GammeV and GammeV-CHASE Page: 4 of 6
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0.4 0 5 0.6 7 .08 0.9 1 2
1e-2 Collider constraints
I 1e-6 GammeV
1 -05 0.0001 0.001 0.01 0.1
effective mass meff [eV]
Figure 2: Published exclusion regions of photon coupling versus effective
mass obtained (a) by GammeV for scalar and pseudoscalar (inset) axion-like
particles at 3c- and (b) by GammeV and GammeV-CHASE for chameleon
particles at 95% C.L. where the GammeV and GammeV-CHASE regions
are valid for 'q > 0.8 and 0.1 respectively when expressing meff > p0.
5 Status and Schedule
The experiments are completed and the results have been published. The
GammeV goal has been achieved of excluding the WISP interpretation of the
PVLAS anomolous signal  and setting first limits on chameleon photon
coupling . The GammeV-CHASE experiment achieved its goal  of
extending the region of exclusion for chameleon photon couplings valid for
a larger range of potential models .
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Wester, W. GammeV and GammeV-CHASE, report, November 1, 2011; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc836765/m1/4/: accessed February 21, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.