Phys. Rev. D
54,
3006–3056
(1996)
Proton and deuteron structure functions in muon scattering at 470 GeV
M. R. Adams et al.
Show All Authors/Affiliations
Hide All Authors/Affiliations
M. R. Adams6, S. Aïd10,*, P. L. Anthony9,†, D. A. Averill6, M. D. Baker11, B. R. Baller4, A. Banerjee15,‡, A. A. Bhatti16,§, U. Bratzler16, H. M. Braun17, T. J. Carroll12, H. L. Clark14,**, J. M. Conrad5,††, R. Davisson16, I. Derado12, F. S. Dietrich9, W. Dougherty16, T. Dreyer1, V. Eckardt12, U. Ecker17,‡‡, M. Erdmann1,a, G. Y. Fang5,b, J. Figiel8, R. W. Finlay14, H. J. Gebauer12, D. F. Geesaman2, K. A. Griffioen15,c, R. S. Guo6,d, J. Haas1, C. Halliwell6, D. Hantke12,e, K. H. Hicks14, H. E. Jackson2, D. E. Jaffe6,f, G. Jancso7, D. M. Jansen16,a, Z. Jin16, S. Kaufman2, R. D. Kennedy3,g, E. R. Kinney2,h, H. G. E. Kobrak3, A. V. Kotwal5,††, S. Kunori10, J. J. Lord16, H. J. Lubatti16, D. McLeod6, P. Madden3, S. Magill6,i, A. Manz12, H. Melanson4, D. G. Michael5,j, H. E. Montgomery4, J. G. Morfin4, R. B. Nickerson5,k, J. Novak13,l, S. O'Day10,m, K. Olkiewicz8, L. Osborne11, R. Otten17, V. Papavassiliou2,n, B. Pawlik8, F. M. Pipkin5,o, D. H. Potterveld2, E. J. Ramberg10,m, A. Röser17,p, J. J. Ryan11, C. W. Salgado4,q, A. Salvarani3,r, H. Schellman13, M. Schmitt5,s, N. Schmitz12, G. Siegert1,t, A. Skuja10, G. A. Snow10, S. Söldner-Rembold12,u, P. Spentzouris13,††, H. E. Stier1,o, P. Stopa8, R. A. Swanson3, H. Venkataramania13, M. Wilhelm1,v, Richard Wilson5, W. Wittek12, S. A. Wolbers4, A. Zghiche2, and T. Zhao16
1Albert-Ludwigs-Universität Freiburg, D-79104, Freiburg, Germany
2Argonne National Laboratory, Argonne, Illinois 60439
3University of California, San Diego, California 92093
4Fermi National Accelerator Laboratory, Batavia, Illinois 60510
5Harvard University, Cambridge, Massachusetts 02138
6University of Illinois, Chicago, Illinois 60680
7KFKI Research Institute for Particle and Nuclear Physics of the Hungarian Academy of Sciences, H-1525 Budapest, Hungary
8Institute for Nuclear Physics, Krakow, Poland
9Lawrence Livermore National Laboratory, Livermore, California 94551
10University of Maryland, College Park, Maryland 20742
11Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
12Max-Planck-Institut für Physik, Munich, Germany
13Northwestern University, Evanston, Illinois 60208
14Ohio University, Athens, Ohio 45701
15University of Pennsylvania, Philadelphia, Pennsylvania 19104
16University of Washington, Seattle, Washington 98195
17University of Wuppertal, Wuppertal, Germany
Received 9 February 1996; published in the issue dated 1 September 1996
The proton and deuteron structure functions F2p and F2d are measured in inelastic muon scattering with an average beam energy of 470 GeV. The data were taken at Fermilab experiment E665 during 1991 and 1992 using liquid hydrogen and deuterium targets. The F2 measurements are reported in the range 0.0008<x<0.6 and 0.2<Q2<75 GeV2. These are the first precise measurements of F2 in the low x and Q2 range of the data. In the high x range of the data where they overlap in x and Q2 with the measurements from NMC, the two measurements are in agreement. The E665 data also overlap in x with the DESY HERA data, and there is a smooth connection in Q2 between the two data sets. At high Q2 the E665 measurements are consistent with QCD-evolved leading twist structure function models. The data are qualitatively described by structure function models incorporating the hadronic nature of the photon at low Q2. The Q2 and the W dependence of the data measure the transition in the nature of the photon between a pointlike probe at high Q2 and a hadronic object at low Q2.
© 1996 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.54.3006
DOI:
10.1103/PhysRevD.54.3006
PACS:
13.60.Hb, 12.38.Qk, 12.40.Nn, 14.20.Dh
*Present address: University of Hamburg, D-22603 Hamburg, Germany. †Present address: SLAC, Stanford, CA 94309. ‡Present address: University of Michigan, Ann Arbor, MI 48109. §Present address: The Rockefeller University, New York, NY 10021. **Present address: Texas A&M University, College Station, TX 77843. ††Present address: Columbia University, New York, NY 10027. ‡‡Present address: Jenfelderstr. 147, D-22045 Hamburg, Germany. aPresent address: Heidelberg University, D-69120, Heidelberg, Germany. bPresent address: Dept. of Medical Physics, University of Wisconsin, Madison, WI 53706. cPresent address: College of William and Mary, Williamsburg, VA 23187. dPresent address: Institute of Physics, Academia Sinica, Nankang, Taipei, Taiwan. ePresent address: GSF, Forschungszentrum fuer Umwelt und Gesundheit GmbH, D-85764 Oberschleissheim, Germany. fPresent address: SCRI, Florida State University, Tallahassee, FL 32606. gPresent address: Rutgers University, Piscataway, NJ 08855. hPresent address: University of Colorado, Boulder, CO 80309. iPresent address: Argonne National Laboratory, Argonne, IL 60439. jPresent address: California Institute of Technology, Pasadena, CA 91125. kPresent address: Oxford University, Oxford OX1 3RH, United Kingdom. lPresent address: Yale University, New Haven, CT 06511. mPresent address: Fermi National Accelerator Laboratory, Batavia, IL 60510. nPresent address: New Mexico State University, Las Cruces, NM 88003. oDeceased. pPresent address: Klinikum Barmen, Abt. Radiologie, D-42283 Wuppertal, Germany. qPresent address: CEBAF, Newport News, VA 23606. rPresent address: AT&T Bell Labs, 2000 North Naperville Road, Naperville, IL 60540. sPresent address: Dept. of Physics, University of Wisconsin, Madison, WI 53706. tPresent address: University of Wuppertal, D-42119 Wuppertal, Germany. uPresent address: Albert-Ludwigs-Universität Freiburg, D-79104 Freiburg, Germany. vPresent address: Hoffmann-LaRoche, CH-4002 Basel, Switzerland.
|
|
