Measurements of the QED structure of the photon

OPAL Collaboration

doi:10.1007/s100529900205

Measurements of the QED structure of the photon

OPAL Collaboration

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The structure of both quasi-real and highly virtual photons is investigated using the reaction e⁺e^- → e⁺e^-μ⁺μ^-, proceeding via the exchange of two photons. The results are based on the complete OPAL dataset taken at e⁺e^- centre-of-mass energies close to the mass of the Z boson. The QED structure function F^γ₂ and the differential cross-section dσ/dx for quasi-real photons are obtained as functions of the fractional momentum x from the muon momentum which is carried by the struck muon in the quasi-real photon for values of Q² ranging from 1.5 to 400 GeV². The differential cross-section dσ/dx for highly virtual photons is measured for 1.5 < Q² < 30 GeV² and 1.5 < P² < 20 GeV², where Q² and P² are the negative values of the four-momentum squared of the two photons such that Q² > P². Based on azimuthal correlations the QED structure functions F^γ_A and F^γ_B for quasi-real photons are determined for an average Q² of 5.4 GeV².

Original language	English
Pages (from-to)	409-425
Number of pages	17
Journal	European Physical Journal C
Volume	11
Issue number	3
DOIs	https://doi.org/10.1007/s100529900205
State	Published - 1 Jan 1999
Externally published	Yes

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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@article{673d9c54f6c8472e81481fc4d93184ee,

title = "Measurements of the QED structure of the photon",

abstract = "The structure of both quasi-real and highly virtual photons is investigated using the reaction e+e- → e+e-μ+μ-, proceeding via the exchange of two photons. The results are based on the complete OPAL dataset taken at e+e- centre-of-mass energies close to the mass of the Z boson. The QED structure function Fγ2 and the differential cross-section dσ/dx for quasi-real photons are obtained as functions of the fractional momentum x from the muon momentum which is carried by the struck muon in the quasi-real photon for values of Q2 ranging from 1.5 to 400 GeV2. The differential cross-section dσ/dx for highly virtual photons is measured for 1.5 < Q2 < 30 GeV2 and 1.5 < P2 < 20 GeV2, where Q2 and P2 are the negative values of the four-momentum squared of the two photons such that Q2 > P2. Based on azimuthal correlations the QED structure functions FγA and FγB for quasi-real photons are determined for an average Q2 of 5.4 GeV2.",

author = "{OPAL Collaboration} and G. Abbiendi and K. Ackerstaff and G. Alexander and J. Allison and N. Altekamp and Anderson, {K. J.} and S. Anderson and S. Arcelli and S. Asai and Ashby, {S. F.} and D. Axen and G. Azuelos and Ball, {A. H.} and E. Barberio and Barlow, {R. J.} and Batley, {J. R.} and S. Baumann and J. Bechtluft and T. Behnke and Bell, {K. W.} and G. Bella and A. Bellerive and S. Bentvelsen and S. Bethke and S. Betts and O. Biebel and A. Biguzzi and V. Blobel and Bloodworth, {I. J.} and P. Bock and J. B{\"o}hme and D. Bonacorsi and M. Boutemeur and S. Braibant and P. Bright-Thomas and L. Brigliadori and Brown, {R. M.} and Burckhart, {H. J.} and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and Charlton, {D. G.} and D. Chrisman and C. Ciocca and Clarke, {P. E.L.} and E. Clay and I. Cohen and R. Folman",

year = "1999",

month = jan,

day = "1",

doi = "10.1007/s100529900205",

language = "English",

volume = "11",

pages = "409--425",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "3",

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TY - JOUR

T1 - Measurements of the QED structure of the photon

AU - OPAL Collaboration

AU - Abbiendi, G.

AU - Ackerstaff, K.

AU - Alexander, G.

AU - Allison, J.

AU - Altekamp, N.

AU - Anderson, K. J.

AU - Anderson, S.

AU - Arcelli, S.

AU - Asai, S.

AU - Ashby, S. F.

AU - Axen, D.

AU - Azuelos, G.

AU - Ball, A. H.

AU - Barberio, E.

AU - Barlow, R. J.

AU - Batley, J. R.

AU - Baumann, S.

AU - Bechtluft, J.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bella, G.

AU - Bellerive, A.

AU - Bentvelsen, S.

AU - Bethke, S.

AU - Betts, S.

AU - Biebel, O.

AU - Biguzzi, A.

AU - Blobel, V.

AU - Bloodworth, I. J.

AU - Bock, P.

AU - Böhme, J.

AU - Bonacorsi, D.

AU - Boutemeur, M.

AU - Braibant, S.

AU - Bright-Thomas, P.

AU - Brigliadori, L.

AU - Brown, R. M.

AU - Burckhart, H. J.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlton, D. G.

AU - Chrisman, D.

AU - Ciocca, C.

AU - Clarke, P. E.L.

AU - Clay, E.

AU - Cohen, I.

AU - Folman, R.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - The structure of both quasi-real and highly virtual photons is investigated using the reaction e+e- → e+e-μ+μ-, proceeding via the exchange of two photons. The results are based on the complete OPAL dataset taken at e+e- centre-of-mass energies close to the mass of the Z boson. The QED structure function Fγ2 and the differential cross-section dσ/dx for quasi-real photons are obtained as functions of the fractional momentum x from the muon momentum which is carried by the struck muon in the quasi-real photon for values of Q2 ranging from 1.5 to 400 GeV2. The differential cross-section dσ/dx for highly virtual photons is measured for 1.5 < Q2 < 30 GeV2 and 1.5 < P2 < 20 GeV2, where Q2 and P2 are the negative values of the four-momentum squared of the two photons such that Q2 > P2. Based on azimuthal correlations the QED structure functions FγA and FγB for quasi-real photons are determined for an average Q2 of 5.4 GeV2.

AB - The structure of both quasi-real and highly virtual photons is investigated using the reaction e+e- → e+e-μ+μ-, proceeding via the exchange of two photons. The results are based on the complete OPAL dataset taken at e+e- centre-of-mass energies close to the mass of the Z boson. The QED structure function Fγ2 and the differential cross-section dσ/dx for quasi-real photons are obtained as functions of the fractional momentum x from the muon momentum which is carried by the struck muon in the quasi-real photon for values of Q2 ranging from 1.5 to 400 GeV2. The differential cross-section dσ/dx for highly virtual photons is measured for 1.5 < Q2 < 30 GeV2 and 1.5 < P2 < 20 GeV2, where Q2 and P2 are the negative values of the four-momentum squared of the two photons such that Q2 > P2. Based on azimuthal correlations the QED structure functions FγA and FγB for quasi-real photons are determined for an average Q2 of 5.4 GeV2.

UR - http://www.scopus.com/inward/record.url?scp=0001144815&partnerID=8YFLogxK

U2 - 10.1007/s100529900205

DO - 10.1007/s100529900205

M3 - Article

AN - SCOPUS:0001144815

VL - 11

SP - 409

EP - 425

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 3

ER -

Measurements of the QED structure of the photon

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