Dissociation of virtual photons in events with a leading proton at HERA

The ZEUS detector has been used to study dissociation of virtual photons in events with a leading proton, gamma^* p -> X p, in e^+p collisions at HERA. The data cover photon virtualities in two ranges, 0.031.5 GeV, where M_X is the mass of the hadronic final state, X. Events were required to have a leading proton, detected in the ZEUS leading proton spectrometer, carrying at least 90% of the incoming proton energy. The cross section is presented as a function of t, the squared four-momentum transfer at the proton vertex, Phi, the azimuthal angle between the positron scattering plane and the proton scattering plane, and Q^2. The data are presented in terms of the diffractive structure function, F_2^D(3). A next-to-leading-order QCD fit to the higher-Q^2 data set and to previously published diffractive charm production data is presented.

positron p: colliding beams
positron p: inclusive reaction
photon: exchange
photon: dissociation
p: leading particle
diffraction: structure function
parametrization
pomeron: exchange
cross section: momentum transfer
angular dependence

References(52)

Figures(0)

- Int.J.Mod.Phys.A 15 495

Fracture functions: An Improved description of inclusive hard processes in QCD

L. Trentadue
(
- Rome U., Tor Vergata and
- INFN, Rome
)
,
G. Veneziano
(
- CERN
)

- Phys.Lett.B 323 (1994) 201-211
•
DOI:
- 10.1016/0370-2693(94)90292-5

Proof of factorization for diffractive hard scattering

John C. Collins
(
- Penn State U.
)

- Phys.Rev.D 57 (1998) 3051-3056,
- Phys.Rev.D 61 (2000) 019902 (erratum)
•
e-Print:
- hep-ph/9709499
•
DOI:
- 10.1103/PhysRevD.61.019902

- Phys.Rev.D 53 0

Measurement of the Q**2 and energy dependence of diffractive interactions at HERA

ZEUS

Collaboration

•

S. Chekanov
(
- Argonne
)

et al.

- Eur.Phys.J.C 25 (2002) 169-187
•
e-Print:
- hep-ex/0203039
•
DOI:
- 10.1007/s10052-002-1003-1

Leading proton production in e+ p collisions at HERA

ZEUS

Collaboration

•

S. Chekanov
(
- Argonne
)

et al.

- Nucl.Phys.B 658 (2003) 3-46
•
e-Print:
- hep-ex/0210029
•
DOI:
- 10.1016/S0550-3213(03)00152-4

Measurement of the diffractive cross-section in deep inelastic scattering using ZEUS 1994 data

ZEUS

Collaboration

•

J. Breitweg
(
- Argonne
)

et al.

- Eur.Phys.J.C 6 (1999) 43-66
•
e-Print:
- hep-ex/9807010
•
DOI:
- 10.1007/PL00021606

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

Measurement of the t distribution in diffractive photoproduction at HERA

ZEUS

Collaboration

•

J. Breitweg
(
- Argonne
)

et al.

- Eur.Phys.J.C 2 (1998) 237-246
•
e-Print:
- hep-ex/9712019
•
DOI:
- 10.1007/s100520050135

Photoproduction with a leading proton at HERA

H1

Collaboration

•

C. Adloff

et al.

- Nucl.Phys.B 619 (2001) 3-21
•
e-Print:
- hep-ex/0106070
•
DOI:
- 10.1016/S0550-3213(01)00544-2

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

Vertex Triggering Using Time Difference Measurements in the ZEUS Central Tracking Detector

N. Harnew
(
- Bristol U. and
- Oxford U. and
- Rutherford
)
,
G.P. Heath
(
- Bristol U. and
- Oxford U. and
- Rutherford
)
,
M.D. Jeffs
(
- Bristol U. and
- Oxford U. and
- Rutherford
)
,
J. Nash
(
- Bristol U. and
- Oxford U. and
- Rutherford
)
,
G. Salmon
(
- Bristol U. and
- Oxford U. and
- Rutherford
)

et al.

- Nucl.Instrum.Meth.A 279 (1989) 290-296
•
DOI:
- 10.1016/0168-9002(89)91096-6

The Performance of the Zeus central tracking detector z-by-timing electronics in a transputer based data acquisition system

et al.

- Nucl.Phys.B Proc.Suppl. 32 (1993) 181-188,
- In *Como 1992, Proceedings, Advanced technology and particle physics* 181-188,
- Nucl. Phys. B, Proc. Suppl. 32 (1993) 181-188) and Oxford Univ. - OUNP-92-14 (92,rec.Oct.) 8 p
•
DOI:
- 10.1016/0920-5632(93)90023-Y

The Design and construction of the ZEUS central tracking detector

ZEUS

Collaboration

•

B. Foster
(
- Bristol U.
)

et al.

- Nucl.Instrum.Meth.A 338 (1994) 254-283
•
DOI:
- 10.1016/0168-9002(94)91313-7

Construction and beam test of the ZEUS forward and rear calorimeter

ZEUS

Collaboration

•

A. Andresen
(
- Hamburg U., Inst. Theor. Phys. II
)

et al.

- Nucl.Instrum.Meth.A 309 (1991) 101-142
•
DOI:
- 10.1016/0168-9002(91)90095-8

Beam tests of the ZEUS barrel calorimeter

et al.

- Nucl.Instrum.Meth.A 336 (1993) 23-52
•
DOI:
- 10.1016/0168-9002(93)91078-2

Measurement of the proton structure function F2 and sigma-tot (gamma* p) at low q**2 and very low x at HERA

ZEUS

Collaboration

•

J. Breitweg
(
- Argonne
)

et al.

- Phys.Lett.B 407 (1997) 432-448
•
e-Print:
- hep-ex/9707025
•
DOI:
- 10.1016/S0370-2693(97)00905-2

Measurement of the proton structure function F(2) at very low Q**2 at HERA

ZEUS

Collaboration

•

J. Breitweg
(
- Argonne
)

et al.

- Phys.Lett.B 487 (2000) 53-73
•
e-Print:
- hep-ex/0005018
•
DOI:
- 10.1016/S0370-2693(00)00793-0

The Presampler for the forward and rear calorimeter in the ZEUS detector

et al.

- Nucl.Instrum.Meth.A 382 (1996) 419-429,
- ICFA Instrum.Bull. 1996 (1996) F18-F37
•
e-Print:
- hep-ex/9609006
•
DOI:
- 10.1016/S0168-9002(96)00776-0

Experimental Study of Electron - Hadron Separation in Calorimeters Using Silicon Diodes

A. Dwurazny
(
- Cracow, INP
)
,
W. Krupinski
(
- Cracow, INP
)
,
G. Barbagli
(
- Florence U. and
- INFN, Florence
)
,
P.G. Pelfer
(
- Florence U. and
- INFN, Florence
)
,
D.G. Cassel
(
- DESY
)

et al.

- Nucl.Instrum.Meth.A 277 (1989) 176-186,
- Nucl. Instrum. Methods A277 (1989) 176-186 and Hamburg DESY - DESY 88-070 (88,rec.Jun.) 25 p
•
DOI:
- 10.1016/0168-9002(89)90550-0

Study of elastic $\rho^0$ photoproduction at HERA using the ZEUS leading proton spectrometer

ZEUS

Collaboration

•

M. Derrick
(
- Argonne
)

et al.

- Z.Phys.C 73 (1997) 253-268
•
e-Print:
- hep-ex/9609003
•
DOI:
- 10.1007/s002880050314

Measurement of total and partial photon proton cross-sections at 180-GeV center-of-mass energy

ZEUS

Collaboration

•

M. Derrick
(
- Argonne, PHY
)

et al.

- Z.Phys.C 63 (1994) 391-408
•
DOI:
- 10.1007/BF01580320

Luminosity measurement in the ZEUS experiment

et al.

- Acta Phys.Polon.B 32 (2001) 2025-2058

Neural network based electron identification in the ZEUS calorimeter

Halina Abramowicz
(
- Tel Aviv U.
)
,
Allen Caldwell
(
- Nevis Labs, Columbia U.
)
,
Ralph Sinkus
(
- Hamburg U.
)

- Nucl.Instrum.Meth.A 365 (1995) 508-517,
- Nucl. Instrum. Methods A365 (1995) 508-517, and Hamburg DESY - DESY-95-054 (95/03,rec.Apr.) 20 p
•
e-Print:
- hep-ex/9505004
•
DOI:
- 10.1016/0168-9002(95)00612-5

Measurement of the neutral current cross-section and F(2) structure function for deep inelastic e + p scattering at HERA

ZEUS

Collaboration

•

S. Chekanov
(
- Argonne, PHY
)

et al.

- Eur.Phys.J.C 21 (2001) 443-471
•
e-Print:
- hep-ex/0105090
•
DOI:
- 10.1007/s100520100749

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