The HERMES experiment

Milner, Richard G.
June 2000
AIP Conference Proceedings;2000, Vol. 512 Issue 1, p339
Academic Journal
The study of the spin structure of the nucleon is a fundamental problem in strong interaction physics. The HERMES experiment at DESY, Hamburg, Germany is carrying out measurements to probe the spin structure of the nucleon using a new technique. Polarized internal gas targets of hydrogen, deuterium, and [sup 3]He are used with the 27.5 GeV longitudinally polarized positron (or electron) beam of the HERA collider to measure both inclusive and semi-inclusive spin-dependent deep-inelastic scattering from the nucleon. In addition, HERMES has observed a negative spin asymmetry in the photoproduction of hadron pairs with high transverse momenta. This is interpreted as the first direct experimental evidence for a positive gluon polarization in the nucleon. The azimuthal single-spin asymmetry measured in semi-inclusive pion production at HERMES is presented and interpreted as an effect of a new T-odd fragmentation function. HERMES also has carried out precision measurements of the ratios of unpolarized nuclear cross-sections. The data indicate a sizable nuclear dependence in the ratio of longitudinal to transverse cross-sections at low Q[sup 2]. © 2000 American Institute of Physics.


Related Articles

  • An Inscribed Astragalus with a Dedication to Hermes. Bar-Oz, Guy // Near Eastern Archaeology;Dec2001, Vol. 64 Issue 4, p215 

    Focuses on an inscribed astragalus with a dedication to Hermes found from the Roman-Hellenistic fortress of Sha'ar-Ha'amakim, Israel. Absence of burning signs or cut marks on the astragalus; Retrieval of astragalus bones in large numbers in ancient burials; Use of astragali for games.

  • Hermes and the lyre.  // Calliope;Jan/Feb91, Vol. 1 Issue 3, p35 

    Discusses how Hermes, son of the mythical king of the Greek gods Zeus, discovered how to construct a lyre, while only hours old.

  • HERMES THE INTERPRETER. Santayana, George // Soliloquies in England & Later Soliloquies;1922, p259 

    The author expresses his love for Greek god Hermes and explains that he is kind and humane and does not preach or threaten.

  • Fabulous Firsts: Greece. Dunn, John F. // Mekeel's & Stamps Magazine;04/14/2000, Vol. 186 Issue 15, p38 

    Offers a look at the first postage stamp issued by Greece in October 1861 that features the head of Hermes, messenger of the gods.

  • Fast Feet! Kelley, Stephanie // Hopscotch;Oct/Nov2011, Vol. 23 Issue 3, p44 

    The article focuses on Hermes, a mythological god known for his swiftness and uses the symbol of the flying foot.

  • The Inventive: HERMES.  // Calliope;Jul/Aug2008, Vol. 18 Issue 10, p20 

    The article features the messenger of the gods Hermes, the son of Zeus and the nymph Maia, who is admired for his creativity in Greek mythology.

  • Hermes "dio dell'albero" tra documentazione micenea e tradizione greca. Pisano, Carmine // Studi e Materiali di Storia delle Religioni;2011, Vol. 77 Issue 1, p187 

    No abstract available.

  • BMCR Books Received (August 2009).  // Bryn Mawr Classical Review;2009, Issue 9, p1 

    The article lists several books received, including "The Healing Power of Ancient Literature," edited by Stephen Bretman and Lois Parker, "Reading Homer: Film and Text," edited by Kostas Myrsiades, and "The Arabic Hermes: From Pagan Sage to Prophet of Science," by Kevin van Bladel.

  • Head of a Herm.  // Apollo: The International Magazine for Collectors;Apr2013, Vol. 177 Issue 608, p39 

    An image is presented of an ancient Greek head of a herm sculpted in white marble.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics