Higher order leading logarithmic QED corrections to deep inelasticep scattering at very high energies

Kripfganz, J.; Möhring, H.‐J.; Spiesberger, H.

doi:10.1007/bf01549704

Cited by 37 publications

(43 citation statements)

References 9 publications

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“…In the first case the leptonic tensor is proportional to the collinear photon 4-momentum q 1β that leads to cancellation of the collinear region contribution due to the condition of gauge invariance, q 1β H µαβ = 0, while this cancellation does not take place for the normal beam polarization. Such behavior of the beam SSNA does not depend on value of Q The beam SSNA is amplified by the effect similar to the Compton peak in deep-inelastic scattering [22] but with replacement of leptonic and hadronic blocks. Namely, intermediate photon in the TPE box diagram can be collinear to the parent electron and carry 4-momentum that is enough to create a large invariant mass of the intermediate hadronic state.…”

Section: Discussionmentioning

confidence: 92%

Large logarithms in the beam normal spin asymmetry of elastic electron-proton scattering

Afanasev

Merenkov

2004

Phys. Rev. D

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We study a parity-conserving single-spin beam asymmetry of elastic electron-proton scattering induced by an absorptive part of the two-photon exchange amplitude. It is demonstrated that excitation of inelastic hadronic intermediate states by the consecutive exchange of two photons leads to logarithmic and double-logarithmic enhancement due to contributions of hard collinear quasi-real photons. The asymmetry at small electron scattering angles is expressed in terms of the total photoproduction cross section on the proton, and is predicted to reach the magnitude of 20-30 parts per million. At these conditions and fixed 4-momentum transfers, the asymmetry is rising logarithmically with increasing electron beam energy, following the high-energy diffractive behavior of total photoproduction cross section on the proton.

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Section: Discussionmentioning

confidence: 92%

Large logarithms in the beam normal spin asymmetry of elastic electron-proton scattering

Afanasev

Merenkov

2004

Phys. Rev. D

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“…Furthermore, contributions due to Z-exchange can be neglected in the realm of Q 2 ≤ 50 GeV 2 , i. e. , we make the replacements A c → e 2 c , B c → 0 (in eq. (22)- (29) in [7]). For the partonic structure functions, the simple relations…”

Section: Charm Excitation (Ce)mentioning

confidence: 98%

“…Following the formalism of ref. [7], the cross section for deep inelastic production of charm quarks via the photon gluon fusion (PGF) mechanism (e + g → e + c +c) reads:…”

Section: Formalismmentioning

confidence: 99%

“…The functions D e/e ,D e/e contain the factorized mass singularities from the electron line and are, up to O(α), given by [7] D e/e (x, Q 2 ) =D e/e (x,…”

Section: Formalismmentioning

confidence: 99%

“…For comparison with eq. (19), (20), we use equations (22)- (29) in [7], with the charm quark as the only massless parton (MP) in the initial state. Furthermore, contributions due to Z-exchange can be neglected in the realm of Q 2 ≤ 50 GeV 2 , i. e. , we make the replacements A c → e 2 c , B c → 0 (in eq.…”

Section: Charm Excitation (Ce)mentioning

confidence: 99%

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Leading log radiative corrections to deep inelastic production of heavy quarks

Schienbein

1998

Eur. Phys. J. C

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O(α) QED radiative corrections to neutral current deep inelastic production of heavy quarks are calculated in the leading log approximation and compared with the corresponding corrections assuming a massless charm parton. Besides the inclusive case, corrections to the semi-inclusive d 3 σ/dxdydz and the effect of z-cuts are studied. In the latter case, the massless corrections differ from the correct massive radiative corrections to deep inelastic heavy quark production by about 40%-10% for 0.2 z 0.5.

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Model Independent QED Corrections to the Processep → eX

et al. 1996

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We give an exhaustive presentation of the semi-analytical approach to the model independent leptonic QED corrections to deep inelastic neutral current lepton-nucleon scattering. These corrections include photonic bremsstrahlung from and vertex corrections to the lepton current of the order O(α) with soft photon exponentiation. A common treatment of these radiative corrections in several variablesleptonic, hadronic, mixed, Jaquet-Blondel variables -has been developed and double differential cross sections are calculated. In all sets of variables we use some structure functions, which depend on the hadronic variables and which do not have to be defined in the quark parton model. The remaining numerical integrations are twofold (for leptonic variables) or onefold (for all other variables). For the case of hadronic variables, all phase space integrals have been performed analytically. Numerical results are presented for a large kinematical range, covering fixed target as well as collider experiments at HERA or LEP⊗LHC, with a special emphasis on HERA physics. † Supported by the Heisenberg-Landau fund.

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Higher order leading logarithmic QED corrections to deep inelasticep scattering at very high energies

Abstract: Higher order electrotnagnetic radiativf' corrections to neutral current deep inelastic electron proton scattering are studi!"'d in collinear approxim\'ents for small :r and large y."Supported by Bunde~ministniu… Show more

Cited by 37 publications

References 9 publications

Large logarithms in the beam normal spin asymmetry of elastic electron-proton scattering

Large logarithms in the beam normal spin asymmetry of elastic electron-proton scattering

Leading log radiative corrections to deep inelastic production of heavy quarks

Model Independent QED Corrections to the Processep → eX

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