TY - JOUR
T1 - A stellar energy loss mechanism involving axions
AU - Krauss, Lawrence
AU - Moody, John E.
AU - Wilczek, Frank
N1 - Funding Information:
The emission of weakly interacting particles from the core of a star will affect its evolution by providing an efficient mechanism for stellar cooling. This fact allows the use of astrophysical observations to constrain the masses and couplings of many as yet unobserved particles proposed by particle theorists. The canonical example of such a particle is the axion, the pseudo-Goldstone boson of the Peccei-Quinn symmetry \[1\ ], introduced to solve the strong CP problem \[2\],a nd extended \[3\] to avoid conflict with experiment. Considerations of stellar evolution \[4\]h ave allowed useful upper bounds to be placed on axion couplings, and in turn lower bounds on the scale of the symmetry breaking to which they are related. The dominant processes which have been studied include the Compton-like and Primakoff processes shown in fig. la, involving both the two fermion and two photon couplings of the axion \[4\].( Electron-positron annihilation and plasmon decay into photon plus axion 1 Junior Fellow, Harvard Society of Fellows. 2 Research supported in part by the National Science Foun-dation under Contract No. PHY-82-15249, and by NSERC. 3 Research supported in part by the National Science Foun-dation under Grant No. PHY77-27084.
PY - 1984/9/6
Y1 - 1984/9/6
N2 - We consider the contribution of bremsstrahlung emission of axions to stellar energy losses. This process has a much weaker temperature dependence than previously considered axion emission processes. It is comparable to these processes in the sun, and for objects with non-degenerate core temperatures less than 85% that of the solar core, axion bremsstrahlung will dominate. We briefly consider the implications of these axionsemission losses for altering the evolution of old globular cluster stars.
AB - We consider the contribution of bremsstrahlung emission of axions to stellar energy losses. This process has a much weaker temperature dependence than previously considered axion emission processes. It is comparable to these processes in the sun, and for objects with non-degenerate core temperatures less than 85% that of the solar core, axion bremsstrahlung will dominate. We briefly consider the implications of these axionsemission losses for altering the evolution of old globular cluster stars.
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U2 - 10.1016/0370-2693(84)91285-1
DO - 10.1016/0370-2693(84)91285-1
M3 - Article
AN - SCOPUS:4243838051
VL - 144
SP - 391
EP - 394
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 5-6
ER -