کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5493215 1526284 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The QUAX-gpgs experiment to search for monopole-dipole Axion interaction
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
The QUAX-gpgs experiment to search for monopole-dipole Axion interaction
چکیده انگلیسی
The QCD axion is an hypothetical particle introduced to solve the strong CP problem of standard model of particle physics and is of interest as a possible component of cold dark matter. In the axion scenario, J.E. Moody and F. Wilczek showed that a new macroscopic long-range force, mediated by axion exchange, acts on electron spins, and that such force can be described in terms of an effective magnetic field. The QUAX-gpgs experiment, carried out at INFN Laboratori Nazionali di Legnaro, is designed to search for the effects on magnetized samples of the effective field produced by unpolarized mass sources. As this field is macroscopic, it can be detected by measuring the change of magnetization of a paramagnetic Gadolinium silicate (GSO) crystal cooled at liquid helium temperature. The axion effective field induced magnetization can be detected with a SQUID magnetometer. By varying the position of the of source masses, the induced GSO magnetization is modulated at acoustic frequencies. Although the full QUAX-gpgs sensitivity has not been yet exploited, we are able to measure a magnetization of 10−17 T at few tens of Hz. With this sensitivity we expect to further improve the upper limit of the coupling of the predicted long-range force in the 10−3 to 1m interval.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 842, 11 January 2017, Pages 109-113
نویسندگان
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