Probing the scale of grand unification with gravitational waves - INSPIRE

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Probing the scale of grand unification with gravitational waves

Wilfried Buchmuller
(
- DESY
)
,
Valerie Domcke
(
- DESY
)
,
Hitoshi Murayama
(
- DESY and
- UC, Berkeley and
- LBL, Berkeley and
- Tokyo U., IPMU
)
,
Kai Schmitz
(
- CERN
)

Dec 8, 2019

5 pages

Published in:

Phys.Lett.B 809 (2020) 135764

Published: Sep 3, 2020

e-Print:

1912.03695 [hep-ph]

DOI:

10.1016/j.physletb.2020.135764

Report number:

CERN-TH-2019-215,
DESY-19-210,
DESY 19-210,
IPMU 19-0179

View in:

reference search113 citations

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Abstract: (Elsevier)

The spontaneous breaking of U(1)B−L around the scale of grand unification can simultaneously account for hybrid inflation, leptogenesis, and neutralino dark matter, thus resolving three major puzzles of particle physics and cosmology in a single predictive framework. The B−L phase transition also results in a network of cosmic strings. If strong and electroweak interactions are unified in an SO(10) gauge group, containing U(1)B−L as a subgroup, these strings are metastable. In this case, they produce a stochastic background of gravitational waves that evades current pulsar timing bounds, but features a flat spectrum with amplitude h2ΩGW∼10−8 at interferometer frequencies. Ongoing and future LIGO observations will hence probe the scale of B−L breaking.

Note:

6 pages, 3 figures. v2: updated references, matches version published in PLB

scale: grand unified theory
gravitational radiation: background
neutralino: dark matter
background: stochastic
cosmic string: network
inflation: hybrid
spontaneous symmetry breaking
electroweak interaction
critical phenomena
cosmological model

References(46)

Figures(3)

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