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001     297020
005     20211110133944.0
024 7 _ |a 10.3204/DESY-PROC-2008-02/sakharov_alexander
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024 7 _ |a arXiv:0809.0612
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088 1 _ |a arXiv:0809.0612; CERN-PH-TH-2008-187
088 _ _ |a arXiv:0809.0612
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088 _ _ |a CERN-PH-TH-2008-187
|2 CERN
100 1 _ |a Rubbia, Andre
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111 2 _ |a 4th Patras Workshop on Axions, WIMPs and WISPs
|g AXION-WIMP 2008
|c Hamburg
|d 2008-06-18 - 2008-06-21
|w Germany
245 _ _ |a Polarization mesurements of gamma ray bursts and axion like particles
260 _ _ |c 2009
|b Deutsches Elektronen-Synchrotron, DESY
|a Hamburg
300 _ _ |a 65-68
336 7 _ |a Conference Paper
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336 7 _ |a Internal Report
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336 7 _ |a INPROCEEDINGS
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520 _ _ |a A polarized gamma ray emission spread over a sufficiently wide energy band from a strongly magnetized astrophysical object like gamma ray bursts (GRBs) offers an opportunity to test the hypothesis of axion like particles (ALPs). Based on evidences of polarized gamma ray emission detected in several gamma ray bursts we estimated the level of ALPs induced dichroism, which could take place in the magnetized fireball environment of a GRB. This allows to estimate the sensitivity of polarization measurements of GRBs to the ALP-photon coupling. This sensitivity $\gag\le 2.2\cdot 10^{-11} {\rm GeV^{-1}}$ calculated for the ALP mass $m_a=10^{-3}~{\rm eV}$ and MeV energy spread of gamma ray emission is competitive with the sensitivity of CAST and becomes even stronger for lower ALPs masses.
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700 1 _ |a Sakharov, Alexander
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773 _ _ |a 10.3204/DESY-PROC-2008-02/sakharov_alexander
787 0 _ |a Lindner, Axel et.al.
|d Verlag Deutsches Elektronen-Synchrotron, 2008
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|0 PUBDB-2016-01759
|r DESY-PROC-2008-02
|t Proceedings, 4th Patras Workshop on Axions, WIMPs and WISPs (AXION-WIMP 2008)
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