Measurement of the proton structure function F(2) at low Q**2 in QED Compton scattering at HERA

The proton structure function F_2(x,Q^2) is measured in inelastic QED Compton scattering using data collected with the H1 detector at HERA. QED Compton events are used to access the kinematic range of very low virtualities of the exchanged photon, Q^2, down to 0.5 GeV^2, and Bjorken x up to \sim 0.06, a region which has not been covered previously by inclusive measurements at HERA. The results are in agreement with the measurements from fixed target lepton-nucleon scattering experiments.

Note:

19 pages, 4 figures and 2 tables Report-no: DESY 04-083

electron p: colliding beams
electron p: inelastic scattering
quantum electrodynamics: Compton scattering
momentum transfer: low
p: structure function
x-dependence
momentum transfer dependence
transverse momentum: spectrum
H1
experimental results

References(48)

Figures(4)

High-Energy Inelastic e p Scattering at 6-Degrees and 10-Degrees

et al.

- Phys.Rev.Lett. 23 (1969) 930-934,
- In *Cahn, R.N., Goldhaber, G.: The experimental foundations of particle physics* 240-244
•
DOI:
- 10.1103/PhysRevLett.23.930

Test of Scale Invariance in High-Energy Muon Scattering

et al.

- Phys.Rev.Lett. 33 (1974) 1504
•
DOI:
- 10.1103/PhysRevLett.33.1504

Test of Scale Invariance in Ratios of Muon Scattering Cross-Sections at 150-GeV and 56-GeV

et al.

- Phys.Rev.Lett. 35 (1975) 898
•
DOI:
- 10.1103/PhysRevLett.35.898

Deep inelastic inclusive e p scattering at low x and a determination of alpha(s)

H1

Collaboration

•

C. Adloff

et al.

- Eur.Phys.J.C 21 (2001) 33-61
•
e-Print:
- hep-ex/0012053
•
DOI:
- 10.1007/s100520100720

Measurement and QCD analysis of neutral and charged current cross-sections at HERA

H1

Collaboration

•

C. Adloff

et al.

- Eur.Phys.J.C 30 (2003) 1-32
•
e-Print:
- hep-ex/0304003
•
DOI:
- 10.1140/epjc/s2003-01257-6

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

High Q2 neutral current cross-sections in e+ p deep inelastic scattering at s(1/2) = 318-GeV

ZEUS

Collaboration

•

S. Chekanov
(
- Argonne
)

et al.

- Phys.Rev.D 70 (2004) 052001
•
e-Print:
- hep-ex/0401003
•
DOI:
- 10.1103/PhysRevD.70.052001

A Measurement of the proton structure function f2 (x, q2) at low x and low q2 at HERA

H1

Collaboration

•

C. Adloff

et al.

- Nucl.Phys.B 497 (1997) 3-30
•
e-Print:
- hep-ex/9703012
•
DOI:
- 10.1016/S0550-3213(97)00301-5

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

Measurement of the proton structure function F2 at low x and low q**2 at HERA

ZEUS

Collaboration

•

M. Derrick
(
- Argonne, PHY
)

et al.

- Z.Phys.C 69 (1996) 607-620
•
e-Print:
- hep-ex/9510009
•
DOI:
- 10.1007/s002880050064

On the Investigation of the proton structure using QED Compton events in ep scattering

- Eur.Phys.J.C 31 (2003) 343-349
•
e-Print:
- hep-ph/0307116
•
DOI:
- 10.1140/epjc/s2003-01381-3

Determination of the longitudinal structure function at HERA from radiative events

M.W. Krasny
(
- Saclay and
- Cracow, INP
)
,
W. Placzek
(
- Jagiellonian U. and
- DESY
)
,
H. Spiesberger
(
- Hamburg U.
)

- Z.Phys.C 53 (1992) 687-694
•
DOI:
- 10.1007/BF01559748

On the measurement of the proton structure at small Q**2

- J.Phys.G 19 (1993) 1695-1703,
- J. Phys. G19 (1993) 1695-1703. and Hamburg DESY - DESY 93-097 (93/07,rec.Jul.) 13 p. C
•
DOI:
- 10.1088/0954-3899/19/10/029