Measurement of the tensor structure function b1 of the deuteron.
The Hermes experiment has investigated the tensor spin structure of the deuteron using the 27.6 GeV/c positron beam of DESY HERA. The use of a tensor-polarized deuteron gas target with only a negligible residual vector polarization enabled the first measurement of the tensor asymmetry A(d)zz and the tensor structure function b(d)1 for average values of the Bjorken variable 0.01< <x> <0.45 and of the negative of the squared four-momentum transfer 0.5 GeV2 < <Q2> <5 GeV2. The quantities A(d)zz and b(d)1 are found to be nonzero. The rise of b(d)1 for decreasing values of x can be interpreted to originate from the same mechanism that leads to nuclear shadowing in unpolarized scattering.
Airapetian
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Yerevan Physics Institute, 375036 Yerevan, Armenia.
Akopov
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Akopov
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Amarian
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Ammosov
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Andrus
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Aschenauer
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Augustyniak
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Avakian
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Avetissian
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Bailey
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Balin
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Baturin
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Beckmann
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Belostotski
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Bernreuther
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Bianchi
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Blok
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Böttcher
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Borissov
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Borysenko
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Bouwhuis
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Brack
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Brüll
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Bryzgalov
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Capitani
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Chen
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Chiang
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Ciullo
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Contalbrigo
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Dalpiaz
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De Leo
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Demey
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De Nardo
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De Sanctis
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Devitsin
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Di Nezza
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Dreschler
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Düren
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Ehrenfried
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Elalaoui-Moulay
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Elbakian
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Ellinghaus
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Elschenbroich
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Fabbri
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Fantoni
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Fechtchenko
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Felawka
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Fox
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Frullani
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Gapienko
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Gapienko
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Garibaldi
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Garrow
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Garutti
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Gaskell
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Gavrilov
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Gharibyan
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Graw
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Greeniaus
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Gregor
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Hartig
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Hasch
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Hertenberger
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Hesselink
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Hillenbrand
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Hoek
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Holler
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Hommez
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Iarygin
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Ivanilov
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Izotov
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Jackson
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Kaiser
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Kinney
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Korotkov
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Kozlov
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Lagamba
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Laziev
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Lenisa
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Liebing
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Lipka
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Lorenzon
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Lu
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Marianski
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Marukyan
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Masoli
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Mexner
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Meyners
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Miller
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Muccifora
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Negodaev
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Nowak
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Oganessyan
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Pickert
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Potashov
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Potterveld
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Raithel
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Reimer
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Reischl
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Rosner
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Rubin
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Schüler
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Seidl
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Shanidze
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Shutov
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Simani
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Vandenbroucke
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Weiskopf
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Yen
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