Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 44: Fundamentale Symmetrien
HK 44.6: Gruppenbericht
Mittwoch, 23. März 2011, 18:00–18:30, HS2
Search for Spin-dependent Short-range Interaction Using a 3He/129Xe-Co-magnetometer — •Kathlynne Tullney1, Claudia Gemmel1, Werner Heil1, Kai Lenz1, Sergej Karpuk1, Yuri Sobolev1, Martin Burghoff2, Silvia Knappe-Grüneberg2, Wolfgang Kilian2, Wolfgang Müller2, Allard Schnabel2, Frank Seifert2, Lutz Trahms2, and Ulrich Schmidt3 — 1Universität Mainz — 2PTB Berlin — 3Universität Heidelberg
We report on an experiment to search for a new spin-dependent short-range interaction which could be caused by light pseudoscalar bosons such as the axion that was originally proposed as a solution to the strong CP problem. Of interest here is the search for axion mediated short range interaction between a fermion and the spin of another fermion.
To search for this effect co-located, nuclear spin polarized 3He and 129Xe atoms are used. The new approach we made is to measure the free nuclear spin precession frequencies in a homogeneous magnetic guiding field of about 400 nT using LTC SQUID detectors. The whole setup is housed in a magnetically shielded room at the Physikalisch Technische Bundesanstalt (PTB) in Berlin.
In this talk we present new results from the September 2010 run which gives new upper limits on the scalar-pseudoscalar coupling of axion-like particles in the axion-mass window from 10−2 eV to 10−6 eV.