Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: General relativistic massive vector field effects in Gamma Ray Burst
  production   To explain the extremely high energy release, $>10^{53}$~erg, suggested by
the observations of some Gamma Ray Bursts (GRBs) we propose a new energy
extraction mechanism from the rotation energy of a Kerr-Newman black hole (BH)
by a massive photon field. Numerical results show that this mechanism is stable
with respect to the black hole rotation parameter, $a$, with a clear dependence
on the BH mass, $M$, and charge, $Q$, and can extract energies up to $10^{54}$
erg. The controversial "energy crisis" problem of GRBs that does not show
evidence for collimated emission may benefit of this energy extraction
mechanism. With these results we set a lower bound on the coupling between
electromagnetic and gravitational fields.

31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int