Measurement of the photon structure function F2ψ at Q2 from 7 to 70 (GeV/c)2

M. Althoff, W. Braunschweig, R. Gerhards, F. J. Kirschfink, H. U. Martyn, P. Rosskamp, W. Wallraff, B. Bock, J. Eisenmann, H. M. Fischer, H. Hartmann, W. Hillen, A. Jocksch, H. Kolanoski, H. Kück, V. Mertens, R. Wedemeyer, B. Foster, E. Bernardi, Y. EisenbergA. Eskreys, K. Gather, H. Hultschig, P. Joos, B. Klima, H. Kowalski, A. Ladage, B. Löhr, D. Lueke, P. Mättig, D. Notz, D. Revel, E. Ronat, D. Trines, T. Tymieniecka, R. Walczak, G. Wolf, W. Zeuner, E. Hilger, T. Kracht, H. L. Krasemann, J. Krüger, E. Lohrmann, G. Poelz, K. U. Pösnecker, D. M. Binnie, P. J. Dornan, D. A. Garbutt, C. Jenkins, W. G. Jones, J. K. Sedgbeer, D. Su, J. Thomas, W. A.T.Wan Abdullah, F. Barreiro, E. Ros, M. G. Bowler, P. Bull, R. J. Cashmore, P. Dauncey, R. Devenish, G. Heath, D. J. Mellor, S. L. Lloyd, G. E. Forden, J. C. Hart, D. K. Hasell, D. H. Saxon, S. Brandt, M. Dittmar, M. Holder, L. Labarga, B. Neumann, U. Karshon, G. Mikenberg, A. Montag, R. Mir, A. Shapira, G. Yekutieli, G. Baranko, A. Caldwell, M. Cherney, J. M. Izen, S. Ritz, D. Strom, M. Takashima, H. Venkataramania, E. Wicklund, Sau Lan Wu, G. Zobernig

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Abstract

We have measured the process e+e-→e+e-+hadrons, where one of the scattered electrons was detected at large angles, with Q2 ranging from 7 to 70 (VeV/c)2. The photon structure function F2 γ(x, Q2) was determined at an average Q2 of 23 (GeV/c)2. The measurements were compared to theoretical predictions of the Quark Parton Model and Quantum Chromodynamics. In both models a hadronic part was added. Within the errors the data are in agreement with the QPM using quark masses of 300 MeV/c2 for the light quarks. The data also agree with a QCD calculation including higher order corrections. A fit yielded a {Mathematical expression} value of 140-65 +190 MeV, where the errors include statistical and systematic uncertainties.

Original languageEnglish (US)
Pages (from-to)527-535
Number of pages9
JournalZeitschrift für Physik C Particles and Fields
Volume31
Issue number4
DOIs
StatePublished - Dec 1986

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Althoff, M., Braunschweig, W., Gerhards, R., Kirschfink, F. J., Martyn, H. U., Rosskamp, P., Wallraff, W., Bock, B., Eisenmann, J., Fischer, H. M., Hartmann, H., Hillen, W., Jocksch, A., Kolanoski, H., Kück, H., Mertens, V., Wedemeyer, R., Foster, B., Bernardi, E., ... Zobernig, G. (1986). Measurement of the photon structure function F2ψ at Q2 from 7 to 70 (GeV/c)2. Zeitschrift für Physik C Particles and Fields, 31(4), 527-535. https://doi.org/10.1007/BF01551073