Measurement of the diffractive cross section in deep inelastic scattering

Zeus Collaboration

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Diffractive scattering of γp → X + N, where N is either a proton or a nucleonic system with MN < 4 GeV has been measured in deep inelastic scattering (DIS) at HERA. The cross section was determined by a novel method as a function of the γp c.m. energy W between 60 and 245 GeV and of the mass MX of the system X up to 15 GeV at average Q2 values of 14 and 31 GeV2. The diffractive cross section dσdi f f /dMX is, within errors, found to rise linearly with W. Parameterizing the W dependence by the form dσdi f f /dMX ∞ (W2)(2αIP - 2) the DIS data yield for the pomeron trajectory αIP = 1.23±0.02(stat)±0.04(syst) averaged over t in the measured kinematic range assuming the longitudinal photon contribution to be zero. This value for the pomeron trajectory is substantially larger than αIP extracted from soft interactions. The value of αIP measured in this analysis suggests that a substantial part of the diffractive DIS cross section originates from processes which can be described by perturbative QCD. From the measured diffractive cross sections the diffractive structure function of the proton F2 D(3) (β,Q2, xIP) has been determined, where β is the momentum fraction of the struck quark in the pomeron. The form F2 D(3) = constant·(1/xIP)a gives a good fit to the data in all β and Q2 intervals with a = 1.46 ± 0.04(stat) ± 0.08(syst).

Original languageEnglish
Pages (from-to)391-412
Number of pages22
JournalZeitschrift fur Physik C-Particles and Fields
Volume70
Issue number3
Publication statusPublished - 1996 Jan 1

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Inelastic scattering
inelastic scattering
cross sections
Protons
Trajectories
trajectories
nucleonics
protons
scattering cross sections
Momentum
Kinematics
kinematics
Photons
quantum chromodynamics
quarks
Scattering
intervals
momentum
photons
scattering

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Measurement of the diffractive cross section in deep inelastic scattering. / Zeus Collaboration.

In: Zeitschrift fur Physik C-Particles and Fields, Vol. 70, No. 3, 01.01.1996, p. 391-412.

Research output: Contribution to journalArticle

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abstract = "Diffractive scattering of γ∗p → X + N, where N is either a proton or a nucleonic system with MN < 4 GeV has been measured in deep inelastic scattering (DIS) at HERA. The cross section was determined by a novel method as a function of the γ∗p c.m. energy W between 60 and 245 GeV and of the mass MX of the system X up to 15 GeV at average Q2 values of 14 and 31 GeV2. The diffractive cross section dσdi f f /dMX is, within errors, found to rise linearly with W. Parameterizing the W dependence by the form dσdi f f /dMX ∞ (W2)(2αIP - 2) the DIS data yield for the pomeron trajectory αIP = 1.23±0.02(stat)±0.04(syst) averaged over t in the measured kinematic range assuming the longitudinal photon contribution to be zero. This value for the pomeron trajectory is substantially larger than αIP extracted from soft interactions. The value of αIP measured in this analysis suggests that a substantial part of the diffractive DIS cross section originates from processes which can be described by perturbative QCD. From the measured diffractive cross sections the diffractive structure function of the proton F2 D(3) (β,Q2, xIP) has been determined, where β is the momentum fraction of the struck quark in the pomeron. The form F2 D(3) = constant·(1/xIP)a gives a good fit to the data in all β and Q2 intervals with a = 1.46 ± 0.04(stat) ± 0.08(syst).",
author = "{Zeus Collaboration} and M. Derrick and D. Krakauer and S. Magill and D. Mikunas and B. Musgrave and Okrasinski, {J. R.} and J. Repond and R. Stanek and Talaga, {R. L.} and H. Zhang and Mattingly, {M. C.K.} and G. Bari and M. Basile and L. Bellagamba and D. Boscherini and A. Bruni and G. Bruni and P. Bruni and {Cara Romeo}, G. and G. Castellini and L. Cifarelli and F. Cindolo and A. Contin and M. Corradi and I. Gialas and P. Giusti and G. Iacobucci and G. Laurenti and G. Levi and A. Margotti and T. Massam and R. Nania and F. Palmonari and A. Polini and G. Sartorelli and {Zamora Garcia}, Y. and A. Zichichi and C. Amelung and A. Bornheim and J. Crittenden and T. Doeker and M. Eckert and L. Feld and A. Frey and M. Geerts and M. Grothe and H. Hartmann and K. Heinloth and L. Heinz and Park, {Sung Keun}",
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AU - Derrick, M.

AU - Krakauer, D.

AU - Magill, S.

AU - Mikunas, D.

AU - Musgrave, B.

AU - Okrasinski, J. R.

AU - Repond, J.

AU - Stanek, R.

AU - Talaga, R. L.

AU - Zhang, H.

AU - Mattingly, M. C.K.

AU - Bari, G.

AU - Basile, M.

AU - Bellagamba, L.

AU - Boscherini, D.

AU - Bruni, A.

AU - Bruni, G.

AU - Bruni, P.

AU - Cara Romeo, G.

AU - Castellini, G.

AU - Cifarelli, L.

AU - Cindolo, F.

AU - Contin, A.

AU - Corradi, M.

AU - Gialas, I.

AU - Giusti, P.

AU - Iacobucci, G.

AU - Laurenti, G.

AU - Levi, G.

AU - Margotti, A.

AU - Massam, T.

AU - Nania, R.

AU - Palmonari, F.

AU - Polini, A.

AU - Sartorelli, G.

AU - Zamora Garcia, Y.

AU - Zichichi, A.

AU - Amelung, C.

AU - Bornheim, A.

AU - Crittenden, J.

AU - Doeker, T.

AU - Eckert, M.

AU - Feld, L.

AU - Frey, A.

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AU - Grothe, M.

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AU - Park, Sung Keun

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N2 - Diffractive scattering of γ∗p → X + N, where N is either a proton or a nucleonic system with MN < 4 GeV has been measured in deep inelastic scattering (DIS) at HERA. The cross section was determined by a novel method as a function of the γ∗p c.m. energy W between 60 and 245 GeV and of the mass MX of the system X up to 15 GeV at average Q2 values of 14 and 31 GeV2. The diffractive cross section dσdi f f /dMX is, within errors, found to rise linearly with W. Parameterizing the W dependence by the form dσdi f f /dMX ∞ (W2)(2αIP - 2) the DIS data yield for the pomeron trajectory αIP = 1.23±0.02(stat)±0.04(syst) averaged over t in the measured kinematic range assuming the longitudinal photon contribution to be zero. This value for the pomeron trajectory is substantially larger than αIP extracted from soft interactions. The value of αIP measured in this analysis suggests that a substantial part of the diffractive DIS cross section originates from processes which can be described by perturbative QCD. From the measured diffractive cross sections the diffractive structure function of the proton F2 D(3) (β,Q2, xIP) has been determined, where β is the momentum fraction of the struck quark in the pomeron. The form F2 D(3) = constant·(1/xIP)a gives a good fit to the data in all β and Q2 intervals with a = 1.46 ± 0.04(stat) ± 0.08(syst).

AB - Diffractive scattering of γ∗p → X + N, where N is either a proton or a nucleonic system with MN < 4 GeV has been measured in deep inelastic scattering (DIS) at HERA. The cross section was determined by a novel method as a function of the γ∗p c.m. energy W between 60 and 245 GeV and of the mass MX of the system X up to 15 GeV at average Q2 values of 14 and 31 GeV2. The diffractive cross section dσdi f f /dMX is, within errors, found to rise linearly with W. Parameterizing the W dependence by the form dσdi f f /dMX ∞ (W2)(2αIP - 2) the DIS data yield for the pomeron trajectory αIP = 1.23±0.02(stat)±0.04(syst) averaged over t in the measured kinematic range assuming the longitudinal photon contribution to be zero. This value for the pomeron trajectory is substantially larger than αIP extracted from soft interactions. The value of αIP measured in this analysis suggests that a substantial part of the diffractive DIS cross section originates from processes which can be described by perturbative QCD. From the measured diffractive cross sections the diffractive structure function of the proton F2 D(3) (β,Q2, xIP) has been determined, where β is the momentum fraction of the struck quark in the pomeron. The form F2 D(3) = constant·(1/xIP)a gives a good fit to the data in all β and Q2 intervals with a = 1.46 ± 0.04(stat) ± 0.08(syst).

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