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Selected recent HERMES results

  • Klaus Rith, on behalf of the HERMES collaboration
Laboratory physics programs and new facilities
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Abstract.

The first phase of HERMES data taking covers the years 1995 to 2000. Data were taken with longitudinally polarised 3He (1995), hydrogen (1996-1997) and deuterium (1998-2000) targets, but also with several other unpolarised targets (H2, D2, 3He, 4He, N2, Ne and Kr). Some selected results from this data taking period are discussed: the spin-dependent structure function g 1 from deuterium, which has been measured with high accuracy down to x = 0.0021; quark and antiquark helicity distributions from semi-inclusive deep-inelastic scattering on hydrogen and deuterium, which indicate that the antiquark distributions are consistent with zero and with each other and do not favour a substantial negative polarisation of the strange quark sea; and the first measurement of nuclear attenuation of identified fast charged and neutral pions, charged kaons, protons and antiprotons produced from nitrogen and krypton targets.

PACS codes.

13.60.-r -  13.87.Fh -  13.88.+e -  14.20.Dh -  14.40.-n -  14.65.-q -  

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Copyright information

© Società Italiana di Fisica, Springer-Verlag 2004

Authors and Affiliations

  • Klaus Rith, on behalf of the HERMES collaboration
    • 1
  1. 1.Physikalisches Institut, Universität Erlangen-Nürnberg, D-91058 Erlangen

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