SN 1987A gamma-ray limits on the conversion of pseudoscalars
SN 1987A gamma-ray limits on the conversion of pseudoscalars
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DOI：
10.1016/0370-2693(96)00778-2
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发表时间：
1996-09-12
影响因子：
4.4
通讯作者：
Raffelt, GG
中科院分区：
文献类型：
--
作者：
Brockway, JW;Carlson, ED;Raffelt, GG
赝标量粒子通常通过1/4g phi F（F）/波浪线的相互作用进行电磁耦合，使它们在磁场存在时转换为光子。值得注意的是，从超新星（SN）1987 A发射的新的低质量赝标量在星系的磁场中被转换为伽马射线。因此，假设赝标量是无质量的，由太阳活动高峰期使命（SMM）伽马射线光谱仪（GRS）进行的测量可以将逆耦合常数限制在g（-1）> 1x 10（11）GeV。这比其他天体物理极限提高了约2.5倍。
Pseudoscalar particles phi usually couple electromagnetically by an interaction of the form 1/4g phi F (F) over tilde, allowing them to convert to photons in the presence of magnetic fields. Notably, new low-mass pseudoscalars emitted from supernova (SN) 1987A would have been converted to gamma-rays in the intervening magnetic field of the galaxy. Therefore, measurements by the Solar Maximum Mission (SMM) Gamma-Ray Spectrometer (GRS) can limit the inverse coupling constant to g(-1) > 1x10(11) GeV, assuming the pseudoscalar is massless. This is an improvement over other astrophysical limits of a factor of about 2.5.