in perturbation theory

V.N. Gribov
(
- St. Petersburg, INP
)
,
L.N. Lipatov
(
- St. Petersburg, INP
)

- Sov.J.Nucl.Phys. 15 (1972) 438-450,
- Yad.Fiz. 15 (1972) 781-807

Asymptotic Freedom in Parton Language

- Nucl.Phys.B 126 (1977) 298-318
•
DOI:
- 10.1016/0550-3213(77)90384-4

Calculation of the Structure Functions for Deep Inelastic Scattering and e+ e- Annihilation by Perturbation Theory in Quantum Chromodynamics.

Yuri L. Dokshitzer
(
- St. Petersburg, INP
)

- Sov.Phys.JETP 46 (1977) 641-653,
- Zh.Eksp.Teor.Fiz. 73 (1977) 1216-1240

Diffractive hard photoproduction at HERA and evidence for the gluon content of the pomeron

ZEUS

Collaboration

•

M. Derrick
(
- Argonne, PHY
)

et al.

- Phys.Lett.B 356 (1995) 129-146
•
e-Print:
- hep-ex/9506009
•
DOI:
- 10.1016/0370-2693(95)00803-S

Observation of diffractive $W$ boson production at the Tevatron

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 78 (1997) 2698-2703
•
e-Print:
- hep-ex/9703010
•
DOI:
- 10.1103/PhysRevLett.78.2698

Measurement of diffractive dijet production at the Tevatron

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 79 (1997) 2636-2641
•
DOI:
- 10.1103/PhysRevLett.79.2636

Diffractive production of jets and weak bosons, and tests of hard scattering factorization

Lyndon Alvero
(
- Penn State U.
)
,
John C. Collins
(
- Penn State U. and
- CERN
)
,
Juan Terron
(
- Madrid, Autonoma U.
)
,
Jim Whitmore
(
- Penn State U.
)

e-Print:
- hep-ph/9701374

The Photoproduction of Large Transverse Momentum Hadronic Jets

J.F. Owens
(
- Florida State U.
)

- Phys.Rev.D 21 (1980) 54,
- Phys.Rev.D21 (1980) 54-61 and Florida State Univ Tallahassee - FSU HEP 79-07-31 (79,REC.AUG) 33 P. (907704)
•
DOI:
- 10.1103/PhysRevD.21.54

1-25 of 50
1
2
25 / page