Welcome to the HERMES experiment at the DESY laboratory in Hamburg, Germany. HERMES is an experiment investigating the quark-gluon structure of matter: we study the spin structure of the nucleon. By nucleon, we refer to the protons and neutrons which are the fundamental components of all atomic nuclei. However, if you look a little closer, you find that these nucleons are not as fundamental as they might appear ... in fact, they are bound states, composite systems composed of even more fundamental constituents, namely quarks and gluons, held together by the strong force. And all of these particles have an important property called spin. The quarks have spin 1/2, the gluons have spin 1, and the nucleon itself has spin 1/2. The question we seek to answer at HERMES goes roughly like this: "How do the constituents of the nucleon conspire to produce its overall spin of 1/2?" We certainly know some things, but we haven't yet found the answer to that question. Our first data-taking run started in 1995, and will end in September, 2000. HERMES Run 2 will take place from 2001 - 2006.

Highlights from Hamburg

Als Einstieg für den Nicht-Physiker in die interessante Welt der Forschung bei HERMES empfehlen wir die Kurzeinführung: Hermes in fünf Minuten sowie einen Artikel der Süddeutschen Zeitung: "Wenn Quarks Pirouetten drehen".
The data are rolling in!
How much data have we collected? Our summary plots of total polarized data collection since 1996 are updated daily, and are available in postscript and gif format. You may also view our accumulated statistics weighted with beam and target polarization: postscript or gif.
Recent physics results from HERMES
You are invited to read our most recent publications and our public abstracts for subatomic aficinados.

HERMES Information

Hermes Physics
Hermes Search Engine - search this server's public pages
Hermes Datebook

DESY - Selected Links

HERA Experiments: our neighbors on the ring
MPY Home , Hera Status Plots and Numbers

High Energy and General Physics

Preprint Servers

Hamburg And The Rest Of The World

Useful Resources

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