Elsevier

Nuclear Physics B

Volume 333, Issue 1, 19 March 1990, Pages 1-47
Nuclear Physics B

Measurements of the nucleon structure function in the range 0.002 < x < 0.17 and 00.2 < Q2 < 8 GeV2 in deuterium, carbon and calcium

https://doi.org/10.1016/0550-3213(90)90221-XGet rights and content

Abstract

Small angle scattering of 280 GeV positive muons by deuterium, carbon and calcium has been measured at scattering angles down to 2 mrad. The nucleon structure function F2 extracted from deuterium does not show a significant x dependence in the measured range of Q2 and its Q2 dependence is linear in logQ2. For calcium, a depletion of F2 is observed at low x by 30% as compared with the values at x = 0.1 where F2(Ca) and F2 (D) are not significantly different. This depletion is attributed to shadowing. The carbon structure function exhibits a similar, but less pronounced, x dependence. Such behaviour is observed to be independent of Q2. The data are consistent with those obtained from other charged lepton experiments both at similar and higher values of x and Q2 and considerably extend the range of the measurements down to the low values of x to be measured in forthcoming experiments at HERA.

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    Partly supported by CPBP.01.09.

    a

    University of Warsaw, Poland.

    b

    Now at MPI für Kernphysik, Heidelberg, FRG.

    Deceased.

    c

    Now at TESA S.A., Renens, Switzerland.

    d

    Now at DESY, Hamburg, FRG.

    e

    Now at British Telecom, London, UK.

    f

    Now at RAL, Chilton, Didcot, UK.

    g

    Now at Jet, Joint Undertaking, Abingdon, UK.

    h

    Permanent address: Central Research Institute for Physics, Hungarian Academy of Science, Budapest, Hungary.

    i

    Now at Institute of Nuclear Physics, Krakow, Poland.

    j

    Now at University of Manchester, UK.

    k

    Now at CERN, Genèva, Switzerland.

    Now at Krup Atlas Elektronik GmbH, Bremen, FRG.

    m

    Now at Laboratoire de l'Accélérateur Linéaire, Université de Paris-Sud, Orsay, France.

    n

    Now at Beiersdorf AG, Hamburg, FRG.

    o

    Now at SLAC, Stanford, California, USA.

    p

    How at FNAL, Batavia, Illinois, USA.

    q

    Institute for Nuclear Studies, Warsaw, Poland.

    r

    Now at NRC, Ottawa, Canada.

    s

    Now at GEI, Darmstadt, FRG.

    t

    Now at University of Melbourne, Parkville, Victoria, Australia.

    u

    Now at Universidad Nacional, Mar de Plata, Argentina.

    v

    Now at University of Durham, UK.

    w

    Now at University of California (Riverside), USA.

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